Commit Graph

299 Commits

Author SHA1 Message Date
Suzy Mueller 7f2330708b internal/lsp: limit diagnostics for upgrades to codelens go.mod file
The Check for upgrades codelens was only looking for upgrades for
the current module, but was applying diagnostics to all go.mod
files in the workspace. This change makes sure to only apply the
diagnostics in the same selected go.mod.

Fixes golang/go#54556

Change-Id: I1eacbc8af2e9dcfe1e1a67516f047bcb94099872
Reviewed-on: https://go-review.googlesource.com/c/tools/+/425195
gopls-CI: kokoro <noreply+kokoro@google.com>
TryBot-Result: Gopher Robot <gobot@golang.org>
Run-TryBot: Suzy Mueller <suzmue@golang.org>
Reviewed-by: Alan Donovan <adonovan@google.com>
2022-08-26 17:39:52 +00:00
Robert Findley f1bb5ca08f internal/lsp/cache: report a critical error when go.work is invalid
When a go.work file fails to validate, the workspace is left in an
invalid state: we will detect that the workspace is defined by the
go.work, but will not actually parse any active modules. This should be
a critical error.

Fix this by adding allowing the workspace to surface critical errors via
a new cache.workspace.criticalError method.

Additionally:
 - only build the workspace mod file in workspace.build if the mode is
   fileSystemWorkspace (in all other modes the modfile is already
   determined)
 - rename workspace.invalidate to workspace.Clone, to be consistent with
   other data structures
 - rename CriticalError.DiagList to CriticalError.Diagnostics
 - add several TODOs for observations while reading the code
 - create a new file for regtests related to broken workspaces
 - make the regtest sandbox panic when duplicate paths are present in
   the sandbox file set (an error I made while writing the test)

Updates golang/go#53933

Change-Id: If8625ab190129bc9c57e784314bc9cc92644c955
Reviewed-on: https://go-review.googlesource.com/c/tools/+/417593
Reviewed-by: Hyang-Ah Hana Kim <hyangah@gmail.com>
gopls-CI: kokoro <noreply+kokoro@google.com>
TryBot-Result: Gopher Robot <gobot@golang.org>
Run-TryBot: Robert Findley <rfindley@google.com>
2022-07-27 18:59:40 +00:00
Alan Donovan b230791f2d internal/lsp/cache: move PosTo{Decl,Field} out of cache
Before, these methods of the Source interface used to use
a cache of buildASTCache, which built a Pos-keyed map for
a whole file, but the necessary algorithm is essentially
a binary search which is plenty fast enough to avoid the
need for cache.

This change implements that algorithm and moves
both methods out of the interface into a single function,
source.FindDeclAndField.

--

I measured the duration of all calls to astCacheData (before)
and FindDeclAndField (after) occurring within this command:

  $ go test -bench=TestBenchmarkConfiguredCompletion -v ./gopls/internal/regtest/bench -completion_workdir=$HOME/w/kubernetes -completion_file=../kubernetes/pkg/generated/openapi/zz_generated.openapi.go -completion_regexp=Get

(The numbers reported by this benchmark are problematic,
which is why I measured call times directly; see
https://github.com/golang/go/issues/53798.)

Results:
before (n=4727) max =  21ms, 90% = 4.4ms, median = 19us
after  (n=6282) max = 2.3ms, 90% = 25us,  median = 14us

The increased number of calls to the function after the change
is due to a longstanding bug in the benchmark: each iteration of
the b.N loop doesn't do a fixed amount of work, it does as much
as it can in 10s. Thus making the code faster simply causes
the benchmark to spend the same amount of time on other parts of
the program--such as the loop that calls FindDeclAndField.

See https://go-review.googlesource.com/c/tools/+/221021 for
background on the previous implementation.

Change-Id: I745ecc4e65378fbe97f456228cafba84105b7e49
Reviewed-on: https://go-review.googlesource.com/c/tools/+/416880
Auto-Submit: Alan Donovan <adonovan@google.com>
Run-TryBot: Alan Donovan <adonovan@google.com>
TryBot-Result: Gopher Robot <gobot@golang.org>
gopls-CI: kokoro <noreply+kokoro@google.com>
Reviewed-by: Robert Findley <rfindley@google.com>
2022-07-13 14:49:57 +00:00
Alan Donovan 71dc5e295f internal/lsp/cache: make snapshot reference counting uniform
Previously, snapshots were born with a reference count of zero.
Although leases were created and returned by functions that
return a snapshot, and correctly disposed of by the caller, the
view did not hold a lease for its snapshot. The view's lease
on the snapshot was implicit, and for this reason the view
made explicit calls to Destroy when these implicit leases ended,
which would then wait for all explicit leases to end.

Now that the view holds an explicit lease to its snapshot, it is
safe (as a follow-up change) to move the destroy logic into the
call of release() that brings the refcount to zero.

Also:
- clarify that release functions should be called when
  and only when err is nil.
- in View: remove unused View.cancel field.
- in tempModFile: clarify tricky return + defer + named-result-var statement.
- in DidModifyFiles: simplify type of releases from []func() to func().
- in Server.addFolders: fix reference leak (looks minor).

Change-Id: Ibf61f4ce109e91060e2ccd854c32214b119f2f0a
Reviewed-on: https://go-review.googlesource.com/c/tools/+/416875
Reviewed-by: Robert Findley <rfindley@google.com>
Auto-Submit: Alan Donovan <adonovan@google.com>
gopls-CI: kokoro <noreply+kokoro@google.com>
Run-TryBot: Alan Donovan <adonovan@google.com>
TryBot-Result: Gopher Robot <gobot@golang.org>
2022-07-11 18:57:05 +00:00
Alan Donovan 53ead67a98 internal/memoize: delete Generation and Bind
Now that the lifetime of all handles in the store is
determined by reference counting, we no longer need
the generation feature.

The Arg interface, renamed RefCounted, is now optional,
and causes the lifetime of the argument to be extended
for the duration of the Function call.  This is important
when the Get(ctx) context is cancelled, causing the
function call to outlive Get: if Get's reference to
the argument was borrowed, it needs to increase the
refcount to prevent premature destruction.

Also:
- add missing snapshot.release() call in
  importsState.populateProcessEnv.
- remove the --memoize_panic_on_destroyed flag.

Change-Id: I0b3d37c16f8b3f550bb10120c066b628c3db244b
Reviewed-on: https://go-review.googlesource.com/c/tools/+/416076
Run-TryBot: Alan Donovan <adonovan@google.com>
TryBot-Result: Gopher Robot <gobot@golang.org>
Auto-Submit: Alan Donovan <adonovan@google.com>
Reviewed-by: Robert Findley <rfindley@google.com>
gopls-CI: kokoro <noreply+kokoro@google.com>
2022-07-08 19:22:01 +00:00
Alan Donovan 8746177218 internal/lsp/cache: simplify ParseGo
This change simplifes the ParseGo interface to
make it consistent with the other handle+map operations:

- ParseGoImpl is the basic parser.
- The 'fixed' bool result is a field of ParsedGoFile.
- ParseGo is the caching wrapper.
  The map accessors have been inlined into it.
- goFiles (renamed parsedGoFiles) is now just a bare
  persistent.Map.
- parseGoHandle is replaced by *memoize.Handle
- the operations of "make a handle" and "wait for it"
  are no longer separate (since clients never want
  one without the other).
- cachedPGF and peekOrParse have been combined into
  peekParseGoLocked.

Change-Id: If01a6aaa7e6a8d78cb89c305e5279738e8e7bb55
Reviewed-on: https://go-review.googlesource.com/c/tools/+/416223
TryBot-Result: Gopher Robot <gobot@golang.org>
Reviewed-by: Robert Findley <rfindley@google.com>
gopls-CI: kokoro <noreply+kokoro@google.com>
Run-TryBot: Alan Donovan <adonovan@google.com>
2022-07-08 18:52:03 +00:00
Alan Donovan 8184d1ff7a internal/lsp/cache: use GetHandle not Bind in astCacheData
This change replaces Bind (generational lifetime) with GetHandle
(reference counting) for the cache of buildASTCache calls, as
Bind is deprecated.

Also:
- add missing commentary, particularly on the question of why
  this cache is needed at all.
- remove unused field astCacheData.err
- simplify SignatureHelp to avoid unnecessary use of Declaration.
- minor simplifications to logic surrounding FindPackageFromPos
  and PosTo{Decl,Field}.

Change-Id: I2b7a798b84f23856037797fa6e9ccc5595422e7c
Reviewed-on: https://go-review.googlesource.com/c/tools/+/415975
Reviewed-by: Robert Findley <rfindley@google.com>
Run-TryBot: Alan Donovan <adonovan@google.com>
TryBot-Result: Gopher Robot <gobot@golang.org>
Auto-Submit: Alan Donovan <adonovan@google.com>
gopls-CI: kokoro <noreply+kokoro@google.com>
2022-07-07 02:48:48 +00:00
Ruslan Nigmatullin fa4babcd9a internal/lsp/cache: use persistent map for storing packages in the snapshot
This on average reduces latency from 25ms to 12ms on internal codebase.

Updates golang/go#45686

Change-Id: I49c8f09f8e54b7b486d7ff7eb8f4ba9f0d90b278
Reviewed-on: https://go-review.googlesource.com/c/tools/+/413655
gopls-CI: kokoro <noreply+kokoro@google.com>
Run-TryBot: Robert Findley <rfindley@google.com>
TryBot-Result: Gopher Robot <gobot@golang.org>
Reviewed-by: Robert Findley <rfindley@google.com>
Reviewed-by: Alan Donovan <adonovan@google.com>
2022-07-01 13:37:03 +00:00
Ruslan Nigmatullin f60e9bc48f internal/lsp/cache: use persistent map for storing gofiles in the snapshot
Use treap (https://en.wikipedia.org/wiki/Treap) as a persistent map to avoid copying s.goFiles across generations.
Maintain an additional s.parseKeysByURIMap to avoid scanning s.goFiles on individual file's content invalidation.

This on average reduces didChange latency on internal codebase from 160ms to 150ms.

In a followup the same approach can be used to avoid copying s.files, s.packages, and s.knownSubdirs.

Updates golang/go#45686

Change-Id: Ic4a9b3c8fb2b66256f224adf9896ddcaaa6865b1
GitHub-Last-Rev: 0abd2570ae9b20ea7126ff31bee69aa0dc3f40aa
GitHub-Pull-Request: golang/tools#382
Reviewed-on: https://go-review.googlesource.com/c/tools/+/411554
Reviewed-by: Robert Findley <rfindley@google.com>
gopls-CI: kokoro <noreply+kokoro@google.com>
Reviewed-by: Alan Donovan <adonovan@google.com>
Run-TryBot: Robert Findley <rfindley@google.com>
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2022-06-22 21:10:11 +00:00
Alan Donovan 63d8015eb8 internal/lsp/cache: minor simplifications to Symbols
Minor cleanups based on studying the code in preparation
for saving a persistent index:

- Remove unused error result from Symbols method.
- Remove unnecessary fields from symbolHandle.
- Add various explanatory comments.
- In workspace_symbols.go:
  - separate extract and match phases of collectSymbols clearly
  - replace symbolCollector and matchWorker types by simple parameters
  - combine loops (roots, buildMatcher)
  - move buildMatcher creation down to where it is needed.

Change-Id: Ifcad61a9a8c7d70f573024bcfa76d476552ee428
Reviewed-on: https://go-review.googlesource.com/c/tools/+/412822
Reviewed-by: Robert Findley <rfindley@google.com>
2022-06-21 20:15:42 +00:00
Alan Donovan a41fc9869a internal/lsp/cache: use [256]byte Hash instead of hex digit string
I had hoped to see a reduction in total allocation, but it does not
appear to be significant according to the included crude benchmark.
Nonetheless this is a slight code clarity improvement.

Change-Id: I94a503b377dd1146eb371ff11222a351cb5a43b7
Reviewed-on: https://go-review.googlesource.com/c/tools/+/411655
TryBot-Result: Gopher Robot <gobot@golang.org>
Run-TryBot: Robert Findley <rfindley@google.com>
gopls-CI: kokoro <noreply+kokoro@google.com>
Reviewed-by: Robert Findley <rfindley@google.com>
2022-06-13 13:05:07 +00:00
Alan Donovan 9651276d64 internal/lsp/cache: optimize Snapshot.clone
This change replaces the single large map used for snapshot.goFiles
by a map of 256 stripes, each of which becomes immutable once shared.
This optimizes the common case in which the copy is nearly identical
to the original.

We still need to visit each map entry to see whether it needs to be
deleted (which is rare) and to inherit the handle in the usual case.
This is now done concurrently.

Also, share the (logically immutable) []PackageIDs slices across
old and new snapshots. This was worth 5% of CPU and 1/3 of allocations
(all small).

Benchmark on darwin/arm64 shows a 29% reduction for DidChange.

$ go test -v ./gopls/internal/regtest/bench -run=TestBenchmarkDidChange -didchange_dir=$HOME/w/kubernetes -didchange_file=pkg/util/hash/hash.go

Before:
BenchmarkStatistics	     100	  22955469 ns/op	11308095 B/op	   47412 allocs/op
BenchmarkStatistics	     100	  23454630 ns/op	11226742 B/op	   46882 allocs/op
BenchmarkStatistics	     100	  23618532 ns/op	11258619 B/op	   47068 allocs/op

After goFilesMap:
BenchmarkStatistics	     100	  16643972 ns/op	 8770787 B/op	   46238 allocs/op
BenchmarkStatistics	     100	  17805864 ns/op	 8862926 B/op	   46762 allocs/op
BenchmarkStatistics	     100	  18618255 ns/op	 9308864 B/op	   49776 allocs/op

After goFilesMap and ids sharing:
BenchmarkStatistics          100          16703623 ns/op         8772626 B/op      33812 allocs/op
BenchmarkStatistics          100          16927378 ns/op         8529491 B/op      32328 allocs/op
BenchmarkStatistics          100          16632762 ns/op         8557533 B/op      32497 allocs/op

Also:
- Add comments documenting findings of profiling.
- preallocate slice for knownSubdirs.
- remove unwanted loop over slice in Generation.Inherit

Updates golang/go#45686

Change-Id: Id953699191b8404cf36ba3a7ab9cd78b1d19c0a2
Reviewed-on: https://go-review.googlesource.com/c/tools/+/410176
TryBot-Result: Gopher Robot <gobot@golang.org>
Reviewed-by: Robert Findley <rfindley@google.com>
gopls-CI: kokoro <noreply+kokoro@google.com>
Run-TryBot: Alan Donovan <adonovan@google.com>
2022-06-10 17:57:19 +00:00
Robert Findley 37590b385d gopls: remove usage of golang.org/x/xerrors
As of golang/go#50827, gopls no longer supports building at 1.12, and so
usage of golang.org/x/xerrors can be replaced with the native support for
error wrapping introduced in Go 1.13.

Remove this usage as a step toward eliminating the xerrors dependency
from x/tools.

For golang/go#52442

Change-Id: Ibf459cc72402a30a6c2735dc620f76ed8a5e2525
Reviewed-on: https://go-review.googlesource.com/c/tools/+/401097
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Reviewed-by: Ian Lance Taylor <iant@google.com>
2022-04-20 15:33:22 +00:00
Robert Findley b2552ef554 internal/lsp: run go mod vendor exclusively to avoid file contention
Running go mod vendor can result in vendor/modules.txt being transiently
deleted while it is being updated. On Windows this introduces potential
problems with file locking, if modules.txt is being read by another go
process, such as an ongoing package load.

Change the command to use RunGoCommandPiped, which executes serially
within the gopls process.

For golang/go#49646

Change-Id: If2d1fe5431122ba05014051a0e9c303cf7ee9cb2
Reviewed-on: https://go-review.googlesource.com/c/tools/+/399714
Run-TryBot: Robert Findley <rfindley@google.com>
Reviewed-by: Bryan Mills <bcmills@google.com>
gopls-CI: kokoro <noreply+kokoro@google.com>
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2022-04-11 22:06:59 +00:00
Dan Kortschak 4077921f14 all: fix spelling
Change-Id: I13cf73d7e043dda1a06c28bb09e413a76a68df1f
Reviewed-on: https://go-review.googlesource.com/c/tools/+/391934
Reviewed-by: Ian Lance Taylor <iant@golang.org>
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2022-04-04 19:50:34 +00:00
Michael Matloob 121d1e448f internal/lsp: report diagnostics on go.work files
Report diagnostics on use lines where the directory doesn't have a
go.mod file, and on syntax errors in go.work.

For golang/go#50930

Change-Id: Idab36b43d86c4842f8eecd5c071ce0587e6f27b3
Reviewed-on: https://go-review.googlesource.com/c/tools/+/389317
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2022-03-04 18:29:58 +00:00
Robert Findley 5210e0ca15 gopls: wire in LangVersion and ModulePath for gofumpt formatting
If available, pass the LangVersion and ModulePath provided by
go/packages to gofumpt. This allows gofumpt to apply additional
formatting rules that require this information.

Also add a regression test for gofumpt formatting.

Fixes golang/go#51327

Change-Id: I47c8c96d595d62e1c444285ce69ce6a4e61fa74c
Reviewed-on: https://go-review.googlesource.com/c/tools/+/387634
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2022-02-24 18:08:50 +00:00
Michael Matloob be40034de7 internal/lsp: add support for formatting go.work files
Wired through support for calling x/mod's go.work formatter on go.work
files into LSP. Tested it by hand in editor using the "Format Document"
command. Added a test case to workspace_test regtest, though I'm not
totally sure the test is correct.

For golang/go#50930

Change-Id: Ied052ded514bb36f561737698f0e2d7b488158e7
Reviewed-on: https://go-review.googlesource.com/c/tools/+/383774
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2022-02-15 17:15:32 +00:00
Robert Findley 8305295d5d gopls: recognize the go.work file type
For golang/go#50930

Change-Id: I5bae56853f1e913fccd559d2a553ced4200bcb35
Reviewed-on: https://go-review.googlesource.com/c/tools/+/382237
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2022-02-04 14:03:20 +00:00
Robert Findley 3e30e21b53 gopls: remove the workspace_metadata command
Remove the workspace_metadata command, as VS Code no longer needs this
to run workspace commands (it can use go.work instead).

Updates golang/go#44696

Change-Id: Ife579a15e64969c4301e4508e18b7c8a8b633b9f
Reviewed-on: https://go-review.googlesource.com/c/tools/+/382235
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2022-02-04 14:02:58 +00:00
Robert Findley 4da8ceb6f1 internal/lsp/source: remove the unused UpdateUserModFile invocation flag
Change-Id: I4325417e4d97d3ab82551c2fa0382aa3d962a781
Reviewed-on: https://go-review.googlesource.com/c/tools/+/382077
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2022-02-03 22:05:07 +00:00
pjw 772a39974b internal/template: return a Source with template diagnostics
Template diagnostics now return Soure 'template' instead of no Source.

Fixes golang/go#50786

Change-Id: Ifd7f26ffcee238b7168667c259c6b0006f8c03e6
Reviewed-on: https://go-review.googlesource.com/c/tools/+/380974
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2022-01-26 16:53:13 +00:00
Robert Findley 3f6aab191a internal/lsp: honor the file kind provided by clients for overlays
Honor the file kind provided by clients for overlays, by passing the
FileHandle into View.FileKind and checking for overlays.

For golang/vscode-go#1957

Change-Id: I4a767cb64dc5205f1d10c3126a2cbe67c21a34e4
Reviewed-on: https://go-review.googlesource.com/c/tools/+/378314
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2022-01-13 20:54:45 +00:00
pjw 68b574acb9 internal/template: identify template files by the templateExtensions option
Make the language id (sent from the client) 'gotmpl' equivalent to 'tmpl'

Wherever a view is known, use its options to determine which files
are template files. Whenever the client sends an explicit
languageID, use that.

Partially fixes golang/vscode-go#1957

Change-Id: I04cd630d6c6c80e0a78c2fafb6ddc1166ce86829
Reviewed-on: https://go-review.googlesource.com/c/tools/+/376854
Trust: Peter Weinberger <pjw@google.com>
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2022-01-13 17:30:17 +00:00
Rebecca Stambler 4ea6123e07 internal/lsp: don't add multiple views for the same folder
When we add a view, we should check if we already have a view for the
given folder.

Updates golang/go#48844

Change-Id: I0de27d420e2b4df3b33b913ae27b108bab6b7d12
Reviewed-on: https://go-review.googlesource.com/c/tools/+/356933
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2021-10-19 23:27:41 +00:00
Robert Findley e5f719fbe6 internal/lsp/source: consider test variants when finding pkg from pos
When resolving a position to a package we must consider all packages,
including intermediate test variants. This manifests, for example, when
jumping to definition in a package that is imported as a test variant
(see golang/go#47825).

For now, fix this by threading through an 'includeTestVariants' flag to
PackagesForFile. This isn't pretty, but should be a trivially safe
change: the only effect will be to increase the number of packages
considered in FindPackageFromPos. Since we are discussing future changes
to the API for querying packages from the snapshot, now did not seem
like a good time to undertake significant refactoring.

A regtest based on the original issue is included.

This CL is joint with rstambler@golang.org.

Fixes golang/go#47825

Co-authored-by: Rebecca Stambler <rstambler@golang.org>
Change-Id: I4693ec69b50ed4acd569cff87883769c1edf332b
Reviewed-on: https://go-review.googlesource.com/c/tools/+/347563
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2021-09-08 14:51:59 +00:00
Rob Findley a55d5155d9 internal/lsp: export and move some objects related to metadata
In preparation for moving metadata related functionality to a separate
package, move around some types and export some symbols. This is purely
to reduce diffs in subsequent CLs, and contains no functional changes.

Change-Id: I24d4fbd71df78e4d7a84f6598cdf820b41d542a2
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2021-08-15 15:51:49 +00:00
Rob Findley 0f3931c766 internal/lsp: precompute workspace symbols
Coupling workspace symbols to package checking means that they do not
function when the workspace is contracted, and also forces us to do
duplicate work traversing file declarations.

This CL changes the workspace symbol implementation to precompute
symbols based only on syntactic information, allowing them to function
in degraded workspace mode, improving their performance, and laying the
groundwork for more significant performance improvement later on.

There is some loss of precision where we can't determine the kind of a
symbol from syntactic information alone, but this is minor: we fall back
on 'Class' if we can't determine whether a type definition is a basic
type, struct, or interface.

Benchmark ("test" in x/tools): 56ms->40ms
Benchmark ("test" in kuberneted): 874ms->799ms

Change-Id: Ic48df29b387bf029dd374d7d09720746bc27ae5e
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2021-08-09 20:20:17 +00:00
Rob Findley 07bc1bf47f internal/lsp: in degraded mode, limit the workspace to active packages
In my testing, the gopls degraded memory mode (currently set via
"memoryMode": "DegradeClosed") did not save as much memory as expected
due to still type checking all packages in the workspace (even if in
ParseExported mode). It is also annoying to get incomplete results from
references and renaming.

I think we can (and should) fix both problems: don't even consider
packages that aren't 'reachable' via open files, but fully type check
the reverse transitive closure of the packages you're working on. This
CL does exactly that, by swapping out the concept of 'workspace
packages' with 'active packages'.

In testing, this decreased my memory footprint while working on std by
3-4x when compared to normal mode, and 2x when compared to the previous
implementation of DegradeClosed.

It still needs more testing before we move this option out of
experimental.

For golang/go#46902

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2021-07-26 20:36:31 +00:00
Rob Findley d36a54b56b internal/lsp: improve package search in a couple places
When we open a file in a package, independent of whether it is in the
workspace, we type check in ParseFull mode. However, several other
code paths don't find this better parse mode.

We need a better abstraction, but for now improve a couple code paths
specifically for the purpose of fixing Hover content.

Updates golang/go#46158
Updates golang/go#46902

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2021-07-13 13:36:40 +00:00
Rebecca Stambler 116feaea45 internal/lsp: move the progress tracker to the session
Sometimes, we may want to report progress from functions inside of the
cache package, so move the progress tracker to the session to allow for
that.

Change-Id: I15409577a7a5080e7f0224a95d159de42856ffa7
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2021-06-16 01:01:29 +00:00
Rebecca Stambler 4b484fb136 internal/lsp: exclude the module cache from the workspace
This change treats the GOMODCACHE like a directory filter, and it
excludes any modules under the module cache from being considered part
of the workspace. This can happen when users open their entire GOPATH.

To do this, I had to propagate the view's root and gomodcache through
the exclusion functions, and I also had to add BuildGoplsMod to the
snapshot's interface.

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2021-06-11 17:18:39 +00:00
Dominik Honnef 917abfb0e7 gopls: propagate Staticcheck's diagnostic severities
Each analyzer in Staticcheck is annotated with the appropriate
severity to use for its diagnostics. For example, most checks in SA*
produce warnings, but some produce errors (e.g. when passing an
invalid regular expression to regexp.Compile).

This will be especially important for a follow-up CL that enables
Staticcheck's new quickfix category, which contains optional
refactorings that shouldn't be flagged as warnings.

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2021-05-25 19:05:09 +00:00
Heschi Kreinick cd1d0887dc internal/lsp/cache: trim more stuff in ParseExported mode
Despite the name, ParseExported only hollowed out declarations -- it
didn't actually drop any from the AST. This leaves a fair amount of
unexported crud behind. Unfortunately, there are a *lot* of ways to
expose an unexported declaration from an exported one, and it can be
done across files. Because of that, discarding unexported declarations
requires a lot of work.

This CL implements a decent attempt at pruning as much as possible from
the AST in ParseExported mode.

First, we analyze the AST of all the files in the package for exported
uses of unexported identifiers, iterating to a fixed point. Then, we
type check those ASTs. If there are missing identifiers (probably due to
a bug in the dependency analysis) we use those errors to re-parse. After
that we give up and fall back to the older, less effective trimming. The
pkg type changes slightly to accomodate the new control flow.

We have to analyze all the files at once because an unexported type
might be exposed in another file. Unfortunately, that means we can't
parse a single file at a time any more -- the result of parsing a file
depends on the result of parsing its siblings. To avoid cache
corruption, we have to do the parsing directly in type checking,
uncached.

This, in turn, required changes to the PosTo* functions. Previously,
they operated just on files, but a file name is no longer sufficient to
get a ParseExported AST. Change them to work on Packages instead. I
squeezed in a bit of refactoring while I was touching them.

Change-Id: I61249144ffa43ad645ed38d79e873e3998b0f38d
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2021-05-11 17:48:41 +00:00
Peter Weinbergr 7cab0ef2e9 internal/lsp: support template files
Provide some support for template files, implementing most of
https://docs.google.com/document/d/1clKAywucZVBXvL_v4mMhLQXso59lmQPMk1gtSpkV-Xw

Template support is controlled by the option 'experimentalTemplateSupport'
which defaults to false.

Most of the code is in a new 'template' package. Implemented are
semantic tokens, diagnostics, definitions, hover, and references,
and there is a stub for completions.

This code treats all the template files of a package together, so as
to follow cross-references.

Change-Id: I793606d8a0c9e96a0c015162d68f56b5d8599294
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2021-05-05 01:45:45 +00:00
Rob Findley 7a6108e9b2 internal/lsp: don't use ast.NewPackage to build builtin
ast.NewPackage mutates the input files, making it difficult to avoid
races with our caching model. I had avoided a race resulting from cache
handle cancellation, just to run into another race in multi-session
servers.

But there's no reason to use ast.NewPackage when we only have a single
file. We can just interrogate the file scope wherever needed.

Fixes golang/go#45868

Change-Id: I521475b51ee3b1c3e408916affecafbc629b0191
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2021-04-30 20:08:34 +00:00
Rob Findley 28c1392e35 internal/lsp: don't call PackagesForFile on builtin.go
Calling PackagesForFile on builtin.go loads is at a
command-line-arguments package, which has many type checking errors.

Add a new snapshot method IsBuiltin, which is used to avoid calling
PackagesForFile on builtin.go when diagnosing changed files or checking
for orphaned files. There may be other places where this should be used,
but this functionality can't reasonably be pushed down, as
PackagesForFile should always return something.

This exacerbated an existing race to building the builtin, because
ast.NewPackage unfortunately mutates the ast.File. Fix this by just
building the builtin package directly when building the handle. It
should be very fast.

Fixes golang/go#44866

Change-Id: Ie6c07478493fa011e92e6966289c2fa822d87b35
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2021-04-29 13:06:21 +00:00
Rebecca Stambler 09a00c1ab1 internal/lsp: fix support for SourceFixAll code actions
Some of the refactoring changed the way that we label code action kinds,
and we need to add quickfix and fixall kinds for each diagnostic type.
Support a per-kind suggested fix, and fix a small issue in setting the
analyzer for a fixall code action.

Fixes golang/go#45111

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2021-03-24 23:51:27 +00:00
Rob Findley 6d45e3d999 internal/lsp: add a temp workspace per folder, and a helper command
Locating the workspace module by convention has multiple problems:
 + gopls's view of $TMPDIR might be different from the client
 + there might be multiple views
 + there might be multiple gopls sessions per pid

Instead, assign a temp workspace directory for each workspace folder,
and provide a command to access this information.

Cleaning up all these temp directories was overcomplicated. Instead,
create a temp directory for the gopls server to nest them under, that
can be removed up on server shutdown.

Also fix a bug where the snapshot was not acquired before copying its
workspace.

Updates golang/go#42252

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2021-03-15 23:11:33 +00:00
Heschi Kreinick 11e8f6b853 internal/lsp: refactor codeAction
As much as possible, try to unify the codeAction code paths. We always
run analysis now. And rather than assuming certain categories of
analyzers will generate certain kinds of code actions, mark them
explicitly and use that information to filter the actions afterward.

Change-Id: I8154cd67aa8b59b2a6c8aa9c3ea811de2e190db4
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2021-03-10 19:04:36 +00:00
Heschi Kreinick 376db57240 internal/lsp: use pre-existing quick fixes for analysis diagnostics
Now that we're generating quick fixes at analysis time, we can use those
in code action requests and delete a fair amount of redundancy. The
codeAction function is a little cluttered, but I want to get it all in
one place before I decide how to split it up.

Change-Id: Icd91e2547542cce0a05c18c02a088833f71232a4
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2021-03-03 21:54:20 +00:00
Heschi Kreinick 144d5ced6b internal/lsp: run type error analyzers as part of diagnostics
Type error analyzers can be viewed as enhancing type errors, rather
than analyzers in their own right. Create a source.DiagnosePackage
function that combines the list/parse/typecheck diagnostics with type
error analyzers. This allows us to remove some special cases from the
analysis path, and is a first step in removing all the special
handling for analysis quick fixes.

Along the way:
Pass pointers to source.Analyzer after I spent half an hour chasing a
loop capture bug. Spend a further 2-3 hours chasing slowdown in the
command tests as a result.

Move Unnecessary tag generation into diagnostic creation rather than
as a mutating post-processing step that required cloning diagnostics.

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2021-03-03 21:51:40 +00:00
Heschi Kreinick 24439e3c78 internal/lsp/source: eliminate GetTypeCheckDiagnostics
Most callers of source.Package.GetDiagnostics do it via
GetTypeCheckDiagnostics. Push its logic up or down as appropriate and
delete it.

Rather than requiring fully populated maps of diagnostics, which was
rather subtle, call storeDiagnostics for every Go file in the package.

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2021-03-03 21:21:28 +00:00
Heschi Kreinick 47985cf3c7 internal/lsp/cache: refactor Go file parsing
Hopefully improve some of the details around parsing that have always
confused me.

- parser.ParseFile will never return an error other than
scanner.ErrorList. Encode that in ParsedGoFile.
- parser.ParseFile will never return a nil file. Eliminate the code
path that handled that.
- Explain why we might fail to find a token.File.
- Trying to fix errors appears quite expensive even if there aren't any
to fix. Don't waste the time.

Change-Id: I87e082ed52c98a438bc7fd3b29e1a486f32fb347
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2021-03-02 02:05:01 +00:00
Heschi Kreinick eb48d3f608 internal/lsp/cache: refactor diagnostic suppression
In typeCheckDiagnostics, we have logic to suppress go list and type
checking errors based on the presence of other errors. Nobody seems to
know why the logic is exactly what it is, and suppressing list errors
means that bad //go:embed patterns don't show up.

Intuitively, it makes sense to me that we don't want to type check if
listing or parsing fails: list errors mean that whole files may be
missing, and parsing errors may wipe out arbitrary chunks of files.
There's little point reporting errors from type checking that. However,
list errors and parse errors should be mostly orthogonal: go list
parses very little of the file and in practice only reports errors
parsing the package statement. So, at least for now, we report both
parse and list errors, and stop there if there are any.

Finally, move the suppression logic to the actual typeCheck function
that generates the diagnostics. typeCheckDiagnostics is the primary
consumer, but I think it's better to do the suppression at the source.

Because we are now showing list errors, and they are prone to getting
stuck due to bad overlay support, a couple of tests now require 1.16.

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2021-03-02 01:39:17 +00:00
Heschi Kreinick 706a59cbbb internal/lsp: apply go.mod/sum changes via workspace edits
We currently write directly to go.mod/sum via the go command, expecting
that editors will pick up the changes. While that's true for VS Code,
vim doesn't necessarily reload unchanged buffers. Change to send
explicit edits instead, but only if the file is open. Behavior when
using Go versions that don't support -modfile is unchanged.

Fixes golang/go#44035.

Change-Id: Ie4e5cf60673b860f5dfcbdb726bee0efe6aae405
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2021-02-11 05:13:29 +00:00
Rob Findley 8aef11fa67 internal/lsp: switch to the new command API
Fully switch to the new generated command API, and remove the old
dynamic command configuration.

This involved several steps:
 + Switch the command dispatch in internal/lsp/command.go to go through
   the command package. This means that all commands must now use the new
   signature.
 + Update commandHandler to use the new command signatures.
 + Fix some errors discovered in the command interface now that we're
   actually using it.
 + Regenerate bindings.
 + Update all code lens and suggested fixes to new the new command
   constructors.
 + Generate values in the command package to hold command names and the
   full set of commands, so that they may be referenced by name.
 + Update any references to command names to use the command package.
 + Delete command metadata from the source package. Rename command.go to
   fix.go.
 + Update lsp tests to execute commands directly rather than use an
   internal API. This involved a bit of hackery to collect the edits.
 + Update document generation to use command metadata. Documenting the
   arguments is left to a later CL.
 + Various small fixes related to the above.

This change is intended to be invisible to users. We have changed the
command signatures, but have not (previously) committed to backwards
compatibility for commands. Notably, the gopls.test and gopls.gc_details
signatures are preserved, as these are the two cases where we are aware
of LSP clients calling them directly, not from a code lens or
diagnostic.

For golang/go#40438

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2021-02-09 22:09:28 +00:00
Heschi Kreinick e7dfe0279f internal/lsp: remove redundant fields/code after source.Error deletion
Collapse Diagnostic.Kind, Source, and Category into just Source. Remove
code that converted from Diagnostic to Diagnostic. Notes on the changes
I had to make along the way:

- We used to use Kind to determine Severity. Set Severity when the
Diagnostic is created instead.
- Use constants for Source as much as possible -- we still need to use
Analyzer.Name for analysis diagnostics. It would be nice to break that
dependency so that Source was totally opaque, but that's a separate
issue.
- Introduce a new Source for gc_details, "optimizer details". It was "go
compiler" previously.
- Some of the assignments are a little arbitrary. Is inconsistent
vendoring really a "go list" error?
- GetTypeCheckDiagnostics had code to cope with diagnostics that had no
URI associated with them. We now spread such diagnostics to all files
when they are generated.
- Analyze modifies Diagnostics by adding a Tag to them. That means it
has to own them, so I had it clone them. I would like to push that logic
down to the diagnostics, per the TODO, but that's another CL.

And some observations:
- It's obviously tempting to combine DiagnosticSource and
diagnosticSource, but they mean very different things. I'm open to a
better name for one or the other.

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2021-02-02 23:37:55 +00:00
Heschi Kreinick 51ce8377eb internal/lsp: remove the source.Error type
source.Error and source.Diagnostic are almost identical types, used
arbitrarily in different parts of the code. This CL is the first step in
cleaning up that redundancy: it deletes the source.Error type.

To do that, I added the fields from source.Error to source.Diagnostic,
and made absolutely no other semantic code changes -- I just renamed
things that were named Error to Diagnostic. With only aesthetic concerns
in play, I hope this CL will be easy to review. The next CL will clean
up all the stupid-looking code that converts a Diagnostic to a
Diagnostic, etc.

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2021-02-02 20:40:51 +00:00
pjw c3402e3c42 internal/lsp: update to latest version of LSP protocol
The Typescript source is still at version 3.16, but there are new
requests, more detailed client capabilities, and an attempt to be
more specific about ranges of number in the Typescript code.

Vscode defines types integer and uinteger (32-bit signed and unsigned),
so the Go code now uses int32 and uint32.

They've changed the use of TextDocument, so version information is sometimes
missing. cache/session.go:625 was changed correspondingly.

This CL also make CodeAction.Disabled into a pointer.

New requests or notifications:
DidCreateFiles, DidRenameFiles, DidDeleteFiles (notifications)
ShowDocument, WillCreateFiles,WillRenameFiles, WillDeleteFiles (request)

It's a lot of code; I've probably missed something.

Change-Id: I8449ad8473ac00947d0344c5f6133f9bd73b9e10
Reviewed-on: https://go-review.googlesource.com/c/tools/+/286192
Run-TryBot: Peter Weinberger <pjw@google.com>
gopls-CI: kokoro <noreply+kokoro@google.com>
TryBot-Result: Go Bot <gobot@golang.org>
Reviewed-by: Rebecca Stambler <rstambler@golang.org>
Trust: Peter Weinberger <pjw@google.com>
2021-02-02 11:32:59 +00:00