.gitignore added
[dotfiles/.git] / .config / coc / extensions / coc-go-data / tools / pkg / mod / golang.org / x / tools@v0.1.0 / internal / lsp / cmd / format.go
diff --git a/.config/coc/extensions/coc-go-data/tools/pkg/mod/golang.org/x/tools@v0.1.0/internal/lsp/cmd/format.go b/.config/coc/extensions/coc-go-data/tools/pkg/mod/golang.org/x/tools@v0.1.0/internal/lsp/cmd/format.go
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+// 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
+}