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cmd/gofmt: fix symlink file truncation #79774

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cmd/gofmt: fix symlink file truncation #79774

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6 changes: 3 additions & 3 deletions src/cmd/gofmt/gofmt.go
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Original file line number Diff line number Diff line change
Expand Up @@ -280,7 +280,7 @@ func processFile(filename string, info fs.FileInfo, in io.Reader, r *reporter) e
}

perm := info.Mode().Perm()
if err := writeFile(filename, src, res, perm, info.Size()); err != nil {
if err := writeFile(filename, src, res, perm); err != nil {
return err
}
}
Expand Down Expand Up @@ -465,7 +465,7 @@ func fileWeight(path string, info fs.FileInfo) int64 {
}

// writeFile updates a file with the new formatted data.
func writeFile(filename string, orig, formatted []byte, perm fs.FileMode, size int64) error {
func writeFile(filename string, orig, formatted []byte, perm fs.FileMode) error {
// Make a temporary backup file before rewriting the original file.
bakname, err := backupFile(filename, orig, perm)
if err != nil {
Expand All @@ -489,7 +489,7 @@ func writeFile(filename string, orig, formatted []byte, perm fs.FileMode, size i
}

n, err := fout.Write(formatted)
if err == nil && int64(n) < size {
if err == nil {
err = fout.Truncate(int64(n))
}

Expand Down