blob: e9483b6df1be8f98c895aa0aa8619d9939072ffe [file] [log] [blame]
// Copyright 2020 The Go Authors. All rights reserved.
// Use of this source code is governed by a BSD-style
// license that can be found in the LICENSE file.
package lsp
import (
"bytes"
"context"
"encoding/json"
"errors"
"fmt"
"io"
"io/ioutil"
"os"
"os/exec"
"path/filepath"
"sort"
"strings"
"golang.org/x/mod/modfile"
"golang.org/x/tools/go/ast/astutil"
"golang.org/x/tools/gopls/internal/lsp/command"
"golang.org/x/tools/gopls/internal/lsp/debug"
"golang.org/x/tools/gopls/internal/lsp/progress"
"golang.org/x/tools/gopls/internal/lsp/protocol"
"golang.org/x/tools/gopls/internal/lsp/source"
"golang.org/x/tools/gopls/internal/vulncheck"
"golang.org/x/tools/internal/event"
"golang.org/x/tools/internal/gocommand"
"golang.org/x/tools/internal/span"
"golang.org/x/tools/internal/xcontext"
)
func (s *Server) executeCommand(ctx context.Context, params *protocol.ExecuteCommandParams) (interface{}, error) {
var found bool
for _, name := range s.session.Options().SupportedCommands {
if name == params.Command {
found = true
break
}
}
if !found {
return nil, fmt.Errorf("%s is not a supported command", params.Command)
}
handler := &commandHandler{
s: s,
params: params,
}
return command.Dispatch(ctx, params, handler)
}
type commandHandler struct {
s *Server
params *protocol.ExecuteCommandParams
}
// commandConfig configures common command set-up and execution.
type commandConfig struct {
async bool // whether to run the command asynchronously. Async commands can only return errors.
requireSave bool // whether all files must be saved for the command to work
progress string // title to use for progress reporting. If empty, no progress will be reported.
forURI protocol.DocumentURI // URI to resolve to a snapshot. If unset, snapshot will be nil.
}
// commandDeps is evaluated from a commandConfig. Note that not all fields may
// be populated, depending on which configuration is set. See comments in-line
// for details.
type commandDeps struct {
snapshot source.Snapshot // present if cfg.forURI was set
fh source.VersionedFileHandle // present if cfg.forURI was set
work *progress.WorkDone // present cfg.progress was set
}
type commandFunc func(context.Context, commandDeps) error
func (c *commandHandler) run(ctx context.Context, cfg commandConfig, run commandFunc) (err error) {
if cfg.requireSave {
var unsaved []string
for _, overlay := range c.s.session.Overlays() {
if !overlay.Saved() {
unsaved = append(unsaved, overlay.URI().Filename())
}
}
if len(unsaved) > 0 {
return fmt.Errorf("All files must be saved first (unsaved: %v).", unsaved)
}
}
var deps commandDeps
if cfg.forURI != "" {
var ok bool
var release func()
deps.snapshot, deps.fh, ok, release, err = c.s.beginFileRequest(ctx, cfg.forURI, source.UnknownKind)
defer release()
if !ok {
if err != nil {
return err
}
return fmt.Errorf("invalid file URL: %v", cfg.forURI)
}
}
ctx, cancel := context.WithCancel(xcontext.Detach(ctx))
if cfg.progress != "" {
deps.work = c.s.progress.Start(ctx, cfg.progress, "Running...", c.params.WorkDoneToken, cancel)
}
runcmd := func() error {
defer cancel()
err := run(ctx, deps)
if deps.work != nil {
switch {
case errors.Is(err, context.Canceled):
deps.work.End(ctx, "canceled")
case err != nil:
event.Error(ctx, "command error", err)
deps.work.End(ctx, "failed")
default:
deps.work.End(ctx, "completed")
}
}
return err
}
if cfg.async {
go func() {
if err := runcmd(); err != nil {
if showMessageErr := c.s.client.ShowMessage(ctx, &protocol.ShowMessageParams{
Type: protocol.Error,
Message: err.Error(),
}); showMessageErr != nil {
event.Error(ctx, fmt.Sprintf("failed to show message: %q", err.Error()), showMessageErr)
}
}
}()
return nil
}
return runcmd()
}
func (c *commandHandler) ApplyFix(ctx context.Context, args command.ApplyFixArgs) error {
return c.run(ctx, commandConfig{
// Note: no progress here. Applying fixes should be quick.
forURI: args.URI,
}, func(ctx context.Context, deps commandDeps) error {
edits, err := source.ApplyFix(ctx, args.Fix, deps.snapshot, deps.fh, args.Range)
if err != nil {
return err
}
var changes []protocol.DocumentChanges
for _, edit := range edits {
changes = append(changes, protocol.DocumentChanges{
TextDocumentEdit: &edit,
})
}
r, err := c.s.client.ApplyEdit(ctx, &protocol.ApplyWorkspaceEditParams{
Edit: protocol.WorkspaceEdit{
DocumentChanges: changes,
},
})
if err != nil {
return err
}
if !r.Applied {
return errors.New(r.FailureReason)
}
return nil
})
}
func (c *commandHandler) RegenerateCgo(ctx context.Context, args command.URIArg) error {
return c.run(ctx, commandConfig{
progress: "Regenerating Cgo",
}, func(ctx context.Context, deps commandDeps) error {
mod := source.FileModification{
URI: args.URI.SpanURI(),
Action: source.InvalidateMetadata,
}
return c.s.didModifyFiles(ctx, []source.FileModification{mod}, FromRegenerateCgo)
})
}
func (c *commandHandler) CheckUpgrades(ctx context.Context, args command.CheckUpgradesArgs) error {
return c.run(ctx, commandConfig{
forURI: args.URI,
progress: "Checking for upgrades",
}, func(ctx context.Context, deps commandDeps) error {
upgrades, err := c.s.getUpgrades(ctx, deps.snapshot, args.URI.SpanURI(), args.Modules)
if err != nil {
return err
}
deps.snapshot.View().RegisterModuleUpgrades(args.URI.SpanURI(), upgrades)
// Re-diagnose the snapshot to publish the new module diagnostics.
c.s.diagnoseSnapshot(deps.snapshot, nil, false)
return nil
})
}
func (c *commandHandler) AddDependency(ctx context.Context, args command.DependencyArgs) error {
return c.GoGetModule(ctx, args)
}
func (c *commandHandler) UpgradeDependency(ctx context.Context, args command.DependencyArgs) error {
return c.GoGetModule(ctx, args)
}
func (c *commandHandler) ResetGoModDiagnostics(ctx context.Context, uri command.URIArg) error {
return c.run(ctx, commandConfig{
forURI: uri.URI,
}, func(ctx context.Context, deps commandDeps) error {
deps.snapshot.View().ClearModuleUpgrades(uri.URI.SpanURI())
deps.snapshot.View().SetVulnerabilities(uri.URI.SpanURI(), nil)
// Clear all diagnostics coming from the upgrade check source and vulncheck.
// This will clear the diagnostics in all go.mod files, but they
// will be re-calculated when the snapshot is diagnosed again.
c.s.clearDiagnosticSource(modCheckUpgradesSource)
c.s.clearDiagnosticSource(modVulncheckSource)
// Re-diagnose the snapshot to remove the diagnostics.
c.s.diagnoseSnapshot(deps.snapshot, nil, false)
return nil
})
}
func (c *commandHandler) GoGetModule(ctx context.Context, args command.DependencyArgs) error {
return c.run(ctx, commandConfig{
progress: "Running go get",
forURI: args.URI,
}, func(ctx context.Context, deps commandDeps) error {
return c.s.runGoModUpdateCommands(ctx, deps.snapshot, args.URI.SpanURI(), func(invoke func(...string) (*bytes.Buffer, error)) error {
return runGoGetModule(invoke, args.AddRequire, args.GoCmdArgs)
})
})
}
// TODO(rFindley): UpdateGoSum, Tidy, and Vendor could probably all be one command.
func (c *commandHandler) UpdateGoSum(ctx context.Context, args command.URIArgs) error {
return c.run(ctx, commandConfig{
progress: "Updating go.sum",
}, func(ctx context.Context, deps commandDeps) error {
for _, uri := range args.URIs {
snapshot, fh, ok, release, err := c.s.beginFileRequest(ctx, uri, source.UnknownKind)
defer release()
if !ok {
return err
}
if err := c.s.runGoModUpdateCommands(ctx, snapshot, fh.URI(), func(invoke func(...string) (*bytes.Buffer, error)) error {
_, err := invoke("list", "all")
return err
}); err != nil {
return err
}
}
return nil
})
}
func (c *commandHandler) Tidy(ctx context.Context, args command.URIArgs) error {
return c.run(ctx, commandConfig{
requireSave: true,
progress: "Running go mod tidy",
}, func(ctx context.Context, deps commandDeps) error {
for _, uri := range args.URIs {
snapshot, fh, ok, release, err := c.s.beginFileRequest(ctx, uri, source.UnknownKind)
defer release()
if !ok {
return err
}
if err := c.s.runGoModUpdateCommands(ctx, snapshot, fh.URI(), func(invoke func(...string) (*bytes.Buffer, error)) error {
_, err := invoke("mod", "tidy")
return err
}); err != nil {
return err
}
}
return nil
})
}
func (c *commandHandler) Vendor(ctx context.Context, args command.URIArg) error {
return c.run(ctx, commandConfig{
requireSave: true,
progress: "Running go mod vendor",
forURI: args.URI,
}, func(ctx context.Context, deps commandDeps) error {
// Use RunGoCommandPiped here so that we don't compete with any other go
// command invocations. go mod vendor deletes modules.txt before recreating
// it, and therefore can run into file locking issues on Windows if that
// file is in use by another process, such as go list.
//
// If golang/go#44119 is resolved, go mod vendor will instead modify
// modules.txt in-place. In that case we could theoretically allow this
// command to run concurrently.
err := deps.snapshot.RunGoCommandPiped(ctx, source.Normal|source.AllowNetwork, &gocommand.Invocation{
Verb: "mod",
Args: []string{"vendor"},
WorkingDir: filepath.Dir(args.URI.SpanURI().Filename()),
}, &bytes.Buffer{}, &bytes.Buffer{})
return err
})
}
func (c *commandHandler) EditGoDirective(ctx context.Context, args command.EditGoDirectiveArgs) error {
return c.run(ctx, commandConfig{
requireSave: true, // if go.mod isn't saved it could cause a problem
forURI: args.URI,
}, func(ctx context.Context, deps commandDeps) error {
snapshot, fh, ok, release, err := c.s.beginFileRequest(ctx, args.URI, source.UnknownKind)
defer release()
if !ok {
return err
}
if err := c.s.runGoModUpdateCommands(ctx, snapshot, fh.URI(), func(invoke func(...string) (*bytes.Buffer, error)) error {
_, err := invoke("mod", "edit", "-go", args.Version)
return err
}); err != nil {
return err
}
return nil
})
}
func (c *commandHandler) RemoveDependency(ctx context.Context, args command.RemoveDependencyArgs) error {
return c.run(ctx, commandConfig{
progress: "Removing dependency",
forURI: args.URI,
}, func(ctx context.Context, deps commandDeps) error {
// If the module is tidied apart from the one unused diagnostic, we can
// run `go get module@none`, and then run `go mod tidy`. Otherwise, we
// must make textual edits.
// TODO(rstambler): In Go 1.17+, we will be able to use the go command
// without checking if the module is tidy.
if args.OnlyDiagnostic {
return c.s.runGoModUpdateCommands(ctx, deps.snapshot, args.URI.SpanURI(), func(invoke func(...string) (*bytes.Buffer, error)) error {
if err := runGoGetModule(invoke, false, []string{args.ModulePath + "@none"}); err != nil {
return err
}
_, err := invoke("mod", "tidy")
return err
})
}
pm, err := deps.snapshot.ParseMod(ctx, deps.fh)
if err != nil {
return err
}
edits, err := dropDependency(deps.snapshot, pm, args.ModulePath)
if err != nil {
return err
}
response, err := c.s.client.ApplyEdit(ctx, &protocol.ApplyWorkspaceEditParams{
Edit: protocol.WorkspaceEdit{
DocumentChanges: []protocol.DocumentChanges{
{
TextDocumentEdit: &protocol.TextDocumentEdit{
TextDocument: protocol.OptionalVersionedTextDocumentIdentifier{
Version: deps.fh.Version(),
TextDocumentIdentifier: protocol.TextDocumentIdentifier{
URI: protocol.URIFromSpanURI(deps.fh.URI()),
},
},
Edits: edits,
},
},
},
},
})
if err != nil {
return err
}
if !response.Applied {
return fmt.Errorf("edits not applied because of %s", response.FailureReason)
}
return nil
})
}
// dropDependency returns the edits to remove the given require from the go.mod
// file.
func dropDependency(snapshot source.Snapshot, pm *source.ParsedModule, modulePath string) ([]protocol.TextEdit, error) {
// We need a private copy of the parsed go.mod file, since we're going to
// modify it.
copied, err := modfile.Parse("", pm.Mapper.Content, nil)
if err != nil {
return nil, err
}
if err := copied.DropRequire(modulePath); err != nil {
return nil, err
}
copied.Cleanup()
newContent, err := copied.Format()
if err != nil {
return nil, err
}
// Calculate the edits to be made due to the change.
diff := snapshot.View().Options().ComputeEdits(pm.URI, string(pm.Mapper.Content), string(newContent))
return source.ToProtocolEdits(pm.Mapper, diff)
}
func (c *commandHandler) Test(ctx context.Context, uri protocol.DocumentURI, tests, benchmarks []string) error {
return c.RunTests(ctx, command.RunTestsArgs{
URI: uri,
Tests: tests,
Benchmarks: benchmarks,
})
}
func (c *commandHandler) RunTests(ctx context.Context, args command.RunTestsArgs) error {
return c.run(ctx, commandConfig{
async: true,
progress: "Running go test",
requireSave: true,
forURI: args.URI,
}, func(ctx context.Context, deps commandDeps) error {
if err := c.runTests(ctx, deps.snapshot, deps.work, args.URI, args.Tests, args.Benchmarks); err != nil {
return fmt.Errorf("running tests failed: %w", err)
}
return nil
})
}
func (c *commandHandler) runTests(ctx context.Context, snapshot source.Snapshot, work *progress.WorkDone, uri protocol.DocumentURI, tests, benchmarks []string) error {
// TODO: fix the error reporting when this runs async.
pkgs, err := snapshot.PackagesForFile(ctx, uri.SpanURI(), source.TypecheckWorkspace, false)
if err != nil {
return err
}
if len(pkgs) == 0 {
return fmt.Errorf("package could not be found for file: %s", uri.SpanURI().Filename())
}
pkgPath := pkgs[0].ForTest()
// create output
buf := &bytes.Buffer{}
ew := progress.NewEventWriter(ctx, "test")
out := io.MultiWriter(ew, progress.NewWorkDoneWriter(ctx, work), buf)
// Run `go test -run Func` on each test.
var failedTests int
for _, funcName := range tests {
inv := &gocommand.Invocation{
Verb: "test",
Args: []string{pkgPath, "-v", "-count=1", "-run", fmt.Sprintf("^%s$", funcName)},
WorkingDir: filepath.Dir(uri.SpanURI().Filename()),
}
if err := snapshot.RunGoCommandPiped(ctx, source.Normal, inv, out, out); err != nil {
if errors.Is(err, context.Canceled) {
return err
}
failedTests++
}
}
// Run `go test -run=^$ -bench Func` on each test.
var failedBenchmarks int
for _, funcName := range benchmarks {
inv := &gocommand.Invocation{
Verb: "test",
Args: []string{pkgPath, "-v", "-run=^$", "-bench", fmt.Sprintf("^%s$", funcName)},
WorkingDir: filepath.Dir(uri.SpanURI().Filename()),
}
if err := snapshot.RunGoCommandPiped(ctx, source.Normal, inv, out, out); err != nil {
if errors.Is(err, context.Canceled) {
return err
}
failedBenchmarks++
}
}
var title string
if len(tests) > 0 && len(benchmarks) > 0 {
title = "tests and benchmarks"
} else if len(tests) > 0 {
title = "tests"
} else if len(benchmarks) > 0 {
title = "benchmarks"
} else {
return errors.New("No functions were provided")
}
message := fmt.Sprintf("all %s passed", title)
if failedTests > 0 && failedBenchmarks > 0 {
message = fmt.Sprintf("%d / %d tests failed and %d / %d benchmarks failed", failedTests, len(tests), failedBenchmarks, len(benchmarks))
} else if failedTests > 0 {
message = fmt.Sprintf("%d / %d tests failed", failedTests, len(tests))
} else if failedBenchmarks > 0 {
message = fmt.Sprintf("%d / %d benchmarks failed", failedBenchmarks, len(benchmarks))
}
if failedTests > 0 || failedBenchmarks > 0 {
message += "\n" + buf.String()
}
return c.s.client.ShowMessage(ctx, &protocol.ShowMessageParams{
Type: protocol.Info,
Message: message,
})
}
func (c *commandHandler) Generate(ctx context.Context, args command.GenerateArgs) error {
title := "Running go generate ."
if args.Recursive {
title = "Running go generate ./..."
}
return c.run(ctx, commandConfig{
requireSave: true,
progress: title,
forURI: args.Dir,
}, func(ctx context.Context, deps commandDeps) error {
er := progress.NewEventWriter(ctx, "generate")
pattern := "."
if args.Recursive {
pattern = "./..."
}
inv := &gocommand.Invocation{
Verb: "generate",
Args: []string{"-x", pattern},
WorkingDir: args.Dir.SpanURI().Filename(),
}
stderr := io.MultiWriter(er, progress.NewWorkDoneWriter(ctx, deps.work))
if err := deps.snapshot.RunGoCommandPiped(ctx, source.Normal, inv, er, stderr); err != nil {
return err
}
return nil
})
}
func (c *commandHandler) GoGetPackage(ctx context.Context, args command.GoGetPackageArgs) error {
return c.run(ctx, commandConfig{
forURI: args.URI,
progress: "Running go get",
}, func(ctx context.Context, deps commandDeps) error {
// Run on a throwaway go.mod, otherwise it'll write to the real one.
stdout, err := deps.snapshot.RunGoCommandDirect(ctx, source.WriteTemporaryModFile|source.AllowNetwork, &gocommand.Invocation{
Verb: "list",
Args: []string{"-f", "{{.Module.Path}}@{{.Module.Version}}", args.Pkg},
WorkingDir: filepath.Dir(args.URI.SpanURI().Filename()),
})
if err != nil {
return err
}
ver := strings.TrimSpace(stdout.String())
return c.s.runGoModUpdateCommands(ctx, deps.snapshot, args.URI.SpanURI(), func(invoke func(...string) (*bytes.Buffer, error)) error {
if args.AddRequire {
if err := addModuleRequire(invoke, []string{ver}); err != nil {
return err
}
}
_, err := invoke(append([]string{"get", "-d"}, args.Pkg)...)
return err
})
})
}
func (s *Server) runGoModUpdateCommands(ctx context.Context, snapshot source.Snapshot, uri span.URI, run func(invoke func(...string) (*bytes.Buffer, error)) error) error {
tmpModfile, newModBytes, newSumBytes, err := snapshot.RunGoCommands(ctx, true, filepath.Dir(uri.Filename()), run)
if err != nil {
return err
}
if !tmpModfile {
return nil
}
modURI := snapshot.GoModForFile(uri)
sumURI := span.URIFromPath(strings.TrimSuffix(modURI.Filename(), ".mod") + ".sum")
modEdits, err := applyFileEdits(ctx, snapshot, modURI, newModBytes)
if err != nil {
return err
}
sumEdits, err := applyFileEdits(ctx, snapshot, sumURI, newSumBytes)
if err != nil {
return err
}
changes := append(sumEdits, modEdits...)
if len(changes) == 0 {
return nil
}
var documentChanges []protocol.DocumentChanges
for _, change := range changes {
documentChanges = append(documentChanges, protocol.DocumentChanges{
TextDocumentEdit: &change,
})
}
response, err := s.client.ApplyEdit(ctx, &protocol.ApplyWorkspaceEditParams{
Edit: protocol.WorkspaceEdit{
DocumentChanges: documentChanges,
},
})
if err != nil {
return err
}
if !response.Applied {
return fmt.Errorf("edits not applied because of %s", response.FailureReason)
}
return nil
}
func applyFileEdits(ctx context.Context, snapshot source.Snapshot, uri span.URI, newContent []byte) ([]protocol.TextDocumentEdit, error) {
fh, err := snapshot.GetVersionedFile(ctx, uri)
if err != nil {
return nil, err
}
oldContent, err := fh.Read()
if err != nil && !os.IsNotExist(err) {
return nil, err
}
if bytes.Equal(oldContent, newContent) {
return nil, nil
}
// Sending a workspace edit to a closed file causes VS Code to open the
// file and leave it unsaved. We would rather apply the changes directly,
// especially to go.sum, which should be mostly invisible to the user.
if !snapshot.IsOpen(uri) {
err := ioutil.WriteFile(uri.Filename(), newContent, 0666)
return nil, err
}
m := protocol.NewColumnMapper(fh.URI(), oldContent)
diff := snapshot.View().Options().ComputeEdits(uri, string(oldContent), string(newContent))
edits, err := source.ToProtocolEdits(m, diff)
if err != nil {
return nil, err
}
return []protocol.TextDocumentEdit{{
TextDocument: protocol.OptionalVersionedTextDocumentIdentifier{
Version: fh.Version(),
TextDocumentIdentifier: protocol.TextDocumentIdentifier{
URI: protocol.URIFromSpanURI(uri),
},
},
Edits: edits,
}}, nil
}
func runGoGetModule(invoke func(...string) (*bytes.Buffer, error), addRequire bool, args []string) error {
if addRequire {
if err := addModuleRequire(invoke, args); err != nil {
return err
}
}
_, err := invoke(append([]string{"get", "-d"}, args...)...)
return err
}
func addModuleRequire(invoke func(...string) (*bytes.Buffer, error), args []string) error {
// Using go get to create a new dependency results in an
// `// indirect` comment we may not want. The only way to avoid it
// is to add the require as direct first. Then we can use go get to
// update go.sum and tidy up.
_, err := invoke(append([]string{"mod", "edit", "-require"}, args...)...)
return err
}
func (s *Server) getUpgrades(ctx context.Context, snapshot source.Snapshot, uri span.URI, modules []string) (map[string]string, error) {
stdout, err := snapshot.RunGoCommandDirect(ctx, source.Normal|source.AllowNetwork, &gocommand.Invocation{
Verb: "list",
Args: append([]string{"-m", "-u", "-json"}, modules...),
WorkingDir: filepath.Dir(uri.Filename()),
ModFlag: "readonly",
})
if err != nil {
return nil, err
}
upgrades := map[string]string{}
for dec := json.NewDecoder(stdout); dec.More(); {
mod := &gocommand.ModuleJSON{}
if err := dec.Decode(mod); err != nil {
return nil, err
}
if mod.Update == nil {
continue
}
upgrades[mod.Path] = mod.Update.Version
}
return upgrades, nil
}
func (c *commandHandler) GCDetails(ctx context.Context, uri protocol.DocumentURI) error {
return c.ToggleGCDetails(ctx, command.URIArg{URI: uri})
}
func (c *commandHandler) ToggleGCDetails(ctx context.Context, args command.URIArg) error {
return c.run(ctx, commandConfig{
requireSave: true,
progress: "Toggling GC Details",
forURI: args.URI,
}, func(ctx context.Context, deps commandDeps) error {
pkg, err := deps.snapshot.PackageForFile(ctx, deps.fh.URI(), source.TypecheckWorkspace, source.NarrowestPackage)
if err != nil {
return err
}
c.s.gcOptimizationDetailsMu.Lock()
if _, ok := c.s.gcOptimizationDetails[pkg.ID()]; ok {
delete(c.s.gcOptimizationDetails, pkg.ID())
c.s.clearDiagnosticSource(gcDetailsSource)
} else {
c.s.gcOptimizationDetails[pkg.ID()] = struct{}{}
}
c.s.gcOptimizationDetailsMu.Unlock()
c.s.diagnoseSnapshot(deps.snapshot, nil, false)
return nil
})
}
func (c *commandHandler) GenerateGoplsMod(ctx context.Context, args command.URIArg) error {
// TODO: go back to using URI
return c.run(ctx, commandConfig{
requireSave: true,
progress: "Generating gopls.mod",
}, func(ctx context.Context, deps commandDeps) error {
views := c.s.session.Views()
if len(views) != 1 {
return fmt.Errorf("cannot resolve view: have %d views", len(views))
}
v := views[0]
snapshot, release := v.Snapshot(ctx)
defer release()
modFile, err := snapshot.BuildGoplsMod(ctx)
if err != nil {
return fmt.Errorf("getting workspace mod file: %w", err)
}
content, err := modFile.Format()
if err != nil {
return fmt.Errorf("formatting mod file: %w", err)
}
filename := filepath.Join(v.Folder().Filename(), "gopls.mod")
if err := ioutil.WriteFile(filename, content, 0644); err != nil {
return fmt.Errorf("writing mod file: %w", err)
}
return nil
})
}
func (c *commandHandler) ListKnownPackages(ctx context.Context, args command.URIArg) (command.ListKnownPackagesResult, error) {
var result command.ListKnownPackagesResult
err := c.run(ctx, commandConfig{
progress: "Listing packages",
forURI: args.URI,
}, func(ctx context.Context, deps commandDeps) error {
var err error
result.Packages, err = source.KnownPackages(ctx, deps.snapshot, deps.fh)
return err
})
return result, err
}
func (c *commandHandler) ListImports(ctx context.Context, args command.URIArg) (command.ListImportsResult, error) {
var result command.ListImportsResult
err := c.run(ctx, commandConfig{
forURI: args.URI,
}, func(ctx context.Context, deps commandDeps) error {
pkg, err := deps.snapshot.PackageForFile(ctx, args.URI.SpanURI(), source.TypecheckWorkspace, source.NarrowestPackage)
if err != nil {
return err
}
pgf, err := pkg.File(args.URI.SpanURI())
if err != nil {
return err
}
for _, group := range astutil.Imports(deps.snapshot.FileSet(), pgf.File) {
for _, imp := range group {
if imp.Path == nil {
continue
}
var name string
if imp.Name != nil {
name = imp.Name.Name
}
result.Imports = append(result.Imports, command.FileImport{
Path: source.ImportPath(imp),
Name: name,
})
}
}
for _, imp := range pkg.Imports() {
result.PackageImports = append(result.PackageImports, command.PackageImport{
Path: imp.PkgPath(), // This might be the vendored path under GOPATH vendoring, in which case it's a bug.
})
}
sort.Slice(result.PackageImports, func(i, j int) bool {
return result.PackageImports[i].Path < result.PackageImports[j].Path
})
return nil
})
return result, err
}
func (c *commandHandler) AddImport(ctx context.Context, args command.AddImportArgs) error {
return c.run(ctx, commandConfig{
progress: "Adding import",
forURI: args.URI,
}, func(ctx context.Context, deps commandDeps) error {
edits, err := source.AddImport(ctx, deps.snapshot, deps.fh, args.ImportPath)
if err != nil {
return fmt.Errorf("could not add import: %v", err)
}
if _, err := c.s.client.ApplyEdit(ctx, &protocol.ApplyWorkspaceEditParams{
Edit: protocol.WorkspaceEdit{
DocumentChanges: documentChanges(deps.fh, edits),
},
}); err != nil {
return fmt.Errorf("could not apply import edits: %v", err)
}
return nil
})
}
func (c *commandHandler) StartDebugging(ctx context.Context, args command.DebuggingArgs) (result command.DebuggingResult, _ error) {
addr := args.Addr
if addr == "" {
addr = "localhost:0"
}
di := debug.GetInstance(ctx)
if di == nil {
return result, errors.New("internal error: server has no debugging instance")
}
listenedAddr, err := di.Serve(ctx, addr)
if err != nil {
return result, fmt.Errorf("starting debug server: %w", err)
}
result.URLs = []string{"http://" + listenedAddr}
return result, nil
}
// Copy of pkgLoadConfig defined in internal/lsp/cmd/vulncheck.go
// TODO(hyangah): decide where to define this.
type pkgLoadConfig struct {
// BuildFlags is a list of command-line flags to be passed through to
// the build system's query tool.
BuildFlags []string
// If Tests is set, the loader includes related test packages.
Tests bool
}
func (c *commandHandler) RunVulncheckExp(ctx context.Context, args command.VulncheckArgs) error {
if args.URI == "" {
return errors.New("VulncheckArgs is missing URI field")
}
err := c.run(ctx, commandConfig{
async: true, // need to be async to be cancellable
progress: "govulncheck",
requireSave: true,
forURI: args.URI,
}, func(ctx context.Context, deps commandDeps) error {
view := deps.snapshot.View()
opts := view.Options()
// quickly test if gopls is compiled to support govulncheck
// by checking vulncheck.Govulncheck. Alternatively, we can continue and
// let the `gopls vulncheck` command fail. This is lighter-weight.
if vulncheck.Govulncheck == nil {
return errors.New("vulncheck feature is not available")
}
cmd := exec.CommandContext(ctx, os.Args[0], "vulncheck", "-config", args.Pattern)
cmd.Dir = filepath.Dir(args.URI.SpanURI().Filename())
var viewEnv []string
if e := opts.EnvSlice(); e != nil {
viewEnv = append(os.Environ(), e...)
}
cmd.Env = viewEnv
// stdin: gopls vulncheck expects JSON-encoded configuration from STDIN when -config flag is set.
var stdin bytes.Buffer
cmd.Stdin = &stdin
if err := json.NewEncoder(&stdin).Encode(pkgLoadConfig{
BuildFlags: opts.BuildFlags,
// TODO(hyangah): add `tests` flag in command.VulncheckArgs
}); err != nil {
return fmt.Errorf("failed to pass package load config: %v", err)
}
// stderr: stream gopls vulncheck's STDERR as progress reports
er := progress.NewEventWriter(ctx, "vulncheck")
stderr := io.MultiWriter(er, progress.NewWorkDoneWriter(ctx, deps.work))
cmd.Stderr = stderr
// TODO: can we stream stdout?
stdout, err := cmd.Output()
if err != nil {
return fmt.Errorf("failed to run govulncheck: %v", err)
}
var vulns command.VulncheckResult
if err := json.Unmarshal(stdout, &vulns); err != nil {
// TODO: for easy debugging, log the failed stdout somewhere?
return fmt.Errorf("failed to parse govulncheck output: %v", err)
}
deps.snapshot.View().SetVulnerabilities(args.URI.SpanURI(), vulns.Vuln)
c.s.diagnoseSnapshot(deps.snapshot, nil, false)
set := make(map[string]bool)
for _, v := range vulns.Vuln {
if len(v.CallStackSummaries) > 0 {
set[v.ID] = true
}
}
if len(set) == 0 {
return c.s.client.ShowMessage(ctx, &protocol.ShowMessageParams{
Type: protocol.Info,
Message: "No vulnerabilities found",
})
}
list := make([]string, 0, len(set))
for k := range set {
list = append(list, k)
}
sort.Strings(list)
return c.s.client.ShowMessage(ctx, &protocol.ShowMessageParams{
Type: protocol.Warning,
Message: fmt.Sprintf("Found %v", strings.Join(list, ", ")),
})
})
return err
}