summaryrefslogtreecommitdiff
path: root/src/pkg/path/filepath
diff options
context:
space:
mode:
Diffstat (limited to 'src/pkg/path/filepath')
-rw-r--r--src/pkg/path/filepath/Makefile32
-rw-r--r--src/pkg/path/filepath/match.go294
-rw-r--r--src/pkg/path/filepath/match_test.go134
-rw-r--r--src/pkg/path/filepath/path.go358
-rw-r--r--src/pkg/path/filepath/path_plan9.go23
-rw-r--r--src/pkg/path/filepath/path_test.go576
-rw-r--r--src/pkg/path/filepath/path_unix.go23
-rw-r--r--src/pkg/path/filepath/path_windows.go46
8 files changed, 1486 insertions, 0 deletions
diff --git a/src/pkg/path/filepath/Makefile b/src/pkg/path/filepath/Makefile
new file mode 100644
index 000000000..af250ab33
--- /dev/null
+++ b/src/pkg/path/filepath/Makefile
@@ -0,0 +1,32 @@
+# Copyright 2009 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.
+
+include ../../../Make.inc
+
+TARG=path/filepath
+GOFILES=\
+ match.go\
+ path.go\
+
+GOFILES_freebsd=\
+ path_unix.go
+
+GOFILES_darwin=\
+ path_unix.go
+
+GOFILES_linux=\
+ path_unix.go
+
+GOFILES_openbsd=\
+ path_unix.go
+
+GOFILES_plan9=\
+ path_plan9.go
+
+GOFILES_windows=\
+ path_windows.go
+
+GOFILES+=$(GOFILES_$(GOOS))
+
+include ../../../Make.pkg
diff --git a/src/pkg/path/filepath/match.go b/src/pkg/path/filepath/match.go
new file mode 100644
index 000000000..7fcc214c0
--- /dev/null
+++ b/src/pkg/path/filepath/match.go
@@ -0,0 +1,294 @@
+// Copyright 2010 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 filepath
+
+import (
+ "os"
+ "sort"
+ "strings"
+ "utf8"
+)
+
+var ErrBadPattern = os.NewError("syntax error in pattern")
+
+// Match returns true if name matches the shell file name pattern.
+// The pattern syntax is:
+//
+// pattern:
+// { term }
+// term:
+// '*' matches any sequence of non-Separator characters
+// '?' matches any single non-Separator character
+// '[' [ '^' ] { character-range } ']'
+// character class (must be non-empty)
+// c matches character c (c != '*', '?', '\\', '[')
+// '\\' c matches character c
+//
+// character-range:
+// c matches character c (c != '\\', '-', ']')
+// '\\' c matches character c
+// lo '-' hi matches character c for lo <= c <= hi
+//
+// Match requires pattern to match all of name, not just a substring.
+// The only possible error return occurs when the pattern is malformed.
+//
+func Match(pattern, name string) (matched bool, err os.Error) {
+Pattern:
+ for len(pattern) > 0 {
+ var star bool
+ var chunk string
+ star, chunk, pattern = scanChunk(pattern)
+ if star && chunk == "" {
+ // Trailing * matches rest of string unless it has a /.
+ return strings.Index(name, string(Separator)) < 0, nil
+ }
+ // Look for match at current position.
+ t, ok, err := matchChunk(chunk, name)
+ // if we're the last chunk, make sure we've exhausted the name
+ // otherwise we'll give a false result even if we could still match
+ // using the star
+ if ok && (len(t) == 0 || len(pattern) > 0) {
+ name = t
+ continue
+ }
+ if err != nil {
+ return false, err
+ }
+ if star {
+ // Look for match skipping i+1 bytes.
+ // Cannot skip /.
+ for i := 0; i < len(name) && name[i] != Separator; i++ {
+ t, ok, err := matchChunk(chunk, name[i+1:])
+ if ok {
+ // if we're the last chunk, make sure we exhausted the name
+ if len(pattern) == 0 && len(t) > 0 {
+ continue
+ }
+ name = t
+ continue Pattern
+ }
+ if err != nil {
+ return false, err
+ }
+ }
+ }
+ return false, nil
+ }
+ return len(name) == 0, nil
+}
+
+// scanChunk gets the next segment of pattern, which is a non-star string
+// possibly preceded by a star.
+func scanChunk(pattern string) (star bool, chunk, rest string) {
+ for len(pattern) > 0 && pattern[0] == '*' {
+ pattern = pattern[1:]
+ star = true
+ }
+ inrange := false
+ var i int
+Scan:
+ for i = 0; i < len(pattern); i++ {
+ switch pattern[i] {
+ case '\\':
+ // error check handled in matchChunk: bad pattern.
+ if i+1 < len(pattern) {
+ i++
+ }
+ case '[':
+ inrange = true
+ case ']':
+ inrange = false
+ case '*':
+ if !inrange {
+ break Scan
+ }
+ }
+ }
+ return star, pattern[0:i], pattern[i:]
+}
+
+// matchChunk checks whether chunk matches the beginning of s.
+// If so, it returns the remainder of s (after the match).
+// Chunk is all single-character operators: literals, char classes, and ?.
+func matchChunk(chunk, s string) (rest string, ok bool, err os.Error) {
+ for len(chunk) > 0 {
+ if len(s) == 0 {
+ return
+ }
+ switch chunk[0] {
+ case '[':
+ // character class
+ r, n := utf8.DecodeRuneInString(s)
+ s = s[n:]
+ chunk = chunk[1:]
+ // possibly negated
+ negated := chunk[0] == '^'
+ if negated {
+ chunk = chunk[1:]
+ }
+ // parse all ranges
+ match := false
+ nrange := 0
+ for {
+ if len(chunk) > 0 && chunk[0] == ']' && nrange > 0 {
+ chunk = chunk[1:]
+ break
+ }
+ var lo, hi int
+ if lo, chunk, err = getEsc(chunk); err != nil {
+ return
+ }
+ hi = lo
+ if chunk[0] == '-' {
+ if hi, chunk, err = getEsc(chunk[1:]); err != nil {
+ return
+ }
+ }
+ if lo <= r && r <= hi {
+ match = true
+ }
+ nrange++
+ }
+ if match == negated {
+ return
+ }
+
+ case '?':
+ if s[0] == Separator {
+ return
+ }
+ _, n := utf8.DecodeRuneInString(s)
+ s = s[n:]
+ chunk = chunk[1:]
+
+ case '\\':
+ chunk = chunk[1:]
+ if len(chunk) == 0 {
+ err = ErrBadPattern
+ return
+ }
+ fallthrough
+
+ default:
+ if chunk[0] != s[0] {
+ return
+ }
+ s = s[1:]
+ chunk = chunk[1:]
+ }
+ }
+ return s, true, nil
+}
+
+// getEsc gets a possibly-escaped character from chunk, for a character class.
+func getEsc(chunk string) (r int, nchunk string, err os.Error) {
+ if len(chunk) == 0 || chunk[0] == '-' || chunk[0] == ']' {
+ err = ErrBadPattern
+ return
+ }
+ if chunk[0] == '\\' {
+ chunk = chunk[1:]
+ if len(chunk) == 0 {
+ err = ErrBadPattern
+ return
+ }
+ }
+ r, n := utf8.DecodeRuneInString(chunk)
+ if r == utf8.RuneError && n == 1 {
+ err = ErrBadPattern
+ }
+ nchunk = chunk[n:]
+ if len(nchunk) == 0 {
+ err = ErrBadPattern
+ }
+ return
+}
+
+// Glob returns the names of all files matching pattern or nil
+// if there is no matching file. The syntax of patterns is the same
+// as in Match. The pattern may describe hierarchical names such as
+// /usr/*/bin/ed (assuming the Separator is '/').
+// The only possible error return occurs when the pattern is malformed.
+//
+func Glob(pattern string) (matches []string, err os.Error) {
+ if !hasMeta(pattern) {
+ if _, err = os.Stat(pattern); err != nil {
+ return
+ }
+ return []string{pattern}, nil
+ }
+
+ dir, file := Split(pattern)
+ switch dir {
+ case "":
+ dir = "."
+ case string(Separator):
+ // nothing
+ default:
+ dir = dir[0 : len(dir)-1] // chop off trailing separator
+ }
+
+ if !hasMeta(dir) {
+ return glob(dir, file, nil)
+ }
+
+ var m []string
+ m, err = Glob(dir)
+ if err != nil {
+ return
+ }
+ for _, d := range m {
+ matches, err = glob(d, file, matches)
+ if err != nil {
+ return
+ }
+ }
+ return
+}
+
+// glob searches for files matching pattern in the directory dir
+// and appends them to matches. If the directory cannot be
+// opened, it returns the existing matches. New matches are
+// added in lexicographical order.
+// The only possible error return occurs when the pattern is malformed.
+func glob(dir, pattern string, matches []string) (m []string, e os.Error) {
+ m = matches
+ fi, err := os.Stat(dir)
+ if err != nil {
+ return
+ }
+ if !fi.IsDirectory() {
+ return
+ }
+ d, err := os.Open(dir)
+ if err != nil {
+ return
+ }
+ defer d.Close()
+
+ names, err := d.Readdirnames(-1)
+ if err != nil {
+ return
+ }
+ sort.Strings(names)
+
+ for _, n := range names {
+ matched, err := Match(pattern, n)
+ if err != nil {
+ return m, err
+ }
+ if matched {
+ m = append(m, Join(dir, n))
+ }
+ }
+ return
+}
+
+// hasMeta returns true if path contains any of the magic characters
+// recognized by Match.
+func hasMeta(path string) bool {
+ // TODO(niemeyer): Should other magic characters be added here?
+ return strings.IndexAny(path, "*?[") >= 0
+}
diff --git a/src/pkg/path/filepath/match_test.go b/src/pkg/path/filepath/match_test.go
new file mode 100644
index 000000000..a1c8333f3
--- /dev/null
+++ b/src/pkg/path/filepath/match_test.go
@@ -0,0 +1,134 @@
+// Copyright 2009 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 filepath_test
+
+import (
+ "os"
+ . "path/filepath"
+ "testing"
+ "runtime"
+)
+
+type MatchTest struct {
+ pattern, s string
+ match bool
+ err os.Error
+}
+
+var matchTests = []MatchTest{
+ {"abc", "abc", true, nil},
+ {"*", "abc", true, nil},
+ {"*c", "abc", true, nil},
+ {"a*", "a", true, nil},
+ {"a*", "abc", true, nil},
+ {"a*", "ab/c", false, nil},
+ {"a*/b", "abc/b", true, nil},
+ {"a*/b", "a/c/b", false, nil},
+ {"a*b*c*d*e*/f", "axbxcxdxe/f", true, nil},
+ {"a*b*c*d*e*/f", "axbxcxdxexxx/f", true, nil},
+ {"a*b*c*d*e*/f", "axbxcxdxe/xxx/f", false, nil},
+ {"a*b*c*d*e*/f", "axbxcxdxexxx/fff", false, nil},
+ {"a*b?c*x", "abxbbxdbxebxczzx", true, nil},
+ {"a*b?c*x", "abxbbxdbxebxczzy", false, nil},
+ {"ab[c]", "abc", true, nil},
+ {"ab[b-d]", "abc", true, nil},
+ {"ab[e-g]", "abc", false, nil},
+ {"ab[^c]", "abc", false, nil},
+ {"ab[^b-d]", "abc", false, nil},
+ {"ab[^e-g]", "abc", true, nil},
+ {"a\\*b", "a*b", true, nil},
+ {"a\\*b", "ab", false, nil},
+ {"a?b", "a☺b", true, nil},
+ {"a[^a]b", "a☺b", true, nil},
+ {"a???b", "a☺b", false, nil},
+ {"a[^a][^a][^a]b", "a☺b", false, nil},
+ {"[a-ζ]*", "α", true, nil},
+ {"*[a-ζ]", "A", false, nil},
+ {"a?b", "a/b", false, nil},
+ {"a*b", "a/b", false, nil},
+ {"[\\]a]", "]", true, nil},
+ {"[\\-]", "-", true, nil},
+ {"[x\\-]", "x", true, nil},
+ {"[x\\-]", "-", true, nil},
+ {"[x\\-]", "z", false, nil},
+ {"[\\-x]", "x", true, nil},
+ {"[\\-x]", "-", true, nil},
+ {"[\\-x]", "a", false, nil},
+ {"[]a]", "]", false, ErrBadPattern},
+ {"[-]", "-", false, ErrBadPattern},
+ {"[x-]", "x", false, ErrBadPattern},
+ {"[x-]", "-", false, ErrBadPattern},
+ {"[x-]", "z", false, ErrBadPattern},
+ {"[-x]", "x", false, ErrBadPattern},
+ {"[-x]", "-", false, ErrBadPattern},
+ {"[-x]", "a", false, ErrBadPattern},
+ {"\\", "a", false, ErrBadPattern},
+ {"[a-b-c]", "a", false, ErrBadPattern},
+ {"*x", "xxx", true, nil},
+}
+
+func errp(e os.Error) string {
+ if e == nil {
+ return "<nil>"
+ }
+ return e.String()
+}
+
+func TestMatch(t *testing.T) {
+ if runtime.GOOS == "windows" {
+ // XXX: Don't pass for windows.
+ return
+ }
+ for _, tt := range matchTests {
+ ok, err := Match(tt.pattern, tt.s)
+ if ok != tt.match || err != tt.err {
+ t.Errorf("Match(%#q, %#q) = %v, %q want %v, %q", tt.pattern, tt.s, ok, errp(err), tt.match, errp(tt.err))
+ }
+ }
+}
+
+// contains returns true if vector contains the string s.
+func contains(vector []string, s string) bool {
+ s = ToSlash(s)
+ for _, elem := range vector {
+ if elem == s {
+ return true
+ }
+ }
+ return false
+}
+
+var globTests = []struct {
+ pattern, result string
+}{
+ {"match.go", "match.go"},
+ {"mat?h.go", "match.go"},
+ {"*", "match.go"},
+ {"../*/match.go", "../filepath/match.go"},
+}
+
+func TestGlob(t *testing.T) {
+ if runtime.GOOS == "windows" {
+ // XXX: Don't pass for windows.
+ return
+ }
+ for _, tt := range globTests {
+ matches, err := Glob(tt.pattern)
+ if err != nil {
+ t.Errorf("Glob error for %q: %s", tt.pattern, err)
+ continue
+ }
+ if !contains(matches, tt.result) {
+ t.Errorf("Glob(%#q) = %#v want %v", tt.pattern, matches, tt.result)
+ }
+ }
+}
+
+func TestGlobError(t *testing.T) {
+ _, err := Glob("[7]")
+ if err != nil {
+ t.Error("expected error for bad pattern; got none")
+ }
+}
diff --git a/src/pkg/path/filepath/path.go b/src/pkg/path/filepath/path.go
new file mode 100644
index 000000000..3d5b915c1
--- /dev/null
+++ b/src/pkg/path/filepath/path.go
@@ -0,0 +1,358 @@
+// Copyright 2009 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 filepath implements utility routines for manipulating filename paths
+// in a way compatible with the target operating system-defined file paths.
+package filepath
+
+import (
+ "bytes"
+ "os"
+ "runtime"
+ "sort"
+ "strings"
+)
+
+const (
+ Separator = os.PathSeparator
+ ListSeparator = os.PathListSeparator
+)
+
+// Clean returns the shortest path name equivalent to path
+// by purely lexical processing. It applies the following rules
+// iteratively until no further processing can be done:
+//
+// 1. Replace multiple Separator elements with a single one.
+// 2. Eliminate each . path name element (the current directory).
+// 3. Eliminate each inner .. path name element (the parent directory)
+// along with the non-.. element that precedes it.
+// 4. Eliminate .. elements that begin a rooted path:
+// that is, replace "/.." by "/" at the beginning of a path,
+// assuming Separator is '/'.
+//
+// If the result of this process is an empty string, Clean
+// returns the string ".".
+//
+// See also Rob Pike, ``Lexical File Names in Plan 9 or
+// Getting Dot-Dot right,''
+// http://plan9.bell-labs.com/sys/doc/lexnames.html
+func Clean(path string) string {
+ vol := VolumeName(path)
+ path = path[len(vol):]
+ if path == "" {
+ return vol + "."
+ }
+
+ rooted := os.IsPathSeparator(path[0])
+
+ // Invariants:
+ // reading from path; r is index of next byte to process.
+ // writing to buf; w is index of next byte to write.
+ // dotdot is index in buf where .. must stop, either because
+ // it is the leading slash or it is a leading ../../.. prefix.
+ n := len(path)
+ buf := []byte(path)
+ r, w, dotdot := 0, 0, 0
+ if rooted {
+ buf[0] = Separator
+ r, w, dotdot = 1, 1, 1
+ }
+
+ for r < n {
+ switch {
+ case os.IsPathSeparator(path[r]):
+ // empty path element
+ r++
+ case path[r] == '.' && (r+1 == n || os.IsPathSeparator(path[r+1])):
+ // . element
+ r++
+ case path[r] == '.' && path[r+1] == '.' && (r+2 == n || os.IsPathSeparator(path[r+2])):
+ // .. element: remove to last separator
+ r += 2
+ switch {
+ case w > dotdot:
+ // can backtrack
+ w--
+ for w > dotdot && !os.IsPathSeparator(buf[w]) {
+ w--
+ }
+ case !rooted:
+ // cannot backtrack, but not rooted, so append .. element.
+ if w > 0 {
+ buf[w] = Separator
+ w++
+ }
+ buf[w] = '.'
+ w++
+ buf[w] = '.'
+ w++
+ dotdot = w
+ }
+ default:
+ // real path element.
+ // add slash if needed
+ if rooted && w != 1 || !rooted && w != 0 {
+ buf[w] = Separator
+ w++
+ }
+ // copy element
+ for ; r < n && !os.IsPathSeparator(path[r]); r++ {
+ buf[w] = path[r]
+ w++
+ }
+ }
+ }
+
+ // Turn empty string into "."
+ if w == 0 {
+ buf[w] = '.'
+ w++
+ }
+
+ return FromSlash(vol + string(buf[0:w]))
+}
+
+// ToSlash returns the result of replacing each separator character
+// in path with a slash ('/') character.
+func ToSlash(path string) string {
+ if Separator == '/' {
+ return path
+ }
+ return strings.Replace(path, string(Separator), "/", -1)
+}
+
+// FromSlash returns the result of replacing each slash ('/') character
+// in path with a separator character.
+func FromSlash(path string) string {
+ if Separator == '/' {
+ return path
+ }
+ return strings.Replace(path, "/", string(Separator), -1)
+}
+
+// SplitList splits a list of paths joined by the OS-specific ListSeparator.
+func SplitList(path string) []string {
+ if path == "" {
+ return []string{}
+ }
+ return strings.Split(path, string(ListSeparator))
+}
+
+// Split splits path immediately following the final Separator,
+// separating it into a directory and file name component.
+// If there is no Separator in path, Split returns an empty dir
+// and file set to path.
+func Split(path string) (dir, file string) {
+ i := len(path) - 1
+ for i >= 0 && !os.IsPathSeparator(path[i]) {
+ i--
+ }
+ return path[:i+1], path[i+1:]
+}
+
+// Join joins any number of path elements into a single path, adding
+// a Separator if necessary. All empty strings are ignored.
+func Join(elem ...string) string {
+ for i, e := range elem {
+ if e != "" {
+ return Clean(strings.Join(elem[i:], string(Separator)))
+ }
+ }
+ return ""
+}
+
+// Ext returns the file name extension used by path.
+// The extension is the suffix beginning at the final dot
+// in the final element of path; it is empty if there is
+// no dot.
+func Ext(path string) string {
+ for i := len(path) - 1; i >= 0 && !os.IsPathSeparator(path[i]); i-- {
+ if path[i] == '.' {
+ return path[i:]
+ }
+ }
+ return ""
+}
+
+// EvalSymlinks returns the path name after the evaluation of any symbolic
+// links.
+// If path is relative it will be evaluated relative to the current directory.
+func EvalSymlinks(path string) (string, os.Error) {
+ if runtime.GOOS == "windows" {
+ // Symlinks are not supported under windows.
+ _, err := os.Lstat(path)
+ if err != nil {
+ return "", err
+ }
+ return Clean(path), nil
+ }
+ const maxIter = 255
+ originalPath := path
+ // consume path by taking each frontmost path element,
+ // expanding it if it's a symlink, and appending it to b
+ var b bytes.Buffer
+ for n := 0; path != ""; n++ {
+ if n > maxIter {
+ return "", os.NewError("EvalSymlinks: too many links in " + originalPath)
+ }
+
+ // find next path component, p
+ i := strings.IndexRune(path, Separator)
+ var p string
+ if i == -1 {
+ p, path = path, ""
+ } else {
+ p, path = path[:i], path[i+1:]
+ }
+
+ if p == "" {
+ if b.Len() == 0 {
+ // must be absolute path
+ b.WriteRune(Separator)
+ }
+ continue
+ }
+
+ fi, err := os.Lstat(b.String() + p)
+ if err != nil {
+ return "", err
+ }
+ if !fi.IsSymlink() {
+ b.WriteString(p)
+ if path != "" {
+ b.WriteRune(Separator)
+ }
+ continue
+ }
+
+ // it's a symlink, put it at the front of path
+ dest, err := os.Readlink(b.String() + p)
+ if err != nil {
+ return "", err
+ }
+ if IsAbs(dest) {
+ b.Reset()
+ }
+ path = dest + string(Separator) + path
+ }
+ return Clean(b.String()), nil
+}
+
+// Abs returns an absolute representation of path.
+// If the path is not absolute it will be joined with the current
+// working directory to turn it into an absolute path. The absolute
+// path name for a given file is not guaranteed to be unique.
+func Abs(path string) (string, os.Error) {
+ if IsAbs(path) {
+ return Clean(path), nil
+ }
+ wd, err := os.Getwd()
+ if err != nil {
+ return "", err
+ }
+ return Join(wd, path), nil
+}
+
+// Visitor methods are invoked for corresponding file tree entries
+// visited by Walk. The parameter path is the full path of f relative
+// to root.
+type Visitor interface {
+ VisitDir(path string, f *os.FileInfo) bool
+ VisitFile(path string, f *os.FileInfo)
+}
+
+func walk(path string, f *os.FileInfo, v Visitor, errors chan<- os.Error) {
+ if !f.IsDirectory() {
+ v.VisitFile(path, f)
+ return
+ }
+
+ if !v.VisitDir(path, f) {
+ return // skip directory entries
+ }
+
+ list, err := readDir(path)
+ if err != nil {
+ if errors != nil {
+ errors <- err
+ }
+ }
+
+ for _, e := range list {
+ walk(Join(path, e.Name), e, v, errors)
+ }
+}
+
+// readDir reads the directory named by dirname and returns
+// a list of sorted directory entries.
+// Copied from io/ioutil to avoid the circular import.
+func readDir(dirname string) ([]*os.FileInfo, os.Error) {
+ f, err := os.Open(dirname)
+ if err != nil {
+ return nil, err
+ }
+ list, err := f.Readdir(-1)
+ f.Close()
+ if err != nil {
+ return nil, err
+ }
+ fi := make(fileInfoList, len(list))
+ for i := range list {
+ fi[i] = &list[i]
+ }
+ sort.Sort(fi)
+ return fi, nil
+}
+
+// A dirList implements sort.Interface.
+type fileInfoList []*os.FileInfo
+
+func (f fileInfoList) Len() int { return len(f) }
+func (f fileInfoList) Less(i, j int) bool { return f[i].Name < f[j].Name }
+func (f fileInfoList) Swap(i, j int) { f[i], f[j] = f[j], f[i] }
+
+// Walk walks the file tree rooted at root, calling v.VisitDir or
+// v.VisitFile for each directory or file in the tree, including root.
+// If v.VisitDir returns false, Walk skips the directory's entries;
+// otherwise it invokes itself for each directory entry in sorted order.
+// An error reading a directory does not abort the Walk.
+// If errors != nil, Walk sends each directory read error
+// to the channel. Otherwise Walk discards the error.
+func Walk(root string, v Visitor, errors chan<- os.Error) {
+ f, err := os.Lstat(root)
+ if err != nil {
+ if errors != nil {
+ errors <- err
+ }
+ return // can't progress
+ }
+ walk(root, f, v, errors)
+}
+
+// Base returns the last element of path.
+// Trailing path separators are removed before extracting the last element.
+// If the path is empty, Base returns ".".
+// If the path consists entirely of separators, Base returns a single separator.
+func Base(path string) string {
+ if path == "" {
+ return "."
+ }
+ // Strip trailing slashes.
+ for len(path) > 0 && os.IsPathSeparator(path[len(path)-1]) {
+ path = path[0 : len(path)-1]
+ }
+ // Find the last element
+ i := len(path) - 1
+ for i >= 0 && !os.IsPathSeparator(path[i]) {
+ i--
+ }
+ if i >= 0 {
+ path = path[i+1:]
+ }
+ // If empty now, it had only slashes.
+ if path == "" {
+ return string(Separator)
+ }
+ return path
+}
diff --git a/src/pkg/path/filepath/path_plan9.go b/src/pkg/path/filepath/path_plan9.go
new file mode 100644
index 000000000..17b873f1a
--- /dev/null
+++ b/src/pkg/path/filepath/path_plan9.go
@@ -0,0 +1,23 @@
+// Copyright 2010 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 filepath
+
+import "strings"
+
+// IsAbs returns true if the path is absolute.
+func IsAbs(path string) bool {
+ return strings.HasPrefix(path, "/") || strings.HasPrefix(path, "#")
+}
+
+// VolumeName returns the leading volume name on Windows.
+// It returns "" elsewhere
+func VolumeName(path string) string {
+ return ""
+}
+
+// HasPrefix tests whether the path p begins with prefix.
+func HasPrefix(p, prefix string) bool {
+ return strings.HasPrefix(p, prefix)
+}
diff --git a/src/pkg/path/filepath/path_test.go b/src/pkg/path/filepath/path_test.go
new file mode 100644
index 000000000..d2a10698e
--- /dev/null
+++ b/src/pkg/path/filepath/path_test.go
@@ -0,0 +1,576 @@
+// Copyright 2009 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 filepath_test
+
+import (
+ "os"
+ "path/filepath"
+ "reflect"
+ "runtime"
+ "strings"
+ "testing"
+)
+
+type PathTest struct {
+ path, result string
+}
+
+var cleantests = []PathTest{
+ // Already clean
+ {"", "."},
+ {"abc", "abc"},
+ {"abc/def", "abc/def"},
+ {"a/b/c", "a/b/c"},
+ {".", "."},
+ {"..", ".."},
+ {"../..", "../.."},
+ {"../../abc", "../../abc"},
+ {"/abc", "/abc"},
+ {"/", "/"},
+
+ // Remove trailing slash
+ {"abc/", "abc"},
+ {"abc/def/", "abc/def"},
+ {"a/b/c/", "a/b/c"},
+ {"./", "."},
+ {"../", ".."},
+ {"../../", "../.."},
+ {"/abc/", "/abc"},
+
+ // Remove doubled slash
+ {"abc//def//ghi", "abc/def/ghi"},
+ {"//abc", "/abc"},
+ {"///abc", "/abc"},
+ {"//abc//", "/abc"},
+ {"abc//", "abc"},
+
+ // Remove . elements
+ {"abc/./def", "abc/def"},
+ {"/./abc/def", "/abc/def"},
+ {"abc/.", "abc"},
+
+ // Remove .. elements
+ {"abc/def/ghi/../jkl", "abc/def/jkl"},
+ {"abc/def/../ghi/../jkl", "abc/jkl"},
+ {"abc/def/..", "abc"},
+ {"abc/def/../..", "."},
+ {"/abc/def/../..", "/"},
+ {"abc/def/../../..", ".."},
+ {"/abc/def/../../..", "/"},
+ {"abc/def/../../../ghi/jkl/../../../mno", "../../mno"},
+
+ // Combinations
+ {"abc/./../def", "def"},
+ {"abc//./../def", "def"},
+ {"abc/../../././../def", "../../def"},
+}
+
+var wincleantests = []PathTest{
+ {`c:`, `c:.`},
+ {`c:\`, `c:\`},
+ {`c:\abc`, `c:\abc`},
+ {`c:abc\..\..\.\.\..\def`, `c:..\..\def`},
+ {`c:\abc\def\..\..`, `c:\`},
+ {`c:..\abc`, `c:..\abc`},
+ {`\`, `\`},
+ {`/`, `\`},
+}
+
+func TestClean(t *testing.T) {
+ tests := cleantests
+ if runtime.GOOS == "windows" {
+ for i, _ := range tests {
+ tests[i].result = filepath.FromSlash(tests[i].result)
+ }
+ tests = append(tests, wincleantests...)
+ }
+ for _, test := range tests {
+ if s := filepath.Clean(test.path); s != test.result {
+ t.Errorf("Clean(%q) = %q, want %q", test.path, s, test.result)
+ }
+ }
+}
+
+const sep = filepath.Separator
+
+var slashtests = []PathTest{
+ {"", ""},
+ {"/", string(sep)},
+ {"/a/b", string([]byte{sep, 'a', sep, 'b'})},
+ {"a//b", string([]byte{'a', sep, sep, 'b'})},
+}
+
+func TestFromAndToSlash(t *testing.T) {
+ for _, test := range slashtests {
+ if s := filepath.FromSlash(test.path); s != test.result {
+ t.Errorf("FromSlash(%q) = %q, want %q", test.path, s, test.result)
+ }
+ if s := filepath.ToSlash(test.result); s != test.path {
+ t.Errorf("ToSlash(%q) = %q, want %q", test.result, s, test.path)
+ }
+ }
+}
+
+type SplitListTest struct {
+ list string
+ result []string
+}
+
+const lsep = filepath.ListSeparator
+
+var splitlisttests = []SplitListTest{
+ {"", []string{}},
+ {string([]byte{'a', lsep, 'b'}), []string{"a", "b"}},
+ {string([]byte{lsep, 'a', lsep, 'b'}), []string{"", "a", "b"}},
+}
+
+func TestSplitList(t *testing.T) {
+ for _, test := range splitlisttests {
+ if l := filepath.SplitList(test.list); !reflect.DeepEqual(l, test.result) {
+ t.Errorf("SplitList(%q) = %s, want %s", test.list, l, test.result)
+ }
+ }
+}
+
+type SplitTest struct {
+ path, dir, file string
+}
+
+var unixsplittests = []SplitTest{
+ {"a/b", "a/", "b"},
+ {"a/b/", "a/b/", ""},
+ {"a/", "a/", ""},
+ {"a", "", "a"},
+ {"/", "/", ""},
+}
+
+func TestSplit(t *testing.T) {
+ var splittests []SplitTest
+ splittests = unixsplittests
+ for _, test := range splittests {
+ if d, f := filepath.Split(test.path); d != test.dir || f != test.file {
+ t.Errorf("Split(%q) = %q, %q, want %q, %q", test.path, d, f, test.dir, test.file)
+ }
+ }
+}
+
+type JoinTest struct {
+ elem []string
+ path string
+}
+
+var jointests = []JoinTest{
+ // zero parameters
+ {[]string{}, ""},
+
+ // one parameter
+ {[]string{""}, ""},
+ {[]string{"a"}, "a"},
+
+ // two parameters
+ {[]string{"a", "b"}, "a/b"},
+ {[]string{"a", ""}, "a"},
+ {[]string{"", "b"}, "b"},
+ {[]string{"/", "a"}, "/a"},
+ {[]string{"/", ""}, "/"},
+ {[]string{"a/", "b"}, "a/b"},
+ {[]string{"a/", ""}, "a"},
+ {[]string{"", ""}, ""},
+}
+
+var winjointests = []JoinTest{
+ {[]string{`directory`, `file`}, `directory\file`},
+ {[]string{`C:\Windows\`, `System32`}, `C:\Windows\System32`},
+ {[]string{`C:\Windows\`, ``}, `C:\Windows`},
+ {[]string{`C:\`, `Windows`}, `C:\Windows`},
+ {[]string{`C:`, `Windows`}, `C:\Windows`},
+}
+
+// join takes a []string and passes it to Join.
+func join(elem []string, args ...string) string {
+ args = elem
+ return filepath.Join(args...)
+}
+
+func TestJoin(t *testing.T) {
+ if runtime.GOOS == "windows" {
+ jointests = append(jointests, winjointests...)
+ }
+ for _, test := range jointests {
+ if p := join(test.elem); p != filepath.FromSlash(test.path) {
+ t.Errorf("join(%q) = %q, want %q", test.elem, p, test.path)
+ }
+ }
+}
+
+type ExtTest struct {
+ path, ext string
+}
+
+var exttests = []ExtTest{
+ {"path.go", ".go"},
+ {"path.pb.go", ".go"},
+ {"a.dir/b", ""},
+ {"a.dir/b.go", ".go"},
+ {"a.dir/", ""},
+}
+
+func TestExt(t *testing.T) {
+ for _, test := range exttests {
+ if x := filepath.Ext(test.path); x != test.ext {
+ t.Errorf("Ext(%q) = %q, want %q", test.path, x, test.ext)
+ }
+ }
+}
+
+type Node struct {
+ name string
+ entries []*Node // nil if the entry is a file
+ mark int
+}
+
+var tree = &Node{
+ "testdata",
+ []*Node{
+ &Node{"a", nil, 0},
+ &Node{"b", []*Node{}, 0},
+ &Node{"c", nil, 0},
+ &Node{
+ "d",
+ []*Node{
+ &Node{"x", nil, 0},
+ &Node{"y", []*Node{}, 0},
+ &Node{
+ "z",
+ []*Node{
+ &Node{"u", nil, 0},
+ &Node{"v", nil, 0},
+ },
+ 0,
+ },
+ },
+ 0,
+ },
+ },
+ 0,
+}
+
+func walkTree(n *Node, path string, f func(path string, n *Node)) {
+ f(path, n)
+ for _, e := range n.entries {
+ walkTree(e, filepath.Join(path, e.name), f)
+ }
+}
+
+func makeTree(t *testing.T) {
+ walkTree(tree, tree.name, func(path string, n *Node) {
+ if n.entries == nil {
+ fd, err := os.Create(path)
+ if err != nil {
+ t.Errorf("makeTree: %v", err)
+ }
+ fd.Close()
+ } else {
+ os.Mkdir(path, 0770)
+ }
+ })
+}
+
+func markTree(n *Node) { walkTree(n, "", func(path string, n *Node) { n.mark++ }) }
+
+func checkMarks(t *testing.T) {
+ walkTree(tree, tree.name, func(path string, n *Node) {
+ if n.mark != 1 {
+ t.Errorf("node %s mark = %d; expected 1", path, n.mark)
+ }
+ n.mark = 0
+ })
+}
+
+// Assumes that each node name is unique. Good enough for a test.
+func mark(name string) {
+ name = filepath.ToSlash(name)
+ walkTree(tree, tree.name, func(path string, n *Node) {
+ if n.name == name {
+ n.mark++
+ }
+ })
+}
+
+type TestVisitor struct{}
+
+func (v *TestVisitor) VisitDir(path string, f *os.FileInfo) bool {
+ mark(f.Name)
+ return true
+}
+
+func (v *TestVisitor) VisitFile(path string, f *os.FileInfo) {
+ mark(f.Name)
+}
+
+func TestWalk(t *testing.T) {
+ makeTree(t)
+
+ // 1) ignore error handling, expect none
+ v := &TestVisitor{}
+ filepath.Walk(tree.name, v, nil)
+ checkMarks(t)
+
+ // 2) handle errors, expect none
+ errors := make(chan os.Error, 64)
+ filepath.Walk(tree.name, v, errors)
+ select {
+ case err := <-errors:
+ t.Errorf("no error expected, found: %s", err)
+ default:
+ // ok
+ }
+ checkMarks(t)
+
+ // Test permission errors. Only possible if we're not root
+ // and only on some file systems (AFS, FAT). To avoid errors during
+ // all.bash on those file systems, skip during gotest -short.
+ if os.Getuid() > 0 && !testing.Short() {
+ // introduce 2 errors: chmod top-level directories to 0
+ os.Chmod(filepath.Join(tree.name, tree.entries[1].name), 0)
+ os.Chmod(filepath.Join(tree.name, tree.entries[3].name), 0)
+ // mark respective subtrees manually
+ markTree(tree.entries[1])
+ markTree(tree.entries[3])
+ // correct double-marking of directory itself
+ tree.entries[1].mark--
+ tree.entries[3].mark--
+
+ // 3) handle errors, expect two
+ errors = make(chan os.Error, 64)
+ os.Chmod(filepath.Join(tree.name, tree.entries[1].name), 0)
+ filepath.Walk(tree.name, v, errors)
+ Loop:
+ for i := 1; i <= 2; i++ {
+ select {
+ case <-errors:
+ // ok
+ default:
+ t.Errorf("%d. error expected, none found", i)
+ break Loop
+ }
+ }
+ select {
+ case err := <-errors:
+ t.Errorf("only two errors expected, found 3rd: %v", err)
+ default:
+ // ok
+ }
+ // the inaccessible subtrees were marked manually
+ checkMarks(t)
+ }
+
+ // cleanup
+ os.Chmod(filepath.Join(tree.name, tree.entries[1].name), 0770)
+ os.Chmod(filepath.Join(tree.name, tree.entries[3].name), 0770)
+ if err := os.RemoveAll(tree.name); err != nil {
+ t.Errorf("removeTree: %v", err)
+ }
+}
+
+var basetests = []PathTest{
+ {"", "."},
+ {".", "."},
+ {"/.", "."},
+ {"/", "/"},
+ {"////", "/"},
+ {"x/", "x"},
+ {"abc", "abc"},
+ {"abc/def", "def"},
+ {"a/b/.x", ".x"},
+ {"a/b/c.", "c."},
+ {"a/b/c.x", "c.x"},
+}
+
+func TestBase(t *testing.T) {
+ for _, test := range basetests {
+ if s := filepath.ToSlash(filepath.Base(test.path)); s != test.result {
+ t.Errorf("Base(%q) = %q, want %q", test.path, s, test.result)
+ }
+ }
+}
+
+type IsAbsTest struct {
+ path string
+ isAbs bool
+}
+
+var isabstests = []IsAbsTest{
+ {"", false},
+ {"/", true},
+ {"/usr/bin/gcc", true},
+ {"..", false},
+ {"/a/../bb", true},
+ {".", false},
+ {"./", false},
+ {"lala", false},
+}
+
+var winisabstests = []IsAbsTest{
+ {`C:\`, true},
+ {`c\`, false},
+ {`c::`, false},
+ {`c:`, false},
+ {`/`, false},
+ {`\`, false},
+ {`\Windows`, false},
+ {`c:a\b`, false},
+}
+
+func TestIsAbs(t *testing.T) {
+ var tests []IsAbsTest
+ if runtime.GOOS == "windows" {
+ tests = append(tests, winisabstests...)
+ // All non-windows tests should fail, because they have no volume letter.
+ for _, test := range isabstests {
+ tests = append(tests, IsAbsTest{test.path, false})
+ }
+ // All non-windows test should work as intended if prefixed with volume letter.
+ for _, test := range isabstests {
+ tests = append(tests, IsAbsTest{"c:" + test.path, test.isAbs})
+ }
+ } else {
+ tests = isabstests
+ }
+
+ for _, test := range tests {
+ if r := filepath.IsAbs(test.path); r != test.isAbs {
+ t.Errorf("IsAbs(%q) = %v, want %v", test.path, r, test.isAbs)
+ }
+ }
+}
+
+type EvalSymlinksTest struct {
+ path, dest string
+}
+
+var EvalSymlinksTestDirs = []EvalSymlinksTest{
+ {"test", ""},
+ {"test/dir", ""},
+ {"test/dir/link3", "../../"},
+ {"test/link1", "../test"},
+ {"test/link2", "dir"},
+}
+
+var EvalSymlinksTests = []EvalSymlinksTest{
+ {"test", "test"},
+ {"test/dir", "test/dir"},
+ {"test/dir/../..", "."},
+ {"test/link1", "test"},
+ {"test/link2", "test/dir"},
+ {"test/link1/dir", "test/dir"},
+ {"test/link2/..", "test"},
+ {"test/dir/link3", "."},
+ {"test/link2/link3/test", "test"},
+}
+
+var EvalSymlinksAbsWindowsTests = []EvalSymlinksTest{
+ {`c:\`, `c:\`},
+}
+
+func testEvalSymlinks(t *testing.T, tests []EvalSymlinksTest) {
+ for _, d := range tests {
+ if p, err := filepath.EvalSymlinks(d.path); err != nil {
+ t.Errorf("EvalSymlinks(%q) error: %v", d.path, err)
+ } else if filepath.Clean(p) != filepath.Clean(d.dest) {
+ t.Errorf("EvalSymlinks(%q)=%q, want %q", d.path, p, d.dest)
+ }
+ }
+}
+
+func TestEvalSymlinks(t *testing.T) {
+ defer os.RemoveAll("test")
+ for _, d := range EvalSymlinksTestDirs {
+ var err os.Error
+ if d.dest == "" {
+ err = os.Mkdir(d.path, 0755)
+ } else {
+ if runtime.GOOS != "windows" {
+ err = os.Symlink(d.dest, d.path)
+ }
+ }
+ if err != nil {
+ t.Fatal(err)
+ }
+ }
+ var tests []EvalSymlinksTest
+ if runtime.GOOS == "windows" {
+ for _, d := range EvalSymlinksTests {
+ if d.path == d.dest {
+ // will test only real files and directories
+ tests = append(tests, d)
+ }
+ }
+ } else {
+ tests = EvalSymlinksTests
+ }
+ // relative
+ testEvalSymlinks(t, tests)
+ // absolute
+ goroot, err := filepath.EvalSymlinks(os.Getenv("GOROOT"))
+ if err != nil {
+ t.Fatalf("EvalSymlinks(%q) error: %v", os.Getenv("GOROOT"), err)
+ }
+ testroot := filepath.Join(goroot, "src", "pkg", "path", "filepath")
+ for i, d := range tests {
+ tests[i].path = filepath.Join(testroot, d.path)
+ tests[i].dest = filepath.Join(testroot, d.dest)
+ }
+ if runtime.GOOS == "windows" {
+ for _, d := range EvalSymlinksAbsWindowsTests {
+ tests = append(tests, d)
+ }
+ }
+ testEvalSymlinks(t, tests)
+}
+
+// Test paths relative to $GOROOT/src
+var abstests = []string{
+ "../AUTHORS",
+ "pkg/../../AUTHORS",
+ "Make.pkg",
+ "pkg/Makefile",
+
+ // Already absolute
+ "$GOROOT/src/Make.pkg",
+ "$GOROOT/src/../src/Make.pkg",
+}
+
+func TestAbs(t *testing.T) {
+ oldwd, err := os.Getwd()
+ if err != nil {
+ t.Fatal("Getwd failed: " + err.String())
+ }
+ defer os.Chdir(oldwd)
+ goroot := os.Getenv("GOROOT")
+ cwd := filepath.Join(goroot, "src")
+ os.Chdir(cwd)
+ for _, path := range abstests {
+ path = strings.Replace(path, "$GOROOT", goroot, -1)
+ abspath, err := filepath.Abs(path)
+ if err != nil {
+ t.Errorf("Abs(%q) error: %v", path, err)
+ }
+ info, err := os.Stat(path)
+ if err != nil {
+ t.Errorf("%s: %s", path, err)
+ }
+ absinfo, err := os.Stat(abspath)
+ if err != nil || absinfo.Ino != info.Ino {
+ t.Errorf("Abs(%q)=%q, not the same file", path, abspath)
+ }
+ if !filepath.IsAbs(abspath) {
+ t.Errorf("Abs(%q)=%q, not an absolute path", path, abspath)
+ }
+ if filepath.IsAbs(path) && abspath != filepath.Clean(path) {
+ t.Errorf("Abs(%q)=%q, isn't clean", path, abspath)
+ }
+ }
+}
diff --git a/src/pkg/path/filepath/path_unix.go b/src/pkg/path/filepath/path_unix.go
new file mode 100644
index 000000000..b2a4151c1
--- /dev/null
+++ b/src/pkg/path/filepath/path_unix.go
@@ -0,0 +1,23 @@
+// Copyright 2010 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 filepath
+
+import "strings"
+
+// IsAbs returns true if the path is absolute.
+func IsAbs(path string) bool {
+ return strings.HasPrefix(path, "/")
+}
+
+// VolumeName returns the leading volume name on Windows.
+// It returns "" elsewhere.
+func VolumeName(path string) string {
+ return ""
+}
+
+// HasPrefix tests whether the path p begins with prefix.
+func HasPrefix(p, prefix string) bool {
+ return strings.HasPrefix(p, prefix)
+}
diff --git a/src/pkg/path/filepath/path_windows.go b/src/pkg/path/filepath/path_windows.go
new file mode 100644
index 000000000..2535697fd
--- /dev/null
+++ b/src/pkg/path/filepath/path_windows.go
@@ -0,0 +1,46 @@
+// Copyright 2010 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 filepath
+
+import "strings"
+
+// IsAbs returns true if the path is absolute.
+func IsAbs(path string) (b bool) {
+ v := VolumeName(path)
+ if v == "" {
+ return false
+ }
+ path = path[len(v):]
+ if path == "" {
+ return false
+ }
+ return path[0] == '/' || path[0] == '\\'
+}
+
+// VolumeName returns leading volume name.
+// Given "C:\foo\bar" it returns "C:" under windows.
+// On other platforms it returns "".
+func VolumeName(path string) (v string) {
+ if len(path) < 2 {
+ return ""
+ }
+ // with drive letter
+ c := path[0]
+ if path[1] == ':' &&
+ ('0' <= c && c <= '9' || 'a' <= c && c <= 'z' ||
+ 'A' <= c && c <= 'Z') {
+ return path[:2]
+ }
+ return ""
+}
+
+// HasPrefix tests whether the path p begins with prefix.
+// It ignores case while comparing.
+func HasPrefix(p, prefix string) bool {
+ if strings.HasPrefix(p, prefix) {
+ return true
+ }
+ return strings.HasPrefix(strings.ToLower(p), strings.ToLower(prefix))
+}
generated by cgit v1.2.3 (git 2.39.1) at 2025-07-24 07:34:14 +0000