mirror of
https://github.com/golang/go
synced 2024-10-01 07:28:35 -06:00
e88138204b
We panic if the uri was not a valid file uri instead They always are a valid file URI, and we would fail miserably to cope if they were not anyway, and there are lots of places where we need to be able to get the filename and don't want to cope with an error that cannot occur. If we ever have not file uri's, you will have to check if it is a file before calling .Filename, which seems reasonable anyway. Change-Id: Ifb26a165bd43c2d310378314550b5749b09e2ebd Reviewed-on: https://go-review.googlesource.com/c/tools/+/181017 Run-TryBot: Ian Cottrell <iancottrell@google.com> TryBot-Result: Gobot Gobot <gobot@golang.org> Reviewed-by: Rebecca Stambler <rstambler@golang.org>
111 lines
2.8 KiB
Go
111 lines
2.8 KiB
Go
// 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"
|
|
"strings"
|
|
|
|
"golang.org/x/tools/internal/lsp"
|
|
"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"
|
|
)
|
|
|
|
// 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 (f *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 := f.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 fmt.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 fmt.Errorf("%v: %v", spn, err)
|
|
}
|
|
sedits, err := lsp.FromProtocolEdits(file.mapper, edits)
|
|
if err != nil {
|
|
return fmt.Errorf("%v: %v", spn, err)
|
|
}
|
|
ops := source.EditsToDiff(sedits)
|
|
lines := diff.SplitLines(string(file.mapper.Content))
|
|
formatted := strings.Join(diff.ApplyEdits(lines, ops), "")
|
|
printIt := true
|
|
if f.List {
|
|
printIt = false
|
|
if len(edits) > 0 {
|
|
fmt.Println(filename)
|
|
}
|
|
}
|
|
if f.Write {
|
|
printIt = false
|
|
if len(edits) > 0 {
|
|
ioutil.WriteFile(filename, []byte(formatted), 0644)
|
|
}
|
|
}
|
|
if f.Diff {
|
|
printIt = false
|
|
u := diff.ToUnified(filename+".orig", filename, lines, ops)
|
|
fmt.Print(u)
|
|
}
|
|
if printIt {
|
|
fmt.Print(formatted)
|
|
}
|
|
}
|
|
return nil
|
|
}
|