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Commit Graph

306 Commits

Author SHA1 Message Date
Rebecca Stambler
2840dafb9e Revert "internal/lsp: hide analysis diagnostics from generated files"
This reverts commit e4881b2459.

Reason for revert: <CL 230999 has a different approach to this>

Change-Id: I9ec47d858e7db2a66ec8a93063ab950b8553e45b
Reviewed-on: https://go-review.googlesource.com/c/tools/+/231042
Run-TryBot: Rebecca Stambler <rstambler@golang.org>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: Heschi Kreinick <heschi@google.com>
2020-04-30 19:28:56 +00:00
Rebecca Stambler
b8428586f4 internal/lsp: handle hover documentation for package declarations
We had previously not been generating documentation on hover for
package declarations or import specs. We do this by adding a few special
cases, since package declarations don't appear in type information.

Throughout, we make the assumption that only one file in a package will
have the documentation for the package. go/doc just appends
documentation as it sees it. We may be able to do better by checking for
a "Package ..." but that still is not guaranteed. Not sure what the
right approach is, so this assumption may be the best option.

Fixes golang/go#38526

Change-Id: Ibc515f8729e1aba0d11090be62371be6b18d0cfa
Reviewed-on: https://go-review.googlesource.com/c/tools/+/230417
Run-TryBot: Rebecca Stambler <rstambler@golang.org>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: Heschi Kreinick <heschi@google.com>
2020-04-29 20:57:41 +00:00
Rebecca Stambler
e4881b2459 internal/lsp: hide analysis diagnostics from generated files
Don't show non-vet analyses when they appear in generated files. Vet
analyzers will give useful reports even in generated files.

Fixes golang/go#38467

Change-Id: I0e628760b386553932de4cf1f5ba39784a205b53
Reviewed-on: https://go-review.googlesource.com/c/tools/+/230597
Run-TryBot: Rebecca Stambler <rstambler@golang.org>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: Heschi Kreinick <heschi@google.com>
2020-04-29 20:34:34 +00:00
Rebecca Stambler
352a5409fa internal/lsp: handle different package names in signature help
There were a few cases where we were not properly qualifying package
names, particularly if the original package had a named import. Now,
we map between these names correctly - handling the case of multiple
packages that need to be qualified. This requires applying edits to
*ast.SelectorExprs, as well as *ast.Idents.

We still do not fully qualify unimported packages, and likely won't,
unless that's an issue for many users.

Updates golang/go#38591

Change-Id: I966a4d1f936f37ede89362d03da3ff98d8952a06
Reviewed-on: https://go-review.googlesource.com/c/tools/+/229979
Run-TryBot: Rebecca Stambler <rstambler@golang.org>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: Heschi Kreinick <heschi@google.com>
2020-04-27 20:59:12 +00:00
Rebecca Stambler
e0d5eebdf8 internal/lsp: fix docs on hover for ungrouped package variables
Fixes golang/go#38525

Change-Id: I8833c925663b67b2c82ad4cbf580d1c6f3c7a81d
Reviewed-on: https://go-review.googlesource.com/c/tools/+/230305
Run-TryBot: Rebecca Stambler <rstambler@golang.org>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: Heschi Kreinick <heschi@google.com>
2020-04-27 18:59:06 +00:00
Muir Manders
8463f397d0 internal/lsp/source: fix false positive "..." in completions
In cases like:

    var v interface{}
    fmt.Println(<>)

Completing to "v" would insert "v..." instead of "v". This was due to
a mixup where we were checking if the variadic type "[]interface{}"
was assignable to the candidate type "interface{}" instead of the
other way around.

Fixes golang/go#38652.

Change-Id: I27c0b50bbf4b895924c8ed2c0c9dd6785e98cbe1
Reviewed-on: https://go-review.googlesource.com/c/tools/+/229921
Run-TryBot: Muir Manders <muir@mnd.rs>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: Rebecca Stambler <rstambler@golang.org>
2020-04-25 04:34:58 +00:00
Rebecca Stambler
59e73619c7 internal/lsp: correctly handle type aliases when formatting
This change improves our approach to handling type aliases. Previously,
we were not fully qualifying the names in the AST, making the code
inserted in completions incorrect at times. Now, we clone the relevant
AST expr and qualify it. We also add handling for the return values of a
function, instead of just the parameters.

Fixes golang/go#38230
Fixes golang/go#37283

Change-Id: Ib79f4636891c9b610ae848e9fa4dbae7c63db509
Reviewed-on: https://go-review.googlesource.com/c/tools/+/229319
Run-TryBot: Rebecca Stambler <rstambler@golang.org>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: Heschi Kreinick <heschi@google.com>
2020-04-23 20:53:58 +00:00
Rebecca Stambler
72e4a01eba internal/lsp: refactor code for formatting signatures
The code for formatting function signatures is fairly confusing.
Factoring out an unexported signature type simplifies things a bit.
Hopefully we'll be able to pull out more formatting logic from the other
features. Ideally, I'd like to return to the separation between
internal/lsp/source and internal/lsp so that a formatting package can be
pulled out and used in internal/lsp.

Change-Id: I7428db5004eab371e46402188e0dc6bb30f0c425
Reviewed-on: https://go-review.googlesource.com/c/tools/+/229318
Run-TryBot: Rebecca Stambler <rstambler@golang.org>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: Heschi Kreinick <heschi@google.com>
2020-04-22 20:52:58 +00:00
Paul Jolly
cfa8b22178 go/packages/packagestest: do not walk packages and their test variants
Currently, where a package has a test variant, we end up walking the
non-_test.go files twice: once when walking the package itself, the
second time when walking the test variant. In the gopls tests, this
means we end up double-counting the number of symbols (via the @symbol
annotation) in a package.

Extend the existing expect_test.go to demonstrate the problem is fixed
(a test which fails when the fix is not in place)

Change-Id: Ifd68b3d86e24f19d3f8efc3af71494b7d28b0acb
Reviewed-on: https://go-review.googlesource.com/c/tools/+/228761
Reviewed-by: Rebecca Stambler <rstambler@golang.org>
2020-04-21 04:27:24 +00:00
Paul Jolly
b4d5569d26 internal/lsp/tests: provide SymbolInformation.Name in @symbol annotations
In preparation for a later change where we alter the implementation of
the workspace Symbol method, we now specify the Name that should be used
when constructing a SymbolInformation value from a @symbol annocation.
There is no change in the test expectations.

Change-Id: I4ee5f714d6060aab2ee33ef18339504f443cecdc
Reviewed-on: https://go-review.googlesource.com/c/tools/+/228757
Reviewed-by: Rebecca Stambler <rstambler@golang.org>
2020-04-21 04:22:56 +00:00
Rebecca Stambler
5744cfde56 internal/lsp: fix imports issue with duplicate package decl
We shouldn't apply formatting fixes when we are
organizing imports.

Fixes golang/go#38412

Change-Id: I082f4d9a7d1d1dd571304733c287b0d5e90ea448
Reviewed-on: https://go-review.googlesource.com/c/tools/+/228264
Run-TryBot: Rebecca Stambler <rstambler@golang.org>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: Robert Findley <rfindley@google.com>
2020-04-16 06:17:24 +00:00
Rebecca Stambler
5d8e1897c7 internal/lsp: fix erroneous documentation for struct fields
The fix is just a missing return.
Also clean up a staticcheck thing, regenerate the golden files.

Fixes golang/go#38417

Change-Id: I290b63df9d97211c59d6399fda7a273bc700fbdb
Reviewed-on: https://go-review.googlesource.com/c/tools/+/228297
Run-TryBot: Rebecca Stambler <rstambler@golang.org>
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Reviewed-by: Robert Findley <rfindley@google.com>
2020-04-15 03:45:06 +00:00
Rebecca Stambler
4d14fc9c00 internal/lsp: add type error fixes to existing diagnostics
This change is the first step in handling golang/go#38136. Instead of
creating multiple diagnostic reports for type error analyzers, we add
suggested fixes to the existing reports. To match the analyzers for
FindAnalysisError, we add an ErrorMatch function to source.Analyzer.

This is not an ideal solution, but it was the best one I could come up
with without modifying the go/analysis API. analysisinternal could be
used for this purpose, but it seemed to complicated to be worth it, and
this is fairly simple. I think that go/analysis itself might need to be
extended for type error analyzers, but these temporary measures will
help us understand the kinds of features we need for type error
analyzers.

A follow-up CL might be to not add reports for type error analyzers
until the end of source.Diagnostic, which would remove the need for the
look-up.

Fixes golang/go#38136

Change-Id: I25bc6396b09d49facecd918bf5591d2d5bdf1b3a
Reviewed-on: https://go-review.googlesource.com/c/tools/+/226777
Run-TryBot: Rebecca Stambler <rstambler@golang.org>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: Heschi Kreinick <heschi@google.com>
2020-04-08 01:45:16 +00:00
Rebecca Stambler
226fa68e9d internal/lsp: fix references for transitive dependencies
We need to search all transitive dependencies of a package, not just its
immediate imports.

Fixes golang/go#38100

Change-Id: I15b4dbe226ba851691ca0c95460c3648ede32f04
Reviewed-on: https://go-review.googlesource.com/c/tools/+/227030
Run-TryBot: Rebecca Stambler <rstambler@golang.org>
Reviewed-by: Rohan Challa <rohan@golang.org>
2020-04-02 20:53:30 +00:00
Rebecca Stambler
9fc00b0a7f internal/lsp: fix panic in builtin completions
Fixes golang/go#38091

Change-Id: I88ac6d3413de3dd9d235e2f2fca9b4a3f7127e0a
Reviewed-on: https://go-review.googlesource.com/c/tools/+/227026
Run-TryBot: Rebecca Stambler <rstambler@golang.org>
Reviewed-by: Rohan Challa <rohan@golang.org>
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2020-04-02 17:53:26 +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
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
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
Daisuke Suzuki
d58d27dcbb tools/gopls: add cmd support for workspace_symbol
This change adds command line support for workspace/symbol.
Symbols are formatted as '{span} {name} {type}'.

$ gopls workspace_symbol -matcher fuzzy 'wsymbols'
$
$ workspacesymbol/a/a.go:5:7-31 WorkspaceSymbolConstantA Constant
$ workspacesymbol/b/b.go:5:6-28 WorkspaceSymbolStructB Struct

Optional arguments are:
-matcher, which specifies the type of matcher: fuzzy, caseSensitive, or caseInsensitive.
The default is caseInsensitive.

Updates golang/go#32875

Change-Id: Ieef443b13710f9c973210e58f66ab7679f258b30
Reviewed-on: https://go-review.googlesource.com/c/tools/+/224677
Run-TryBot: Rebecca Stambler <rstambler@golang.org>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: Rebecca Stambler <rstambler@golang.org>
2020-03-26 19:59:04 +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>
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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
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>
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Reviewed-by: Rebecca Stambler <rstambler@golang.org>
2020-03-18 05:47:22 +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>
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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>
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Reviewed-by: Rebecca Stambler <rstambler@golang.org>
2020-03-12 04:57:24 +00:00
Daisuke Suzuki
0d653b92c5 internal/lsp/tests: fix WorkspaceSymbols tests
The tests will not run because there is no workspacesymbol marker.
Therefore, restore testdata used in WorkspaceSymbols tests, and
initialize data so that the tests run even if the target of the marker
is 0.

Change-Id: I051b842183b7e23bb746cc282fc3921a90ca8df1
Reviewed-on: https://go-review.googlesource.com/c/tools/+/221617
Reviewed-by: Heschi Kreinick <heschi@google.com>
Run-TryBot: Heschi Kreinick <heschi@google.com>
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2020-03-11 18:46:36 +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>
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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
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2020-03-11 03:54:16 +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
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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
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2020-03-09 18:42:16 +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
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2020-03-08 01:33:38 +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>
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2020-03-06 14:31:35 +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>
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2020-03-03 19:47:17 +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
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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
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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
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2020-03-02 21:28:54 +00:00
Rebecca Stambler
eb7c56241b internal/lsp: remove unknown dependency from highlight tests
The highlight tests imported golang.org/x/tools/internal/lsp/protocol
package, which doesn't exist when the testdata is set up in the test
harness. This causes gopls to try to reload the metadata for the
package. I'm not sure why this wasn't an issue before, since we should
re-run go/packages.Load every time we have missing dependencies.

Fixes golang/go#37365

Change-Id: I8ebcbbf78b7e6fcdac9ab83bef3f5a0c9a50a361
Reviewed-on: https://go-review.googlesource.com/c/tools/+/221107
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Reviewed-by: Robert Findley <rfindley@google.com>
2020-02-26 20:52:01 +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
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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>
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2020-02-25 21:59:15 +00:00
Rebecca Stambler
df82bb964a internal/lsp: add a test for internal imports handling
I'm still not sure if we need to handle any other non-standard package
path apart from "command-line-arguments".

Also, a couple of staticcheck fixes.

Change-Id: I0bb3e60f6ffe104ff9027dbebb628020caaa1af4
Reviewed-on: https://go-review.googlesource.com/c/tools/+/220138
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2020-02-25 18:38:19 +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
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2020-02-24 18:12:40 +00:00
Pontus Leitzler
57f3fb51f5 gopls: update Staticcheck to 2020.1.2
This change updates Staticcheck to the newly released 2020.1.2.

Change-Id: I80606b9c993de2f504c0ca3ee68f695ec8bd50e9
Reviewed-on: https://go-review.googlesource.com/c/tools/+/220477
Run-TryBot: Robert Findley <rfindley@google.com>
Reviewed-by: Rebecca Stambler <rstambler@golang.org>
2020-02-21 19:17:10 +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
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2020-02-20 22:48:06 +00:00
Rohan Challa
88b1720de6 internal/lsp/tests: fix regexp for removing links that contain versions
This change fixes the regex that removes the versions for links so that tests will still run under GOPATH mode. It also removes a link for an import that needed to be downloaded.

Change-Id: I7ed4f500d1bd9d2136188d30952eedb8d8aee6e4
Reviewed-on: https://go-review.googlesource.com/c/tools/+/220140
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Reviewed-by: Rebecca Stambler <rstambler@golang.org>
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2020-02-19 22:25:53 +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
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2020-02-19 19:55:21 +00:00
Daisuke Suzuki
ca8c272a4d internal/lsp/tests: fix reset of golden files
internal/lsp/reset_golden.sh fails when golden file does not exist, so
skip loading the golden file on update.
Additionally, add the missing primarymod directory as the update
destination path so that golden files are placed under the primarymod
directory.
However, keep the location of summary.txt.golden in the same directory
as the primarymod directory.
As a result, some unnecessary data was deleted.

Change-Id: I98120c8b7d483174644600786fd30acdc2e4c52e
Reviewed-on: https://go-review.googlesource.com/c/tools/+/219577
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Reviewed-by: Rohan Challa <rohan@golang.org>
2020-02-19 14:42:13 +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
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Reviewed-by: Robert Findley <rfindley@google.com>
2020-02-14 18:12:26 +00:00
Muir Manders
c229649527 internal/lsp/cache: fix crash fixing curlies near EOF
We were crashing in cases like:

1:    func foo() {
2:     if b<> <EOF>

We were trying to get the line start position for line 3, but there is
no line 3. Fix by bailing out early if we are the last line in the
file because there is nothing to fix in that case.

Fixes golang/go#37226.

Change-Id: I4ad5746d7b55bdcc2de57c04e972c15a61084faa
Reviewed-on: https://go-review.googlesource.com/c/tools/+/219498
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Reviewed-by: Rebecca Stambler <rstambler@golang.org>
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2020-02-14 17:25:38 +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
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2020-02-14 14:15:08 +00:00