+++ /dev/null
-// Copyright 2019 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"
- "io/ioutil"
-
- "golang.org/x/tools/internal/lsp/diff"
- "golang.org/x/tools/internal/lsp/protocol"
- "golang.org/x/tools/internal/lsp/source"
- "golang.org/x/tools/internal/span"
- errors "golang.org/x/xerrors"
-)
-
-// format implements the format verb for gopls.
-type format struct {
- Diff bool `flag:"d" help:"display diffs instead of rewriting files"`
- Write bool `flag:"w" help:"write result to (source) file instead of stdout"`
- List bool `flag:"l" help:"list files whose formatting differs from gofmt's"`
-
- app *Application
-}
-
-func (c *format) Name() string { return "format" }
-func (c *format) Usage() string { return "<filerange>" }
-func (c *format) ShortHelp() string { return "format the code according to the go standard" }
-func (c *format) DetailedHelp(f *flag.FlagSet) {
- fmt.Fprint(f.Output(), `
-The arguments supplied may be simple file names, or ranges within files.
-
-Example: reformat this file:
-
- $ gopls format -w internal/lsp/cmd/check.go
-
- gopls format flags are:
-`)
- f.PrintDefaults()
-}
-
-// Run performs the check on the files specified by args and prints the
-// results to stdout.
-func (c *format) Run(ctx context.Context, args ...string) error {
- if len(args) == 0 {
- // no files, so no results
- return nil
- }
- // now we ready to kick things off
- conn, err := c.app.connect(ctx)
- if err != nil {
- return err
- }
- defer conn.terminate(ctx)
- for _, arg := range args {
- spn := span.Parse(arg)
- file := conn.AddFile(ctx, spn.URI())
- if file.err != nil {
- return file.err
- }
- filename := spn.URI().Filename()
- loc, err := file.mapper.Location(spn)
- if err != nil {
- return err
- }
- if loc.Range.Start != loc.Range.End {
- return errors.Errorf("only full file formatting supported")
- }
- p := protocol.DocumentFormattingParams{
- TextDocument: protocol.TextDocumentIdentifier{URI: loc.URI},
- }
- edits, err := conn.Formatting(ctx, &p)
- if err != nil {
- return errors.Errorf("%v: %v", spn, err)
- }
- sedits, err := source.FromProtocolEdits(file.mapper, edits)
- if err != nil {
- return errors.Errorf("%v: %v", spn, err)
- }
- formatted := diff.ApplyEdits(string(file.mapper.Content), sedits)
- printIt := true
- if c.List {
- printIt = false
- if len(edits) > 0 {
- fmt.Println(filename)
- }
- }
- if c.Write {
- printIt = false
- if len(edits) > 0 {
- ioutil.WriteFile(filename, []byte(formatted), 0644)
- }
- }
- if c.Diff {
- printIt = false
- u := diff.ToUnified(filename+".orig", filename, string(file.mapper.Content), sedits)
- fmt.Print(u)
- }
- if printIt {
- fmt.Print(formatted)
- }
- }
- return nil
-}