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Commit Graph

542 Commits

Author SHA1 Message Date
Heschi Kreinick
31b9a74881 internal/lsp/cache: handle missing mod file
If the config changes in non-module mode, don't look at the nonexistant mod file.

I actually caught this case after review but didn't finish the job.

Fixes golang/go#40121.

Change-Id: Ic888f7eab5f882e6ca79b046b5a3fb37b3b19e5c
Reviewed-on: https://go-review.googlesource.com/c/tools/+/241520
Run-TryBot: Heschi Kreinick <heschi@google.com>
Reviewed-by: Rebecca Stambler <rstambler@golang.org>
TryBot-Result: Gobot Gobot <gobot@golang.org>
2020-07-08 18:08:30 +00:00
Heschi Kreinick
065b96d36c internal/lsp/cache: fix race in RunProcessEnvFunc
Changing build flags (-modfile) while work is happening in the
background causes races. Explicitly detect relevant configuration
changes and only modify the ProcessEnv then, when the resolver is
inactive after the call to ClearForNewMod.

This still leaves a very small window for a race: if refreshProcessEnv
has already captured env but not yet started priming the cache, it may
race with the modification. But I don't expect it to be a problem in
practice.

Fixes golang/go#39865.

Change-Id: I31c79f39be55975fee14aa0e548b060c46cdd882
Reviewed-on: https://go-review.googlesource.com/c/tools/+/241317
Run-TryBot: Heschi Kreinick <heschi@google.com>
Reviewed-by: Rebecca Stambler <rstambler@golang.org>
2020-07-07 22:21:32 +00:00
Heschi Kreinick
416e8f4faf internal/imports: require valid options, move LocalPrefix up
CL 239754 eagerly initialized the environment. This turns out to be a
problem for gopls, which calls ApplyFixes with no ProcessEnv.
Reinitializing it every time seriously harmed the performance of
unimported completions. Move back to lazy initialization.

Working with invalid options has caused a lot of confusion; this is only
the most recent. We have to maintain backwards compatibility in the
externally visible API, but everywhere else we can require fully
populated options. That includes the source byte slice and the options.

LocalPrefix is really more of an Option than an attribute of the
ProcessEnv, and it is needed in ApplyFixes where we really don't want to
have to pass a ProcessEnv. Move it up to Options.

Change-Id: Ib9466c375a640a521721da4587091bf93bbdaa3c
Reviewed-on: https://go-review.googlesource.com/c/tools/+/241159
Run-TryBot: Heschi Kreinick <heschi@google.com>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: Rebecca Stambler <rstambler@golang.org>
2020-07-07 20:02:13 +00:00
Rebecca Stambler
682c4542fd all: update dependencies in go.mod file
CL 226639 changed the positions of the go.mod diagnostics (in a
negligible way), but the tests are quite brittle and can't handle the
different position. Rewrite this test as a regression test to handle it.

The special // indirect marker can be removed from the go/expect package
as a result, since it was only used in this one place.

Change-Id: I7d9a62e32e53d477838e65673635ed231c07b659
Reviewed-on: https://go-review.googlesource.com/c/tools/+/240691
Run-TryBot: Rebecca Stambler <rstambler@golang.org>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: Heschi Kreinick <heschi@google.com>
2020-07-06 23:19:48 +00:00
Rebecca Stambler
f01a4bec33 internal/lsp: support opening single files
This change permits starting gopls without a root URI or any workspace
folders. If no view is found for an opened file, we try to create a new
view based on the module root of that file. In GOPATH mode, we just
use the directory containing the file.

I wrote a regtest for this by adding a new configuration that gets
propagated to the sandbox. I'm not sure if this is the best way to do
that, so I'll let Rob advise.

Fixes golang/go#34160

Change-Id: I3deca3ac1b86b69eba416891a1c28fd35658a2ed
Reviewed-on: https://go-review.googlesource.com/c/tools/+/240099
Run-TryBot: Rebecca Stambler <rstambler@golang.org>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: Heschi Kreinick <heschi@google.com>
2020-07-01 22:10:12 +00:00
Muir Manders
1837592efa internal/lsp/source: speed up completion candidate formatting
Completion could be slow due to calls to astutil.PathEnclosingInterval
for every candidate during formatting. There were two reasons we
called PEI:

1. To properly render type alias names, we must refer to the AST
   because the alias name is not available in the typed world.
   Previously we would call PEI to find the *type.Var's
   corresponding *ast.Field, but now we have a PosToField cache that
   lets us jump straight from the types.Object's token.Pos to the
   corresponding *ast.Field.

2. To display an object's documentation we must refer to the AST. We
   need the object's declaring node and any containing ast.Decl. We
   now maintain a special PosToDecl cache so we can avoid the PEI call
   in this case as well.

We can't use a single cache for both because the *ast.Field's position
is present in both caches (but points to different nodes). The caches
are memoized to defer generation until they are needed and to save
work creating them if the *ast.Files haven't changed.

These changes speed up completing the fields of
github.com/aws/aws-sdk-go/service/ec2 from 18.5s to 45ms on my laptop.

Fixes golang/go#37450.

Change-Id: I25cc5ea39551db728a2348f346342ebebeddd049
Reviewed-on: https://go-review.googlesource.com/c/tools/+/221021
Run-TryBot: Muir Manders <muir@mnd.rs>
Reviewed-by: Rebecca Stambler <rstambler@golang.org>
2020-07-01 04:11:22 +00:00
Rebecca Stambler
4bdfe1a3b7 internal/lsp/cache: handle a few possible panics in PackageStats
Change-Id: I50dbe8bf7d801e7325bdbe413368e85779511d85
Reviewed-on: https://go-review.googlesource.com/c/tools/+/240183
Run-TryBot: Rebecca Stambler <rstambler@golang.org>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: Heschi Kreinick <heschi@google.com>
2020-06-30 15:45:28 +00:00
Rob Findley
aa94e735be internal/lsp/source: add a new symbolStyle configuration option
Add a symbolStyle configuration option, and use it to parameterize the
following behavior when computing workspace symbols:

 + package (default): include package name in the workspace symbol.
 + full: fully qualify the symbol by import path
 + dynamic: use as the symbol the shortest suffix of the full path that
   contains the match.

To implement this, expose package name in the source.Package interface.
To be consistent with other handling in the cache package, define a new
cache.packageName named string type, to avoid confusion with packageID
or packagePath (if confusing those two identifiers was a problem, surely
it is a potential problem for package name as well).

Change-Id: Ic8ed6ba5473b0523b97e677878e5e6bddfff10a7
Reviewed-on: https://go-review.googlesource.com/c/tools/+/236842
Run-TryBot: Robert Findley <rfindley@google.com>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: Paul Jolly <paul@myitcv.org.uk>
2020-06-26 17:13:37 +00:00
Rebecca Stambler
fadf93ffb2 internal/lsp: watch all files in the module and replace target
Previously, our file watching only considered the root directory of the
view, which may not include the entire module or its replaced
dependencies. Now we expand our watching to include the whole module.

As part of testing this, I noticed that VS Code's file watcher actually
only sends updates for files in the workspace, even if we request
notifications for all files in the module. I filed an issue to ask about
this: https://github.com/microsoft/vscode-languageserver-node/issues/641.

Change-Id: I9499d31aff273f69e9c117511e7985ff58b7fdc4
Reviewed-on: https://go-review.googlesource.com/c/tools/+/239198
Run-TryBot: Rebecca Stambler <rstambler@golang.org>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: Heschi Kreinick <heschi@google.com>
2020-06-25 21:08:52 +00:00
Heschi Kreinick
e31c80b82c all: rework goimports environment, support GOMODCACHE
This CL got away from me a little.

For a number of reasons, the existing goimports API of passing in values
for various GO* values was not working. For one, the number of necessary
variables kept growing. For another, we tried to avoid calling `go env`
in GOPATH mode by using `build.Default`, but that turns out to be buggy;
see golang/go#39838. And finally, it created massive confusion about
whether the values were intended to be read from the OS environment, or
fully evaluated by the `go` command.

There are only two users of the internal imports API, so there really
shouldn't need to be more than two modes. For the command line tool, we
have to call `go env` to deal with the `go/build` bug. So we just do it.
Tests use that same path, but can augment the enviroment to set
themselves up. In contrast, `gopls` needs to fully specify the
environment. It can simply pass in the fully evaluated GO* values.

Finally, make the change I was actually here to make: propagate
GOMODCACHE and use it where appropriate.

Fixes golang/go#39761.

Change-Id: I720c69839d91d66d98e94dfc5f065ba0279c5542
Reviewed-on: https://go-review.googlesource.com/c/tools/+/239754
Run-TryBot: Heschi Kreinick <heschi@google.com>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: Rebecca Stambler <rstambler@golang.org>
2020-06-25 17:33:20 +00:00
Rebecca Stambler
25775e59ac internal/memoize: add an error return to (*handle).Get
Fixes golang/go#36004

Change-Id: I8da7c21eaa9cf6ffac12aabdd6803d06781cef32
Reviewed-on: https://go-review.googlesource.com/c/tools/+/239564
Run-TryBot: Rebecca Stambler <rstambler@golang.org>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: Heschi Kreinick <heschi@google.com>
2020-06-24 16:33:19 +00:00
Rebecca Stambler
1745ac5bc6 internal/lsp: refactor various module-specific handles in cache
This change separates out different functions of mod handles.
Previously, we had ModHandle and ModTidyHandle. ModHandle was used to
parse go.mod files and get the results of `go mod why` and possible
dependency upgrades.

Now, we factor this out into 4 handles: ParseModHandle, ModWhyHandle,
ModUpgradeHandle, and ModTidyHandle. This allows each handle to be
specific to its own functionality. It also simplifies the code a bit,
as the handles can be written in terms of ParseModHandles instead of
FileHandles.

I may have some follow-up CLs to refactor the `go mod tidy` logic out of
the cache package, though I'm no longer certain that that's a good
choice.

Change-Id: I8e12299dfdda7bb61b05903d9aa474461d7f4836
Reviewed-on: https://go-review.googlesource.com/c/tools/+/239117
Run-TryBot: Rebecca Stambler <rstambler@golang.org>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: Heschi Kreinick <heschi@google.com>
2020-06-23 18:31:46 +00:00
Rebecca Stambler
20e05c1c8f internal/lsp: don't use -modfile for go mod commands
These are commands whose changes should be reflected in the existing
go.mod file, as they do not provide edits. Add a third way of running
the go command, explicitly without -modfile. Update the regression test
accordingly.

Change-Id: I866b5db83b504fae190e58c306c01a7a4296672d
Reviewed-on: https://go-review.googlesource.com/c/tools/+/239200
Run-TryBot: Rebecca Stambler <rstambler@golang.org>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: Heschi Kreinick <heschi@google.com>
2020-06-22 20:30:43 +00:00
Heschi Kreinick
4fd1c64487 internal/lsp/cache: fix ignored file check
The return of IgnoreFile. We continue using go list's ignore rules,
but only apply them to the part of the path underneath the source root.

This should be fixed to include replace targets once we have them.

Change-Id: I054fee8c12fc860a279b0d0c1fd670f44d78a63f
Reviewed-on: https://go-review.googlesource.com/c/tools/+/239288
Run-TryBot: Heschi Kreinick <heschi@google.com>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: Ian Cottrell <iancottrell@google.com>
2020-06-22 19:29:24 +00:00
Heschi Kreinick
8b7669898d internal/lsp/debug: save per-package stats in memory debug files
The per-package stats have proven pretty useful, and I don't want to
have to teach users how to save them. Create zip files and add them in.

Since some users may be sensitive about revealing any information about
the code, generate two variants: one with package names, and one
without.

Change-Id: Icc5631b4cebbbabfdd2fcea4a4cdf4f205dbcab9
Reviewed-on: https://go-review.googlesource.com/c/tools/+/239037
Run-TryBot: Heschi Kreinick <heschi@google.com>
Reviewed-by: Robert Findley <rfindley@google.com>
2020-06-19 18:00:37 +00:00
Rebecca Stambler
6023b8da91 internal/lsp: use -modfile for import organization
Also add a regression test.

Fixes golang/go#39681.

Change-Id: I685fbe4255b9e8e067dacd84a6d464d0a2bbe1f1
Reviewed-on: https://go-review.googlesource.com/c/tools/+/238737
Run-TryBot: Rebecca Stambler <rstambler@golang.org>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: Heschi Kreinick <heschi@google.com>
2020-06-19 17:44:56 +00:00
Rob Findley
20370b0cb4 internal/lsp: honor GOPRIVATE in documentLinks and go.mod hovers
Several fixes related to GOPRIVATE handling and links:
 + In Go source, fix links matching GOPRIVATE for external modules.
   Previously, in these cases we'd try to match <mod>@v1.2.3/<suffix>,
   which wasn't the correct input into the GOPRIVATE matching algorithm.
 + Similarly check GOPRIVATE for go.mod require statement hovers.
 + Likewise, for documentLink requests (both mod and source).
 + Move the existing hover regtest to link_test.go, and expand to cover
   all these cases.

Along the way, I encountered a couple apparent bugs, which I fixed:
 + Correctly handle the case where there is only one require in a go.mod
   file. This was exercised by the regtest, so took some debugging.
 + Only format links [like](this) if the requested format is actually
   markdown.

Fixes golang/go#36998

Change-Id: I92011821f646f2a7449dcca619483f83bdeb54b0
Reviewed-on: https://go-review.googlesource.com/c/tools/+/238029
Run-TryBot: Robert Findley <rfindley@google.com>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: Rebecca Stambler <rstambler@golang.org>
2020-06-18 13:42:42 +00:00
Rebecca Stambler
d15173dcc7 internal/lsp/cache: separate modTidyHandle out of modHandle
While working in this code, I was confused by the fact that modHandle
and modData were used for both ModHandle and ModTidyHandle. Separate out
the two so it's a little more clear. This is mostly a copy-paste, with a
few fields renamed to simplify them.

Change-Id: I20ea11c32a624fd250eabf901d09ebb05fbad062
Reviewed-on: https://go-review.googlesource.com/c/tools/+/238337
Run-TryBot: Rebecca Stambler <rstambler@golang.org>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: Heschi Kreinick <heschi@google.com>
2020-06-18 03:14:02 +00:00
Rebecca Stambler
47c907e258 internal/lsp: use a new temporary go.mod for every go list call
Refactor internal/lsp/cache to use a new temporary go.mod file for each
go command invocation. This cleans up the abstraction in the source
package, as we no longer are aware of temporary go.mod files.

This will also fix the raciness of reusing the same temporary go.mod
file for each invocation.

Updates golang/go#37318.
Fixes golang/go#39504.

Change-Id: I90bc17a678b5df222ab598c8f7dbf6c6fdd393f6
Reviewed-on: https://go-review.googlesource.com/c/tools/+/237517
Run-TryBot: Rebecca Stambler <rstambler@golang.org>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: Heschi Kreinick <heschi@google.com>
2020-06-18 02:37:23 +00:00
Heschi Kreinick
6222995d07 internal/lsp: handle deletion of workspace packages
When a workspace package is deleted, we need to stop trying to load it.
Check that every workspace package still has at least one .go file when
we copy them between snapshots.

I think this is correct, but even if it's not, orphaned file loading
should patch it up.

Fixes golang/go#38977.

Change-Id: I0b11010a40aac09f619f54b5ba02e2467b15a36c
Reviewed-on: https://go-review.googlesource.com/c/tools/+/238028
Run-TryBot: Heschi Kreinick <heschi@google.com>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: Rebecca Stambler <rstambler@golang.org>
2020-06-17 16:12:49 +00:00
Heschi Kreinick
b7b89dcb81 internal/lsp/cache: support minimal module compatibility in GOPATH
In GOPATH mode, you can import example.com/foo even if it has a go.mod
that says its path is example.com/foo/v2. Adjust our import path
resolution to support that case.

Fixes golang/go#39560.

Change-Id: I758a2220c579c4374084365c3a78a3a2bbd14b01
Reviewed-on: https://go-review.googlesource.com/c/tools/+/238260
Run-TryBot: Heschi Kreinick <heschi@google.com>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: Rebecca Stambler <rstambler@golang.org>
2020-06-16 21:57:26 +00:00
Rebecca Stambler
6aa8f57aac internal/lsp: un-export (*snapshot).Config to limit it to cache
Limiting the Config to the view seems reasonable, considering that it is
only used to run the `go` command. I prefer just having the cache run
go commands, so that source doesn't have to deal with the environment.

This also enables CL 237517.

Change-Id: I639c082592de30e9682dc25cdd12c7751ddb4f97
Reviewed-on: https://go-review.googlesource.com/c/tools/+/237600
Run-TryBot: Rebecca Stambler <rstambler@golang.org>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: Heschi Kreinick <heschi@google.com>
2020-06-15 22:28:25 +00:00
Heschi Kreinick
a2fa627c4b internal/lsp/cache: don't skip x_tests
We were marking normal tests as workspace packages, but pruning x_tests.
Don't do that.

Fixes golang/go#39578.

Change-Id: Ia8eceea38e63ac17e40f50d6837de9c7a668469b
Reviewed-on: https://go-review.googlesource.com/c/tools/+/237943
Run-TryBot: Heschi Kreinick <heschi@google.com>
Reviewed-by: zikaeroh <zikaeroh@gmail.com>
Reviewed-by: Rebecca Stambler <rstambler@golang.org>
2020-06-15 19:08:35 +00:00
Heschi Kreinick
4651fa3054 internal/lsp/debug: show per-package memory usage
Calculate and display very crude memory usage statistics. This is
complicated by various levels of sharing and indirection, so the numbers
should be taken with *large* grains of salt and interpreted mostly by
experts.

Still, the results are interesting and helpful.

Change-Id: Ia9aff974c7d5fddd63df0cfd5cecc08ead33cf84
Reviewed-on: https://go-review.googlesource.com/c/tools/+/236163
Run-TryBot: Heschi Kreinick <heschi@google.com>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: Robert Findley <rfindley@google.com>
2020-06-12 20:10:52 +00:00
Rebecca Stambler
3c1b287bbd internal/lsp: await the initial workspace load in ModHandle
ModHandle races with the initial workspace load if the go.mod file does
not yet exist. We should await for the initial workspace load to
complete before proceeding with update codelenses, etc.

Part of trying to figure out the flakes in golang/go#39504.
Also a few staticcheck fixes, and fix the Windows line endings in
fill_struct.go, because `git gofmt` complains.

Change-Id: Ide21a47137390792d1afb924740cff0bb6f0b764
Reviewed-on: https://go-review.googlesource.com/c/tools/+/237419
Run-TryBot: Rebecca Stambler <rstambler@golang.org>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: Heschi Kreinick <heschi@google.com>
2020-06-12 18:21:55 +00:00
Rebecca Stambler
9001f16f58 internal/lsp: cancel the initial workspace load when view shuts down
The error messages from view cancellation clutter up the logs when
testing, especially if you're running a single subtest.

A few quick staticcheck fixes in the CL also.

Change-Id: Ia1ed5360ac754023c589ed526ec0ed3e94a79b2f
Reviewed-on: https://go-review.googlesource.com/c/tools/+/237637
Run-TryBot: Rebecca Stambler <rstambler@golang.org>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: Heschi Kreinick <heschi@google.com>
2020-06-12 18:06:40 +00:00
Heschi Kreinick
f520afa52e internal/lsp: remove Ignore feature
Ignore ignored the builtin package and files that start with _. The
latter should already be ignored by "go list". The former seems
like too much effort to me. People shouldn't edit random parts of the
stdlib, and ignoring changes to (e.g.) the Error interface seems like
the least of the trouble they can get themselves into.

Remove it for now. If we get complains I'll re-add it, probably by
rejecting the write entirely somewhere.

We incidentally relied on this in the identifier functions; change those
to treat the builtin package slightly more specially.

Change-Id: I005b02a66b1a987c50a3074d53a2d28ff07d3324
Reviewed-on: https://go-review.googlesource.com/c/tools/+/237597
Run-TryBot: Heschi Kreinick <heschi@google.com>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: Rebecca Stambler <rstambler@golang.org>
2020-06-11 22:55:14 +00:00
Heschi Kreinick
02f7de68dc internal/lsp/cache: vendored packages are not workspace packages
Most people aren't going to edit vendored packages; we don't need to
fully analyze them.

Fixes golang/go#38080.

Change-Id: I9c9a286b5340ecffe976b0ea652f1d3b4de4bd41
Reviewed-on: https://go-review.googlesource.com/c/tools/+/237598
Run-TryBot: Heschi Kreinick <heschi@google.com>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: Rebecca Stambler <rstambler@golang.org>
2020-06-11 22:31:50 +00:00
Heschi Kreinick
ca43edf915 internal/lsp/cache: intermediate test variants aren't workspace packages
When you write a test in (say) the fmt package, you get a test variant
augmented with the test files. In many cases you also get test variants
of the things the fmt package depends on. The primary test variant,
(fmt [fmt.test]) is interesting to us, because it contains the tests.
But the intermediate variants (testing [fmt.test]) aren't -- the user
can only get to them indirectly. We certainly don't need to fully parse
them.

Treat intermediate test variants as non-workspace packages. This doesn't
accomplish much yet but paves the way for later optimizations.

Updates golang/go#36943.

Change-Id: I1a20abcd2d67767f07132a75a20f098be6f19a76
Reviewed-on: https://go-review.googlesource.com/c/tools/+/236397
Run-TryBot: Heschi Kreinick <heschi@google.com>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: Rebecca Stambler <rstambler@golang.org>
2020-06-11 22:26:57 +00:00
Heschi Kreinick
ecd3fc4348 internal/lsp: read files eagerly
We use file identities pervasively throughout gopls. Prior to this
change, the identity is the modification date of an unopened file, or
the hash of an opened file. That means that opening a file changes its
identity, which causes unnecessary churn in the cache.

Unfortunately, there isn't an easy way to fix this. Changing the
cache key to something else, such as the modification time, means that
we won't unify cache entries if a change is made and then undone. The
approach here is to read files eagerly in GetFile, so that we know their
hashes immediately. That resolves the churn, but means that we do a ton
of file IO at startup.

Incidental changes:

Remove the FileSystem interface; there was only one implementation and
it added a fair amount of cruft. We have many other places that assume
os.Stat and such work.

Add direct accessors to FileHandle for URI, Kind, and Version. Most uses
of (FileHandle).Identity were for stuff that we derive solely from the
URI, and this helped me disentangle them. It is a *ton* of churn,
though. I can revert it if you want.

Change-Id: Ia2133bc527f71daf81c9d674951726a232ca5bc9
Reviewed-on: https://go-review.googlesource.com/c/tools/+/237037
Run-TryBot: Heschi Kreinick <heschi@google.com>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: Rebecca Stambler <rstambler@golang.org>
2020-06-11 22:11:59 +00:00
Ian Cottrell
54cf04ef09 internal/lsp: decouple client and server debug
This uses log messages to convey information to the debug system, which
has the benefit of logging even if the debug pages are not active and
also not requiring systems to reach into the debug system or require
extra lifetime tracking Not all things are decoupled yet as there are a
couple of places (notably the handshaker) that read information out of
the debug system.

Change-Id: Iec1f81c34ab3b11b3e3d6e6eb39b98ee5ed0d849
Reviewed-on: https://go-review.googlesource.com/c/tools/+/236337
Run-TryBot: Ian Cottrell <iancottrell@google.com>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: Robert Findley <rfindley@google.com>
2020-06-11 13:49:48 +00:00
Matthew Dempsky
2ee2e4c56a go/packages: move TypecheckCgo to packagesinternal
Updates golang/go#16623.
Updates golang/go#39072.

Change-Id: I6612cdac14faa5ad724ceb805e1d6c823b4046ff
Reviewed-on: https://go-review.googlesource.com/c/tools/+/237423
Run-TryBot: Matthew Dempsky <mdempsky@google.com>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: Heschi Kreinick <heschi@google.com>
2020-06-10 22:20:39 +00:00
Matthew Dempsky
51e3d70dba go/packages: use go115UsesCgo instead of UsesCgo
x/tools half of golang.org/cl/237417.

Updates #16623.
Updates #39072.

Change-Id: Ic31c2cf64dc1b71b70912b9641cf468f60d116f8
Reviewed-on: https://go-review.googlesource.com/c/tools/+/237418
Run-TryBot: Matthew Dempsky <mdempsky@google.com>
Reviewed-by: Heschi Kreinick <heschi@google.com>
2020-06-10 21:22:23 +00:00
Ian Cottrell
ce53dc4445 internal/lsp: clean out the debug handling
This removes all the cache/session/view hooks from the lsp and instead
uses normal introspection from the client to find all the entities
rather than keeping shadow copies of the object graph in the debug page
handler.
This required the addition only of the ability to view the sessions open
on a cache and exposing the unique identifier for all the objects, both
of which are useful and reasonable things to have in the API anyway.

Change-Id: Ic19903e7b19832ca79290954ec373d4177789742
Reviewed-on: https://go-review.googlesource.com/c/tools/+/236197
Run-TryBot: Ian Cottrell <iancottrell@google.com>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: Robert Findley <rfindley@google.com>
2020-06-06 01:49:14 +00:00
Rebecca Stambler
4d5ea46c79 internal/lsp: support go mod vendor as a command
In addition to adding a `go mod vendor` command option, which can be
exposed via an editor client frontend, we show a suggestion to users who
experience the "inconsistent vendoring" error message.

The main change made here is that we save the view initialization error,
and we return it if the view has absolutely no metadata. This seems
reasonable enough, but my fear is that it may lead to us showing
outdated error messages. I will spend some time improving the handling
of initialization errors in follow-up CLs.

Updates golang/go#39100

Change-Id: Iba21fb3fbfa4bca956fdf63736b397c47fc7ae44
Reviewed-on: https://go-review.googlesource.com/c/tools/+/235619
Run-TryBot: Rebecca Stambler <rstambler@golang.org>
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Reviewed-by: Heschi Kreinick <heschi@google.com>
2020-06-04 18:33:45 +00:00
Ian Cottrell
8a3674bff3 internal/lsp: change exit handling
Exit now closes the connection rather than exiting the process.
This allows things to shutdown gracefully, and removes special
cases. It also allows the tests to call CloseEditor instead of
just Shutdown, which prevents goroutine leaks.

Change-Id: I26121ba5d393ef74ce0e912611c8b3817e3691ea
Reviewed-on: https://go-review.googlesource.com/c/tools/+/231798
Reviewed-by: Robert Findley <rfindley@google.com>
2020-06-03 13:14:19 +00:00
Emrecan BATI
7521f6f425 internal/lsp/cache: show update codelens in go.mod when -mod=vendor
Ignore vendor folder while checking module updates to be able to capture
updates.

Fixes golang/go#38711

Change-Id: I522246459f98c238c2b5cd28e6028f2b94cde7d9
Reviewed-on: https://go-review.googlesource.com/c/tools/+/232477
Run-TryBot: Rebecca Stambler <rstambler@golang.org>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: Rebecca Stambler <rstambler@golang.org>
2020-05-19 17:58:26 +00:00
Michael Matloob
10921354bc go/packages: add a Module field to the Package struct
This change introduces Module and ModuleError struct types to the
packages package with the same types as defined in the cmd/go
documentation for module information output by go list (with the
exception of the Module type's Versions and Update fields).
go/packages will fill the module struct with the module information
output by go list. Drivers that support modules can also provide
module information by filling the Module fields in the packages in
their driverResponses.

Fixes golang/go#35921

Change-Id: Icbdf79869f09d26f6a01c3670146ace4f6ffa25e
Reviewed-on: https://go-review.googlesource.com/c/tools/+/234219
Run-TryBot: Michael Matloob <matloob@golang.org>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: Rebecca Stambler <rstambler@golang.org>
2020-05-19 14:27:18 +00:00
Heschi Kreinick
d3bf790afa internal/lsp: add Regenerate Cgo code lens
Now that we support authoring cgo packages better, we need a way to
regenerate the C definitions. Doing it automatically is very difficult;
in particular, referencing a new symbol from the C package may require
regeneration, but we don't want to do that for every typo.

For now, give the user a button and make them push it. We attach a
code lens to the import "C" line. This is vulnerable to the usual
user-didn't-save glitches.

Updates golang/go#35721.

Change-Id: Iaa3540a9a12bbd8705e7f0e43ad0be1b22e87067
Reviewed-on: https://go-review.googlesource.com/c/tools/+/234103
Run-TryBot: Heschi Kreinick <heschi@google.com>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: Robert Findley <rfindley@google.com>
2020-05-15 22:01:28 +00:00
Rob Findley
8ddc06776e internal/lsp/source: don't link to packages matching GOPRIVATE in hover
Currently, our hover text by default links point to public documentation
sites (e.g. pkg.go.dev). This doesn't make sense for private repos, so
hide the hovertext link when the import path matches GOPRIVATE.

Implementing this was a little messy. To be optimal I had to thread
the value of goprivate through cache.view, and to be correct I had to
duplicate some code from cmd/go internal.

Regtest will follow after https://golang.org/cl/232983 is submitted.

Updates golang/go#36998

Change-Id: I1e556471bf919fea30132d9642426a08fdb7f434
Reviewed-on: https://go-review.googlesource.com/c/tools/+/233524
Run-TryBot: Robert Findley <rfindley@google.com>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: Rebecca Stambler <rstambler@golang.org>
2020-05-15 19:36:02 +00:00
Heschi Kreinick
7d3b6ebf13 internal/lsp/cache: pass UsesCgo to go/types
In CL 229779 I enabled Cgo type checking for go/packages, but we don't
actually type check there. We need to enable it in our own type checking
too.

No test updates because the negative effects are relatively subtle and
caught by an upcoming regtest.

Change-Id: I31691d69eb104cdabfd4fbe0a14b1f3c9741eabb
Reviewed-on: https://go-review.googlesource.com/c/tools/+/234102
Run-TryBot: Heschi Kreinick <heschi@google.com>
Reviewed-by: Rebecca Stambler <rstambler@golang.org>
TryBot-Result: Gobot Gobot <gobot@golang.org>
2020-05-15 01:05:26 +00:00
Heschi Kreinick
0951661448 internal/lsp: use TypecheckCgo when possible
When on 1.15+, enable TypecheckCgo. This improves cgo support
significantly, but we'll still have trouble with newly-referenced C
identifiers and changes to the magic comment.

Updates golang/go#35721.

Change-Id: I44dc95ce2d91d552e1e66e3722dc4230ab59fedd
Reviewed-on: https://go-review.googlesource.com/c/tools/+/229779
Run-TryBot: Heschi Kreinick <heschi@google.com>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: Rebecca Stambler <rstambler@golang.org>
2020-05-13 17:53:51 +00:00
Rebecca Stambler
6441d34c3f internal/lsp: fix caching issue with duplicate handles
In (*snapshot).addPackage, we return early if the package handle is
already cached, but we continue building the dependency graph with a
handle passed into addPackage.

This seems fine since both handles should have the same cache key,
but if we clone the snapshot, we will end up dropping the handle that
had the type information on it. It will then have to be recomputed,
causing the skew in the types.Package.

Fixes golang/go#38403

Change-Id: I0e360447a428123fcac444fbea3c2a3232ef941a
Reviewed-on: https://go-review.googlesource.com/c/tools/+/232817
Run-TryBot: Rebecca Stambler <rstambler@golang.org>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: Heschi Kreinick <heschi@google.com>
2020-05-07 19:23:25 +00:00
Rob Findley
08cbf656ce internal/lsp/cache: add an UnsavedFiles method to Session
It is useful to know whether the session has any unsaved files, for
example to warn/error when executing a command that interacts only with
files on disk.

Add a new UnsavedFiles method to the Session.

Change-Id: Iea4bf472e3ed6897979306b670eb974a2ee0d3bb
Reviewed-on: https://go-review.googlesource.com/c/tools/+/232747
Run-TryBot: Robert Findley <rfindley@google.com>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: Rebecca Stambler <rstambler@golang.org>
2020-05-07 17:51:45 +00:00
smasher164
a1532b81a2 internal/lsp/cache: avoid string(int) conversion
LoadMode and ParseMode are currently hashed with a string(int)
conversion, but this conversion is now discouraged (see the vet check
'stringintconv' for more information). Since the hash uses the code
point, this change replaces these instances with string(rune(int)).

Updates golang/go#32479.

Change-Id: I0d8e91d073fc34ac9faafe75a0d86cf71a5327d4
Reviewed-on: https://go-review.googlesource.com/c/tools/+/232679
Reviewed-by: Rebecca Stambler <rstambler@golang.org>
Run-TryBot: Rebecca Stambler <rstambler@golang.org>
TryBot-Result: Gobot Gobot <gobot@golang.org>
2020-05-07 05:02:07 +00:00
Rebecca Stambler
88e38c1d8d internal/lsp: make sure diagnostics only refer to existing files
We were previously sending diagnostics for nonexistent files, and then
adding them to the snapshot in the process. Remove this behavior, and
add a regression test. Case insensitive filesystems were too confusing
to write a test for, but fortunately, Filippo reported another instance
of this bug, so I used that for the regression test.

Fixes golang/go#38602

Change-Id: I4ef6b51944f3338e838875a5aafffd066e8392f4
Reviewed-on: https://go-review.googlesource.com/c/tools/+/230315
Run-TryBot: Rebecca Stambler <rstambler@golang.org>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: Heschi Kreinick <heschi@google.com>
Reviewed-by: Robert Findley <rfindley@google.com>
2020-05-07 02:01:22 +00:00
Ian Cottrell
535e1470ec internal/lsp: use %w in error wrappers
This fixes a bunch of fmt.Errorf calls to use %w rather than %v when wrapping
an error with additional context.

Change-Id: I03088376fbf89aa537555e825e5d02544d813ed2
Reviewed-on: https://go-review.googlesource.com/c/tools/+/231477
Run-TryBot: Ian Cottrell <iancottrell@google.com>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: Robert Findley <rfindley@google.com>
Reviewed-by: Rebecca Stambler <rstambler@golang.org>
2020-05-04 14:52:14 +00:00
Heschi Kreinick
e9a00ec821 internal/lsp/cache: correctly split env vars
We were using strings.Split on env vars, which did bad stuff when the
var contained an =, e.g. GOFLAGS=-tags=foo. Only split on the first =.

Irritatingly, this breaks only `go mod` commands, so almost nothing in
gopls failed, just organize imports and the `go.mod` code lens stuff.

Fixes golang/go#38669

Change-Id: I8d28c806b77a8df92100af1fa4fbcca5edf97cff
Reviewed-on: https://go-review.googlesource.com/c/tools/+/230560
Run-TryBot: Heschi Kreinick <heschi@google.com>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: Rebecca Stambler <rstambler@golang.org>
2020-04-28 18:55:08 +00:00
pjw
f3a5411a4c internal/lsp: fix panic when trying to log an event
Formatting keys in labels can panic when a label is constructed with a nil
error. Avoid that by not passing the defective label to event.Log.

Change-Id: I3099a7ac48c5830af1072141f2b619d0e0fbcf5a
Reviewed-on: https://go-review.googlesource.com/c/tools/+/229985
Run-TryBot: Peter Weinberger <pjw@google.com>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: Ian Cottrell <iancottrell@google.com>
2020-04-26 10:28:38 +00:00
Ian Cottrell
a82abb5396 internal/event: extract keys to their own package
Now key types can be implemented outside the package that holds labels or events, they should be.
This prevents the large list of types from poluting the public interface of the core packages.

Change-Id: I927f31cb5e4e1d0c29619681015962f890623e5c
Reviewed-on: https://go-review.googlesource.com/c/tools/+/229240
Run-TryBot: Ian Cottrell <iancottrell@google.com>
Reviewed-by: Robert Findley <rfindley@google.com>
2020-04-23 18:13:43 +00:00
Ian Cottrell
7b212d60a1 internal/event: renaming the main event API functions
event.Log removed
event.Print -> event.Log
event.Record -> event.Metric
event.StartSpan -> event.Start

In order to support this core now exposes the MakeEvent and Export functions.

Change-Id: Ic7550d88dbf400e32c419adbb61d1546c471841e
Reviewed-on: https://go-review.googlesource.com/c/tools/+/229238
Reviewed-by: Robert Findley <rfindley@google.com>
2020-04-23 17:21:36 +00:00
Ian Cottrell
cf0cb92717 internal/telemetry: renaming to internal/event
internal/telemetry/event was renamed to internal/event/core
Some things were partly moved from internal/telemetry/event straight to
internal/event to minimize churn in the following restructuring.

Change-Id: I8511241c68d2d05f64c52dbe04748086dd325158
Reviewed-on: https://go-review.googlesource.com/c/tools/+/229237
Run-TryBot: Ian Cottrell <iancottrell@google.com>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: Robert Findley <rfindley@google.com>
2020-04-23 17:20:48 +00:00
Rebecca Stambler
3d57cf2e72 internal/lsp: add regtest for golang/go#37984
This change also required the addition of a new run configuration -
WithEnv, which adds extra environment variables to the configuration.
Please let me know if this is the wrong approach.

Fixes golang/go#37984

Change-Id: Ied2a53a443dc74c7ed723b91765eeddc1a7c1c00
Reviewed-on: https://go-review.googlesource.com/c/tools/+/229128
Run-TryBot: Rebecca Stambler <rstambler@golang.org>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: Robert Findley <rfindley@google.com>
2020-04-22 02:23:33 +00:00
Rebecca Stambler
3bd20875a2 internal/lsp/cache: hide type errors if we fix up the AST
I was curious about why were logging errors during type-checking in
tests, and the answer turned out to be a bit more sinister than I
expected. We were getting type error messages without filepaths, so I
tried to reproduce it in the playground and wasn't able to. I realized
that these errors were coming from were coming from the "fixed" version
of the AST that we pass to the type checker.

Adding fake positions to our fake Cond statements trivially fixes the
logging issue, but it does nothing to handle the fact that the error
makes no sense to the user - because it applies to something that's not
in the source code. I figured we have two options: (1) skip type errors
for all packages with "fixed" ASTs, or (2) add something to the error
messages to indicate that the source code may not match. Starting with
(1) here, and if it becomes a problem, we can move to 2. All ASTs that
we fix have *ast.BadExpr in them, meaning that, by definition they have
parse errors which we will preferentially show those errors to users in
diagnostics (so I'm not sure how to test this).

Change-Id: I17733968aa15f989cdd3e4e7261c4f4fe9b97495
Reviewed-on: https://go-review.googlesource.com/c/tools/+/227557
Run-TryBot: Rebecca Stambler <rstambler@golang.org>
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Reviewed-by: Heschi Kreinick <heschi@google.com>
2020-04-10 04:07:51 +00:00
Rohan Challa
46bd65c853 internal/lsp/cache: add concurrency error check for go cmds
This change attempts to fix a concurrency error that would cause
textDocument/CodeLens, textDocument/Formatting, textDocument/DocumentLink,
and textDocument/Hover from failing on go.mod files.

The issue was that the go command would return a potential concurrency
error since the ModHandle and the ModTidyHandle are both using the
temporary go.mod file.

Updates golang/go#37824

Change-Id: I6cd63c1f75817c7308e033aec473966536a2a3bd
Reviewed-on: https://go-review.googlesource.com/c/tools/+/224917
Reviewed-by: Heschi Kreinick <heschi@google.com>
Run-TryBot: Rebecca Stambler <rstambler@golang.org>
TryBot-Result: Gobot Gobot <gobot@golang.org>
2020-04-08 03:22:09 +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>
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2020-04-08 01:45:16 +00:00
Rebecca Stambler
3304cfb00f internal/lsp: temporarily disable type error analyzers by default
If we release gopls/v0.4.0 soon, we should keep these new analyzers off
by default. They were just merged, so they haven't been used enough to
be enabled, I think. We'll turn them on by default for gopls/v0.5.0.

Also, ended up creating a helper function to check if analysis has been
abled (which fixed a small bug in FindAnalysisError), and another helper
function to enable all analyses for testing purposes.

Updates golang/go#38212

Change-Id: I5ee94b3582dfc0863978650fc6ce51bfa0606c13
Reviewed-on: https://go-review.googlesource.com/c/tools/+/226962
Run-TryBot: Rebecca Stambler <rstambler@golang.org>
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Reviewed-by: Rohan Challa <rohan@golang.org>
2020-04-02 16:54:32 +00:00
Rebecca Stambler
2d9ba733ec internal/lsp: add a mutex around the view's options
The options can be modified without the view being recreated, so we need
a mutex there.

Change-Id: I87e881835622a941fce98e4a1062aa41acd84fcb
Reviewed-on: https://go-review.googlesource.com/c/tools/+/227022
Reviewed-by: Ian Cottrell <iancottrell@google.com>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Run-TryBot: Rebecca Stambler <rstambler@golang.org>
2020-04-02 16:41:49 +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
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Reviewed-by: Ian Cottrell <iancottrell@google.com>
Reviewed-by: Heschi Kreinick <heschi@google.com>
2020-03-31 01:46:33 +00:00
Rebecca Stambler
9c79f685b7 internal/lsp: fix view rebuilding when go mod init runs
https://github.com/microsoft/vscode-go/issues/3076#issuecomment-605062933
inspired me to write a regression test for this case. Turns out we
weren't handling it correctly after all...

This change makes sure that we only rebuild the view once a new go.mod
file is saved, not just created. It also preserves the snapshot ID
number when the view is recreated so that diagnostic caching continues
to work as expected.

Change-Id: I63bd559c3bd33b91828171cd7ddb3d099c31cddb
Reviewed-on: https://go-review.googlesource.com/c/tools/+/226017
Run-TryBot: Rebecca Stambler <rstambler@golang.org>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: Heschi Kreinick <heschi@google.com>
Reviewed-by: Robert Findley <rfindley@google.com>
2020-03-30 17:42:33 +00:00
Heschi Kreinick
82bb89366a internal/lsp/cache: validate workspace path case
On case-insensitive file systems, the editor may send us a path that
works but doesn't match the actual file's case. Then when we run go
list, we'll get mismatching paths and everything will break.

We can't reliably fix this problem: tracking what case the editor
expects is too difficult to be worth it. Instead, check the workspace
path and bail if it's mismatched.

Possibly we should also check files on DidOpen or such, but we can start
with this.

Updates golang/go#36904.

Change-Id: I7635c8136bf9400db4143a0f2fde25c39b5abc44
Reviewed-on: https://go-review.googlesource.com/c/tools/+/225239
Reviewed-by: Ian Cottrell <iancottrell@google.com>
2020-03-27 19:55:53 +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
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>
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Reviewed-by: Rebecca Stambler <rstambler@golang.org>
2020-03-27 17:27:16 +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
f53864d0db internal/lsp: remove command-line-arguments as a workspace package
If a package starts out as command-line-arguments, and then becomes
"valid" (i.e., gets a package declaration), we shouldn't continue to try
to diagnose "command-line-arguments". We should remove
"command-line-arguments" from workspace packages any time its metadata
is invalidated (assuming it may get added back if a file= query produces
it again).

Include the relevant regression test.

Fixes golang/go#37978

Change-Id: I7fc51edeb58007b4b4a163336cbeb752a53da322
Reviewed-on: https://go-review.googlesource.com/c/tools/+/225317
Run-TryBot: Rebecca Stambler <rstambler@golang.org>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: Heschi Kreinick <heschi@google.com>
Reviewed-by: Robert Findley <rfindley@google.com>
2020-03-25 20:31:30 +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
Rebecca Stambler
6fb6f5a9fc internal/lsp: never reload command-line-arguments directly
I'm not sure if this is entirely the correct approach, but at the very
least we should never pass "command-line-arguments" to packages.Load. We
still need to cache packages with the path "command-line-arguments" to
avoid an excessive number of calls to packages.Load.

Updates golang/go#37978

Change-Id: I1b5263a3dab95aacd797f03f742069fd0c53619c
Reviewed-on: https://go-review.googlesource.com/c/tools/+/225117
Run-TryBot: Rebecca Stambler <rstambler@golang.org>
Reviewed-by: Heschi Kreinick <heschi@google.com>
2020-03-24 17:58:52 +00:00
jiacai2050
bbbf714b4a internal/lsp: fix nil pointer in 'go mod why' logic
Fixes golang/go#37977

Change-Id: I125c7900e8ee7975f179ea68333ea347b9bfa9e8
GitHub-Last-Rev: 69b71b7853dedc1dc42e96059aa693a4b8652062
GitHub-Pull-Request: golang/tools#217
Reviewed-on: https://go-review.googlesource.com/c/tools/+/224591
Reviewed-by: Rohan Challa <rohan@golang.org>
2020-03-24 16:11:17 +00:00
Ian Cottrell
540150da73 internal/telemetry: add type safe tag keys
This changes the way keys work, there is still a single internal key
implementation for performance reasons, but the public interface is a set of key
implementations that have type safe Of and Get methods.
This also hides the implemenation of Tag so that we can modify the storage form
and find a more efficient storage if needed.

Change-Id: I6a39cc75c2824c6a92e52d59f16e82e876f16e9c
Reviewed-on: https://go-review.googlesource.com/c/tools/+/223137
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 13:29:43 +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
aca
df010c5017 internal/lsp/cache: fix typo
Change-Id: Ida5ed631652d9d4e35018300ab098ebb24b75856
Reviewed-on: https://go-review.googlesource.com/c/tools/+/223498
Reviewed-by: Toshihiro Shiino <shiino.toshihiro@gmail.com>
Reviewed-by: Rebecca Stambler <rstambler@golang.org>
Run-TryBot: Rebecca Stambler <rstambler@golang.org>
TryBot-Result: Gobot Gobot <gobot@golang.org>
2020-03-16 18:21:19 +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
3dc7fec788 internal/lsp/cache: remove parseGo semaphore
The original intention was to limit the number of open file handles,
but the parseLimit semaphore was limiting parser.ParseFile calls that
don't access files, so there was no benefit. The file limiting is
already handled generically by another semaphore in the lsp FileSystem
abstraction.

Change-Id: Idc7f2507af5287e983a7edf3e38a848d26770bbe
Reviewed-on: https://go-review.googlesource.com/c/tools/+/223119
Run-TryBot: Muir Manders <muir@mnd.rs>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: Rebecca Stambler <rstambler@golang.org>
2020-03-12 03:18:52 +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
Rohan Challa
51e69f7192 internal/lsp/cache/mod: return errors only within ModHandle and ModTidyHandle
This change makes ModHandle and ModTidyHandle return a ModData structure that only contains an error if something goes wrong when parsing the .mod files.

Change-Id: I89661cfefeff666bdf13cf99f4c56137e120de82
Reviewed-on: https://go-review.googlesource.com/c/tools/+/222242
Run-TryBot: Rohan Challa <rohan@golang.org>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: Rebecca Stambler <rstambler@golang.org>
2020-03-06 19:16:17 +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
Rob Findley
6a641547f5 internal/lsp/cache: fix NPE in fileWasSaved
Reading the docstring, it looks like the sense of the type assertion was
accidentally inverted in this function. Fix it to what I believe was
intended.

Fixes golang/go#37687

Change-Id: Ief44a996f1a262527c2916d6b78b81dd35b2cf9e
Reviewed-on: https://go-review.googlesource.com/c/tools/+/222217
Run-TryBot: Rohan Challa <rohan@golang.org>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: Rohan Challa <rohan@golang.org>
2020-03-05 18:53:22 +00:00
Rohan Challa
d6a4d55695 internal/lsp/cache: attach ModTidyHandle to snapshot instance
This change attaches a modTidyHandle to the snapshot instance and tries to reuse it as often as possible. It also modifies the modTidyKey to include the files that have not yet been saved. This was necessary because `go mod tidy` only runs using contents on disk.

So, if a user decides to add an import that is not in their modcache, we run diagnostics as normal and the ModTidyKey's imports field gets updated with the new import, we run `go mod tidy` but since the file was not saved yet, nothing changes. Then when the user eventually saves their file, we do not rerun `go mod tidy` because the imports hash has not changed from the time the file was in overlay to the time the file was saved on disk. To be able to account for this, we need the invalidate the ModTidyKey when imports change between saves.

Change-Id: I9e210a15cf009d222cecd7824c2a1a927957483b
Reviewed-on: https://go-review.googlesource.com/c/tools/+/219477
Run-TryBot: Rohan Challa <rohan@golang.org>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: Rebecca Stambler <rstambler@golang.org>
2020-03-04 14:31:13 +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
Heschi Kreinick
5bcca83a78 internal: rationalize debug logging
In all cases, use a Logf field to configure debug logging. Non-nil means
that logging is enabled through the given function.

Fixes accidental debug spam from goimports, which had a separate Debug
flag that was supposed to guard logging, but wasn't used when creating
the gocommand.Invocation.

Change-Id: I448fa282111db556ac2e49801268d0affc19ae30
Reviewed-on: https://go-review.googlesource.com/c/tools/+/221557
Run-TryBot: Heschi Kreinick <heschi@google.com>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: Daniel Martí <mvdan@mvdan.cc>
Reviewed-by: Rebecca Stambler <rstambler@golang.org>
2020-03-03 16:59:18 +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
Rebecca Stambler
020676185e internal/lsp: replace mistaken "break" with "continue"
I had meant to continue instead of break this loop. This caused us to
invalidate all IDs (except for those for one file) every time a snapshot
was cloned.

Picked up a staticcheck fix along the way.

Change-Id: I8fb3b2bdd6b58ac21130e01cb0d32fa6a57e6b73
Reviewed-on: https://go-review.googlesource.com/c/tools/+/221103
Run-TryBot: Rebecca Stambler <rstambler@golang.org>
Reviewed-by: Rohan Challa <rohan@golang.org>
2020-02-26 17:12:34 +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
Rebecca Stambler
807dcd8834 internal/lsp: invalidate package IDs along with metadata
We had previously only added to a list of package IDs, rather than
invalidating package IDs along with metadata. This is because we loaded
packages by file, rather than by package path or workspace. Now that we
load by workspace, we can invalidate package IDs. This will avoid the
issue of lingering "command-line-arguments" IDs.

Fixes golang/go#37213

Change-Id: I21830219efaf0df9531e9d811ccbc3f141c0cbcb
Reviewed-on: https://go-review.googlesource.com/c/tools/+/220197
Run-TryBot: Rebecca Stambler <rstambler@golang.org>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: Heschi Kreinick <heschi@google.com>
2020-02-25 23:00:52 +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
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
Run-TryBot: Rebecca Stambler <rstambler@golang.org>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: Heschi Kreinick <heschi@google.com>
2020-02-25 18:38:19 +00:00
Rob Findley
20f46356b3 internal/lsp/lsprpc: add a handshake between forwarder and remote
In the ideal future, users will have one or more gopls instances, each
serving potentially many LSP clients. In order to have any hope of
navigating this web, clients and servers must know about eachother.

To allow for such an exchange of information, this CL adds an additional
handler layer to the serving configured in the lsprpc package. For now,
forwarders just use this layer to execute a handshake with the LSP
server, communicating the location of their logs and debug addresses.

Updates golang/go#34111

Change-Id: Ic7432062c01a8bbd52fb4a058a95bbf5dc26baa3
Reviewed-on: https://go-review.googlesource.com/c/tools/+/220081
Run-TryBot: Robert Findley <rfindley@google.com>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: Heschi Kreinick <heschi@google.com>
2020-02-24 22:51:04 +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
Rohan Challa
9c32af924b internal/lsp: create more descriptive temp go.mod name
This change improves the temporary go.mod file name to include the base directory of the folder that is opened.

Change-Id: Ide759222e268bdc24f82b29625ac18f4f285aa64
Reviewed-on: https://go-review.googlesource.com/c/tools/+/220361
Run-TryBot: Rohan Challa <rohan@golang.org>
Reviewed-by: Robert Findley <rfindley@google.com>
TryBot-Result: Gobot Gobot <gobot@golang.org>
2020-02-21 19:09:30 +00:00
Brian Falk
77adbdfd2c internal/lsp: report use of disallowed internal packages
An error should be reported if an "internal" package is imported
into code that is outside of the tree rooted at the parent
of the "internal" directory.

Fixes #35937

Change-Id: If5ff3dd79b462087381d575dddb20b78c10f0a83
GitHub-Last-Rev: f5d19960046da7f9701325afc36b5bd0b9663ab6
GitHub-Pull-Request: golang/tools#207
Reviewed-on: https://go-review.googlesource.com/c/tools/+/218977
Reviewed-by: Rebecca Stambler <rstambler@golang.org>
Run-TryBot: Rebecca Stambler <rstambler@golang.org>
TryBot-Result: Gobot Gobot <gobot@golang.org>
2020-02-19 20:30:42 +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>
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Reviewed-by: Heschi Kreinick <heschi@google.com>
Reviewed-by: Rebecca Stambler <rstambler@golang.org>
2020-02-19 18:42:16 +00:00
Muir Manders
753a1d49df internal/lsp/cache: kill unused func fixAccidentalDecl
I think I resurrected this accidentally when resolving a merge
conflict.

Change-Id: Ib871068902eeaaca9b95878f3e40ed5e53d6814f
Reviewed-on: https://go-review.googlesource.com/c/tools/+/220018
Run-TryBot: Muir Manders <muir@mnd.rs>
Reviewed-by: Rebecca Stambler <rstambler@golang.org>
2020-02-19 05:42:38 +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
548b770e2d internal/lsp/cache: parse go.mod file before running go mod tidy
This change reorders the logic within ModTidyHandle and ParseModHandle to parse the modfile first before we copy the contents to the temporary go.mod file. This was causing issues where a go.mod would be in a bad state and then we would try to run "go mod tidy" on the corrupted file.

Change-Id: I1df8fb70f5f3e2bcff306a58b16bc96c32debf2a
Reviewed-on: https://go-review.googlesource.com/c/tools/+/219480
Run-TryBot: Rohan Challa <rohan@golang.org>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: Rebecca Stambler <rstambler@golang.org>
2020-02-14 20:11:35 +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
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
Run-TryBot: Muir Manders <muir@mnd.rs>
Reviewed-by: Rebecca Stambler <rstambler@golang.org>
TryBot-Result: Gobot Gobot <gobot@golang.org>
2020-02-14 17:25:38 +00:00