1
0
mirror of https://github.com/golang/go synced 2024-11-18 16:04:44 -07:00
Commit Graph

722 Commits

Author SHA1 Message Date
Rebecca Stambler
9d5940d493 internal/lsp: refactor and propagate errors from code actions
This change makes sure that all errors in code actions are returned,
instead of ignored. There is also a refactoring of the suggested fixes
for go.mod files so that we don't compute them unless there is already a
matching diagnostic.

Change-Id: I34afda0116f3cc7e47809d980a0171487787e55e
Reviewed-on: https://go-review.googlesource.com/c/tools/+/221221
Run-TryBot: Rebecca Stambler <rstambler@golang.org>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: Rohan Challa <rohan@golang.org>
2020-03-31 20:20:46 +00:00
Rebecca Stambler
a7c0594f4e internal/lsp: avoid logging context cancellation
This change adds a helper function that checks if the context is
canceled, and if so, doesn't log the error. Tried to use it everywhere
in internal/lsp where it fits, which resulted in changing a few pieces
of error handling throughout.

Updates golang/go#37875

Change-Id: I59cbc6f893e3b70cf84524d9944ff7f4b4febd78
Reviewed-on: https://go-review.googlesource.com/c/tools/+/226371
Run-TryBot: Rebecca Stambler <rstambler@golang.org>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: Ian Cottrell <iancottrell@google.com>
Reviewed-by: Heschi Kreinick <heschi@google.com>
2020-03-31 01:46:33 +00:00
Rohan Challa
31583a0dbb internal/lsp/tests: remove ellipses from test names
This change makes working with tests easier by trimming the folder name
up to "testdata". This will remove any ellipses from the test folder name.

Fixes golang/go#38103

Change-Id: I33b931e527de63713b8fc370c50b1c382796b2b8
Reviewed-on: https://go-review.googlesource.com/c/tools/+/226377
Reviewed-by: Rebecca Stambler <rstambler@golang.org>
Run-TryBot: Rohan Challa <rohan@golang.org>
TryBot-Result: Gobot Gobot <gobot@golang.org>
2020-03-30 17:55:17 +00:00
Rohan Challa
eabff7e044 internal/lsp/analysis: add quickfix for "no new vars on left side"
This change adds a quick fix for type errors of the type "no new vars on left side of :=". It will replace the ":=" with an "=".

Updates golang/go#34644

Change-Id: I91af8eb82956104229c3b4f3d0fce60fdfdbb5ea
Reviewed-on: https://go-review.googlesource.com/c/tools/+/225477
Run-TryBot: Rohan Challa <rohan@golang.org>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: Rebecca Stambler <rstambler@golang.org>
2020-03-27 19:15:53 +00:00
Rohan Challa
f4fcf867e7 internal/lsp/analysis: add quickfix for "no result values expected"
This change adds a quick fix for type errors of the type "no result values expected". It will replace the return statment with an empty return statement.

Updates golang/go#34644

Change-Id: I3885748dfc69a2d19f8e7a2e81f36f6d0a20d25b
Reviewed-on: https://go-review.googlesource.com/c/tools/+/223666
Run-TryBot: Rohan Challa <rohan@golang.org>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: Rebecca Stambler <rstambler@golang.org>
2020-03-27 18:57:59 +00:00
Rohan Challa
afab6edfad internal/lsp/source: remove unused parameters from functions
This change uses the new unusedparams analyzer to remove any unused parameters from functions inside of internal/lsp/source :)

Change-Id: I220100e832971b07cd80a701cd8b293fe708af3d
Reviewed-on: https://go-review.googlesource.com/c/tools/+/225997
Run-TryBot: Rohan Challa <rohan@golang.org>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: Rebecca Stambler <rstambler@golang.org>
2020-03-27 18:57:18 +00:00
Rohan Challa
8f81e2e6d4 internal/lsp/analysis: add quickfix for undeclared variable
This change adds a quick fix for diagnostics that have an error message of the form "undeclared name: %s". It provides a quick fix to add a new variable with that name.

Updates golang/go#34644

Change-Id: I6534ee79d1770d1a62bac169c3c7e52e2443f39e
Reviewed-on: https://go-review.googlesource.com/c/tools/+/222237
Run-TryBot: Rohan Challa <rohan@golang.org>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: Rebecca Stambler <rstambler@golang.org>
2020-03-27 18:31:06 +00:00
Rohan Challa
42235f6384 internal/lsp: add support for type error analyzers
This change adds support within gopls for analyzers that work with type errors to provide suggested fixes.

Updates golang/go#34644

Change-Id: Ia8929173752fda6bd84a9edaabd310e758f25fe8
Reviewed-on: https://go-review.googlesource.com/c/tools/+/222761
Run-TryBot: Rohan Challa <rohan@golang.org>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: Rebecca Stambler <rstambler@golang.org>
2020-03-27 17:27:16 +00:00
Rebecca Stambler
eca45d481d internal/lsp: refactor references/rename/implementations
As part of investigating golang/go#38100, I noticed a few things that I
wanted to clean up. Mostly, for renames, we were calling
qualifiedObjAtProtocolPos twice, so I factored out a shared helper
function. I also added an error return for builtins so that callers
don't have to check.

Change-Id: I28c75c801cbec1611736af931cfa72befd219201
Reviewed-on: https://go-review.googlesource.com/c/tools/+/225777
Run-TryBot: Rebecca Stambler <rstambler@golang.org>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: Rohan Challa <rohan@golang.org>
2020-03-27 17:09:18 +00:00
Rohan Challa
5d86d385bf internal/lsp/analysis: add simplify-slice pass from "gofmt -s"
This is one of the simplifications that "gofmt -s" applies.
https://golang.org/cmd/gofmt/#hdr-The_simplify_command

A slice expression of the form:
	s[a:len(s)]
will be simplified to:
	s[a:]

Updates golang/go#37221

Change-Id: Ibd4dedaadc9b129d5d39524f0c1ccc8a95bf7e0d
Reviewed-on: https://go-review.googlesource.com/c/tools/+/223659
Run-TryBot: Rohan Challa <rohan@golang.org>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: Rebecca Stambler <rstambler@golang.org>
Reviewed-by: Michael Matloob <matloob@golang.org>
2020-03-26 21:04:57 +00:00
Rohan Challa
e428a8eca3 internal/lsp/analysis: add simplify-composite-lit pass from "gofmt -s"
This is one of the simplifications that "gofmt -s" applies.
https://golang.org/cmd/gofmt/#hdr-The_simplify_command

An array, slice, or map composite literal of the form:
	[]T{T{}, T{}}
will be simplified to:
	[]T{{}, {}}

Updates golang/go#37221

Change-Id: I2dca46501983c8af3581c9319d973da5cf690388
Reviewed-on: https://go-review.googlesource.com/c/tools/+/223660
Run-TryBot: Rohan Challa <rohan@golang.org>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: Rebecca Stambler <rstambler@golang.org>
Reviewed-by: Michael Matloob <matloob@golang.org>
2020-03-26 20:50:12 +00:00
Rohan Challa
88b9c284fd internal/lsp/analysis: add pass for unused parameters
This change adds a pass that checks for unused parameters inside of a function. It is disabled by default.

Updates golang/go#36602

Change-Id: I9e8de3368f16f27e7816ec4ddb16935e1a05584e
Reviewed-on: https://go-review.googlesource.com/c/tools/+/222817
Run-TryBot: Rohan Challa <rohan@golang.org>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: Rebecca Stambler <rstambler@golang.org>
2020-03-26 20:36:28 +00:00
Rohan Challa
94fe02cb5c internal/lsp/analysis: add simplify-range pass from "gofmt -s"
This is one of the simplifications that "gofmt -s" applies.
https://golang.org/cmd/gofmt/#hdr-The_simplify_command

A range of the form:
	for x, _ = range v {...}
will be simplified to:
	for x = range v {...}

A range of the form:
	for _ = range v {...}
will be simplified to:
	for range v {...}

Updates golang/go#37221

Change-Id: Ic6babbd0b8ab961ebb4d0d6df72df52d9acde6e7
Reviewed-on: https://go-review.googlesource.com/c/tools/+/223661
Run-TryBot: Rohan Challa <rohan@golang.org>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: Heschi Kreinick <heschi@google.com>
Reviewed-by: Michael Matloob <matloob@golang.org>
Reviewed-by: Rebecca Stambler <rstambler@golang.org>
2020-03-26 20:18:45 +00:00
Rohan Challa
e46a7b92c0 internal/lsp: add support for sourceFixAll analyzers
This change adds support for analyzers that have suggested fixes of the kind Source.FixAll. This will allow these fixes to be applied on save if the user desires.

To auto apply these fixes on save, make sure your settings.json looks like:

"[go]": {
	"editor.codeActionsOnSave": {
		...
		"source.fixAll": true,
		...
	},
	...
}

Update golang/go#37221

Change-Id: I534e4f6c8c51ec2848cf2899aab68f587ba68423
Reviewed-on: https://go-review.googlesource.com/c/tools/+/223658
Run-TryBot: Rohan Challa <rohan@golang.org>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: Rebecca Stambler <rstambler@golang.org>
2020-03-26 20:01:16 +00:00
Rohan Challa
02a6ca6dc3 internal/lsp: change disabledAnalyses setting to be general
This change removes the disabledAnalyses setting and replaces it with a more general feature named "analyses". This will allow users to opt in as well as opt out of analyzers that they do not find useful. This also updates some documentation to show users what analyzers gopls is using and which are enabled by default.

Change-Id: Id3239b4c4c9667e834f262c889270d14fdba0f93
Reviewed-on: https://go-review.googlesource.com/c/tools/+/223662
Run-TryBot: Rohan Challa <rohan@golang.org>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: Rebecca Stambler <rstambler@golang.org>
2020-03-26 19:30:34 +00:00
Rebecca Stambler
52ff224b76 internal/lsp: avoid possible nil pointer in references/rename
Noticed this in https://github.com/fatih/vim-go/issues/2786. I don't
think that this will fix the problem in this issue, but we should avoid
nil pointers as much as possible. Also, remove a bit of extra whitespace
so that the style closer matches that of the rest of the project.

Change-Id: I94b924ea14e4a296382e3e68c52eeb43f6cd86a6
Reviewed-on: https://go-review.googlesource.com/c/tools/+/225523
Run-TryBot: Rebecca Stambler <rstambler@golang.org>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: Heschi Kreinick <heschi@google.com>
2020-03-26 18:28:26 +00:00
Heschi Kreinick
e2e2519b1d lsp/source: create zero value ast.Exprs
In support of https://golang.org/cl/224960, add utility functions that
create zero value expressions for a given types.Type. There are probably
some bugs here but they pass the basic tests in that CL.

Known problems: it skips through type aliases, and can't handle
anonymous structs/interfaces. Hopefully it's pretty unusual to return
those.

Change-Id: I69a388d9ce9bd60bc230e4a3d2b30f581ec25698
Reviewed-on: https://go-review.googlesource.com/c/tools/+/225177
Run-TryBot: Heschi Kreinick <heschi@google.com>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: Rohan Challa <rohan@golang.org>
Reviewed-by: Rebecca Stambler <rstambler@golang.org>
2020-03-26 17:41:01 +00:00
Rebecca Stambler
6fc5d0bc36 internal/lsp: print view-specific environment
For debugging purposes, we print the output of `go env` on start. Now,
we print a view-specific `go env`, which will helps us when debugging
multi-project workspaces. Additional information included: the folder of
the view, if the view has a valid build configuration, and the build
flags for the view.

Updates golang/go#37978

Change-Id: Iadffd46f8ac5410971558a304b8bbcb2f9bdbcc3
Reviewed-on: https://go-review.googlesource.com/c/tools/+/225137
Run-TryBot: Rebecca Stambler <rstambler@golang.org>
Reviewed-by: Heschi Kreinick <heschi@google.com>
2020-03-24 20:15:47 +00:00
Muir Manders
ef1313dc6d internal/lsp/source: prefer unexported and non-func candidates
A common annoying mis-completion is as follows:

    type foo struct {
      field int
    }

    func (f foo) Field() int { return f.field }

    func (f foo) logic() {
      if f.f<>
    }

Now at <> we prefer "field" over "Field()". Similarly:

    type foo struct {
    }

    func (f foo) DoSomething() { }

    func (f foo) doSomething() { }

    func (f foo) logic() {
      f.d<>
    }

Now at <> we prefer "doSomething()" over "DoSomething()". All else
being equally, you normally want private objects over public objects
when the private objects are available.

The same logic is applied to deep completions so we prefer "c.foo.bar"
over "c.Foo().bar".

Change-Id: Ic91cba7721ddb1f2a30338037693ddcce8c621f7
Reviewed-on: https://go-review.googlesource.com/c/tools/+/223877
Run-TryBot: Muir Manders <muir@mnd.rs>
Run-TryBot: Rebecca Stambler <rstambler@golang.org>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: Rebecca Stambler <rstambler@golang.org>
2020-03-23 21:07:25 +00:00
Rebecca Stambler
18ea2c8f73 internal/lsp: fix nil pointer in renaming to "error"
Fixes golang/go#37963

Change-Id: I0a46cbcbd250729761b9a8323b942202bb1dbd75
Reviewed-on: https://go-review.googlesource.com/c/tools/+/224477
Run-TryBot: Rebecca Stambler <rstambler@golang.org>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: Rohan Challa <rohan@golang.org>
2020-03-23 16:43:54 +00:00
Rob Findley
9a0fabac01 internal/lsp: fix errors found by staticcheck
While experimenting with different static analysis on x/tools, I noticed
that there are many actionable diagnostics found by staticcheck. Fix the
ones that were not false positives.

Change-Id: I0b68cf1f636b57b557db879fad84fff9b7237a89
Reviewed-on: https://go-review.googlesource.com/c/tools/+/222248
Run-TryBot: Robert Findley <rfindley@google.com>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: Rebecca Stambler <rstambler@golang.org>
2020-03-19 19:20:54 +00:00
Ian Cottrell
d7fc2cf50e internal/telemetry: delete the event.TagOf method
It encourages poor performing log lines, and also reduces the readability of
those lines.
Also delete the Key.With method which was unused, and should never be used
instead of the event.Label function anyway.

Change-Id: I9b55102864ee49a7d03e60af022a2002170c0fb1
Reviewed-on: https://go-review.googlesource.com/c/tools/+/222851
Run-TryBot: Ian Cottrell <iancottrell@google.com>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: Emmanuel Odeke <emm.odeke@gmail.com>
2020-03-18 13:23:15 +00:00
Ian Cottrell
04208b9e8a internal/lsp: move the telemetry package
Move the lsp specific telemetry package that just declares the labels under the
debug package and call it tag, to make all the usages much more readable.

Change-Id: Ic89b3408dd3b8b3d914cc69d81f41b8919aaf424
Reviewed-on: https://go-review.googlesource.com/c/tools/+/222850
Run-TryBot: Ian Cottrell <iancottrell@google.com>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: Emmanuel Odeke <emm.odeke@gmail.com>
2020-03-18 13:22:49 +00:00
Muir Manders
11a475a590 internal/lsp/source: fix literal completions in variadic args
We now properly offer literal completions when completing the variadic
parameter. For example:

    func foo(...[]int) {}
    foo(<>) // now offers "[]int{}"

Updates golang/go#37656.

Change-Id: I91c47d455ae3f8051078c82a308f2b5ad4b3d4cd
Reviewed-on: https://go-review.googlesource.com/c/tools/+/222199
Run-TryBot: Muir Manders <muir@mnd.rs>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: Rebecca Stambler <rstambler@golang.org>
2020-03-18 05:47:22 +00:00
Muir Manders
613a0345a2 internal/lsp/source: optimize enumeration of a type's fields
When searching for deep completions, we can end up enumerating struct
types' fields a lot. Optimize fieldSelections to reduce work:

- Wait until we see an embedded field before we create the "seen"
  map.
- Use a callback style to iterate over the struct's fields rather than
  returning a slice of fields.
- Change "seen" checking strategy back to track struct types rather
  than each individual field.

Struct with 5 non-embedded fields:

name       old time/op    new time/op    delta
Fields-16     293ns ± 1%      20ns ± 2%   -93.13%  (p=0.008 n=5+5)

name       old alloc/op   new alloc/op   delta
Fields-16      120B ± 0%        0B       -100.00%  (p=0.008 n=5+5)

name       old allocs/op  new allocs/op  delta
Fields-16      4.00 ± 0%      0.00       -100.00%  (p=0.008 n=5+5)

Same struct but add an embedded struct with 2 fields:

name       old time/op    new time/op    delta
Fields-16     389ns ± 1%     142ns ± 1%  -63.53%  (p=0.008 n=5+5)

name       old alloc/op   new alloc/op   delta
Fields-16      120B ± 0%      144B ± 0%  +20.00%  (p=0.008 n=5+5)

name       old allocs/op  new allocs/op  delta
Fields-16      4.00 ± 0%      2.00 ± 0%  -50.00%  (p=0.008 n=5+5)

I think the alloc/op went up because the "seen" map is no longer
allocated on the stack. There is more room for more optimization, but
it's probably not worth making things more complicated.

Change-Id: I6f9f2124334a8594ef9d6f9b5ac4b3a8aead5f49
Reviewed-on: https://go-review.googlesource.com/c/tools/+/223419
Run-TryBot: Muir Manders <muir@mnd.rs>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: Rebecca Stambler <rstambler@golang.org>
2020-03-18 05:47:12 +00:00
Rohan Challa
d05f4d6edb internal/lsp: fix breadcrumbs when inside of a method
This change fixes breadcrumbs when the cursor is inside of a method by making the method a top level symbol and removing it from the struct's hierarchy.

Fixes golang/go#36949

Change-Id: I8da5f453a5c78ade1e7688fc4eeebf79ce96f1e1
Reviewed-on: https://go-review.googlesource.com/c/tools/+/221819
Run-TryBot: Rohan Challa <rohan@golang.org>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: Rebecca Stambler <rstambler@golang.org>
2020-03-17 19:04:34 +00:00
Marwan Sulaiman
63da46f303 x/tools/gopls: run go generate through CodeLens
This change adds support for recognizing a //go:generate directive
and offering a CodeLens that will then send a "generate" command to
the server to run "go generate" or "go generate ./...". Because
"go generate" can only be executed per package, there is no need to show
the CodeLens on top of every //go:generate comment. Therefore, only the
top directive will be considered.

The stdout/stderr of the go generate command will be piped to the logger
while stderr will also be sent to the editor as a window/showMessage

The user will only know when the process starts and when it ends so that they wouldn't
get bogged with a large number of message windows popping up. However, they can
check the logs for all the details.

If a user wants to cancel the "go generate" command, they will be able
to do so with a "Cancel" ActionItem that the server will offer to the client

Fixes golang/go#37680

Change-Id: I89a9617521eab20859cb2215db133f34fda856c7
Reviewed-on: https://go-review.googlesource.com/c/tools/+/222247
Run-TryBot: Rebecca Stambler <rstambler@golang.org>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: Rebecca Stambler <rstambler@golang.org>
2020-03-17 04:34:34 +00:00
Muir Manders
11d5b4c81c internal/lsp/source: offer loop keyword completions in range stmt
Be sure to offer "continue" and "break" keyword completions in
RangeStmt in addition to ForStmt.

Fixes golang/go#34009.

Change-Id: I01ea0c3d8d110e322cb6582fda32aeb060116bb1
Reviewed-on: https://go-review.googlesource.com/c/tools/+/223120
Run-TryBot: Muir Manders <muir@mnd.rs>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: Rebecca Stambler <rstambler@golang.org>
2020-03-12 04:57:24 +00:00
Ian Cottrell
206ec5b82a internal/lsp: migrate telemetry to using the event package
Change-Id: Idc662385ed08bd62593ccd1d54afd3fa8c1a7d29
Reviewed-on: https://go-review.googlesource.com/c/tools/+/222558
Run-TryBot: Ian Cottrell <iancottrell@google.com>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: Robert Findley <rfindley@google.com>
2020-03-12 03:59:16 +00:00
Muir Manders
43e3193a9b internal/lsp/source: suppress keyword completions in "case" statement
Now we no longer offer keyword completions inside "case" statements:

    select {
    case fo<>: // don't offer "for"
    }

Updates golang/go#34009.

Change-Id: I908eda32af01fd1912fb587ce59efef1798b6741
Reviewed-on: https://go-review.googlesource.com/c/tools/+/220580
Run-TryBot: Muir Manders <muir@mnd.rs>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: Rebecca Stambler <rstambler@golang.org>
2020-03-11 03:54:31 +00:00
Muir Manders
7bb885034f internal/lsp/source: fix completion in empty switch statements
Now we properly offer "case" and "default" keyword completion in cases
like:

    switch {
      <>
    }

First I had to add an AST fix for empty switch statements to move the
closing brace down. For example, say the user is completing:

    switch {
    ca<>
    }

This gets parsed as:

    switch {
    }

Even if we manually recover the "ca" token, "<>" is not positioned
inside the switch statement anymore, so we don't know to offer "case"
and "default" candidates. To work around this, we move the closing
brace down one line yielding:

    switch {

    }

Second I had to add logic to manually extract the completion prefix
inside empty switch statements, and finally some logic to offer (only)
"case" and "default" candidates in empty switch statements.

Updates golang/go#34009.

Change-Id: I624f17da1c5e73faf91fe5f69e872d86f1cf5482
Reviewed-on: https://go-review.googlesource.com/c/tools/+/220579
Run-TryBot: Muir Manders <muir@mnd.rs>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: Rebecca Stambler <rstambler@golang.org>
2020-03-11 03:54:16 +00:00
Muir Manders
0983143fce internal/lsp/source: avoid type checking in AllImportsFixes
Change AllImportsFixes to get the ParseGoHandle directly rather than
using getParsedFile. The latter also type checks the containing
package, which is slow in general and can be really slow in certain
circumstances. This should speed up the organizeImports code action.

Change-Id: Ic505873db41d5d76c398cee42f0323e390d9e034
Reviewed-on: https://go-review.googlesource.com/c/tools/+/222780
Run-TryBot: Muir Manders <muir@mnd.rs>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: Heschi Kreinick <heschi@google.com>
2020-03-10 23:10:53 +00:00
Muir Manders
138c814f66 internal/lsp/source: offer completion "if err != nil { return err }"
Now we offer an error-check-and-return completion candidate when
appropriate:

    func myFunc() (int, error) {
      f, err := os.Open("foo")
      <>
    }

offers the candidate:

    if err != nil {
      return 0, <err>
    }

where <> denotes a placeholder so you can easily alter "err".

The completion will only be offered when:
1. The position is in a function that returns an error as final result
   value, and
2. The statement preceding position is an assignment whose final LHS
   value is an error.

The completion will contain zero values for the non-error return values
as necessary.

Using the above example, the completion will be offered after the user
has typed:

    i
    if
    if err

Basically the candidate will be offered after every keystroke as the
user types "if err".

I call this new type of completion a statement completion - perfect
for when you want to make a statement!

Change-Id: I0a330e1c1fa81a2757d3afc84c24e853f46f26b0
Reviewed-on: https://go-review.googlesource.com/c/tools/+/221613
Run-TryBot: Muir Manders <muir@mnd.rs>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: Rebecca Stambler <rstambler@golang.org>
2020-03-10 21:06:53 +00:00
Muir Manders
92d517f97b internal/lsp/source: suppress completions in ellipsis
Editors typically trigger completion automatically after ".". This
pops up annoying, useless completions after "..." variadic param, such
as "foo(bar...<>)". We now suppress completions in or directly after
the ellipsis.

Fixes golang/go#37358.

Change-Id: I9fc94fbdf69429bd787bcb2c643f4f730e24154d
Reviewed-on: https://go-review.googlesource.com/c/tools/+/222200
Run-TryBot: Muir Manders <muir@mnd.rs>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: Rebecca Stambler <rstambler@golang.org>
2020-03-09 18:42:16 +00:00
Danish Prakash
c94e1fe145 internal/lsp/source: return location(s) for imported packages
Fixes golang/go#32993

Change-Id: Iff2f7ab8e34eea1ce7c1ab99fb2e51589dce95c4
Reviewed-on: https://go-review.googlesource.com/c/tools/+/210321
Run-TryBot: Rebecca Stambler <rstambler@golang.org>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: Rebecca Stambler <rstambler@golang.org>
2020-03-09 16:25:02 +00:00
Muir Manders
11ec41452d internal/lsp/source: support completing "range" keyword
We now offer "range" keyword in the for loop init statement:

for i := r<> // offer "range" completion candidate

Updates golang/go#34009.

Change-Id: I2e4c1db11c37127406c78191681c39b9dd3439f7
Reviewed-on: https://go-review.googlesource.com/c/tools/+/220504
Run-TryBot: Muir Manders <muir@mnd.rs>
Reviewed-by: Rebecca Stambler <rstambler@golang.org>
2020-03-08 01:35:34 +00:00
Muir Manders
2047c2d578 internal/lsp/source: complete keywords as types
Offer "struct", "interface", "map", "chan", and "func" keywords when
we expect a type. For example "var foo i<>" will offer "interface".

Because "struct" and "interface" are more often used when declaring
named types, they get a higher score in type declarations. Otherwise,
"map", "chan" and "func" get a higher score.

I also got rid of the special keyword scoring. Now keywords just use
stdScore and highScore. This makes the interplay with other types of
candidates more predictable. Keywords are offered in pretty limited
contexts, so I don't think they will be annoying.

Finally, keyword candidate score is now to be scaled properly based on
how well they match the prefix. Previously they weren't penalized for
not matching well, so there were probably some situations where
keywords were ranked too high.

Updates golang/go#34009.

Change-Id: I0b659c00a8503cd72da28853dfe54fcb67f734ae
Reviewed-on: https://go-review.googlesource.com/c/tools/+/220503
Run-TryBot: Muir Manders <muir@mnd.rs>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: Rebecca Stambler <rstambler@golang.org>
2020-03-08 01:33:38 +00:00
Rohan Challa
e4e22f76d0 internal/lsp: support when hierarchicalDocumentSymbolSupport is false
This change adds support when hierarchicalDocumentSymbolSupport is false, this can happen with editors who have not supported textDocument/DocumentSymbol. As a result, these older lsp clients need to recieve []protocol.SymbolInformation rather than []protocol.DocumentSymbol. This change required some changes to internal/lsp/cmd to handle not knowing which type it is receiving, this required manual parsing inside of cmd/symbols.go.

Fixes golang/go#34893

Change-Id: I944ae24302f155b561047227f65bee34b160def1
Reviewed-on: https://go-review.googlesource.com/c/tools/+/221823
Run-TryBot: Rohan Challa <rohan@golang.org>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: Rebecca Stambler <rstambler@golang.org>
2020-03-06 18:17:37 +00:00
Rohan Challa
a0897bacdd internal/lsp/cmd: improve flexibility of suggested fixes
This change adds support for passing a span to cmd/suggested_fix.go, originally it would just take the filename and apply all the fixes for that file. Now, it can also take just a span within that file and only apply the fixes relevant to that span.

The //@suggestedfix marker now contains an extra parameter to specify which type of codeaction is expected.

Change-Id: I4e94b8dad719f990dc2d0ef3c50816f70f59f737
Reviewed-on: https://go-review.googlesource.com/c/tools/+/222137
Run-TryBot: Rohan Challa <rohan@golang.org>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: Rebecca Stambler <rstambler@golang.org>
2020-03-06 14:31:35 +00:00
Rob Findley
bc073721ad internal/lsp/cache: include session IDs in some cache keys
When caching file data specific to a session (anything with a Version or
tied to a view), we now need to be more careful about the existence of
multiple sessions.

This change fixes a few places where we appear to cache session data
without explicitly referring to the session. In principal this could
cause data corruption in multi-session gopls instances, but I have not
been able to force this to occur in either manual or automated testing.

Also fix a data race to the unsaved overlays:
https://storage.googleapis.com/go-build-log/588ee798/linux-amd64-race_d0762522.log

Updates golang/go#34111

Change-Id: I47117da1aba1afc2e211785544ad3f8b3416d15d
Reviewed-on: https://go-review.googlesource.com/c/tools/+/222059
Run-TryBot: Robert Findley <rfindley@google.com>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: Rohan Challa <rohan@golang.org>
2020-03-05 20:50:14 +00:00
Heschi Kreinick
95d2e580d8 internal/lsp/source: use logical filenames for workspace symbols
We need to use the filename derived from the symbol information, not the
one from CompiledGoFiles, in case of cgo packages.

No tests because workspace symbols are entangled with document symbols,
and the latter doesn't work in cgo packages.

Fixes golang/go#37659.

Change-Id: Ic32293c542830a49b37c25ebf3b231771c3a4225
Reviewed-on: https://go-review.googlesource.com/c/tools/+/222060
Run-TryBot: Heschi Kreinick <heschi@google.com>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: Rebecca Stambler <rstambler@golang.org>
2020-03-04 19:39:43 +00:00
Ian Cottrell
4183ba16a9 internal/lsp: move the debug.Instance onto the Context
This allows us to register a telemetry exporter that works with mulitple active
debug instances.
It also means we don't have to store the debug information in our other objects.

Change-Id: I9a9d5b0407c3352b6eaff80fb2c434ca33f4e397
Reviewed-on: https://go-review.googlesource.com/c/tools/+/221558
Run-TryBot: Ian Cottrell <iancottrell@google.com>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: Robert Findley <rfindley@google.com>
2020-03-03 22:54:53 +00:00
Rohan Challa
55b754b4e0 internal/lsp: fix active param in signature help
This change adjusts where the start and end of the arguments list are when determining which parameter is the active paramter. Rather than use the first and last argument's position, we will use the start and ending parentheses.

Fixes golang/go#37271

Change-Id: I70bc5c8b4bdb5242fc35a20e63b9a8860cb1d6bd
Reviewed-on: https://go-review.googlesource.com/c/tools/+/221817
Run-TryBot: Rohan Challa <rohan@golang.org>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: Rebecca Stambler <rstambler@golang.org>
2020-03-03 19:47:17 +00:00
Rohan Challa
115860e962 internal/lsp: fix concurrent map read/write for missingmodules
This change fixes an issue with concurrent map reads and writes that occurred when determining if an import is missing the corresponding dependency in the go.mod file.

Change-Id: Ic5cf3a620b4fd84eb4a377d0e4c22edbc8f37540
Reviewed-on: https://go-review.googlesource.com/c/tools/+/221897
Run-TryBot: Rohan Challa <rohan@golang.org>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: Rebecca Stambler <rstambler@golang.org>
2020-03-03 19:46:16 +00:00
Rohan Challa
c4f5635f10 internal/lsp: add an upgrade all dependencies codelens
This change adds an upgrade all dependencies codelens on the go.mod file if there are available upgrades.

Updates golang/go#36501

Change-Id: I86c1ae7e7a6dc01b7f5cd7eb18e5a11d96a3acc1
Reviewed-on: https://go-review.googlesource.com/c/tools/+/221108
Run-TryBot: Rohan Challa <rohan@golang.org>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: Rebecca Stambler <rstambler@golang.org>
2020-03-02 21:30:18 +00:00
Muir Manders
8d77031968 internal/lsp/source: fix completion crash with untyped assignee
We were panicking when a LHS assignee's type was nil, such as:

    // "foo" has not been declared
    foo = 123

A recent refactoring changed (*completer).typeMatches() to no longer
gracefully handle a nil types.Type for its first parameter. That
behavior seems fine, so fix the problematic caller of typeMatches to
check for nil before calling.

Change-Id: Ie11e4a2d374ab1efbf6fd13fbe214e06d359fca0
Reviewed-on: https://go-review.googlesource.com/c/tools/+/221020
Reviewed-by: Rebecca Stambler <rstambler@golang.org>
Run-TryBot: Rebecca Stambler <rstambler@golang.org>
TryBot-Result: Gobot Gobot <gobot@golang.org>
2020-03-02 21:29:26 +00:00
Muir Manders
ae0473a2ca internal/lsp/source: support inverse "implementations"
Now "implementations" supports finding interfaces implemented by the
specified concrete type. This is the inverse of what "implementations"
normally does. There isn't currently a better place in LSP to put this
functionality. The reverse lookup isn't an important feature for most
languages because types often must explicitly declare what interfaces
they implement.

An argument can be made that this functionality fits better into find-
references, but it is still a stretch. Plus, that would require
find-references to search all packages instead of just transitive
dependents.

Updates golang/go#35550.

Change-Id: I72dc78ef52b5bf501da2f39692e99cd304b5406e
Reviewed-on: https://go-review.googlesource.com/c/tools/+/219678
Run-TryBot: Rebecca Stambler <rstambler@golang.org>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: Rebecca Stambler <rstambler@golang.org>
2020-03-02 21:28:54 +00:00
Rebecca Stambler
204d844ad4 internal/lsp: mitigate possiibility of a slow code action
Related to https://github.com/microsoft/vscode-go/issues/3063.
A small collection of fixes: (1) Don't reload packages with missing
dependencies unless imports change. (2) Show the error message from the
initial workspace load to the user.

Also, a small fix for deletion suggested fixes - upgrading to the latest
version of the VS Code language client revealed that I had made a
mistake there.

Change-Id: I7ab944ed27dc3da24a79d5d311531a1eb2b73102
Reviewed-on: https://go-review.googlesource.com/c/tools/+/221217
Run-TryBot: Rebecca Stambler <rstambler@golang.org>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: Heschi Kreinick <heschi@google.com>
2020-02-26 22:45:02 +00:00
Anthony Fok
26f6a1b680 internal/lsp/source: fix typo: identifer → identifier
Change-Id: I37da513eb4a28df5054066b94ff1d915b9dce239
Reviewed-on: https://go-review.googlesource.com/c/tools/+/221022
Reviewed-by: Rebecca Stambler <rstambler@golang.org>
Run-TryBot: Rebecca Stambler <rstambler@golang.org>
TryBot-Result: Gobot Gobot <gobot@golang.org>
2020-02-26 18:09:45 +00:00
Rohan Challa
abb57c682a internal/lsp: support textDocument/hover for .mod extension
This change implements support for textDocument/hover when it comes to go.mod files.

Updates golang/go#36501

Change-Id: Ie7da0194bb972955b7ab9cf7b9c9972bd9f4b8a9
Reviewed-on: https://go-review.googlesource.com/c/tools/+/220359
Run-TryBot: Rohan Challa <rohan@golang.org>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: Rebecca Stambler <rstambler@golang.org>
2020-02-26 15:59:49 +00:00
Rohan Challa
48cfad2f5e internal/lsp: support textDocument/documentLink for .mod extension
This change implements support for textDocument/documentLink when it comes to go.mod files.

Updates golang/go#36501

Change-Id: Ic0974e3e858dd1c8df54b7d7abee085bbcb6d4ee
Reviewed-on: https://go-review.googlesource.com/c/tools/+/219938
Run-TryBot: Rohan Challa <rohan@golang.org>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: Rebecca Stambler <rstambler@golang.org>
2020-02-26 15:45:04 +00:00
Heschi Kreinick
c099ead939 internal/lsp/source: limit WorkspaceSymbols results
Searching with an empty string shouldn't return every symbol in the
workspace -- nobody wants that. Limit to 100 results to avoid breaking
editors. (VS Code locks up for like 30 seconds on my workspace.)

Change-Id: I1e0be476e8eeaef9e69767bfa04a89d40bd3a6e5
Reviewed-on: https://go-review.googlesource.com/c/tools/+/220939
Run-TryBot: Heschi Kreinick <heschi@google.com>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: Rebecca Stambler <rstambler@golang.org>
2020-02-25 21:59:15 +00:00
Heschi Kreinick
c5cec6710e all: consolidate invokeGo implementations
Over time we have accumulated a disturbing number of ways to run the Go
command, each of which supported slightly different features and
workarounds. Combine all of them.

This unavoidably introduces some changes in debug logging behavior; I
think we should try to fix them incrementally and consistently.

Updates golang/go#37368.

Change-Id: I664ca8685bf247a226be3cb807789c2fcddf233d
Reviewed-on: https://go-review.googlesource.com/c/tools/+/220737
Run-TryBot: Heschi Kreinick <heschi@google.com>
Reviewed-by: Rebecca Stambler <rstambler@golang.org>
2020-02-25 21:33:46 +00:00
Rob Findley
e02f5847d1 internal/lsp/debug: move all debug state onto the Instance
For testability, and to support the exchange of debug information across
Forwarder and server, it is helpful to encapsulate all debug information
on the instance object.

This CL moves all state in the debug package into a new 'State' type,
that is added as a field on the debug.Instance. While doing so, common
functionality for object collections is factored out into the objset
helper type.

Also add two new debug object types: Client and Server. These aren't yet
used, but will be in a later CL (and frankly it was easier to leave them
in this CL than to more carefully rewrite history...).

Updates golang/go#34111

Change-Id: Ib809cd14cb957b41a9bcbd94a991f804531a76ea
Reviewed-on: https://go-review.googlesource.com/c/tools/+/220078
Run-TryBot: Robert Findley <rfindley@google.com>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: Heschi Kreinick <heschi@google.com>
2020-02-24 22:50:47 +00:00
Muir Manders
023911ca70 internal/lsp/source: untangle completion type comparison
The code to check if a candidate object matches our candidate
inference had become complicated, messy, and in some cases incorrect.
The main source of the complexity is the "derived" expected and
candidate types. When considering a candidate object "foo", we also
consider "&foo", "foo()", and "*foo", as appropriate. On the expected
side of things, when completing the a variadic function parameter we
expect either the variadic slice type and the scalar element type.

The code had grown organically to handle the expanding concerns, but
that resulted in confused code that didn't handle the interplay
between the various facets of candidate inference.

For example, we were inappropriately invoking func candidates when
completing variadic args:

    func foo(...func())
    func bar() {}
    foo(bar<>) // oops - expanded to "bar()"

and we weren't type matching functions properly as builtin args:

    func myMap() map[string]int { ... }
    delete(myM<>) // we weren't preferring (or invoking) "myMap()"

We also had methods like "typeMatches" which took both a "candidate"
object and a "candType" type, which doesn't make sense because the
candidate contains the type already.

Now instead we explicitly iterate over all the derived candidate and
expected types so they are treated the same. There are still some
warts left but I think this is a step in the right direction.

Change-Id: If84a84b34a8fb771a32231f7ab64ca192f611b3d
Reviewed-on: https://go-review.googlesource.com/c/tools/+/218877
Run-TryBot: Muir Manders <muir@mnd.rs>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: Robert Findley <rfindley@google.com>
2020-02-24 18:12:40 +00:00
Muir Manders
8a925fa4c0 internal/lsp/source: improve completions at file scope
Add support for var/func/const/type/import keywords at the file scope.
I left out "package" because, currently, if you are completing
something that means you must already have a package declaration. The
main hurdle was that anything other than a decl keyword shows up as
an *ast.BadDecl at the file scope. To properly detect the prefix we
manually scan for the token containing the position.

I also made a couple small drive-by improvements:
 - Also suggest "goto" and "type" keywords in functions.
 - Allow completing directly before a comment, e.g. "foo<>//". I
   needed this for a test that would have been annoying to write
   otherwise.

Updates golang/go#34009.

Change-Id: I290e7bdda9e66a16f996cdc291985a54bf375231
Reviewed-on: https://go-review.googlesource.com/c/tools/+/217500
Run-TryBot: Rebecca Stambler <rstambler@golang.org>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: Robert Findley <rfindley@google.com>
2020-02-20 22:48:06 +00:00
Rohan Challa
7c4b6277d7 internal/lsp: add module versions from "go list" to pkg.go.dev links
This change appends to the pkg.go.dev link the version of the module that is being used. To get this functionality, go/packages.Package now contains a module field which gets populated from the "go list" call. This module field is then used to get the version of the module that we are linking to.

Updates golang/go#36501

Change-Id: I9668a6da0fd3ec8f4cde017986419c8d28196765
Reviewed-on: https://go-review.googlesource.com/c/tools/+/219079
Run-TryBot: Rohan Challa <rohan@golang.org>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: Rebecca Stambler <rstambler@golang.org>
2020-02-19 19:55:21 +00:00
Rob Findley
c4d4ea9c79 internal/lsp/cache: return concrete types where possible
For testability, and to allow the exchange of debug information when
forwarding the LSP, it will be necessary to access debug information
stored in cache objects. This is cumbersome to do if our constructors
return source interfaces rather than concrete types.

This CL changes cache.New and (*Cache).NewSession to return concrete
types. This required removing NewSession from source.Cache. I would
argue that this makes sense from a philosophical perspective: everything
in the source package operates in a context where the Session and Cache
already exist.

Updates golang/go#34111

Change-Id: I01721db827d51117f9479f1544b15cedae0c5921
Reviewed-on: https://go-review.googlesource.com/c/tools/+/220077
Run-TryBot: Robert Findley <rfindley@google.com>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: Heschi Kreinick <heschi@google.com>
Reviewed-by: Rebecca Stambler <rstambler@golang.org>
2020-02-19 18:42:16 +00:00
Heschi Kreinick
f7b8cc7bd0 internal/span,lsp: disambiguate URIs, DocumentURIs, and paths
Create a real type for protocol.DocumentURIs. Remove span.NewURI in
favor of path/URI-specific constructors. Remove span.Parse's ability to
parse URI-based spans, which appears to be totally unused.

As a consequence, we no longer mangle non-file URIs to start with
file://, and crash all over the place when one is opened.

Updates golang/go#33699.

Change-Id: Ic7347c9768e38002b4ad9c84471329d0af7d2e05
Reviewed-on: https://go-review.googlesource.com/c/tools/+/219482
Run-TryBot: Heschi Kreinick <heschi@google.com>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: Rebecca Stambler <rstambler@golang.org>
2020-02-14 22:51:03 +00:00
Rohan Challa
bc664416c6 internal/lsp: fix error handling when getting go.mod codelens
This change has a fix for mod/codelens: check if we get an error from ParseModHandles().Upgrades(). This change also only runs codelens on save.

Change-Id: I6dab7ddf3a08c650e4c670b039b1e99153ec8187
Reviewed-on: https://go-review.googlesource.com/c/tools/+/219478
Reviewed-by: Rebecca Stambler <rstambler@golang.org>
Run-TryBot: Rohan Challa <rohan@golang.org>
TryBot-Result: Gobot Gobot <gobot@golang.org>
2020-02-14 19:54:16 +00:00
Muir Manders
ea829e2eb2 internal/lsp/source: handle completing into variadic params
For example:

func foo(string, ...int)

func a() string
func b() (string, int)
func c() (string, int, int)

// Prefer "a()" and "b()" and "c()". Previously we didn't prefer any of
// them.
foo(<>)

Fixes golang/go#36540.

Change-Id: I144b3f63942b7699d3034efcc9ad8535a7fa3165
Reviewed-on: https://go-review.googlesource.com/c/tools/+/215538
Run-TryBot: Muir Manders <muir@mnd.rs>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: Robert Findley <rfindley@google.com>
2020-02-14 18:12:26 +00:00
Rohan Challa
98b3097d01 internal/lsp: add codelens for go.mod dependency upgrades
This change adds a code lens for go.mod files that will let a user know if a module can be upgraded, once it is clicked gopls will run a command to update that module.

Updates golang/go#36501

Change-Id: Id22b8097ede4972cf73bc029ec927544a71b7150
Reviewed-on: https://go-review.googlesource.com/c/tools/+/218557
Run-TryBot: Rohan Challa <rohan@golang.org>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: Rebecca Stambler <rstambler@golang.org>
2020-02-14 14:15:08 +00:00
Daisuke Suzuki
885dec1b2d internal/lsp/source: make matchers selectable in WorkspaceSymbols
This change allows to use fuzzy or case-sensitive matchers in addition
to case-insensitive when searching for symbols.
Matcher is specified by UserOptions.Matcher just like Completion.

Updates golang/go#33844

Change-Id: I4000fb7984c75f0f41c38d740dbe164398032312
Reviewed-on: https://go-review.googlesource.com/c/tools/+/218737
Reviewed-by: Rebecca Stambler <rstambler@golang.org>
Run-TryBot: Rebecca Stambler <rstambler@golang.org>
TryBot-Result: Gobot Gobot <gobot@golang.org>
2020-02-13 22:46:20 +00:00
Rohan Challa
695c81b9c6 internal/lsp: fix diagnostics not clearing when creating new files
This change fixes an issue where import errors would not disappear when creating new files in a module by removing the segment of code where we check for listErrors when fixing imports.

Updates golang/go#36960

Change-Id: Iefa17edeb0417cac7e33ffa88faf7c9a607e98b3
Reviewed-on: https://go-review.googlesource.com/c/tools/+/219222
Run-TryBot: Rohan Challa <rohan@golang.org>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: Rebecca Stambler <rstambler@golang.org>
2020-02-13 21:50:53 +00:00
Rohan Challa
0abbfa5d31 internal/lsp: turn tempModfile flag on by default
This change turns the tempModfile flag on by default in the master branch.

Change-Id: If96369aee4e970421a80d5ff89385a38c7ccf0b2
Reviewed-on: https://go-review.googlesource.com/c/tools/+/219225
Run-TryBot: Rohan Challa <rohan@golang.org>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: Rebecca Stambler <rstambler@golang.org>
2020-02-13 15:33:58 +00:00
Muir Manders
49b8ac185c internal/lsp/cache: add file contents to ParseGoHandle
Currently there is no need for this because the file contents are part
of the file handle. This change is in preparation for an impending
improvement that tweaks the source code during the parse stage to fix
certain kind of terminal parse errors. Any code that wants to use
an *ast.File or *token.File in conjunction with the file contents
needs access to the doctored source code so things line up.

Change-Id: I59d83d3d6150aa1264761aa2c1f6c1269075a2ce
Reviewed-on: https://go-review.googlesource.com/c/tools/+/218979
Run-TryBot: Muir Manders <muir@mnd.rs>
Run-TryBot: Rebecca Stambler <rstambler@golang.org>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: Rebecca Stambler <rstambler@golang.org>
2020-02-13 05:05:14 +00:00
Muir Manders
cbc0cc175f internal/lsp/source: fix completion crash in append()
We were crashing in cases like:

    var _ []byte = append([]byte{}, ""...<>)

We were type asserting the type of append's second param
to *types.Slice, but in this case it is a string (*types.Basic). Fix
by checking the type assert was successful.

Note that we still don't attempt to give string completions when
appending to a byte slice. We can add that special case later once
everyone is clamoring for it.

Change-Id: I1d2fbd7f538e580d33c2dab4ef127a88e16d7ced
Reviewed-on: https://go-review.googlesource.com/c/tools/+/219144
Run-TryBot: Muir Manders <muir@mnd.rs>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: Rebecca Stambler <rstambler@golang.org>
2020-02-13 02:33:03 +00:00
Muir Manders
ea181f53ac internal/lsp/source: filter candidates when type name required
Now when we expect a type name at the cursor, we omit non-type name
completion candidates. For example:

inch := 1
var foo in<> // don't offer "inch"

I also added expected type name detection for value specs:

// Expect a type name at <>
var foo <>

Fixes golang/go#32806.

Change-Id: I32477cb286d2050bac5ccc767f8a608124fa5acd
Reviewed-on: https://go-review.googlesource.com/c/tools/+/216400
Run-TryBot: Muir Manders <muir@mnd.rs>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: Robert Findley <rfindley@google.com>
2020-02-12 15:05:39 +00:00
Rebecca Stambler
6822f1ada4 internal/lsp: disable nilness analyzer, unless staticcheck enabled
Users with staticcheck enabled will be more tolerant of increased RAM
usage. We might be able to disable this check entirely once the next
version of staticcheck is released with a similar analysis (https://staticcheck.io/docs/checks#SA5011).

Change-Id: I1a844cc226e34e0f62222f12912797a6cc9d06e2
Reviewed-on: https://go-review.googlesource.com/c/tools/+/219018
Run-TryBot: Rebecca Stambler <rstambler@golang.org>
Reviewed-by: Heschi Kreinick <heschi@google.com>
2020-02-11 20:49:38 +00:00
Muir Manders
2de505fc53 internal/lsp: support multi-dereferencing completion candidates
Now we keep a count of how many times to dereference a candidate. For
example:

    var foo ***int
    var _ int = f<> // Now we offer "***foo" instead of "*foo".

Change-Id: I14edc40aeec6884399eceb3dd3b4f85dc74a773c
Reviewed-on: https://go-review.googlesource.com/c/tools/+/218580
Run-TryBot: Muir Manders <muir@mnd.rs>
Reviewed-by: Rebecca Stambler <rstambler@golang.org>
2020-02-11 04:52:51 +00:00
Muir Manders
1e13d9580f internal/lsp/source: fix type modifier detection in composite literals
When completing a composite literal value, we were returning from
candidate inference before we recorded type modifiers such as prefix
"&" or "*". This was causing funny completions like:

type myStruct struct { s *myStruct }
myStruct{s: &mySt<> // completed to "&&myStruct{}"

Now we properly pick up on the "&" prefix so we know our literal
"myStruct{}" candidate does not need a "&".

Change-Id: I908936698cfedfef81bc0c1cbcd93e14dc00e3a3
Reviewed-on: https://go-review.googlesource.com/c/tools/+/218377
Run-TryBot: Muir Manders <muir@mnd.rs>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: Rebecca Stambler <rstambler@golang.org>
2020-02-11 03:24:02 +00:00
Muir Manders
0bc66720f3 internal/lsp/source: limit to 5 unimported package name candidates
Currently we show up to ~100 unimported package names matching the
completion prefix. This isn't useful since, assuming the user even
wants an unimported package, they will just type more to narrow it
down rather than scroll through 100 options. Having so many candidates
also slows things down due to per-candidate overhead in gopls and in
the LSP client. Now we instead limit to 5 unimported package names.

Unimported package members, on the other hand, make sense to list
many. The user may want to scroll through because they don't remember
the name of what they are looking for. I left the max value at 100.

Change-Id: I00e11fa0420758f8db6c7049f80fa156773a5ee6
Reviewed-on: https://go-review.googlesource.com/c/tools/+/218879
Run-TryBot: Muir Manders <muir@mnd.rs>
Reviewed-by: Heschi Kreinick <heschi@google.com>
TryBot-Result: Gobot Gobot <gobot@golang.org>
2020-02-11 00:32:09 +00:00
Muir Manders
2ef0387721 internal/lsp/source: fix unimported member completion ranking
When completing members on a type checked, unimported package, you get
fully typed members. That means you get deep completions. Because we
downrank the initial unimported package members so much, any deep
completions were dominating the rankings. For example

    context.Back<>

yielded "context.Background().Err" ranked above "context.Background".
Fix by scoring context.Background in this example as
stdScore+tinyRelevanceScore instead of just tinyRelevanceScore. I also
changed untyped candidate scores in the same way so they stay
competitive when you have both imported and unimported candidates.

The other option was to propagate the score penalty into deep
candidates, but that wasn't easy. In general I think you are better off
avoiding big score penalties because they complicate the interplay
between different kinds of candidates. Scoring needs an overhaul, but
at least we are building up our test suite in the meantime.

Change-Id: Ia5d32c057b04174229686cec6ac0542c30e186e2
Reviewed-on: https://go-review.googlesource.com/c/tools/+/218378
Run-TryBot: Muir Manders <muir@mnd.rs>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: Heschi Kreinick <heschi@google.com>
2020-02-10 18:17:33 +00:00
Muir Manders
61798d64f0 internal/lsp: fix crash completing recursive pointer types
We were recursing infinitely evaluating objects of recursive pointer
types such as "type foo *foo". Now we track named pointer types we
have already seen to avoid trying to dereference such objects forever.
I lazily initialized the "seen" map to avoid the allocation in the
normal case when you aren't dealing with named pointer types.

Fixes golang/go#37104.

Change-Id: I5f294cfc5a641e7b5fd24e1d9dc55520726ea560
Reviewed-on: https://go-review.googlesource.com/c/tools/+/218579
Run-TryBot: Muir Manders <muir@mnd.rs>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: Rebecca Stambler <rstambler@golang.org>
2020-02-07 22:44:06 +00:00
Heschi Kreinick
009580c43b internal/lsp/source: export FindFileInpackage
And delete a copy of it.

Change-Id: Ice7b932327dbfe5e00f1d084fc6669f1e4059afe
Reviewed-on: https://go-review.googlesource.com/c/tools/+/218320
Run-TryBot: Heschi Kreinick <heschi@google.com>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: Rebecca Stambler <rstambler@golang.org>
2020-02-07 21:55:11 +00:00
Rebecca Stambler
8bb641bf89 internal/lsp/source: default to full documentation for hover
I'm starting to think that it might make more sense to show all
documentation on hover as a default. A number of people have requested
this behavior, and I think it would help ensure a more consistent
experience for users. We had originally defaulted to the synopsis
because VS Code Go had this behavior, but I see no reason to follow that
as a guideline.

Change-Id: I67aa530d253422550f59b5583e4c4a90ebd48f5b
Reviewed-on: https://go-review.googlesource.com/c/tools/+/217727
Run-TryBot: Rebecca Stambler <rstambler@golang.org>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: Heschi Kreinick <heschi@google.com>
2020-02-07 21:32:44 +00:00
Rebecca Stambler
7cfd24942e internal/lsp/cache: hardcode parse modes instead of guessing them
This change largely reverts CL 217139, which attempted to guess a
package's parse mode based on whether or not it was in the user's
workspace. This ignored the fact that a user may jump to the definition
of a file outside of their workspace.

Fixes golang/go#37045

Change-Id: Icb6b9d055bd1f260013227db1a6a34873c45b680
Reviewed-on: https://go-review.googlesource.com/c/tools/+/218499
Run-TryBot: Rebecca Stambler <rstambler@golang.org>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: Robert Findley <rfindley@google.com>
2020-02-07 20:00:15 +00:00
Tomohiro Kusumoto
112b90105c internal/lsp/source: eliminate setKind
Eliminate unnecessary function

Change-Id: I1b590961c3b2042f244eeb4c11c34fbf20b8b74a
Reviewed-on: https://go-review.googlesource.com/c/tools/+/218138
Reviewed-by: Rebecca Stambler <rstambler@golang.org>
Run-TryBot: Rebecca Stambler <rstambler@golang.org>
TryBot-Result: Gobot Gobot <gobot@golang.org>
2020-02-07 19:42:34 +00:00
Rebecca Stambler
3d51b05cfb internal/lsp: don't use overlays from the session in the snapshot
Hold the session's overlay mutex the whole time we compute new overlays,
and then pass these overlays directly into clone. This avoids us calling
s.session.GetFile, which can return overlays that the snapshot doesn't
yet "know" about.

Change-Id: I1a10c78e26f8fec64550bfe0a97b5975ea8f976b
Reviewed-on: https://go-review.googlesource.com/c/tools/+/218321
Run-TryBot: Rebecca Stambler <rstambler@golang.org>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: Heschi Kreinick <heschi@google.com>
2020-02-07 19:21:16 +00:00
Rebecca Stambler
b753a1ba74 internal/lsp: build overlays through the snapshot
This is the first in a series of changes to move overlay handling to the
snapshot instead of the session. We may not be able to fully get away
from managing overlays on the session, but we should be able to only use
overlays when they are known to the snapshot.

Change-Id: I88b125117cd2cfbd0ff9ef16a944a34297c81b10
Reviewed-on: https://go-review.googlesource.com/c/tools/+/218324
Run-TryBot: Rebecca Stambler <rstambler@golang.org>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: Heschi Kreinick <heschi@google.com>
2020-02-07 18:37:49 +00:00
Rohan Challa
a9bd9c230f internal/lsp/cache: improve ModTidyHandle cache key
This change alters the key that is used to cache go.mod diagnostic changes, in particular it replaces using the snapshot ID with a string of all the imports used in the module and the hashed contents of the go.mod file. This reduces the number of times that we run "go mod tidy" to only when we detect import changes or the go.mod file is changed.

Change-Id: Icf49db34f44a4ae4772fff6dfb8b9a6955a8e2d6
Reviewed-on: https://go-review.googlesource.com/c/tools/+/218238
Reviewed-by: Rebecca Stambler <rstambler@golang.org>
Run-TryBot: Rebecca Stambler <rstambler@golang.org>
TryBot-Result: Gobot Gobot <gobot@golang.org>
2020-02-07 18:07:39 +00:00
emahiro
f8c9a4c3ab internal/lsp: export DiffSymbols to avoid duplication
Change-Id: I9002d19067011e0fcff22782eebc593a124594c3
Reviewed-on: https://go-review.googlesource.com/c/tools/+/218137
Reviewed-by: Rebecca Stambler <rstambler@golang.org>
Run-TryBot: Rebecca Stambler <rstambler@golang.org>
2020-02-06 20:09:13 +00:00
Rebecca Stambler
222e5d4b1b internal/lsp: don't return references for builtins
https://github.com/fatih/vim-go/issues/2701 contains a report of a panic
when finding references on a builtin. Avoid this by simply not returning
any references.

Change-Id: I195fcb4502634201888f0c65022c9d16169cc1f3
Reviewed-on: https://go-review.googlesource.com/c/tools/+/218317
Run-TryBot: Rebecca Stambler <rstambler@golang.org>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: Heschi Kreinick <heschi@google.com>
2020-02-06 19:49:06 +00:00
Rebecca Stambler
6224300ba8 internal/lsp: remove unnecessary source.SignatureInformation type
We should just use the protocol.SignatureInformation type, as it's
essentially the same thing. Refactor tests a bit to make use of the
shared type.

Change-Id: I169949f6e23757ce0a6f54de36560c4c8e0479ad
Reviewed-on: https://go-review.googlesource.com/c/tools/+/217731
Run-TryBot: Rebecca Stambler <rstambler@golang.org>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: Robert Findley <rfindley@google.com>
2020-02-06 19:05:38 +00:00
Rohan Challa
2529d2857a internal/lsp/tests: standardize testdata folder format
This change standardizes the folder structure for testdata that are used for testing the lsp. In particular, it uses the following format:
- dir
  - primarymod
    - .go files
    - packages
    - go.mod (optional)
  - modules
    - repoa
      - mod1
        - .go files
        -  packages
        - go.mod (optional)

As we can see, any folder inside of testdata should be of this format, where the primary test files with the markers are all located inside the primarymod folder. The modules folder is used to hold any potential dependencies that are used for testing.

A consequence of this change is that we can have one directory separated by folders, where each folder is it's own module, this allows us to use internal/lsp/tests with go.mod files. Now, tests.Load() will return an array of Data objects, where each object corresponds to one of the directories structured above.

Updates golang/go#36091

Change-Id: I437cc2a2a9fc1bac93779845737aa74383fbf9c3
Reviewed-on: https://go-review.googlesource.com/c/tools/+/217541
Run-TryBot: Rohan Challa <rohan@golang.org>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: Rebecca Stambler <rstambler@golang.org>
2020-02-06 14:14:23 +00:00
Muir Manders
dd0d5d4851 internal/lsp: filter keyword completions in tests
Filter keywords out of completion results in tests similar to
builtins. You don't care about keyword completions unless you are
explicitly testing keyword completion.

Change-Id: I0caaaef8b0f5b08c4b15ba3ada1a963f35a14028
Reviewed-on: https://go-review.googlesource.com/c/tools/+/217499
Run-TryBot: Muir Manders <muir@mnd.rs>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: Rebecca Stambler <rstambler@golang.org>
2020-02-06 05:08:30 +00:00
Muir Manders
f66ef90017 internal/lsp/source: improve completion after accidental keywords
Completion often fails when the completion prefix happens to be a
keyword. We previously tried to fix this with AST surgery, but
often the accidental keyword is not apparent looking at the AST.
For example:

    chan<>
    foo()

parses as CallExpr{Fun: ChanType{Value: Ident{"foo"}}} with very few
hints that something is wrong, and:

    default
    foo()

is completely omitted from the AST.

Rather than look in the AST, we now instead manually look for a
keyword token that contains the completion position. If we find one,
we treat that as our surrounding identifier.

Updates golang/go#34332.

Change-Id: I68ed0dd905848c0eae61f39ecb8b73adb1e72746
Reviewed-on: https://go-review.googlesource.com/c/tools/+/216961
Run-TryBot: Muir Manders <muir@mnd.rs>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: Rebecca Stambler <rstambler@golang.org>
2020-02-06 05:08:22 +00:00
Muir Manders
50d618665b internal/lsp/source: improve completion involving multiple return values
For example:

// Prefer functions that return one or two values. Previously
// we had no preference.
foo, bar := <>

// Prefer functions that return "(int)" or "(int, ??)". Previously we
// only preferred the former.
var foo int
foo, bar := <>

// Prefer functions that return "(int)" or "(int, int)". Previously we
// only preferred the former.
var foo func(int, int)
foo(<>)

In the above example, we don't handle "foo" being variadic yet.

I also took the liberty to break up matchingCandidate() into separate
functions since it was getting rather long.

Updates golang/go#36540.

Change-Id: I9140dd989dfde1ddcfcd9d2a14198045c02587f2
Reviewed-on: https://go-review.googlesource.com/c/tools/+/215537
Run-TryBot: Muir Manders <muir@mnd.rs>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: Rebecca Stambler <rstambler@golang.org>
2020-02-06 05:07:08 +00:00
Daisuke Suzuki
6e8b36d2c7 internal/lsp: add support for workspace symbol
This change adds support for the LSP workspace/symbol. Unlike
documentSymbol, the target is symbols that exist not only in a specific
file, but also in the current or imported packages. It returns symbols
whose name contains the query string of the request(case-insensitive),
or all symbols if the query string is empty.

However, the following is not implemented:
- Setting of deprecated and containerName fields in SymbolInformation
- Consideration of WorkspaceClientCapabilities
- Progress support
- CLI support

Updates golang/go#33844

Change-Id: Id2a8d3c468084b9d44228cc6ed2ad37c4b52c405
Reviewed-on: https://go-review.googlesource.com/c/tools/+/213317
Reviewed-by: Rebecca Stambler <rstambler@golang.org>
Run-TryBot: Rebecca Stambler <rstambler@golang.org>
TryBot-Result: Gobot Gobot <gobot@golang.org>
2020-02-05 19:03:17 +00:00
Rebecca Stambler
ab391d50b5 internal/lsp: don't show links in hover for test functions
source.Identifier previously was used for references and rename, so it
needed to take a package policy. Now, it's only used for definition and
hover, so it should always be the narrowest package handle. We can use
this fact to determine if the identifier is located in its declaring
package, and if that package is a test variant, we don't link to the
documentation on pkg.go.dev, since it doesn't exist.

Change-Id: I5686828858a3feafb8ff2e4c5964b562f66db9fa
Reviewed-on: https://go-review.googlesource.com/c/tools/+/217137
Run-TryBot: Rebecca Stambler <rstambler@golang.org>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: Heschi Kreinick <heschi@google.com>
2020-02-03 21:56:10 +00:00
Rohan Challa
c4cbd3b08f internal/lsp: add diagnostics in .go files for missing deps in go.mod
This change adds diagnostics to imports in .go files that are missing the dependency in the go.mod file. The quick fix that adds the appropriate require statement is coming in a follow up CL.

Updates golang/go#31999

Change-Id: I314cdbe8e3dd27da744ca0391e7a6e5dc1ebaa77
Reviewed-on: https://go-review.googlesource.com/c/tools/+/216277
Run-TryBot: Rohan Challa <rohan@golang.org>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: Rebecca Stambler <rstambler@golang.org>
2020-02-03 17:57:15 +00:00
Muir Manders
bc0b458b10 internal/lsp/source: improve completion for "make()" args
Fix type inference to expect a type name for the first "make()"
parameter and an integer for later parameters. For example:

   // Previously we expected "[]int{}", now we expect "[]int".
   var _ []int = make(<>)

Note that we don't currently support actually completing to unnamed
type names like "[]int", but this improvement at least eliminates
nonsensical completion suggestions.

   // Previously we had no expectation, now we expect an int.
   var _ []int = make([]int, <>)

Change-Id: Ifd349767662ab6902d3a3ea9e52de7df70cb37c7
Reviewed-on: https://go-review.googlesource.com/c/tools/+/217310
Run-TryBot: Muir Manders <muir@mnd.rs>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: Ingo Oeser <nightlyone@googlemail.com>
Reviewed-by: Rebecca Stambler <rstambler@golang.org>
2020-02-02 23:20:50 +00:00
Rob Findley
b4fe758a9b internal/lsp/source: don't allow mutating DefaultOptions
DefaultOptions was a value type, but held map values. This CL changes it
to a function that returns an Options value that has new instances of
all reference types. It would be better if this function returned a
pointer, but that change ended up being too large. I will need to
refactor handling of options later anyway, in order to support sessions
with differing options for golang.org/issues/34111.

This fixes a race in internal/lsp/tests: internal/hooks/analysis.go
mutates the Analyzers map.

See for example the trybots result at:
https://storage.googleapis.com/go-build-log/0d34f5f0/linux-amd64-race_4ecdf9c8.log

Change-Id: I41be450b590a3f3104ac9a1cb9cb312ea3ff7ff4
Reviewed-on: https://go-review.googlesource.com/c/tools/+/217077
Run-TryBot: Robert Findley <rfindley@google.com>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: Rebecca Stambler <rstambler@golang.org>
Reviewed-by: Heschi Kreinick <heschi@google.com>
2020-01-31 15:48:08 +00:00
Heschi Kreinick
ec2e11d257 internal/lsp/source: check cancellation before analysis
We check cancellation pretty early on in analysis, but not before we
read Options. Checking earlier avoids a race in the command tests.

Fixes golang/go#36699.

Change-Id: I557c0441d70c80e122655be00a03b47080ddb7f6
Reviewed-on: https://go-review.googlesource.com/c/tools/+/216844
Run-TryBot: Heschi Kreinick <heschi@google.com>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: Rebecca Stambler <rstambler@golang.org>
2020-01-29 21:19:39 +00:00
Rebecca Stambler
ae42f3cd5c internal/lsp: recover from a view initialization failure
If an orphaned file is used to recover a workspace package, we should
remove the initialization error and treat the view as correctly
initialized.

Also, stop caching metadata for packages with no files. We have no way
to invalidate it, and it's useless, so just re-load those files as
needed.

Fixes golang/go#36795.
Fixes golang/go#36671.
Fixes golang/go#36772.

Change-Id: I0aee5a43401517b6073d27136cca533160effef2
Reviewed-on: https://go-review.googlesource.com/c/tools/+/216637
Run-TryBot: Rebecca Stambler <rstambler@golang.org>
Reviewed-by: Heschi Kreinick <heschi@google.com>
TryBot-Result: Gobot Gobot <gobot@golang.org>
2020-01-28 22:02:46 +00:00
Rohan Challa
dd312ab63b internal/lsp: surface missing dependencies for imports not in go.mod
This change sets up the infrastructure to surface the dependencies that are missing in a go.mod file. In a follow up CL, we will use these to add diagnostics to the imports of .go files telling the user to add the dependency to their go.mod file.

Updates golang/go#31999

Change-Id: I697df0d7c6eabfdc2f0c75cb36aa35794647fd13
Reviewed-on: https://go-review.googlesource.com/c/tools/+/214700
Reviewed-by: Rebecca Stambler <rstambler@golang.org>
Run-TryBot: Rohan Challa <rohan@golang.org>
TryBot-Result: Gobot Gobot <gobot@golang.org>
2020-01-27 22:30:17 +00:00
Rebecca Stambler
7736277c76 internal/lsp: remove shadow analysis from default suite
Mostly because I find it very annoying.
But I imagine lots of people shadow variables intentionally, and it's
very noisy.

Also, fix an error caught by the nilness check while I'm thinkng about
analyses.

Change-Id: I1867c8613194028815666efd879899bb5065c9d7
Reviewed-on: https://go-review.googlesource.com/c/tools/+/216541
Run-TryBot: Rebecca Stambler <rstambler@golang.org>
Reviewed-by: Michael Matloob <matloob@golang.org>
TryBot-Result: Gobot Gobot <gobot@golang.org>
2020-01-27 21:40:33 +00:00
Rebecca Stambler
ed30b9180d internal/lsp: don't show list errors unless necessary
The go/packages workaround to hide errors for overlay packages doesn't
seem to work well. It's easier to just hide list errors in gopls
diagnostics unless the package genuinely failed to type-check. Check if
the package has missing dependencies as an approximation of if it is
well-typed.

This required some additional special casing for the import cycle error
detection, which now causes them to have duplicate diagnostics. It's a
rare enough case that this doesn't concern me, but we should clean this
up at some point.

Fixes golang/go#36754.

Change-Id: If12c92fb9a0e0b69b711ae9a509ecb1b2a32255c
Reviewed-on: https://go-review.googlesource.com/c/tools/+/216310
Run-TryBot: Rebecca Stambler <rstambler@golang.org>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: Heschi Kreinick <heschi@google.com>
2020-01-27 19:59:09 +00:00
Rebecca Stambler
ab094738a9 internal/lsp: fix active parameter for incomplete parentheses
I had originally thought I might be able to use exprAtPos for this,
which is why I ended up eliminating that function when I saw it only had
one use.

One test also had to change in order to fit better with the spec.
Specifically: "If [the active parameter is] omitted or the value
lies outside the range of `signatures[activeSignature].parameters`
it defaults to 0 if the active signature has parameters."

Fixes golang/go#36766.

Change-Id: I400d5b2db2985bfaa5efbcd91225151ca8b5f46a
Reviewed-on: https://go-review.googlesource.com/c/tools/+/216309
Run-TryBot: Rebecca Stambler <rstambler@golang.org>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: Heschi Kreinick <heschi@google.com>
2020-01-27 19:24:44 +00:00
Michael Matloob
f3a16861ae internal/lsp/source: add more go/analysis/passes analyzers to LSP's suite
The LSP already supports a bunch of analyses we have less confidence in
than the vet suite so we should add these too.

Updates golang/go#36639

Change-Id: Ifc37d09e3acd73de021be7b45b3d80fe8c00e0d7
Reviewed-on: https://go-review.googlesource.com/c/tools/+/215677
Run-TryBot: Michael Matloob <matloob@golang.org>
Reviewed-by: Rebecca Stambler <rstambler@golang.org>
TryBot-Result: Gobot Gobot <gobot@golang.org>
2020-01-27 19:05:40 +00:00
Rebecca Stambler
4320446551 internal/lsp: permit renaming symbols declared in other packages
Also, add a test for it.

Fixes golang/go#36743

Change-Id: I750ea36189a4ec5c9dc8553e4739b0238c2b29c8
Reviewed-on: https://go-review.googlesource.com/c/tools/+/216306
Run-TryBot: Rebecca Stambler <rstambler@golang.org>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: Heschi Kreinick <heschi@google.com>
2020-01-27 18:56:10 +00:00
Rebecca Stambler
bcecb1fcc1 internal/lsp: return context cancellation from LookupBuiltin
Change-Id: If90d111fbe89d2be445b15ec3721d48280540de9
Reviewed-on: https://go-review.googlesource.com/c/tools/+/216305
Run-TryBot: Rebecca Stambler <rstambler@golang.org>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: Heschi Kreinick <heschi@google.com>
2020-01-27 18:55:29 +00:00
Rebecca Stambler
bdfa187a52 internal/lsp: remove the checkErrors command in internal/lsp/source
Now that the view can report its own validity, we no longer need to have
an extra function to handle that.

Change-Id: Icd22f9b08601bd0fe18be064c43d21be2d6782e7
Reviewed-on: https://go-review.googlesource.com/c/tools/+/216144
Run-TryBot: Rebecca Stambler <rstambler@golang.org>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: Heschi Kreinick <heschi@google.com>
2020-01-24 21:19:55 +00:00
Rebecca Stambler
e0332898b9 internal/lsp: push more build-specific logic into the view
The view should really be able to determine if it's valid, not the
source package. Expand moduleInformation to be buildInfo, and use it to
collect additional details.

Use this information to determine if we should load a view's
subdirectories as part of the initial workspace load. If a module is
initialized, we will recreate the view, so we should be fine. Not sure
what will happen if the directory is moved into GOPATH, but that should
be less of a concern (I think).

Fixes golang/go#35818.

Change-Id: Ic8ceedd37386b1653b8965c64d9ba8953778ab78
Reviewed-on: https://go-review.googlesource.com/c/tools/+/216143
Run-TryBot: Rebecca Stambler <rstambler@golang.org>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: Heschi Kreinick <heschi@google.com>
2020-01-24 21:10:25 +00:00
Rebecca Stambler
1b668f2091 internal/lsp: disable literal completion candidates for some clients
If a client doesn't support the snippet format in completion insert
text, they can't take full advantage of the literal completion
candidates. Disable it in those cases, and remove the setting in
internal/lsp/source/options.go.

Fixes golang/go#36655.

Change-Id: Ibc045a0f2945aab753b0187194a03d0c0398dba5
Reviewed-on: https://go-review.googlesource.com/c/tools/+/216299
Run-TryBot: Rebecca Stambler <rstambler@golang.org>
Reviewed-by: Heschi Kreinick <heschi@google.com>
2020-01-24 20:07:20 +00:00
Rebecca Stambler
24841a4f5f internal/lsp: eliminate redundant view.ModFile function
view.ModFiles used to not return the real mod file, even if one existed.
Now, we construct view.moduleInformation even if -modfile isn't
supported.

Change-Id: I03faf2ea521c2f404d4e1ba47f71ae48f3cb08d9
Reviewed-on: https://go-review.googlesource.com/c/tools/+/216138
Run-TryBot: Rebecca Stambler <rstambler@golang.org>
Reviewed-by: Rohan Challa <rohan@golang.org>
2020-01-23 22:07:07 +00:00
Rebecca Stambler
59ae353e8e internal/lsp: recreate the view when needed
If the initial workspace load fails (due to a lack of a go.mod file or
an invalid go.mod file), we should try to re-load as changes to the
go.mod come in. Rather than retrying within the view, we just drop the
view entirely and try to recreate it. This shouldn't lead to any
noticeable lag, as anything that has been cached can still be reused.

Fixes golang/go#36531

Change-Id: I6e157075e8b3665f0ceef35e051e56ac3c29f286
Reviewed-on: https://go-review.googlesource.com/c/tools/+/216037
Run-TryBot: Rebecca Stambler <rstambler@golang.org>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: Heschi Kreinick <heschi@google.com>
2020-01-23 21:53:29 +00:00
Rebecca Stambler
219d3418f5 internal/lsp: batch file changes in didChangeWatchedFiles
Remove the special handling for go.mod file saves. This was only really
added to be extra careful, but our cancellation logic should cope with
this.

Fixes golang/go#31553

Change-Id: I0a69bcdeaf6369697e79aba4689a7b714484ccc2
Reviewed-on: https://go-review.googlesource.com/c/tools/+/215908
Run-TryBot: Rebecca Stambler <rstambler@golang.org>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: Heschi Kreinick <heschi@google.com>
2020-01-23 20:51:52 +00:00
Rebecca Stambler
e54d0edf47 internal/lsp: support batched on-disk changes in source.DidModifyFiles
We don't yet propagate these batched changes in text_synchronization.go,
but this is the next step in moving towards a batched approach.

Updates golang/go#31553

Change-Id: Id6496af9d5422cc50ccb995f81c71ec1886f965a
Reviewed-on: https://go-review.googlesource.com/c/tools/+/215907
Run-TryBot: Rebecca Stambler <rstambler@golang.org>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: Heschi Kreinick <heschi@google.com>
2020-01-23 20:28:28 +00:00
Rohan Challa
0043dadf92 internal/lsp: use x/mod to get edits for go.mod quick fixes
This change uses the wonderful functions from x/mod to get the proper edits for the quick fixes on a go.mod diagnostic. It also creates a goModData structure to hold the data thats gets passed into the various parse functions, this will help reduce the large function prototypes that can occur when we decompose the logic. It also refactors the Modfiles() function to return span.URIs vs FileHandles.

Change-Id: Ifa0896442650f2ddbd8fe98d8f231a9e94c3d042
Reviewed-on: https://go-review.googlesource.com/c/tools/+/215097
Run-TryBot: Rohan Challa <rohan@golang.org>
Reviewed-by: Rebecca Stambler <rstambler@golang.org>
TryBot-Result: Gobot Gobot <gobot@golang.org>
2020-01-23 20:18:34 +00:00
Rebecca Stambler
ba161d9e22 internal/lsp: add tests for references includeDeclaration setting
Make sure to test both modes, as this is the second time we've
accidentally broken this.

Fixes golang/go#36598.

Change-Id: I3993af3d106b18c76c44ada558b2c6cd9cbfcf17
Reviewed-on: https://go-review.googlesource.com/c/tools/+/215777
Run-TryBot: Rebecca Stambler <rstambler@golang.org>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: Heschi Kreinick <heschi@google.com>
2020-01-23 01:39:50 +00:00
Muir Manders
9bae6688e3 internal/lsp/source: support dereferencing for completion
In cases like:

    var j *int
    var i int = <>

We will now provide "*j" as a completion candidate.

Change-Id: I1d35c2dca4864f13f7534e15b17450d784985557
Reviewed-on: https://go-review.googlesource.com/c/tools/+/215358
Run-TryBot: Muir Manders <muir@mnd.rs>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: Rebecca Stambler <rstambler@golang.org>
2020-01-22 21:43:17 +00:00
Rob Findley
78d067421b internal/lsp: remove the Context argument from NewSession
The passed-in Context is not used, and creates the illusion of a startup
dependency problem: existing code is careful to pass in the context
containing the correct Client instance.

This allows passing in a source.Session, rather than a source.Cache,
into lsp server constructors.

Updates golang/go#34111

Change-Id: I081ad6fa800b846b63e04d7164577e3a32966704
Reviewed-on: https://go-review.googlesource.com/c/tools/+/215740
Run-TryBot: Robert Findley <rfindley@google.com>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: Rebecca Stambler <rstambler@golang.org>
Reviewed-by: Ian Cottrell <iancottrell@google.com>
2020-01-21 23:07:03 +00:00
Muir Manders
3e306b7b28 internal/lsp/source: rename "typeInference" to "candidateInference"
This is in preparation for inferring stuff beyond just the expected
candidate type.

Change-Id: I31be9c1e4c82d82b1ff848858042a5edf46594e3
Reviewed-on: https://go-review.googlesource.com/c/tools/+/215340
Run-TryBot: Muir Manders <muir@mnd.rs>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: Rebecca Stambler <rstambler@golang.org>
2020-01-21 20:43:48 +00:00
Rebecca Stambler
62545537a9 internal/lsp: use correct file identities when computing diagnostics
CL 214586 switched to using URIs in error messages instead of file
identities. It wasn't fully correct because the reports were being
allocated for the file identities in the package handle (which may be
outdated).

Fixes golang/go#36601

Change-Id: I4fcfc02df74d94fff49540c784ef816c357e7232
Reviewed-on: https://go-review.googlesource.com/c/tools/+/215680
Run-TryBot: Rebecca Stambler <rstambler@golang.org>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: Heschi Kreinick <heschi@google.com>
2020-01-21 20:00:43 +00:00
Rohan Challa
bd79bb77d6 internal/lsp/cache: create infra for caching go.mod diagnostics
This change creates the infrastructure for caching diagnostics. Right now it uses a naive key of the entire snapshot which does not really add any benefit from using the cache. It also moves some code from inside the internal/lsp/mod to internal/lsp/cache.

Updates golang/go#31999

Change-Id: I599ad281baa062448d33ca0ea88ae6e09e10d73e
Reviewed-on: https://go-review.googlesource.com/c/tools/+/215021
Run-TryBot: Rohan Challa <rohan@golang.org>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: Rebecca Stambler <rstambler@golang.org>
2020-01-21 19:43:28 +00:00
Iskander Sharipov
dbc83e6dc0 internal/lsp/source: fix typeIsValid() inf recursion
typeIsValid() intended to stop on a named type, but
since we called Underlying(), switch case never caught any
named type. To avoid that, do an early check.

Fixes golang/go#36637

Change-Id: I2700afbb8f9678b4542e2e7dccc3be59b1d9ebdf
Reviewed-on: https://go-review.googlesource.com/c/tools/+/215238
Run-TryBot: Rebecca Stambler <rstambler@golang.org>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: Rebecca Stambler <rstambler@golang.org>
2020-01-21 04:27:40 +00:00
Heschi Kreinick
0cba7a3a9e internal/lsp/source: enable unimported completions by default
Fixes golang/go#31906.

Change-Id: I626ff1fe94a171d2280d9deeb4578b5abc759913
Reviewed-on: https://go-review.googlesource.com/c/tools/+/214947
Run-TryBot: Heschi Kreinick <heschi@google.com>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: Rebecca Stambler <rstambler@golang.org>
2020-01-17 22:05:05 +00:00
Heschi Kreinick
fe56e63357 internal/lsp/source: fix ranking of untyped completions
Claiming that untyped candidates matched the type of whatever we were
looking for messed up rankings in found(). The only other places that
use it will all work better with false. Return false.

Updates golang/go#36591.

Change-Id: I5e1e8af7cc5c27422740cbb77f9a4a20edb1e447
Reviewed-on: https://go-review.googlesource.com/c/tools/+/215322
Reviewed-by: Rebecca Stambler <rstambler@golang.org>
2020-01-17 21:50:04 +00:00
Rebecca Stambler
1486df0b25 internal/lsp: do not invoke the Go command when checking common errors
There's no need to do this more than once per view.

Change-Id: I3160adc602764204155dd0e506fd554aeb55d639
Reviewed-on: https://go-review.googlesource.com/c/tools/+/215321
Run-TryBot: Rebecca Stambler <rstambler@golang.org>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: Heschi Kreinick <heschi@google.com>
2020-01-17 21:23:25 +00:00
Heschi Kreinick
95ece921ff internal/lsp/source: trim file very carefully
Apparently the AST will sometimes give us offsets past the end of the
file. Don't crash when it does.

Fixes golang/go#36610.

Change-Id: I3cfbf8645bfcea94a5d87bca5bef4236d657b2c0
Reviewed-on: https://go-review.googlesource.com/c/tools/+/215119
Run-TryBot: Heschi Kreinick <heschi@google.com>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: Rebecca Stambler <rstambler@golang.org>
2020-01-17 20:34:13 +00:00
Muir Manders
a20955124b internal/lsp: consolidate completion sorting
Move completion candidate sorting into internal/lsp/source so
source_test.go and internal/lsp don't have to duplicate the logic.

Change-Id: Ifbe7ca5ad6a5b74020fd1260b4d4f775709968cf
Reviewed-on: https://go-review.googlesource.com/c/tools/+/215137
Reviewed-by: Rebecca Stambler <rstambler@golang.org>
Run-TryBot: Rebecca Stambler <rstambler@golang.org>
TryBot-Result: Gobot Gobot <gobot@golang.org>
2020-01-17 20:30:43 +00:00
Rohan Challa
ade7f2547e internal/lsp: add highlighting for import statement
This change adds highlights for imports when the cursor is over the use of that import. It also adds it for the opposite direction when the cursor is on the import, it will highlight uses of that import.

Fixes golang/go#36590

Change-Id: Ifd04d81ec9b4fdf2be1b763f31b44d0ef7d92f47
Reviewed-on: https://go-review.googlesource.com/c/tools/+/215258
Reviewed-by: Rebecca Stambler <rstambler@golang.org>
Run-TryBot: Rohan Challa <rohan@golang.org>
TryBot-Result: Gobot Gobot <gobot@golang.org>
2020-01-17 17:07:20 +00:00
Heschi Kreinick
6edc0a871e internal/lsp/source: score in-memory unimported candidates
We were assuming that all in-memory packages were equally useful. That's
not true for projects with a large dependency tree. Call into the
imports code to score them.

While I'm here, score the main module above direct deps.

Updates golang/go#36591.

Change-Id: I07c56dd3ff7338e76f3643e18d35abc1b52d6763
Reviewed-on: https://go-review.googlesource.com/c/tools/+/215023
Run-TryBot: Heschi Kreinick <heschi@google.com>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: Rebecca Stambler <rstambler@golang.org>
2020-01-17 01:23:04 +00:00
Muir Manders
0508ad4c83 internal/lsp/source: return obj decl first in find-references
Restore previous behavior where the object's declaration is returned
as the first reference in find-reference calls.

Fixes golang/go#36598.

Change-Id: Ibdeaf9971aa5cb1f3244f6a888fe77bdf386e563
Reviewed-on: https://go-review.googlesource.com/c/tools/+/215057
Run-TryBot: Muir Manders <muir@mnd.rs>
Reviewed-by: Rebecca Stambler <rstambler@golang.org>
TryBot-Result: Gobot Gobot <gobot@golang.org>
2020-01-16 16:57:51 +00:00
Muir Manders
473961ec04 internal/lsp/source: improve completion for "range" and "<-"
Now that we understand object "kind" for builtin generic functions, we
can apply it to a couple more places as well:

// prefer rangeable object kinds
for i := range <> {
}

// prefer channels
<- <>

Change-Id: If9cfba3a06b3abde073a9d397000bb3f3b0e9853
Reviewed-on: https://go-review.googlesource.com/c/tools/+/214678
Run-TryBot: Muir Manders <muir@mnd.rs>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: Rebecca Stambler <rstambler@golang.org>
2020-01-16 06:24:25 +00:00
Muir Manders
f80fb1dfa1 internal/lsp: refactor find-references and rename
The main goal is to push the package variant logic from internal/lsp
into internal/lsp/source so all users of internal/lsp/source benefit.

"references" and "rename" now have top-level source.References() and
source.Rename() entry points (as opposed to hanging off
source.Identifier()). I expanded objectsAtProtocolPos() to know about
implicit objects (type switch and import spec), and to
handle *ast.ImportSpec generically. This gets rid of special case
handling of *types.PkgName in various places.

The biggest practical benefit, though, is that "references" no longer
needs to compute the objectpath for every types.Object comparison it
does, instead using direct types.Object equality. This speeds up
"references" and "rename" a lot.

Two other notable improvements that fell out of not using
source.Identifier()'s logic:

- Finding references on an embedded field now shows references to the
  field, not the type being embedded.
- Finding references on an imported object now works
  correctly (previously it searched the importing package's dependents
  rather than the imported package's dependents).

Finally, I refactored findIdentifier() to use pathEnclosingObjNode()
instead of astutil.PathEnclosingInterval. Now we only need a single
call to get the path because pathEnclosingObjNode() has the
"try pos || try pos-1" logic built in.

Change-Id: I667be9bed6ad83912404b90257c5c1485b3a7025
Reviewed-on: https://go-review.googlesource.com/c/tools/+/211999
Run-TryBot: Muir Manders <muir@mnd.rs>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: Rebecca Stambler <rstambler@golang.org>
2020-01-16 06:24:15 +00:00
Heschi Kreinick
7042ee646e internal/lsp/source: always look up mapper when building ranges
Any file could have //line directives in it, which means that we should
never trust a mapper that was looked up for a whole file. Remove the
range conversion helpers that accepted a mapper and look it up on the
spot.

Change-Id: Ic518891fcc1a682b31cbc6d1d4e1e1af1ef21962
Reviewed-on: https://go-review.googlesource.com/c/tools/+/214949
Run-TryBot: Heschi Kreinick <heschi@google.com>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: Rebecca Stambler <rstambler@golang.org>
2020-01-16 01:10:02 +00:00
Muir Manders
49797d04a8 internal/lsp/source: improve completion in type assertions
In cases like:

var foo *someType = bar.(some<>)

We will now complete "some" to "*someType". This involved two changes:

1. Properly detect expected type as *someType in above example. To do
   this I just removed *ast.TypeAssertExpr from
   breaksExpectedTypeInference() so we continue searching up the AST for
   the expected type.

2. If the given type name T doesn't match, also try *T. If *T does
   match, we mark the candidate as "makePointer=true" so we know to
   prepend the "*" when formatting the candidate.

Change-Id: I05859c68082a798141755b614673a1483d864e3e
Reviewed-on: https://go-review.googlesource.com/c/tools/+/212717
Run-TryBot: Muir Manders <muir@mnd.rs>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: Rebecca Stambler <rstambler@golang.org>
2020-01-16 01:06:23 +00:00
Rebecca Stambler
96555e0fa5 internal/lsp/cache: initialize view before LookupBuiltin
This will crash otherwise.

Change-Id: I4fbce813283291792ed21fa5d83186ec59543ff1
Reviewed-on: https://go-review.googlesource.com/c/tools/+/214948
Run-TryBot: Rebecca Stambler <rstambler@golang.org>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: Heschi Kreinick <heschi@google.com>
2020-01-16 00:42:58 +00:00
Rebecca Stambler
a7dab0268b internal/lsp: diagnose the snapshot on every text synchronization event
This change moves to our ultimate approach of diagnostics the snapshot
on every file change, instead of carefully picking which files and
packages to diagnose. Analyses are shown for packages whose files are
open in the editor. Reverse dependencies are no longer needed for
source.Diagnostics because they will be invalidated when the snapshot is
cloned, so diagnosing the entire snapshot will bring them up to date.

This even works for go.mod files because all of workspace-level `go list`s
will be canceled as the user types, and then we trigger an uncancellable
go/packages.Load when the user saves. There is still room for improvement
here, but it will require much more careful invalidation of metadata for
go.mod files.

Change-Id: Id068505634b5e701c6f861a61b09a4c6704c565f
Reviewed-on: https://go-review.googlesource.com/c/tools/+/214419
Run-TryBot: Rebecca Stambler <rstambler@golang.org>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: Heschi Kreinick <heschi@google.com>
2020-01-15 23:07:48 +00:00
Rob Findley
df87866820 internal/lsp,internal/telemetry: correct stale docstrings
Several docstrings reference earlier names for the symbols they
document. This CL corrects those that I noticed while reading the lsp
code.

Change-Id: I1968459feff7011e070333c99eb149e72d3302de
Reviewed-on: https://go-review.googlesource.com/c/tools/+/214801
Reviewed-by: Rebecca Stambler <rstambler@golang.org>
2020-01-15 14:25:42 +00:00
Rebecca Stambler
831fdb1e18 internal/lsp: push initialization tasks into one function
This change moves as much view initialization code into the
initialization function, instead of having it happen on view create.
Also, the `go env` variables that are collected at inconsistent times
are all collected on view creation. That is sufficient, since the view
is recreated if the environment changes.

I had originally hoped that the initial call to `go env` and the
-modfile detection could become part of this parallel initialization as
well, but you can't create a *packages.Config until the temporary
modfile has been set up, so it still makes sense to do that on view
create. This is, however, the reasoning behind the refactorings in
the -modfile detection in this CL. The main changes are a few renamings
and a split between snapshot.ModFiles and view.modFiles to maximize the
amount of work done in the view. I changed view.modfiles to moduleInformation
because I thought we might want to store additional information there at some
point. Rohan, please let me know if you disagree with any of the changes I made,
and I can revert them.

Fixes golang/go#36487

Change-Id: I504db5a4f41b79bee99ebd391e32e7b520a19569
Reviewed-on: https://go-review.googlesource.com/c/tools/+/214417
Run-TryBot: Rebecca Stambler <rstambler@golang.org>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: Rohan Challa <rohan@golang.org>
2020-01-15 04:46:56 +00:00
Rob Findley
7ae403b6b5 internal/lsp: finish renaming CheckPackageHandle to PackageHandle
In golang.org/cl/209419, CheckPackageHandle was renamed to
PackageHandle, but a number of references to CheckPackageHandle remained
in function names and comments.

This CL cleans up most of these, though there was at least one case
(internal/lsp/cache.checkPackageKey) where the obvious renaming
conflicted with another function, so I skipped it.

Change-Id: I517324279ff05bd5b1cab4eeb212a0090ca3e3ad
Reviewed-on: https://go-review.googlesource.com/c/tools/+/214800
Reviewed-by: Rebecca Stambler <rstambler@golang.org>
Run-TryBot: Robert Findley <rfindley@google.com>
TryBot-Result: Gobot Gobot <gobot@golang.org>
2020-01-14 23:56:10 +00:00
Rebecca Stambler
f986e617de internal/lsp: make sure diagnostics with analyses are not overwritten
The initial workspace load does not send analyses with diagnostics, but
subsequent diagnostic requests do. If we've already sent diagnostics
with analysis for a file at a given version and snapshot, do not resend
diagnostics for the same file version with analyses.

Change-Id: I6979aa308e8846ff0cb66bd23e0dac488eae5446
Reviewed-on: https://go-review.googlesource.com/c/tools/+/214587
Run-TryBot: Rebecca Stambler <rstambler@golang.org>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: Heschi Kreinick <heschi@google.com>
2020-01-14 22:43:10 +00:00
Rohan Challa
579903b3ad internal/lsp: add mapper for go.mod files
This change adds a protocol.ColumnMapper when parsing go.mod files. This will prevent us from having to worry about line and column offsets, specifically when converting from the x/mod/modfile position to a span.Span.

Updates golang/go#31999

Change-Id: Iacdfb42d61dfea9b5f70325cf5a87c9575f8f345
Reviewed-on: https://go-review.googlesource.com/c/tools/+/214699
Run-TryBot: Rohan Challa <rohan@golang.org>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: Rebecca Stambler <rstambler@golang.org>
2020-01-14 22:04:35 +00:00
Rebecca Stambler
9c46c2c3da internal/lsp: fix flaking internal/lsp/cmd tests
Reloading metadata on demand fails for some our test packages,
because I don't understand how to construct arguments to commands.

Change-Id: Ib18454a09772e854a612528af898d06ce14133c2
Reviewed-on: https://go-review.googlesource.com/c/tools/+/214717
Run-TryBot: Rebecca Stambler <rstambler@golang.org>
Reviewed-by: Heschi Kreinick <heschi@google.com>
TryBot-Result: Gobot Gobot <gobot@golang.org>
2020-01-14 21:42:16 +00:00
Rebecca Stambler
189207f339 internal/lsp: use URIs instead of FileIdentity in errors
This change modifies the source.Error type to have a URI instead of a
FileIdentity associated with an error.

Change-Id: I8056bdc881dd3ec43af02cca1366815c0bc6dfcd
Reviewed-on: https://go-review.googlesource.com/c/tools/+/214586
Run-TryBot: Rebecca Stambler <rstambler@golang.org>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: Heschi Kreinick <heschi@google.com>
2020-01-14 19:14:11 +00:00
Muir Manders
d31a08c2ed internal/lsp/source: improve completion support for args to builtins
We now understand what "kind" of type is expected when using various
builtins. For example, when completing "close(<>)" we prefer channels,
and when completing "delete(<>)" we prefer maps.

I also added some code to infer the expected type for the second
argument to "delete()" and for the args to "copy()":

delete(map[someType]int{}, <>) // expect "someType"

copy([]int{}, <>) // expect "[]int"
copy(<>, []int{}) // expect "[]int"

And I marked "new()" as expected a type name, and it infers the type
name properly:

var _ *int = new(<>) // expected type at "<>" is "int"

Fixes golang/go#36326.

Change-Id: I4295c8753f8341d47010a0553fd2d0c2586f2efa
Reviewed-on: https://go-review.googlesource.com/c/tools/+/212957
Run-TryBot: Muir Manders <muir@mnd.rs>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: Rebecca Stambler <rstambler@golang.org>
2020-01-14 05:24:53 +00:00
Rebecca Stambler
3b9e235283 internal/lsp: fix context cancellation
Change-Id: Ib932722b0e66910b8cd23031e756f16099ee82dc
Reviewed-on: https://go-review.googlesource.com/c/tools/+/214581
Run-TryBot: Rebecca Stambler <rstambler@golang.org>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: Heschi Kreinick <heschi@google.com>
2020-01-14 01:26:48 +00:00
Rebecca Stambler
5a294e27f3 internal/lsp: allow subdirectories of module roots when checking errors
Previously, we would surface a warning message if a user had a missing
dependency in a subdirectory of their module root. This is not
necessary, so do a better job checking for that case.

Change-Id: Ib6fcdcbf6ac191478b9bb1f5f8a55d154fd30b5a
Reviewed-on: https://go-review.googlesource.com/c/tools/+/214420
Run-TryBot: Rebecca Stambler <rstambler@golang.org>
Reviewed-by: Heschi Kreinick <heschi@google.com>
2020-01-14 00:24:04 +00:00
Rebecca Stambler
533f309ed4 internal/lsp: reload workspace package metadata on demand
This change removes functions from the snapshot that return package IDs.
We prefer PackageHandles, since getting PackageHandles in a granular
fashion is not effective and causes us to spawn many `go list`
processes. By only ever returning PackageHandles, we can batch metadata
reloads for workspace packages. This enables us to add a check to
confirm that the snapshot is in a good state before returning important
data, like reverse dependencies and workspace package handles.

Change-Id: Icffc8d8e0449864f207c15aa211e84cb158c163f
Reviewed-on: https://go-review.googlesource.com/c/tools/+/214383
Run-TryBot: Rebecca Stambler <rstambler@golang.org>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: Heschi Kreinick <heschi@google.com>
2020-01-13 20:10:07 +00:00
Rebecca Stambler
8f45075ebc internal/lsp: merge completion options into source.Options
This change flattens the completion options type into UserOptions and
DebuggingOptions, which will enable us to generate documentation for
these options more effectively. This results in some modifications in
the tests.

Additionally, the fuzzyMatching and caseSensitive boolean flags are
merged into one setting, matcher, which can be used to specify the type
of matcher that is used for completion. Other requests (notably
workspaceSymbols) may need to use a matcher in the future.

Change-Id: I185875e50351be4090c7a2b3340d40286dc9f4a0
Reviewed-on: https://go-review.googlesource.com/c/tools/+/212635
Run-TryBot: Rebecca Stambler <rstambler@golang.org>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: Heschi Kreinick <heschi@google.com>
2020-01-13 20:09:44 +00:00
Rebecca Stambler
6316571e2c internal/lsp: don't require type-checking for formatting
We had previously required a type-checked package for formatting
requests, in order to determine if the package contained any parse
errors. We can get this information directly from the ParseGoHandle, so
there is no need to check the package. This will prevent `go list`
errors from making their way into formatting requests, for which a `go
list` really is not needed.

Updates golang/go#36511

Change-Id: I297f8880367e800d2343f468535efa80d2937071
Reviewed-on: https://go-review.googlesource.com/c/tools/+/214421
Run-TryBot: Rebecca Stambler <rstambler@golang.org>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: Heschi Kreinick <heschi@google.com>
2020-01-13 19:43:37 +00:00
Rebecca Stambler
86d412b4c6 internal/lsp: fix support for watching changed files
This is the beginning of the CLs to refactor the file watching code with
the normal text synchronization code. This hasn't yet been tested other
than with some minimal local testing, so follow-up CLs will be needed.

Updates golang/go#31553

Change-Id: Id081ecc59dd2903057164171bd95f0dc07baa5f1
Reviewed-on: https://go-review.googlesource.com/c/tools/+/214277
Run-TryBot: Rebecca Stambler <rstambler@golang.org>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: Heschi Kreinick <heschi@google.com>
2020-01-13 19:19:55 +00:00
Rebecca Stambler
4a54ec1d38 internal/lsp: remove view.FindPosInPackage and view.FindMapperInPackage
There is no reason for these functions to live on the view. They make
more sense as unexported functions in internal/lsp/source.

Initially, I had to propagate contexts through a lot of functions in
internal/lsp/source, but instead I removed the unused contexts forom
snapshot.GetFile.

Change-Id: I8323419d0356feb2010091fe8d3ed35e511f801a
Reviewed-on: https://go-review.googlesource.com/c/tools/+/214384
Run-TryBot: Rebecca Stambler <rstambler@golang.org>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: Heschi Kreinick <heschi@google.com>
2020-01-13 18:51:11 +00:00
Rebecca Stambler
a7a6caa82a internal/lsp: initialize the view on creation
This change moves the initialization of the view into the view's
creation, instead of forcing the tests to call WorkspacePackageIDs to
initialize.

Change-Id: Iccea820ec268b1851d58821481d92c7a3d4772c3
Reviewed-on: https://go-review.googlesource.com/c/tools/+/214279
Run-TryBot: Rebecca Stambler <rstambler@golang.org>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: Heschi Kreinick <heschi@google.com>
2020-01-10 21:31:25 +00:00
Rebecca Stambler
a9a43c4726 internal/lsp: store workspace package IDs with package paths
A test variant for a package can only be reloaded by running go/packages
on the non-test variants import path with the -test flag. We need to
cache this import path in order to be able to reload a test package
on-demand.

Also, always ignore test main packages by detecting them in the
metadata.

Fixes golang/go#36473

Change-Id: I6e5a61c8e73689212303ae09fa3aed4a2ee8762a
Reviewed-on: https://go-review.googlesource.com/c/tools/+/213660
Run-TryBot: Rebecca Stambler <rstambler@golang.org>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: Heschi Kreinick <heschi@google.com>
2020-01-09 22:04:34 +00:00
Rebecca Stambler
8a1a3df092 internal/lsp: allow diagnostics to be computed per-file or per-package
This change splits source.Diagnostics into source.FileDiagnostics and
source.PackageDiagnostics. There isn't much difference in functionality,
but this just simplifies the process of getting diagnostics if you only
have a PackageHandle.

Change-Id: I62c0de8778065a4c46cc5672e2834ce5c63fe012
Reviewed-on: https://go-review.googlesource.com/c/tools/+/213644
Run-TryBot: Rebecca Stambler <rstambler@golang.org>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: Heschi Kreinick <heschi@google.com>
2020-01-09 21:49:23 +00:00
Rebecca Stambler
700ee2612c internal/lsp: propagate errors from find references
We were ignoring errors in a few cases and returning incorrect errors in
the case of the command-line interface (no identifier found when there
were just no references). I think it is better for references to return
an error than incomplete results.

Change-Id: Id90bca58ebdd9f6a910853cb4ac5b6ab6bec57f8
Reviewed-on: https://go-review.googlesource.com/c/tools/+/213817
Run-TryBot: Rebecca Stambler <rstambler@golang.org>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: Heschi Kreinick <heschi@google.com>
2020-01-09 21:23:09 +00:00