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// Copyright 2021 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 command defines the interface provided by gopls for the
// workspace/executeCommand LSP request.
// This interface is fully specified by the Interface type, provided it
// conforms to the restrictions outlined in its doc string.
// Bindings for server-side command dispatch and client-side serialization are
// also provided by this package, via code generation.
package command
//go:generate go run -tags=generate generate.go
import (
// Interface defines the interface gopls exposes for the
// workspace/executeCommand request.
// This interface is used to generate marshaling/unmarshaling code, dispatch,
// and documentation, and so has some additional restrictions:
// 1. All method arguments must be JSON serializable.
// 2. Methods must return either error or (T, error), where T is a
// JSON serializable type.
// 3. The first line of the doc string is special. Everything after the colon
// is considered the command 'Title'.
// TODO(rFindley): reconsider this -- Title may be unnecessary.
type Interface interface {
// ApplyFix: Apply a fix
// Applies a fix to a region of source code.
ApplyFix(context.Context, ApplyFixArgs) error
// Test: Run test(s) (legacy)
// Runs `go test` for a specific set of test or benchmark functions.
Test(context.Context, protocol.DocumentURI, []string, []string) error
// TODO: deprecate Test in favor of RunTests below.
// Test: Run test(s)
// Runs `go test` for a specific set of test or benchmark functions.
RunTests(context.Context, RunTestsArgs) error
// Generate: Run go generate
// Runs `go generate` for a given directory.
Generate(context.Context, GenerateArgs) error
// RegenerateCgo: Regenerate cgo
// Regenerates cgo definitions.
RegenerateCgo(context.Context, URIArg) error
// Tidy: Run go mod tidy
// Runs `go mod tidy` for a module.
Tidy(context.Context, URIArgs) error
// Vendor: Run go mod vendor
// Runs `go mod vendor` for a module.
Vendor(context.Context, URIArg) error
// UpdateGoSum: Update go.sum
// Updates the go.sum file for a module.
UpdateGoSum(context.Context, URIArgs) error
// CheckUpgrades: Check for upgrades
// Checks for module upgrades.
CheckUpgrades(context.Context, CheckUpgradesArgs) error
// AddDependency: Add a dependency
// Adds a dependency to the go.mod file for a module.
AddDependency(context.Context, DependencyArgs) error
// UpgradeDependency: Upgrade a dependency
// Upgrades a dependency in the go.mod file for a module.
UpgradeDependency(context.Context, DependencyArgs) error
// RemoveDependency: Remove a dependency
// Removes a dependency from the go.mod file of a module.
RemoveDependency(context.Context, RemoveDependencyArgs) error
// GoGetPackage: go get a package
// Runs `go get` to fetch a package.
GoGetPackage(context.Context, GoGetPackageArgs) error
// GCDetails: Toggle gc_details
// Toggle the calculation of gc annotations.
GCDetails(context.Context, protocol.DocumentURI) error
// TODO: deprecate GCDetails in favor of ToggleGCDetails below.
// ToggleGCDetails: Toggle gc_details
// Toggle the calculation of gc annotations.
ToggleGCDetails(context.Context, URIArg) error
// GenerateGoplsMod: Generate gopls.mod
// (Re)generate the gopls.mod file for a workspace.
GenerateGoplsMod(context.Context, URIArg) error
// ListKnownPackages: List known packages
// Retrieve a list of packages that are importable from the given URI.
ListKnownPackages(context.Context, URIArg) (ListKnownPackagesResult, error)
// AddImport: Add an import
// Ask the server to add an import path to a given Go file. The method will
// call applyEdit on the client so that clients don't have to apply the edit
// themselves.
AddImport(context.Context, AddImportArgs) error
// WorkspaceMetadata: Query workspace metadata
// Query the server for information about active workspaces.
WorkspaceMetadata(context.Context) (WorkspaceMetadataResult, error)
// StartDebugging: Start the gopls debug server
// Start the gopls debug server if it isn't running, and return the debug
// address.
StartDebugging(context.Context, DebuggingArgs) (DebuggingResult, error)
type RunTestsArgs struct {
// The test file containing the tests to run.
URI protocol.DocumentURI
// Specific test names to run, e.g. TestFoo.
Tests []string
// Specific benchmarks to run, e.g. BenchmarkFoo.
Benchmarks []string
type GenerateArgs struct {
// URI for the directory to generate.
Dir protocol.DocumentURI
// Whether to generate recursively (go generate ./...)
Recursive bool
// TODO(rFindley): document the rest of these once the docgen is fleshed out.
type ApplyFixArgs struct {
// The fix to apply.
Fix string
// The file URI for the document to fix.
URI protocol.DocumentURI
// The document range to scan for fixes.
Range protocol.Range
type URIArg struct {
// The file URI.
URI protocol.DocumentURI
type URIArgs struct {
// The file URIs.
URIs []protocol.DocumentURI
type CheckUpgradesArgs struct {
// The go.mod file URI.
URI protocol.DocumentURI
// The modules to check.
Modules []string
type DependencyArgs struct {
// The go.mod file URI.
URI protocol.DocumentURI
// Additional args to pass to the go command.
GoCmdArgs []string
// Whether to add a require directive.
AddRequire bool
type RemoveDependencyArgs struct {
// The go.mod file URI.
URI protocol.DocumentURI
// The module path to remove.
ModulePath string
OnlyDiagnostic bool
type GoGetPackageArgs struct {
// Any document URI within the relevant module.
URI protocol.DocumentURI
// The package to go get.
Pkg string
AddRequire bool
type AddImportArgs struct {
// ImportPath is the target import path that should
// be added to the URI file
ImportPath string
// URI is the file that the ImportPath should be
// added to
URI protocol.DocumentURI
type ListKnownPackagesResult struct {
// Packages is a list of packages relative
// to the URIArg passed by the command request.
// In other words, it omits paths that are already
// imported or cannot be imported due to compiler
// restrictions.
Packages []string
type WorkspaceMetadataArgs struct {
type WorkspaceMetadataResult struct {
// All workspaces for this session.
Workspaces []Workspace
type Workspace struct {
// The workspace name.
Name string
// The workspace module directory.
ModuleDir string
type DebuggingArgs struct {
// Optional: the address (including port) for the debug server to listen on.
// If not provided, the debug server will bind to "localhost:0", and the
// full debug URL will be contained in the result.
// If there is more than one gopls instance along the serving path (i.e. you
// are using a daemon), each gopls instance will attempt to start debugging.
// If Addr specifies a port, only the daemon will be able to bind to that
// port, and each intermediate gopls instance will fail to start debugging.
// For this reason it is recommended not to specify a port (or equivalently,
// to specify ":0").
// If the server was already debugging this field has no effect, and the
// result will contain the previously configured debug URL(s).
Addr string
type DebuggingResult struct {
// The URLs to use to access the debug servers, for all gopls instances in
// the serving path. For the common case of a single gopls instance (i.e. no
// daemon), this will be exactly one address.
// In the case of one or more gopls instances forwarding the LSP to a daemon,
// URLs will contain debug addresses for each server in the serving path, in
// serving order. The daemon debug address will be the last entry in the
// slice. If any intermediate gopls instance fails to start debugging, no
// error will be returned but the debug URL for that server in the URLs slice
// will be empty.
URLs []string