diff options
Diffstat (limited to 'vendor/golang.org/x/tools/go/buildutil/overlay.go')
-rw-r--r-- | vendor/golang.org/x/tools/go/buildutil/overlay.go | 103 |
1 files changed, 0 insertions, 103 deletions
diff --git a/vendor/golang.org/x/tools/go/buildutil/overlay.go b/vendor/golang.org/x/tools/go/buildutil/overlay.go deleted file mode 100644 index 3f71c4fe..00000000 --- a/vendor/golang.org/x/tools/go/buildutil/overlay.go +++ /dev/null @@ -1,103 +0,0 @@ -// Copyright 2016 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 buildutil - -import ( - "bufio" - "bytes" - "fmt" - "go/build" - "io" - "io/ioutil" - "path/filepath" - "strconv" - "strings" -) - -// OverlayContext overlays a build.Context with additional files from -// a map. Files in the map take precedence over other files. -// -// In addition to plain string comparison, two file names are -// considered equal if their base names match and their directory -// components point at the same directory on the file system. That is, -// symbolic links are followed for directories, but not files. -// -// A common use case for OverlayContext is to allow editors to pass in -// a set of unsaved, modified files. -// -// Currently, only the Context.OpenFile function will respect the -// overlay. This may change in the future. -func OverlayContext(orig *build.Context, overlay map[string][]byte) *build.Context { - // TODO(dominikh): Implement IsDir, HasSubdir and ReadDir - - rc := func(data []byte) (io.ReadCloser, error) { - return ioutil.NopCloser(bytes.NewBuffer(data)), nil - } - - copy := *orig // make a copy - ctxt := © - ctxt.OpenFile = func(path string) (io.ReadCloser, error) { - // Fast path: names match exactly. - if content, ok := overlay[path]; ok { - return rc(content) - } - - // Slow path: check for same file under a different - // alias, perhaps due to a symbolic link. - for filename, content := range overlay { - if sameFile(path, filename) { - return rc(content) - } - } - - return OpenFile(orig, path) - } - return ctxt -} - -// ParseOverlayArchive parses an archive containing Go files and their -// contents. The result is intended to be used with OverlayContext. -// -// -// Archive format -// -// The archive consists of a series of files. Each file consists of a -// name, a decimal file size and the file contents, separated by -// newlinews. No newline follows after the file contents. -func ParseOverlayArchive(archive io.Reader) (map[string][]byte, error) { - overlay := make(map[string][]byte) - r := bufio.NewReader(archive) - for { - // Read file name. - filename, err := r.ReadString('\n') - if err != nil { - if err == io.EOF { - break // OK - } - return nil, fmt.Errorf("reading archive file name: %v", err) - } - filename = filepath.Clean(strings.TrimSpace(filename)) - - // Read file size. - sz, err := r.ReadString('\n') - if err != nil { - return nil, fmt.Errorf("reading size of archive file %s: %v", filename, err) - } - sz = strings.TrimSpace(sz) - size, err := strconv.ParseUint(sz, 10, 32) - if err != nil { - return nil, fmt.Errorf("parsing size of archive file %s: %v", filename, err) - } - - // Read file content. - content := make([]byte, size) - if _, err := io.ReadFull(r, content); err != nil { - return nil, fmt.Errorf("reading archive file %s: %v", filename, err) - } - overlay[filename] = content - } - - return overlay, nil -} |