diff options
Diffstat (limited to 'misc/cgo/testplugin/overlaydir_test.go')
-rw-r--r-- | misc/cgo/testplugin/overlaydir_test.go | 78 |
1 files changed, 0 insertions, 78 deletions
diff --git a/misc/cgo/testplugin/overlaydir_test.go b/misc/cgo/testplugin/overlaydir_test.go deleted file mode 100644 index e2c32d83ce..0000000000 --- a/misc/cgo/testplugin/overlaydir_test.go +++ /dev/null @@ -1,78 +0,0 @@ -// 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 plugin_test - -import ( - "io" - "os" - "path/filepath" - "strings" -) - -// overlayDir makes a minimal-overhead copy of srcRoot in which new files may be added. -// -// TODO: Once we no longer need to support the misc module in GOPATH mode, -// factor this function out into a package to reduce duplication. -func overlayDir(dstRoot, srcRoot string) error { - dstRoot = filepath.Clean(dstRoot) - if err := os.MkdirAll(dstRoot, 0777); err != nil { - return err - } - - srcRoot, err := filepath.Abs(srcRoot) - if err != nil { - return err - } - - return filepath.Walk(srcRoot, func(srcPath string, info os.FileInfo, err error) error { - if err != nil || srcPath == srcRoot { - return err - } - - suffix := strings.TrimPrefix(srcPath, srcRoot) - for len(suffix) > 0 && suffix[0] == filepath.Separator { - suffix = suffix[1:] - } - dstPath := filepath.Join(dstRoot, suffix) - - perm := info.Mode() & os.ModePerm - if info.Mode()&os.ModeSymlink != 0 { - info, err = os.Stat(srcPath) - if err != nil { - return err - } - perm = info.Mode() & os.ModePerm - } - - // Always copy directories (don't symlink them). - // If we add a file in the overlay, we don't want to add it in the original. - if info.IsDir() { - return os.MkdirAll(dstPath, perm|0200) - } - - // If the OS supports symlinks, use them instead of copying bytes. - if err := os.Symlink(srcPath, dstPath); err == nil { - return nil - } - - // Otherwise, copy the bytes. - src, err := os.Open(srcPath) - if err != nil { - return err - } - defer src.Close() - - dst, err := os.OpenFile(dstPath, os.O_WRONLY|os.O_CREATE|os.O_EXCL, perm) - if err != nil { - return err - } - - _, err = io.Copy(dst, src) - if closeErr := dst.Close(); err == nil { - err = closeErr - } - return err - }) -} |