diff options
Diffstat (limited to 'internal/span/uri.go')
| -rw-r--r-- | internal/span/uri.go | 169 |
1 files changed, 0 insertions, 169 deletions
diff --git a/internal/span/uri.go b/internal/span/uri.go deleted file mode 100644 index a9777ff85..000000000 --- a/internal/span/uri.go +++ /dev/null @@ -1,169 +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 span - -import ( - "fmt" - "net/url" - "os" - "path" - "path/filepath" - "runtime" - "strings" - "unicode" -) - -const fileScheme = "file" - -// URI represents the full URI for a file. -type URI string - -func (uri URI) IsFile() bool { - return strings.HasPrefix(string(uri), "file://") -} - -// Filename returns the file path for the given URI. -// It is an error to call this on a URI that is not a valid filename. -func (uri URI) Filename() string { - filename, err := filename(uri) - if err != nil { - panic(err) - } - return filepath.FromSlash(filename) -} - -func filename(uri URI) (string, error) { - if uri == "" { - return "", nil - } - u, err := url.ParseRequestURI(string(uri)) - if err != nil { - return "", err - } - if u.Scheme != fileScheme { - return "", fmt.Errorf("only file URIs are supported, got %q from %q", u.Scheme, uri) - } - // If the URI is a Windows URI, we trim the leading "/" and uppercase - // the drive letter, which will never be case sensitive. - if isWindowsDriveURIPath(u.Path) { - u.Path = strings.ToUpper(string(u.Path[1])) + u.Path[2:] - } - return u.Path, nil -} - -func URIFromURI(s string) URI { - if !strings.HasPrefix(s, "file://") { - return URI(s) - } - - if !strings.HasPrefix(s, "file:///") { - // VS Code sends URLs with only two slashes, which are invalid. golang/go#39789. - s = "file:///" + s[len("file://"):] - } - // Even though the input is a URI, it may not be in canonical form. VS Code - // in particular over-escapes :, @, etc. Unescape and re-encode to canonicalize. - path, err := url.PathUnescape(s[len("file://"):]) - if err != nil { - panic(err) - } - - // File URIs from Windows may have lowercase drive letters. - // Since drive letters are guaranteed to be case insensitive, - // we change them to uppercase to remain consistent. - // For example, file:///c:/x/y/z becomes file:///C:/x/y/z. - if isWindowsDriveURIPath(path) { - path = path[:1] + strings.ToUpper(string(path[1])) + path[2:] - } - u := url.URL{Scheme: fileScheme, Path: path} - return URI(u.String()) -} - -func CompareURI(a, b URI) int { - if equalURI(a, b) { - return 0 - } - if a < b { - return -1 - } - return 1 -} - -func equalURI(a, b URI) bool { - if a == b { - return true - } - // If we have the same URI basename, we may still have the same file URIs. - if !strings.EqualFold(path.Base(string(a)), path.Base(string(b))) { - return false - } - fa, err := filename(a) - if err != nil { - return false - } - fb, err := filename(b) - if err != nil { - return false - } - // Stat the files to check if they are equal. - infoa, err := os.Stat(filepath.FromSlash(fa)) - if err != nil { - return false - } - infob, err := os.Stat(filepath.FromSlash(fb)) - if err != nil { - return false - } - return os.SameFile(infoa, infob) -} - -// URIFromPath returns a span URI for the supplied file path. -// It will always have the file scheme. -func URIFromPath(path string) URI { - if path == "" { - return "" - } - // Handle standard library paths that contain the literal "$GOROOT". - // TODO(rstambler): The go/packages API should allow one to determine a user's $GOROOT. - const prefix = "$GOROOT" - if len(path) >= len(prefix) && strings.EqualFold(prefix, path[:len(prefix)]) { - suffix := path[len(prefix):] - path = runtime.GOROOT() + suffix - } - if !isWindowsDrivePath(path) { - if abs, err := filepath.Abs(path); err == nil { - path = abs - } - } - // Check the file path again, in case it became absolute. - if isWindowsDrivePath(path) { - path = "/" + strings.ToUpper(string(path[0])) + path[1:] - } - path = filepath.ToSlash(path) - u := url.URL{ - Scheme: fileScheme, - Path: path, - } - return URI(u.String()) -} - -// isWindowsDrivePath returns true if the file path is of the form used by -// Windows. We check if the path begins with a drive letter, followed by a ":". -// For example: C:/x/y/z. -func isWindowsDrivePath(path string) bool { - if len(path) < 3 { - return false - } - return unicode.IsLetter(rune(path[0])) && path[1] == ':' -} - -// isWindowsDriveURI returns true if the file URI is of the format used by -// Windows URIs. The url.Parse package does not specially handle Windows paths -// (see golang/go#6027), so we check if the URI path has a drive prefix (e.g. "/C:"). -func isWindowsDriveURIPath(uri string) bool { - if len(uri) < 4 { - return false - } - return uri[0] == '/' && unicode.IsLetter(rune(uri[1])) && uri[2] == ':' -} |