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// 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 cmd
import (
"context"
"flag"
"fmt"
"golang.org/x/tools/internal/lsp/protocol"
"golang.org/x/tools/internal/lsp/source"
"golang.org/x/tools/internal/tool"
)
// workspace is a top-level command for working with the gopls workspace. This
// is experimental and subject to change. The idea is that subcommands could be
// used for manipulating the workspace mod file, rather than editing it
// manually.
type workspace struct {
app *Application
}
func (w *workspace) subCommands() []tool.Application {
return []tool.Application{
&generateWorkspaceMod{app: w.app},
}
}
func (w *workspace) Name() string { return "workspace" }
func (w *workspace) Usage() string { return "<subcommand> [args...]" }
func (w *workspace) ShortHelp() string {
return "manage the gopls workspace (experimental: under development)"
}
func (w *workspace) DetailedHelp(f *flag.FlagSet) {
fmt.Fprint(f.Output(), "\nsubcommands:\n")
for _, c := range w.subCommands() {
fmt.Fprintf(f.Output(), " %s: %s\n", c.Name(), c.ShortHelp())
}
f.PrintDefaults()
}
func (w *workspace) Run(ctx context.Context, args ...string) error {
if len(args) == 0 {
return tool.CommandLineErrorf("must provide subcommand to %q", w.Name())
}
command, args := args[0], args[1:]
for _, c := range w.subCommands() {
if c.Name() == command {
return tool.Run(ctx, c, args)
}
}
return tool.CommandLineErrorf("unknown command %v", command)
}
// generateWorkspaceMod (re)generates the gopls.mod file for the current
// workspace.
type generateWorkspaceMod struct {
app *Application
}
func (c *generateWorkspaceMod) Name() string { return "generate" }
func (c *generateWorkspaceMod) Usage() string { return "" }
func (c *generateWorkspaceMod) ShortHelp() string {
return "generate a gopls.mod file for a workspace"
}
func (c *generateWorkspaceMod) DetailedHelp(f *flag.FlagSet) {
f.PrintDefaults()
}
func (c *generateWorkspaceMod) Run(ctx context.Context, args ...string) error {
origOptions := c.app.options
c.app.options = func(opts *source.Options) {
origOptions(opts)
opts.ExperimentalWorkspaceModule = true
}
conn, err := c.app.connect(ctx)
if err != nil {
return err
}
defer conn.terminate(ctx)
params := &protocol.ExecuteCommandParams{Command: source.CommandGenerateGoplsMod.ID()}
if _, err := conn.ExecuteCommand(ctx, params); err != nil {
return fmt.Errorf("executing server command: %v", err)
}
return nil
}
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