Commit Graph

120 Commits

Author SHA1 Message Date
Suzy Mueller 46d1522a5d internal/lsp: add extract to method code action
"Extract method" allows users to take a code fragment and move it
to a separate method. This is available if the enclosing function
is a method.

Change-Id: Ib824f6b79b13ca73532223283a050946c90a47e7
Reviewed-on: https://go-review.googlesource.com/c/tools/+/330070
Trust: Suzy Mueller <suzmue@golang.org>
Run-TryBot: Suzy Mueller <suzmue@golang.org>
gopls-CI: kokoro <noreply+kokoro@google.com>
TryBot-Result: Go Bot <gobot@golang.org>
Reviewed-by: Rebecca Stambler <rstambler@golang.org>
2021-07-23 18:08:39 +00:00
Suzy Mueller ae0deb7a4c internal/lsp: fix variable reuse bug in code actions
Taking the address of the variables defined by range in a for loop is not
safe since they are reused. Get the address from the original slice.

Change-Id: If7fbf3fdbfeeaf329f36e416642582002895bbce
Reviewed-on: https://go-review.googlesource.com/c/tools/+/330649
Trust: Suzy Mueller <suzmue@golang.org>
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Reviewed-by: Rebecca Stambler <rstambler@golang.org>
2021-07-13 14:00:16 +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
Reviewed-on: https://go-review.googlesource.com/c/tools/+/297871
Run-TryBot: Peter Weinberger <pjw@google.com>
gopls-CI: kokoro <noreply+kokoro@google.com>
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Reviewed-by: Robert Findley <rfindley@google.com>
Trust: Peter Weinberger <pjw@google.com>
2021-05-05 01:45:45 +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

Change-Id: I6bb32c9aa7427b690f42910672d3139579e84478
Reviewed-on: https://go-review.googlesource.com/c/tools/+/303209
Trust: Rebecca Stambler <rstambler@golang.org>
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Reviewed-by: Heschi Kreinick <heschi@google.com>
2021-03-24 23:51:27 +00:00
Rebecca Stambler 2c4a88659b internal/lsp: remove module diagnostics from code actions
With -mod=readonly, all go.mod diagnostics are covered by go get quick
fixes on import statements, so we don't need to run `go mod tidy` on
save for Go files. The real issue with this bug is the call to
WorkspacePackages, which type checks every package in the workspace.

Fixes golang/go#45092

Change-Id: Ibb82a3e58ec345ebdb67c0cbef5e029dce2d5a30
Reviewed-on: https://go-review.googlesource.com/c/tools/+/303149
Trust: Rebecca Stambler <rstambler@golang.org>
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gopls-CI: kokoro <noreply+kokoro@google.com>
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Reviewed-by: Heschi Kreinick <heschi@google.com>
2021-03-18 22:41:28 +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
Reviewed-on: https://go-review.googlesource.com/c/tools/+/300170
Trust: Heschi Kreinick <heschi@google.com>
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Reviewed-by: Rebecca Stambler <rstambler@golang.org>
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
Reviewed-on: https://go-review.googlesource.com/c/tools/+/297532
Trust: Heschi Kreinick <heschi@google.com>
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Reviewed-by: Rebecca Stambler <rstambler@golang.org>
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.

Change-Id: Id246667a9dcf484dc79516f92d5524261c435794
Reviewed-on: https://go-review.googlesource.com/c/tools/+/297879
Trust: Heschi Kreinick <heschi@google.com>
Trust: Rebecca Stambler <rstambler@golang.org>
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Reviewed-by: Rebecca Stambler <rstambler@golang.org>
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.

Change-Id: If43b0cc922af1013e80f969362246538df14985b
Reviewed-on: https://go-review.googlesource.com/c/tools/+/297878
Trust: Heschi Kreinick <heschi@google.com>
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Reviewed-by: Robert Findley <rfindley@google.com>
2021-03-03 21:21:28 +00:00
Rebecca Stambler d459050367 internal/lsp: apply go.sum fixes to all modules in multi-module module
When go.sum updates are needed in experimental workspace module mode, we
don't necessarily know which module needs the correction. As a fix,
apply all of these fixes to each module in the multi-module workspace.

The "add dependency" quick fix also seems to be broken, but I'll fix
that in a separate CL.

Fixes golang/go#44097

Change-Id: Id4a6013f2aceb6b902dff3118b027f6cb99eb3c1
Reviewed-on: https://go-review.googlesource.com/c/tools/+/289772
Trust: Rebecca Stambler <rstambler@golang.org>
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Reviewed-by: Heschi Kreinick <heschi@google.com>
2021-02-10 01:33:22 +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

Change-Id: Ie1b92c95d6ce7e2fc25fc029d1f85b942f40e851
Reviewed-on: https://go-review.googlesource.com/c/tools/+/290111
Trust: Robert Findley <rfindley@google.com>
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Reviewed-by: Heschi Kreinick <heschi@google.com>
2021-02-09 22:09:28 +00:00
Rob Findley a30116df7a internal/lsp: eliminate funcs from commands, and refactor
appliesFn and suggestedFixFn were blocking eliminating the
source.Command dynamic configuration. Remove them, and along the way
refactor command dispatch to align better with the new
internal/lsp/command package.

This involved refactoring the internal/lsp/command.go as follows:
 - create a new commandHandler type, which will eventually implement
   command.Interface.
 - create a commandDeps struct to hold command dependencies.
 - move command functionality into methods on commandHandler.

Of these, there are likely to be at least a couple points of controvery:

I decided to store the ctx on the commandHandler, because I preferred it
to threading a context through command.Interface when it isn't needed.
We should revisit this in a later CL.

I opted for a sparse commandDeps struct, rather than either explicit
resolution of dependencies where necessary, or something more abstract
like a proper dependency resolution pattern. It saved enough boilerplate
that I deemed it worthwhile, but didn't want to commit to something more
sophisticated.

Actually switching to the internal/lsp/command package will happen in a
later CL.

Change-Id: I71502fc68f51f1b296bc529ee2885f7547145e92
Reviewed-on: https://go-review.googlesource.com/c/tools/+/289970
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Reviewed-by: Heschi Kreinick <heschi@google.com>
2021-02-09 22:07:08 +00:00
Heschi Kreinick 513be0a9d2 internal/lsp/cache: disable network for mod tidy diagnostics
The only thing that the mod tidy diagnostics use the network for is
adding dependencies, and we already have quick fixes for those. The one
exception is the case covered by TestBadlyVersionedModule, a dependency
that fails to declare one of its own dependencies and therefore requires
an indirect dependency in the workspace module. That only triggers an
error on the dependency's import statement, which the user will never
see.

Fortunately, the go command does expose these problems in the DepsErrors
field of the list response. Add an internal API to access that, and turn
it into diagnostics on both the file and the controlling go.mod.
Refactor the go get diagnostic generation so that it applies to both
modules and packages.

Fixes golang/go#38462.

Change-Id: Ie2af940087654682a40de9ecfccd46f404a88b60
Reviewed-on: https://go-review.googlesource.com/c/tools/+/289309
Trust: Heschi Kreinick <heschi@google.com>
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Reviewed-by: Rebecca Stambler <rstambler@golang.org>
2021-02-05 19:41:14 +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.

Change-Id: If2e861d6fe16bfd2e5ba216cf7e29cf338d0fd25
Reviewed-on: https://go-review.googlesource.com/c/tools/+/288215
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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.

Change-Id: I1298cc8144c686b8a37fc2cc106930105e511353
Reviewed-on: https://go-review.googlesource.com/c/tools/+/288214
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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
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2021-02-02 11:32:59 +00:00
Rebecca Stambler f31efc5a5c internal/lsp: add an orphaned file diagnostic for nested modules
This change adds a diagnostic and error message that appears when a user
edits a nested module in legacy mode. At first, I thought a diagnostic
would be enough, but it's actually quite difficult to spot it when you
have a bunch of "undeclared name" diagnostics caused by the nested
module, so I figured a progress bar error message would also be useful.

This error message just indicates to the user that they should open the
nested module as its own workspace folder.

Also, while debugging this, I noticed that command-line-arguments
packages can have test variants, which we were never handling.
So I addressed that in this change.

Fixes golang/go#42109

Change-Id: Ifa6f6af401a3725835c09b76e35f889ec5cb8901
Reviewed-on: https://go-review.googlesource.com/c/tools/+/275554
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2020-12-10 16:46:18 +00:00
Heschi Kreinick bd5d160bec internal/lsp: add go get quick fix on failing imports
With -mod=readonly set, we no longer automatically add new requires to
go.mod, even the temporary one. We have the go mod tidy code lens, but
that only works on saved files, even in 1.16 due to golang/go#42491.
Plus we may remove the code lens's network access in the future.

Add a simple quick fix for import errors that runs (the moral equivalent
of) go get on the missing import.

Change-Id: Id5764a37ce7db0dce5370da9d648462aefa2042b
Reviewed-on: https://go-review.googlesource.com/c/tools/+/274121
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2020-12-03 19:34:02 +00:00
Rebecca Stambler 4aa1a224cd internal/lsp: fix title for vendor suggested fix
Noticed that the message in VS Code is empty.

Change-Id: I5e0c6723be0fc376e2e01a3016127a0385a02866
Reviewed-on: https://go-review.googlesource.com/c/tools/+/272206
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2020-11-23 23:22:13 +00:00
Heschi Kreinick db3e1ec26d internal/lsp: use pointers to source.Error, and not to ErrorList
We should be consistent about whether we pass around Error or *Error.
*Error was somewhat more common, and its Error method has a pointer
receiver, so I picked *Error.

ErrorList, on the other hand, is usually dereferenced when used, and
slice headers are small enough to pass around casually. So switch that
over to a non-pointer and change its Error method to a value receiver.

Change-Id: I19e70201ed1d6ef36d217db21c9101bb810bcf0c
Reviewed-on: https://go-review.googlesource.com/c/tools/+/272092
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2020-11-23 19:09:50 +00:00
Heschi Kreinick 22bd85271a internal/lsp: remove organize imports action for go.mod
Per our discussion, it's too slow for a save hook.

Fixes golang/go#38209. (for real this time?)

Change-Id: I264c6d1590a374eff09b09cb1a9162e8e5ff2dc7
Reviewed-on: https://go-review.googlesource.com/c/tools/+/267682
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2020-11-04 19:38:57 +00:00
Rebecca Stambler 1f28ee6820 internal/lsp: change `go mod vendor` warning into a diagnostic
This CL uses the approach of a source.ErrorList for the `go mod vendor`
error--rather than a ShowMessageRequest. The suggested fix is a command
that runs `go mod vendor`, so I added a CommandFix to the source.Error
type.

I'm not sure if a diagnostic is better than a ShowMessageRequest--
perhaps it should be both?

Fixes golang/go#41819
Fixes golang/go#42152

Change-Id: I4ba2d7af0233f13583395e871166caed83454d6e
Reviewed-on: https://go-review.googlesource.com/c/tools/+/261737
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2020-11-02 00:57:53 +00:00
Heschi Kreinick 2c115999a7 internal/lsp: use the go command to fix go.mod files
Modifying go.mod files directly leaves go.sum unchanged, and therefore
in need of updates later. Leaving work for the users to clean up isn't
ideal, so it'd be better to use the go command to make modifications.

Unfortunately, the go command has something of a mind of its own. The
most obvious problem is that using go get to add a new require adds a
// indirect comment to that new require, and there's no way to prevent
it. The only thing we can do is add the require first, then use go get
to do nothing but update the go.sum file.

The other inherent problem is that the go command operates on files as
they exist on disk, not the in-memory versions. As discussed, we issue
an error for this case. The alternative would be to work on temporary
files based on the in-memory contents, but that would be much larger
change, so I'd rather not at least right now.

To support Commands for quick fixes, add a new Command field to
source.SuggestedFix, and use it when forming the CodeAction response.

Fixes golang/go#38209.

Change-Id: I0c13ea39199368623e7494e222ba38587323d417
Reviewed-on: https://go-review.googlesource.com/c/tools/+/265981
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2020-10-28 22:47:54 +00:00
Rob Findley 0a3dcccdcf internal/lsp/source: add a FileSource interface
Rename Snapshot.GetFile to GetVersionedFile, and make the signature of
GetFile consistent with the corresponding method on session and cache.
This allows algorithms that depend only on file state to be expressed
using this API. In a subsequent CL, this is used for building and
testing the workspace module.

Preeemptively add the FileSource interface for use in these algorithms.

Change-Id: I550906e554fd290dcdf4cac442d5f223e0f644c1
Reviewed-on: https://go-review.googlesource.com/c/tools/+/263522
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2020-10-19 16:07:06 +00:00
Pontus Leitzler 8c269738d7 gopls: add "go test" code action
This change adds "go test" as a code action and also introduce the
concept of explicit code actions, i.e. code actions that aren't returned
to the client unless it explicitly ask for it.

The purpose is to be able to have a mechanism that allows users to
execute a specific command in one shot, and future CL:s will add more of
the existing code lenses as explicit code actions. Code lenses can't be
used directly since they lack the range/kind combo to make them unique.

Updates golang/go#40438

Change-Id: I245df4e26c9e02e529662181e2c1bc44f999e101
Reviewed-on: https://go-review.googlesource.com/c/tools/+/259377
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2020-10-13 16:52:01 +00:00
Rebecca Stambler 5bd0538631 internal/lsp: move the workspaceMode into the snapshot
Workspace mode makes more sense as a property of the snapshot, since
it is determined based on the modules in the workspace. Move it to the
snapshot and enable the GOPATH to modules test. The mode switch means
that we may run `go mod` commands before a `go.mod` is on-disk, so add
handling for that case.

Also, remove the code added in CL 258121 to treat packages starting with
a "_/" the same way as command-line arguments--that's not actually
correct because perfectly valid packages can also have a "_/" package
path prefix.

Fixes golang/go#40340

Change-Id: I35044f5d108983ba00df1359698bf14217caa982
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2020-10-12 19:26:20 +00:00
Rebecca Stambler 96877f285f internal/lsp, gopls: require a "gopls_" prefix on all commands
Updated the generator to check for this. Necessary to fix command name
collision in VS Code Go. Not the nicest solution, but seemed like the
least invasive one.

The codelens configuration is a little strange now, with the "gopls_"
prefixes, but the alternative is adding the prefix when processing the
config and that would make the default look different from the example.

Fixes golang/go#41187

Change-Id: I5cf42f4a96f6252016dcd5c40a4ac401e1b30a8f
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2020-10-09 03:22:23 +00:00
Rebecca Stambler f1e51e6b94 internal/lsp: stop using modURI as much as possible
This change switches over load and RunProcessEnvFunc to use the
snapshot's modules instead of the view's modURI. These do not seem to
have been the racy parts of CL 257417.

Change-Id: I317a350fc4b0c62d77858455a0e2e61148804ecd
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2020-09-29 19:10:02 +00:00
Rebecca Stambler a0ef9b62de internal/lsp: prepare for deletion of view.modURI
Splitting this CL out of CL 257417 to minimize the number of changes.
A few of the view's methods are moved to the snapshot, as they will
soon rely on the snapshot's modules field. Some dead code is also
deleted.

We now populate the snapshot's modules field even when
ExperimentalWorkspaceModule is not true, but we stop looking for modules
after searching the view's root.

Change-Id: Id0068ec10fafcfa6f7694dfcb8aaee8cb025078f
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2020-09-28 20:19:43 +00:00
Rebecca Stambler 5d1fdd8fa3 internal/lsp: allow multiple go.mod files in a view
This change allows a view to have multiple go.mod files associated
with it. This doesn't actually make any changes in internal/lsp/cache
with regards to the view's modURI, but it does do the necessary plumbing
in the client packages.

The next CL will delete modURI.

Updates golang/go#32394

Change-Id: I2312efd69c364aed4244ee3769679885a1ebc7e4
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2020-09-25 19:12:24 +00:00
Danish Dua 8d73f17870 internal/lsp: move package selection to before type checking
This change moves package selection to before type checking so we don't
unnecessarily type-check both variants of a package. As a result, exec
time and memory usage for features making calls to GetParsedFile are cut
by half since we only type check either the narrowest or the widest
package.

Change-Id: Ifd076f8c38e33de2bd3509fe17feafccd59d7419
Reviewed-on: https://go-review.googlesource.com/c/tools/+/257240
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2020-09-24 22:42:22 +00:00
Rebecca Stambler 17fc728d0d internal/lsp: handle staticcheck in code actions
Missed this in CL 254038.

Change-Id: I485f6e9112628dc4ff83e7ea47b59b340742711f
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2020-09-14 16:17:55 +00:00
Rebecca Stambler 97363e29fc internal/lsp: handle staticcheck in didChangeConfiguration
As we have modified the ways that we control which analyzers get
executed for a given case, we have lost the behavior of enabling and
disabling staticcheck smoothly. This CL splits out the staticcheck
analyzers from the main group so that the "staticcheck" setting can
override whether or not a given staticcheck analysis is enabled.

Fixes golang/go#41311

Change-Id: I9c1695afe4a8f89cd0ee50a79e83b2f42a2c20cb
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2020-09-13 03:21:22 +00:00
Rebecca Stambler d179df38ff internal/lsp/cache: automatically construct the workspace module
This change adds an experimental configuration, which when enabled,
shifts gopls to operate in multi-module mode. It implements the
super-module as described in
https://github.com/golang/proposal/blob/master/design/37720-gopls-workspaces.md.
Replace directives are also added when a workspace module requires
another workspace module (which has not yet been mentioned in the design
doc).

A user-provided workspace gopls.mod file is not yet supported, as it is
not yet testable. Clients will need to add support for change
notifications for the gopls.mod once it is added.

Updates golang/go#32394

Change-Id: I5089358603bca34c5c8db9e5a00f93e1cca0b93f
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2020-09-11 04:00:25 +00:00
Heschi Kreinick d94536333c internal/lsp/cache: don't always type check in default mode
CL 248380 forced all type checking to be in the default workspace mode.
In that CL, I said I couldn't think of any features that would break. It
appears I didn't think very hard. Navigation features inside of
dependencies are something I use all the time and they broke.

Reintroduce the ability to get packages in a particular mode, and make
it convenient to get them in all relevant modes. Update some critical
features to do so, and add regression tests.

Fixes golang/go#40809.

Change-Id: I96279f4ff994203694629ea872795246c410b206
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2020-08-19 19:22:15 +00:00
Rebecca Stambler eb8585a966 internal/lsp: extend the mod handle functions to handle multiple files
In the past, we assumed that we would only run these functions on the
view's go.mod file. As we expand the concept of a view to possibly
include multiple go.mod files, we need to allow these functions to work
on multiple go.mod files.

Change-Id: If9e7d131007e0977fc48ee2264365773da7d41f7
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2020-08-12 18:23:14 +00:00
Josh Baum 5c72ddda61 internal/lsp: fix bug in extract variable edit positions
Previously, the suggested fix tests did not properly handle the case
in which one fix contained at least two edits. We also prevent
the server from panicing when we cannot extract the selection.

Change-Id: I38f7b6d871b2f2741349a3fd94fd95b396f5fd33
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2020-08-04 20:55:55 +00:00
Heschi Kreinick c9619e8fac internal/lsp: separate LSP files from FS files
FileHandle currently includes LSP-level information about Version and
Session. That's dangerous, because the cache operates in terms of
URIs and content only -- we explicitly want to share results across
sessions and versions if they happen to be the same.

Split the LSP information into separate types, VersionedFileHandle and
VersionedFileIdentity.

Change-Id: I158646b783375b58245468599301e2a29c657e71
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2020-08-03 22:16:06 +00:00
Heschi Kreinick 412b8bda49 internal/lsp/cache: ref-count snapshots
To manually collect cache entries, we need to know when a snapshot is
idle. Add a reference count in the form of a WaitGroup and keep track of
its uses. The pattern is that any time a snapshot is returned, it comes
with a release function that decrements the ref count.

Almost all uses of a snapshot originate in a user-facing request,
handled in beginFileRequest. There it's mostly an exercise in passing
Snapshots around instead of Views.

In the other places I took the path of least resistance. For file
modifications I tried to minimize the amount of code that needed to deal
with snapshots. For diagnostics I just acquired the snapshot at the
diagnostics call.

Change-Id: Id48a2df3acdd97f27d905e2c2be23072f28f196b
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2020-08-03 22:08:54 +00:00
Heschi Kreinick 6467de6f59 internal/lsp: remove Mod handles
Continuing the massacre, remove ParseModHandle, and Mod*Handle, from the
source API.

Notably, having the snapshot available means we can simplify the go
command invocation paths a lot.

Change-Id: Ief4ef41e42f93d653f719a230004861e5e1ef70b
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2020-07-29 19:44:36 +00:00
Heschi Kreinick b6476686b7 internal/lsp: remove PackageHandle
Just like ParseGoHandle, PackageHandle isn't very useful as part of the
public API. Remove it.

Having PackagesForFile take a URI rather than a FileHandle seems
reasonable, and made me wonder if that logic applies to other calls like
ParseGo. For now I'm going to stop here. I could also revert that part
of the change.

Change-Id: Idba8e9fdba0b0c48e841a698eb97e47fd5f23cf5
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2020-07-28 17:35:25 +00:00
Heschi Kreinick 72051f7961 internal/lsp: pass snapshot/view to memoize.Functions
Due to the runtime's inability to collect cycles involving finalizers,
we can't close over handles in memoize.Functions without causing memory
leaks. Up until now we've dealt with that by closing over all the bits
of the snapshot that we want, but it distorts the design of all the code
used in the Functions.

We can solve the problem another way: instead of closing over the
snapshot/view, we can force the caller to pass it in. This is somewhat
scary: there is no requirement that the argument matches the data that
we're working with. But the reality is that this is not a new problem:
the Function used to calculate a cache value is not necessarily the one
that the caller expects. As long as the cache key fully identifies all
the inputs to the Function, the output should be correct. And since the
caller used the snapshot/view to calculate that cache key, it should
always be safe to pass in that snapshot/view. If it's not, then we
already had a bug.

The Arg type in memoize is clumsy, but I thought it would be nice to
have at least a little bit of type safety. I'm open to suggestions.

Change-Id: I23f546638b0c66a4698620a986949087211f4762
Reviewed-on: https://go-review.googlesource.com/c/tools/+/244019
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2020-07-28 17:34:46 +00:00
Pontus Leitzler 55644ead90 internal/lsp: allow narrower scope for convenience CodeActions
Code actions that apply convenience fixes were filtered by the start
line so it wasn't possible to narrow the scope to a specific range.

This change allows clients to send a specific range (or cursor position)
to filter all fixes where the range doesn't intersect with the provided
range. It also widens the diagnostic returned by fillstruct analysis.

The idea is to provide a way to narrow the scope without breaking
clients that do want to ask for code actions using the entire line.

Updates golang/go#40438

Change-Id: Ifd984a092a4a3bf0b3a2a5426d3e65023ba4eebc
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2020-07-27 23:36:28 +00:00
Rebecca Stambler 9267083701 internal/lsp: support refactor.extract through commands
The logic for extracting a function is quite signficant, and the code
is expensive enough that we should only call it when requested by the
user. This means that we should support extracting through a command
rather than text edits in the code action.

To that end, we create a new struct for commands. Features like extract
variable and extract function can supply functions to determine if they
are relevant to the given range, and if so, to generate their text
edits. source.Analyzers now point to Commands, rather than
SuggestedFixFuncs. The "canExtractVariable" and "canExtractFunction"
functions still need improvements, but I think that can be done in a
follow-up.

Change-Id: I9ec894c5abdbb28505a0f84ad7c76aa50977827a
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2020-07-27 19:25:51 +00:00
Rebecca Stambler 37a045f3b9 internal/lsp: move undeclaredname suggested fix out of analysis
This CL is a follow-up from CL 241983. I didn't realize that the
undeclaredname analysis was also using the go/printer.Fprint trick,
which we decided was both incorrect and inefficient. This CL does
approximately the same things as CL 241983, with a few changes to make
the approach more general.

source.Analyzer now has a field to indicate if its suggested fix needs
to be computed separately, and that is used to determine which
code actions get commands. We also make helper functions to map
analyses to their commands.

I figured out a neater way to test suggested fixes in this CL, so I
reversed the move to source_test back to lsp_test (which was the right
place all along).

Change-Id: I505bf4790481d887edda8b82897e541ec73fb427
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2020-07-23 23:54:27 +00:00
Rebecca Stambler 6123e77877 internal/lsp: support `go mod tidy` on save without diagnostics
This change adds support for `go mod tidy` on save when users opt into
import organization on save. Previously, we supported this with the
go mod tidy command, but there's no need to do this when we already
have a ModTidyHandle available.

Change-Id: Ibb47b6a7611fd823dac2a3b4f3a43b9fbb3289b6
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2020-07-21 22:32:18 +00:00
Rebecca Stambler 5ea363182e internal/lsp: change the way that we pass arguments to command
Our approach to commands and their arguments has been ad-hoc until this
point. This CL creates a standard way of defining and passing the
arguments to different commands. The arguments to a command are now
json.RawMessages, so that we don't have to double encode. This also
allows us to check the expected number of arguments without defining
a struct for every command.

Change-Id: Ic765c9b059e8ec3e1985046d13bf321be21f16ab
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2020-07-21 16:30:27 +00:00
Pontus Leitzler b8e13e1a4d internal/lsp: return the actual range from convenience code actions
Convenience code actions operates at line-by-line, but a line can
contain more than one fix.

To be able to tell them apart each response now return the actual
range as reported by the analyzer.

Fixes golang/go#40328

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2020-07-21 15:44:06 +00:00
Rebecca Stambler 4025ed8474 internal/lsp: move fillstruct suggested fixes out of analysis
This change moves the suggested fixes logic for fillstruct out of the
analysis and into internal/lsp/source. This logic is then used as part
of a new fillstruct command. This command is returned along with the
code action results, to be executed only when the user accepts the code
action.

This led to a number of changes to testing. The suggested fix tests in
internal/lsp doesn't support executing commands, so we skip them. The
suggested fix tests in internal/lsp/source are changed to call
fillstruct directly. A new regtest is added to check the command
execution, which led to a few regtest changes.

Also, remove the `go mod tidy` code action, as it's made redundant by
the existence of the suggested fixes coming from internal/lsp/mod.

Change-Id: I35ca0aff1ace8f0097fe7cb57232997facb516a4
Reviewed-on: https://go-review.googlesource.com/c/tools/+/241983
Reviewed-by: Heschi Kreinick <heschi@google.com>
2020-07-20 20:42:44 +00:00
Josh Baum 6d307edf52 internal/lsp: support extract function
Extract function is a code action, similar to extract variable. After
highlighting a selection, if valid, the lightbulb appears to trigger
extraction. The current implementation does not allow users to
extract selections with a return statement.

Updates golang/go#37170

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2020-07-20 18:55:41 +00:00