diff options
Diffstat (limited to 'vendor/golang.org/x/tools/internal')
10 files changed, 0 insertions, 1607 deletions
diff --git a/vendor/golang.org/x/tools/internal/fastwalk/fastwalk.go b/vendor/golang.org/x/tools/internal/fastwalk/fastwalk.go deleted file mode 100644 index 7219c8e9..00000000 --- a/vendor/golang.org/x/tools/internal/fastwalk/fastwalk.go +++ /dev/null @@ -1,196 +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 fastwalk provides a faster version of filepath.Walk for file system -// scanning tools. -package fastwalk - -import ( - "errors" - "os" - "path/filepath" - "runtime" - "sync" -) - -// TraverseLink is used as a return value from WalkFuncs to indicate that the -// symlink named in the call may be traversed. -var TraverseLink = errors.New("fastwalk: traverse symlink, assuming target is a directory") - -// SkipFiles is a used as a return value from WalkFuncs to indicate that the -// callback should not be called for any other files in the current directory. -// Child directories will still be traversed. -var SkipFiles = errors.New("fastwalk: skip remaining files in directory") - -// Walk is a faster implementation of filepath.Walk. -// -// filepath.Walk's design necessarily calls os.Lstat on each file, -// even if the caller needs less info. -// Many tools need only the type of each file. -// On some platforms, this information is provided directly by the readdir -// system call, avoiding the need to stat each file individually. -// fastwalk_unix.go contains a fork of the syscall routines. -// -// See golang.org/issue/16399 -// -// Walk walks the file tree rooted at root, calling walkFn for -// each file or directory in the tree, including root. -// -// If fastWalk returns filepath.SkipDir, the directory is skipped. -// -// Unlike filepath.Walk: -// * file stat calls must be done by the user. -// The only provided metadata is the file type, which does not include -// any permission bits. -// * multiple goroutines stat the filesystem concurrently. The provided -// walkFn must be safe for concurrent use. -// * fastWalk can follow symlinks if walkFn returns the TraverseLink -// sentinel error. It is the walkFn's responsibility to prevent -// fastWalk from going into symlink cycles. -func Walk(root string, walkFn func(path string, typ os.FileMode) error) error { - // TODO(bradfitz): make numWorkers configurable? We used a - // minimum of 4 to give the kernel more info about multiple - // things we want, in hopes its I/O scheduling can take - // advantage of that. Hopefully most are in cache. Maybe 4 is - // even too low of a minimum. Profile more. - numWorkers := 4 - if n := runtime.NumCPU(); n > numWorkers { - numWorkers = n - } - - // Make sure to wait for all workers to finish, otherwise - // walkFn could still be called after returning. This Wait call - // runs after close(e.donec) below. - var wg sync.WaitGroup - defer wg.Wait() - - w := &walker{ - fn: walkFn, - enqueuec: make(chan walkItem, numWorkers), // buffered for performance - workc: make(chan walkItem, numWorkers), // buffered for performance - donec: make(chan struct{}), - - // buffered for correctness & not leaking goroutines: - resc: make(chan error, numWorkers), - } - defer close(w.donec) - - for i := 0; i < numWorkers; i++ { - wg.Add(1) - go w.doWork(&wg) - } - todo := []walkItem{{dir: root}} - out := 0 - for { - workc := w.workc - var workItem walkItem - if len(todo) == 0 { - workc = nil - } else { - workItem = todo[len(todo)-1] - } - select { - case workc <- workItem: - todo = todo[:len(todo)-1] - out++ - case it := <-w.enqueuec: - todo = append(todo, it) - case err := <-w.resc: - out-- - if err != nil { - return err - } - if out == 0 && len(todo) == 0 { - // It's safe to quit here, as long as the buffered - // enqueue channel isn't also readable, which might - // happen if the worker sends both another unit of - // work and its result before the other select was - // scheduled and both w.resc and w.enqueuec were - // readable. - select { - case it := <-w.enqueuec: - todo = append(todo, it) - default: - return nil - } - } - } - } -} - -// doWork reads directories as instructed (via workc) and runs the -// user's callback function. -func (w *walker) doWork(wg *sync.WaitGroup) { - defer wg.Done() - for { - select { - case <-w.donec: - return - case it := <-w.workc: - select { - case <-w.donec: - return - case w.resc <- w.walk(it.dir, !it.callbackDone): - } - } - } -} - -type walker struct { - fn func(path string, typ os.FileMode) error - - donec chan struct{} // closed on fastWalk's return - workc chan walkItem // to workers - enqueuec chan walkItem // from workers - resc chan error // from workers -} - -type walkItem struct { - dir string - callbackDone bool // callback already called; don't do it again -} - -func (w *walker) enqueue(it walkItem) { - select { - case w.enqueuec <- it: - case <-w.donec: - } -} - -func (w *walker) onDirEnt(dirName, baseName string, typ os.FileMode) error { - joined := dirName + string(os.PathSeparator) + baseName - if typ == os.ModeDir { - w.enqueue(walkItem{dir: joined}) - return nil - } - - err := w.fn(joined, typ) - if typ == os.ModeSymlink { - if err == TraverseLink { - // Set callbackDone so we don't call it twice for both the - // symlink-as-symlink and the symlink-as-directory later: - w.enqueue(walkItem{dir: joined, callbackDone: true}) - return nil - } - if err == filepath.SkipDir { - // Permit SkipDir on symlinks too. - return nil - } - } - return err -} - -func (w *walker) walk(root string, runUserCallback bool) error { - if runUserCallback { - err := w.fn(root, os.ModeDir) - if err == filepath.SkipDir { - return nil - } - if err != nil { - return err - } - } - - return readDir(root, w.onDirEnt) -} diff --git a/vendor/golang.org/x/tools/internal/fastwalk/fastwalk_dirent_fileno.go b/vendor/golang.org/x/tools/internal/fastwalk/fastwalk_dirent_fileno.go deleted file mode 100644 index ccffec5a..00000000 --- a/vendor/golang.org/x/tools/internal/fastwalk/fastwalk_dirent_fileno.go +++ /dev/null @@ -1,13 +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. - -// +build freebsd openbsd netbsd - -package fastwalk - -import "syscall" - -func direntInode(dirent *syscall.Dirent) uint64 { - return uint64(dirent.Fileno) -} diff --git a/vendor/golang.org/x/tools/internal/fastwalk/fastwalk_dirent_ino.go b/vendor/golang.org/x/tools/internal/fastwalk/fastwalk_dirent_ino.go deleted file mode 100644 index ab7fbc0a..00000000 --- a/vendor/golang.org/x/tools/internal/fastwalk/fastwalk_dirent_ino.go +++ /dev/null @@ -1,14 +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. - -// +build linux darwin -// +build !appengine - -package fastwalk - -import "syscall" - -func direntInode(dirent *syscall.Dirent) uint64 { - return uint64(dirent.Ino) -} diff --git a/vendor/golang.org/x/tools/internal/fastwalk/fastwalk_dirent_namlen_bsd.go b/vendor/golang.org/x/tools/internal/fastwalk/fastwalk_dirent_namlen_bsd.go deleted file mode 100644 index a3b26a7b..00000000 --- a/vendor/golang.org/x/tools/internal/fastwalk/fastwalk_dirent_namlen_bsd.go +++ /dev/null @@ -1,13 +0,0 @@ -// Copyright 2018 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. - -// +build darwin freebsd openbsd netbsd - -package fastwalk - -import "syscall" - -func direntNamlen(dirent *syscall.Dirent) uint64 { - return uint64(dirent.Namlen) -} diff --git a/vendor/golang.org/x/tools/internal/fastwalk/fastwalk_dirent_namlen_linux.go b/vendor/golang.org/x/tools/internal/fastwalk/fastwalk_dirent_namlen_linux.go deleted file mode 100644 index e880d358..00000000 --- a/vendor/golang.org/x/tools/internal/fastwalk/fastwalk_dirent_namlen_linux.go +++ /dev/null @@ -1,29 +0,0 @@ -// Copyright 2018 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. - -// +build linux -// +build !appengine - -package fastwalk - -import ( - "bytes" - "syscall" - "unsafe" -) - -func direntNamlen(dirent *syscall.Dirent) uint64 { - const fixedHdr = uint16(unsafe.Offsetof(syscall.Dirent{}.Name)) - nameBuf := (*[unsafe.Sizeof(dirent.Name)]byte)(unsafe.Pointer(&dirent.Name[0])) - const nameBufLen = uint16(len(nameBuf)) - limit := dirent.Reclen - fixedHdr - if limit > nameBufLen { - limit = nameBufLen - } - nameLen := bytes.IndexByte(nameBuf[:limit], 0) - if nameLen < 0 { - panic("failed to find terminating 0 byte in dirent") - } - return uint64(nameLen) -} diff --git a/vendor/golang.org/x/tools/internal/fastwalk/fastwalk_portable.go b/vendor/golang.org/x/tools/internal/fastwalk/fastwalk_portable.go deleted file mode 100644 index a906b875..00000000 --- a/vendor/golang.org/x/tools/internal/fastwalk/fastwalk_portable.go +++ /dev/null @@ -1,37 +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. - -// +build appengine !linux,!darwin,!freebsd,!openbsd,!netbsd - -package fastwalk - -import ( - "io/ioutil" - "os" -) - -// readDir calls fn for each directory entry in dirName. -// It does not descend into directories or follow symlinks. -// If fn returns a non-nil error, readDir returns with that error -// immediately. -func readDir(dirName string, fn func(dirName, entName string, typ os.FileMode) error) error { - fis, err := ioutil.ReadDir(dirName) - if err != nil { - return err - } - skipFiles := false - for _, fi := range fis { - if fi.Mode().IsRegular() && skipFiles { - continue - } - if err := fn(dirName, fi.Name(), fi.Mode()&os.ModeType); err != nil { - if err == SkipFiles { - skipFiles = true - continue - } - return err - } - } - return nil -} diff --git a/vendor/golang.org/x/tools/internal/fastwalk/fastwalk_unix.go b/vendor/golang.org/x/tools/internal/fastwalk/fastwalk_unix.go deleted file mode 100644 index 3369b1a0..00000000 --- a/vendor/golang.org/x/tools/internal/fastwalk/fastwalk_unix.go +++ /dev/null @@ -1,127 +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. - -// +build linux darwin freebsd openbsd netbsd -// +build !appengine - -package fastwalk - -import ( - "fmt" - "os" - "syscall" - "unsafe" -) - -const blockSize = 8 << 10 - -// unknownFileMode is a sentinel (and bogus) os.FileMode -// value used to represent a syscall.DT_UNKNOWN Dirent.Type. -const unknownFileMode os.FileMode = os.ModeNamedPipe | os.ModeSocket | os.ModeDevice - -func readDir(dirName string, fn func(dirName, entName string, typ os.FileMode) error) error { - fd, err := syscall.Open(dirName, 0, 0) - if err != nil { - return &os.PathError{Op: "open", Path: dirName, Err: err} - } - defer syscall.Close(fd) - - // The buffer must be at least a block long. - buf := make([]byte, blockSize) // stack-allocated; doesn't escape - bufp := 0 // starting read position in buf - nbuf := 0 // end valid data in buf - skipFiles := false - for { - if bufp >= nbuf { - bufp = 0 - nbuf, err = syscall.ReadDirent(fd, buf) - if err != nil { - return os.NewSyscallError("readdirent", err) - } - if nbuf <= 0 { - return nil - } - } - consumed, name, typ := parseDirEnt(buf[bufp:nbuf]) - bufp += consumed - if name == "" || name == "." || name == ".." { - continue - } - // Fallback for filesystems (like old XFS) that don't - // support Dirent.Type and have DT_UNKNOWN (0) there - // instead. - if typ == unknownFileMode { - fi, err := os.Lstat(dirName + "/" + name) - if err != nil { - // It got deleted in the meantime. - if os.IsNotExist(err) { - continue - } - return err - } - typ = fi.Mode() & os.ModeType - } - if skipFiles && typ.IsRegular() { - continue - } - if err := fn(dirName, name, typ); err != nil { - if err == SkipFiles { - skipFiles = true - continue - } - return err - } - } -} - -func parseDirEnt(buf []byte) (consumed int, name string, typ os.FileMode) { - // golang.org/issue/15653 - dirent := (*syscall.Dirent)(unsafe.Pointer(&buf[0])) - if v := unsafe.Offsetof(dirent.Reclen) + unsafe.Sizeof(dirent.Reclen); uintptr(len(buf)) < v { - panic(fmt.Sprintf("buf size of %d smaller than dirent header size %d", len(buf), v)) - } - if len(buf) < int(dirent.Reclen) { - panic(fmt.Sprintf("buf size %d < record length %d", len(buf), dirent.Reclen)) - } - consumed = int(dirent.Reclen) - if direntInode(dirent) == 0 { // File absent in directory. - return - } - switch dirent.Type { - case syscall.DT_REG: - typ = 0 - case syscall.DT_DIR: - typ = os.ModeDir - case syscall.DT_LNK: - typ = os.ModeSymlink - case syscall.DT_BLK: - typ = os.ModeDevice - case syscall.DT_FIFO: - typ = os.ModeNamedPipe - case syscall.DT_SOCK: - typ = os.ModeSocket - case syscall.DT_UNKNOWN: - typ = unknownFileMode - default: - // Skip weird things. - // It's probably a DT_WHT (http://lwn.net/Articles/325369/) - // or something. Revisit if/when this package is moved outside - // of goimports. goimports only cares about regular files, - // symlinks, and directories. - return - } - - nameBuf := (*[unsafe.Sizeof(dirent.Name)]byte)(unsafe.Pointer(&dirent.Name[0])) - nameLen := direntNamlen(dirent) - - // Special cases for common things: - if nameLen == 1 && nameBuf[0] == '.' { - name = "." - } else if nameLen == 2 && nameBuf[0] == '.' && nameBuf[1] == '.' { - name = ".." - } else { - name = string(nameBuf[:nameLen]) - } - return -} diff --git a/vendor/golang.org/x/tools/internal/gopathwalk/walk.go b/vendor/golang.org/x/tools/internal/gopathwalk/walk.go deleted file mode 100644 index 04bb96a3..00000000 --- a/vendor/golang.org/x/tools/internal/gopathwalk/walk.go +++ /dev/null @@ -1,250 +0,0 @@ -// Copyright 2018 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 gopathwalk is like filepath.Walk but specialized for finding Go -// packages, particularly in $GOPATH and $GOROOT. -package gopathwalk - -import ( - "bufio" - "bytes" - "fmt" - "go/build" - "io/ioutil" - "log" - "os" - "path/filepath" - "strings" - - "golang.org/x/tools/internal/fastwalk" -) - -// Options controls the behavior of a Walk call. -type Options struct { - Debug bool // Enable debug logging - ModulesEnabled bool // Search module caches. Also disables legacy goimports ignore rules. -} - -// RootType indicates the type of a Root. -type RootType int - -const ( - RootUnknown RootType = iota - RootGOROOT - RootGOPATH - RootCurrentModule - RootModuleCache - RootOther -) - -// A Root is a starting point for a Walk. -type Root struct { - Path string - Type RootType -} - -// SrcDirsRoots returns the roots from build.Default.SrcDirs(). Not modules-compatible. -func SrcDirsRoots(ctx *build.Context) []Root { - var roots []Root - roots = append(roots, Root{filepath.Join(ctx.GOROOT, "src"), RootGOROOT}) - for _, p := range filepath.SplitList(ctx.GOPATH) { - roots = append(roots, Root{filepath.Join(p, "src"), RootGOPATH}) - } - return roots -} - -// Walk walks Go source directories ($GOROOT, $GOPATH, etc) to find packages. -// For each package found, add will be called (concurrently) with the absolute -// paths of the containing source directory and the package directory. -// add will be called concurrently. -func Walk(roots []Root, add func(root Root, dir string), opts Options) { - for _, root := range roots { - walkDir(root, add, opts) - } -} - -func walkDir(root Root, add func(Root, string), opts Options) { - if _, err := os.Stat(root.Path); os.IsNotExist(err) { - if opts.Debug { - log.Printf("skipping nonexistant directory: %v", root.Path) - } - return - } - if opts.Debug { - log.Printf("scanning %s", root.Path) - } - w := &walker{ - root: root, - add: add, - opts: opts, - } - w.init() - if err := fastwalk.Walk(root.Path, w.walk); err != nil { - log.Printf("gopathwalk: scanning directory %v: %v", root.Path, err) - } - - if opts.Debug { - log.Printf("scanned %s", root.Path) - } -} - -// walker is the callback for fastwalk.Walk. -type walker struct { - root Root // The source directory to scan. - add func(Root, string) // The callback that will be invoked for every possible Go package dir. - opts Options // Options passed to Walk by the user. - - ignoredDirs []os.FileInfo // The ignored directories, loaded from .goimportsignore files. -} - -// init initializes the walker based on its Options. -func (w *walker) init() { - var ignoredPaths []string - if w.root.Type == RootModuleCache { - ignoredPaths = []string{"cache"} - } - if !w.opts.ModulesEnabled && w.root.Type == RootGOPATH { - ignoredPaths = w.getIgnoredDirs(w.root.Path) - ignoredPaths = append(ignoredPaths, "v", "mod") - } - - for _, p := range ignoredPaths { - full := filepath.Join(w.root.Path, p) - if fi, err := os.Stat(full); err == nil { - w.ignoredDirs = append(w.ignoredDirs, fi) - if w.opts.Debug { - log.Printf("Directory added to ignore list: %s", full) - } - } else if w.opts.Debug { - log.Printf("Error statting ignored directory: %v", err) - } - } -} - -// getIgnoredDirs reads an optional config file at <path>/.goimportsignore -// of relative directories to ignore when scanning for go files. -// The provided path is one of the $GOPATH entries with "src" appended. -func (w *walker) getIgnoredDirs(path string) []string { - file := filepath.Join(path, ".goimportsignore") - slurp, err := ioutil.ReadFile(file) - if w.opts.Debug { - if err != nil { - log.Print(err) - } else { - log.Printf("Read %s", file) - } - } - if err != nil { - return nil - } - - var ignoredDirs []string - bs := bufio.NewScanner(bytes.NewReader(slurp)) - for bs.Scan() { - line := strings.TrimSpace(bs.Text()) - if line == "" || strings.HasPrefix(line, "#") { - continue - } - ignoredDirs = append(ignoredDirs, line) - } - return ignoredDirs -} - -func (w *walker) shouldSkipDir(fi os.FileInfo) bool { - for _, ignoredDir := range w.ignoredDirs { - if os.SameFile(fi, ignoredDir) { - return true - } - } - return false -} - -func (w *walker) walk(path string, typ os.FileMode) error { - dir := filepath.Dir(path) - if typ.IsRegular() { - if dir == w.root.Path && (w.root.Type == RootGOROOT || w.root.Type == RootGOPATH) { - // Doesn't make sense to have regular files - // directly in your $GOPATH/src or $GOROOT/src. - return fastwalk.SkipFiles - } - if !strings.HasSuffix(path, ".go") { - return nil - } - - w.add(w.root, dir) - return fastwalk.SkipFiles - } - if typ == os.ModeDir { - base := filepath.Base(path) - if base == "" || base[0] == '.' || base[0] == '_' || - base == "testdata" || - (w.root.Type == RootGOROOT && w.opts.ModulesEnabled && base == "vendor") || - (!w.opts.ModulesEnabled && base == "node_modules") { - return filepath.SkipDir - } - fi, err := os.Lstat(path) - if err == nil && w.shouldSkipDir(fi) { - return filepath.SkipDir - } - return nil - } - if typ == os.ModeSymlink { - base := filepath.Base(path) - if strings.HasPrefix(base, ".#") { - // Emacs noise. - return nil - } - fi, err := os.Lstat(path) - if err != nil { - // Just ignore it. - return nil - } - if w.shouldTraverse(dir, fi) { - return fastwalk.TraverseLink - } - } - return nil -} - -// shouldTraverse reports whether the symlink fi, found in dir, -// should be followed. It makes sure symlinks were never visited -// before to avoid symlink loops. -func (w *walker) shouldTraverse(dir string, fi os.FileInfo) bool { - path := filepath.Join(dir, fi.Name()) - target, err := filepath.EvalSymlinks(path) - if err != nil { - return false - } - ts, err := os.Stat(target) - if err != nil { - fmt.Fprintln(os.Stderr, err) - return false - } - if !ts.IsDir() { - return false - } - if w.shouldSkipDir(ts) { - return false - } - // Check for symlink loops by statting each directory component - // and seeing if any are the same file as ts. - for { - parent := filepath.Dir(path) - if parent == path { - // Made it to the root without seeing a cycle. - // Use this symlink. - return true - } - parentInfo, err := os.Stat(parent) - if err != nil { - return false - } - if os.SameFile(ts, parentInfo) { - // Cycle. Don't traverse. - return false - } - path = parent - } - -} diff --git a/vendor/golang.org/x/tools/internal/module/module.go b/vendor/golang.org/x/tools/internal/module/module.go deleted file mode 100644 index 9a4edb9d..00000000 --- a/vendor/golang.org/x/tools/internal/module/module.go +++ /dev/null @@ -1,540 +0,0 @@ -// Copyright 2018 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 module defines the module.Version type -// along with support code. -package module - -// IMPORTANT NOTE -// -// This file essentially defines the set of valid import paths for the go command. -// There are many subtle considerations, including Unicode ambiguity, -// security, network, and file system representations. -// -// This file also defines the set of valid module path and version combinations, -// another topic with many subtle considerations. -// -// Changes to the semantics in this file require approval from rsc. - -import ( - "fmt" - "sort" - "strings" - "unicode" - "unicode/utf8" - - "golang.org/x/tools/internal/semver" -) - -// A Version is defined by a module path and version pair. -type Version struct { - Path string - - // Version is usually a semantic version in canonical form. - // There are two exceptions to this general rule. - // First, the top-level target of a build has no specific version - // and uses Version = "". - // Second, during MVS calculations the version "none" is used - // to represent the decision to take no version of a given module. - Version string `json:",omitempty"` -} - -// Check checks that a given module path, version pair is valid. -// In addition to the path being a valid module path -// and the version being a valid semantic version, -// the two must correspond. -// For example, the path "yaml/v2" only corresponds to -// semantic versions beginning with "v2.". -func Check(path, version string) error { - if err := CheckPath(path); err != nil { - return err - } - if !semver.IsValid(version) { - return fmt.Errorf("malformed semantic version %v", version) - } - _, pathMajor, _ := SplitPathVersion(path) - if !MatchPathMajor(version, pathMajor) { - if pathMajor == "" { - pathMajor = "v0 or v1" - } - if pathMajor[0] == '.' { // .v1 - pathMajor = pathMajor[1:] - } - return fmt.Errorf("mismatched module path %v and version %v (want %v)", path, version, pathMajor) - } - return nil -} - -// firstPathOK reports whether r can appear in the first element of a module path. -// The first element of the path must be an LDH domain name, at least for now. -// To avoid case ambiguity, the domain name must be entirely lower case. -func firstPathOK(r rune) bool { - return r == '-' || r == '.' || - '0' <= r && r <= '9' || - 'a' <= r && r <= 'z' -} - -// pathOK reports whether r can appear in an import path element. -// Paths can be ASCII letters, ASCII digits, and limited ASCII punctuation: + - . _ and ~. -// This matches what "go get" has historically recognized in import paths. -// TODO(rsc): We would like to allow Unicode letters, but that requires additional -// care in the safe encoding (see note below). -func pathOK(r rune) bool { - if r < utf8.RuneSelf { - return r == '+' || r == '-' || r == '.' || r == '_' || r == '~' || - '0' <= r && r <= '9' || - 'A' <= r && r <= 'Z' || - 'a' <= r && r <= 'z' - } - return false -} - -// fileNameOK reports whether r can appear in a file name. -// For now we allow all Unicode letters but otherwise limit to pathOK plus a few more punctuation characters. -// If we expand the set of allowed characters here, we have to -// work harder at detecting potential case-folding and normalization collisions. -// See note about "safe encoding" below. -func fileNameOK(r rune) bool { - if r < utf8.RuneSelf { - // Entire set of ASCII punctuation, from which we remove characters: - // ! " # $ % & ' ( ) * + , - . / : ; < = > ? @ [ \ ] ^ _ ` { | } ~ - // We disallow some shell special characters: " ' * < > ? ` | - // (Note that some of those are disallowed by the Windows file system as well.) - // We also disallow path separators / : and \ (fileNameOK is only called on path element characters). - // We allow spaces (U+0020) in file names. - const allowed = "!#$%&()+,-.=@[]^_{}~ " - if '0' <= r && r <= '9' || 'A' <= r && r <= 'Z' || 'a' <= r && r <= 'z' { - return true - } - for i := 0; i < len(allowed); i++ { - if rune(allowed[i]) == r { - return true - } - } - return false - } - // It may be OK to add more ASCII punctuation here, but only carefully. - // For example Windows disallows < > \, and macOS disallows :, so we must not allow those. - return unicode.IsLetter(r) -} - -// CheckPath checks that a module path is valid. -func CheckPath(path string) error { - if err := checkPath(path, false); err != nil { - return fmt.Errorf("malformed module path %q: %v", path, err) - } - i := strings.Index(path, "/") - if i < 0 { - i = len(path) - } - if i == 0 { - return fmt.Errorf("malformed module path %q: leading slash", path) - } - if !strings.Contains(path[:i], ".") { - return fmt.Errorf("malformed module path %q: missing dot in first path element", path) - } - if path[0] == '-' { - return fmt.Errorf("malformed module path %q: leading dash in first path element", path) - } - for _, r := range path[:i] { - if !firstPathOK(r) { - return fmt.Errorf("malformed module path %q: invalid char %q in first path element", path, r) - } - } - if _, _, ok := SplitPathVersion(path); !ok { - return fmt.Errorf("malformed module path %q: invalid version", path) - } - return nil -} - -// CheckImportPath checks that an import path is valid. -func CheckImportPath(path string) error { - if err := checkPath(path, false); err != nil { - return fmt.Errorf("malformed import path %q: %v", path, err) - } - return nil -} - -// checkPath checks that a general path is valid. -// It returns an error describing why but not mentioning path. -// Because these checks apply to both module paths and import paths, -// the caller is expected to add the "malformed ___ path %q: " prefix. -// fileName indicates whether the final element of the path is a file name -// (as opposed to a directory name). -func checkPath(path string, fileName bool) error { - if !utf8.ValidString(path) { - return fmt.Errorf("invalid UTF-8") - } - if path == "" { - return fmt.Errorf("empty string") - } - if strings.Contains(path, "..") { - return fmt.Errorf("double dot") - } - if strings.Contains(path, "//") { - return fmt.Errorf("double slash") - } - if path[len(path)-1] == '/' { - return fmt.Errorf("trailing slash") - } - elemStart := 0 - for i, r := range path { - if r == '/' { - if err := checkElem(path[elemStart:i], fileName); err != nil { - return err - } - elemStart = i + 1 - } - } - if err := checkElem(path[elemStart:], fileName); err != nil { - return err - } - return nil -} - -// checkElem checks whether an individual path element is valid. -// fileName indicates whether the element is a file name (not a directory name). -func checkElem(elem string, fileName bool) error { - if elem == "" { - return fmt.Errorf("empty path element") - } - if strings.Count(elem, ".") == len(elem) { - return fmt.Errorf("invalid path element %q", elem) - } - if elem[0] == '.' && !fileName { - return fmt.Errorf("leading dot in path element") - } - if elem[len(elem)-1] == '.' { - return fmt.Errorf("trailing dot in path element") - } - charOK := pathOK - if fileName { - charOK = fileNameOK - } - for _, r := range elem { - if !charOK(r) { - return fmt.Errorf("invalid char %q", r) - } - } - - // Windows disallows a bunch of path elements, sadly. - // See https://docs.microsoft.com/en-us/windows/desktop/fileio/naming-a-file - short := elem - if i := strings.Index(short, "."); i >= 0 { - short = short[:i] - } - for _, bad := range badWindowsNames { - if strings.EqualFold(bad, short) { - return fmt.Errorf("disallowed path element %q", elem) - } - } - return nil -} - -// CheckFilePath checks whether a slash-separated file path is valid. -func CheckFilePath(path string) error { - if err := checkPath(path, true); err != nil { - return fmt.Errorf("malformed file path %q: %v", path, err) - } - return nil -} - -// badWindowsNames are the reserved file path elements on Windows. -// See https://docs.microsoft.com/en-us/windows/desktop/fileio/naming-a-file -var badWindowsNames = []string{ - "CON", - "PRN", - "AUX", - "NUL", - "COM1", - "COM2", - "COM3", - "COM4", - "COM5", - "COM6", - "COM7", - "COM8", - "COM9", - "LPT1", - "LPT2", - "LPT3", - "LPT4", - "LPT5", - "LPT6", - "LPT7", - "LPT8", - "LPT9", -} - -// SplitPathVersion returns prefix and major version such that prefix+pathMajor == path -// and version is either empty or "/vN" for N >= 2. -// As a special case, gopkg.in paths are recognized directly; -// they require ".vN" instead of "/vN", and for all N, not just N >= 2. -func SplitPathVersion(path string) (prefix, pathMajor string, ok bool) { - if strings.HasPrefix(path, "gopkg.in/") { - return splitGopkgIn(path) - } - - i := len(path) - dot := false - for i > 0 && ('0' <= path[i-1] && path[i-1] <= '9' || path[i-1] == '.') { - if path[i-1] == '.' { - dot = true - } - i-- - } - if i <= 1 || i == len(path) || path[i-1] != 'v' || path[i-2] != '/' { - return path, "", true - } - prefix, pathMajor = path[:i-2], path[i-2:] - if dot || len(pathMajor) <= 2 || pathMajor[2] == '0' || pathMajor == "/v1" { - return path, "", false - } - return prefix, pathMajor, true -} - -// splitGopkgIn is like SplitPathVersion but only for gopkg.in paths. -func splitGopkgIn(path string) (prefix, pathMajor string, ok bool) { - if !strings.HasPrefix(path, "gopkg.in/") { - return path, "", false - } - i := len(path) - if strings.HasSuffix(path, "-unstable") { - i -= len("-unstable") - } - for i > 0 && ('0' <= path[i-1] && path[i-1] <= '9') { - i-- - } - if i <= 1 || path[i-1] != 'v' || path[i-2] != '.' { - // All gopkg.in paths must end in vN for some N. - return path, "", false - } - prefix, pathMajor = path[:i-2], path[i-2:] - if len(pathMajor) <= 2 || pathMajor[2] == '0' && pathMajor != ".v0" { - return path, "", false - } - return prefix, pathMajor, true -} - -// MatchPathMajor reports whether the semantic version v -// matches the path major version pathMajor. -func MatchPathMajor(v, pathMajor string) bool { - if strings.HasPrefix(pathMajor, ".v") && strings.HasSuffix(pathMajor, "-unstable") { - pathMajor = strings.TrimSuffix(pathMajor, "-unstable") - } - if strings.HasPrefix(v, "v0.0.0-") && pathMajor == ".v1" { - // Allow old bug in pseudo-versions that generated v0.0.0- pseudoversion for gopkg .v1. - // For example, gopkg.in/yaml.v2@v2.2.1's go.mod requires gopkg.in/check.v1 v0.0.0-20161208181325-20d25e280405. - return true - } - m := semver.Major(v) - if pathMajor == "" { - return m == "v0" || m == "v1" || semver.Build(v) == "+incompatible" - } - return (pathMajor[0] == '/' || pathMajor[0] == '.') && m == pathMajor[1:] -} - -// CanonicalVersion returns the canonical form of the version string v. -// It is the same as semver.Canonical(v) except that it preserves the special build suffix "+incompatible". -func CanonicalVersion(v string) string { - cv := semver.Canonical(v) - if semver.Build(v) == "+incompatible" { - cv += "+incompatible" - } - return cv -} - -// Sort sorts the list by Path, breaking ties by comparing Versions. -func Sort(list []Version) { - sort.Slice(list, func(i, j int) bool { - mi := list[i] - mj := list[j] - if mi.Path != mj.Path { - return mi.Path < mj.Path - } - // To help go.sum formatting, allow version/file. - // Compare semver prefix by semver rules, - // file by string order. - vi := mi.Version - vj := mj.Version - var fi, fj string - if k := strings.Index(vi, "/"); k >= 0 { - vi, fi = vi[:k], vi[k:] - } - if k := strings.Index(vj, "/"); k >= 0 { - vj, fj = vj[:k], vj[k:] - } - if vi != vj { - return semver.Compare(vi, vj) < 0 - } - return fi < fj - }) -} - -// Safe encodings -// -// Module paths appear as substrings of file system paths -// (in the download cache) and of web server URLs in the proxy protocol. -// In general we cannot rely on file systems to be case-sensitive, -// nor can we rely on web servers, since they read from file systems. -// That is, we cannot rely on the file system to keep rsc.io/QUOTE -// and rsc.io/quote separate. Windows and macOS don't. -// Instead, we must never require two different casings of a file path. -// Because we want the download cache to match the proxy protocol, -// and because we want the proxy protocol to be possible to serve -// from a tree of static files (which might be stored on a case-insensitive -// file system), the proxy protocol must never require two different casings -// of a URL path either. -// -// One possibility would be to make the safe encoding be the lowercase -// hexadecimal encoding of the actual path bytes. This would avoid ever -// needing different casings of a file path, but it would be fairly illegible -// to most programmers when those paths appeared in the file system -// (including in file paths in compiler errors and stack traces) -// in web server logs, and so on. Instead, we want a safe encoding that -// leaves most paths unaltered. -// -// The safe encoding is this: -// replace every uppercase letter with an exclamation mark -// followed by the letter's lowercase equivalent. -// -// For example, -// github.com/Azure/azure-sdk-for-go -> github.com/!azure/azure-sdk-for-go. -// github.com/GoogleCloudPlatform/cloudsql-proxy -> github.com/!google!cloud!platform/cloudsql-proxy -// github.com/Sirupsen/logrus -> github.com/!sirupsen/logrus. -// -// Import paths that avoid upper-case letters are left unchanged. -// Note that because import paths are ASCII-only and avoid various -// problematic punctuation (like : < and >), the safe encoding is also ASCII-only -// and avoids the same problematic punctuation. -// -// Import paths have never allowed exclamation marks, so there is no -// need to define how to encode a literal !. -// -// Although paths are disallowed from using Unicode (see pathOK above), -// the eventual plan is to allow Unicode letters as well, to assume that -// file systems and URLs are Unicode-safe (storing UTF-8), and apply -// the !-for-uppercase convention. Note however that not all runes that -// are different but case-fold equivalent are an upper/lower pair. -// For example, U+004B ('K'), U+006B ('k'), and U+212A ('K' for Kelvin) -// are considered to case-fold to each other. When we do add Unicode -// letters, we must not assume that upper/lower are the only case-equivalent pairs. -// Perhaps the Kelvin symbol would be disallowed entirely, for example. -// Or perhaps it would encode as "!!k", or perhaps as "(212A)". -// -// Also, it would be nice to allow Unicode marks as well as letters, -// but marks include combining marks, and then we must deal not -// only with case folding but also normalization: both U+00E9 ('é') -// and U+0065 U+0301 ('e' followed by combining acute accent) -// look the same on the page and are treated by some file systems -// as the same path. If we do allow Unicode marks in paths, there -// must be some kind of normalization to allow only one canonical -// encoding of any character used in an import path. - -// EncodePath returns the safe encoding of the given module path. -// It fails if the module path is invalid. -func EncodePath(path string) (encoding string, err error) { - if err := CheckPath(path); err != nil { - return "", err - } - - return encodeString(path) -} - -// EncodeVersion returns the safe encoding of the given module version. -// Versions are allowed to be in non-semver form but must be valid file names -// and not contain exclamation marks. -func EncodeVersion(v string) (encoding string, err error) { - if err := checkElem(v, true); err != nil || strings.Contains(v, "!") { - return "", fmt.Errorf("disallowed version string %q", v) - } - return encodeString(v) -} - -func encodeString(s string) (encoding string, err error) { - haveUpper := false - for _, r := range s { - if r == '!' || r >= utf8.RuneSelf { - // This should be disallowed by CheckPath, but diagnose anyway. - // The correctness of the encoding loop below depends on it. - return "", fmt.Errorf("internal error: inconsistency in EncodePath") - } - if 'A' <= r && r <= 'Z' { - haveUpper = true - } - } - - if !haveUpper { - return s, nil - } - - var buf []byte - for _, r := range s { - if 'A' <= r && r <= 'Z' { - buf = append(buf, '!', byte(r+'a'-'A')) - } else { - buf = append(buf, byte(r)) - } - } - return string(buf), nil -} - -// DecodePath returns the module path of the given safe encoding. -// It fails if the encoding is invalid or encodes an invalid path. -func DecodePath(encoding string) (path string, err error) { - path, ok := decodeString(encoding) - if !ok { - return "", fmt.Errorf("invalid module path encoding %q", encoding) - } - if err := CheckPath(path); err != nil { - return "", fmt.Errorf("invalid module path encoding %q: %v", encoding, err) - } - return path, nil -} - -// DecodeVersion returns the version string for the given safe encoding. -// It fails if the encoding is invalid or encodes an invalid version. -// Versions are allowed to be in non-semver form but must be valid file names -// and not contain exclamation marks. -func DecodeVersion(encoding string) (v string, err error) { - v, ok := decodeString(encoding) - if !ok { - return "", fmt.Errorf("invalid version encoding %q", encoding) - } - if err := checkElem(v, true); err != nil { - return "", fmt.Errorf("disallowed version string %q", v) - } - return v, nil -} - -func decodeString(encoding string) (string, bool) { - var buf []byte - - bang := false - for _, r := range encoding { - if r >= utf8.RuneSelf { - return "", false - } - if bang { - bang = false - if r < 'a' || 'z' < r { - return "", false - } - buf = append(buf, byte(r+'A'-'a')) - continue - } - if r == '!' { - bang = true - continue - } - if 'A' <= r && r <= 'Z' { - return "", false - } - buf = append(buf, byte(r)) - } - if bang { - return "", false - } - return string(buf), true -} diff --git a/vendor/golang.org/x/tools/internal/semver/semver.go b/vendor/golang.org/x/tools/internal/semver/semver.go deleted file mode 100644 index 4af7118e..00000000 --- a/vendor/golang.org/x/tools/internal/semver/semver.go +++ /dev/null @@ -1,388 +0,0 @@ -// Copyright 2018 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 semver implements comparison of semantic version strings. -// In this package, semantic version strings must begin with a leading "v", -// as in "v1.0.0". -// -// The general form of a semantic version string accepted by this package is -// -// vMAJOR[.MINOR[.PATCH[-PRERELEASE][+BUILD]]] -// -// where square brackets indicate optional parts of the syntax; -// MAJOR, MINOR, and PATCH are decimal integers without extra leading zeros; -// PRERELEASE and BUILD are each a series of non-empty dot-separated identifiers -// using only alphanumeric characters and hyphens; and -// all-numeric PRERELEASE identifiers must not have leading zeros. -// -// This package follows Semantic Versioning 2.0.0 (see semver.org) -// with two exceptions. First, it requires the "v" prefix. Second, it recognizes -// vMAJOR and vMAJOR.MINOR (with no prerelease or build suffixes) -// as shorthands for vMAJOR.0.0 and vMAJOR.MINOR.0. -package semver - -// parsed returns the parsed form of a semantic version string. -type parsed struct { - major string - minor string - patch string - short string - prerelease string - build string - err string -} - -// IsValid reports whether v is a valid semantic version string. -func IsValid(v string) bool { - _, ok := parse(v) - return ok -} - -// Canonical returns the canonical formatting of the semantic version v. -// It fills in any missing .MINOR or .PATCH and discards build metadata. -// Two semantic versions compare equal only if their canonical formattings -// are identical strings. -// The canonical invalid semantic version is the empty string. -func Canonical(v string) string { - p, ok := parse(v) - if !ok { - return "" - } - if p.build != "" { - return v[:len(v)-len(p.build)] - } - if p.short != "" { - return v + p.short - } - return v -} - -// Major returns the major version prefix of the semantic version v. -// For example, Major("v2.1.0") == "v2". -// If v is an invalid semantic version string, Major returns the empty string. -func Major(v string) string { - pv, ok := parse(v) - if !ok { - return "" - } - return v[:1+len(pv.major)] -} - -// MajorMinor returns the major.minor version prefix of the semantic version v. -// For example, MajorMinor("v2.1.0") == "v2.1". -// If v is an invalid semantic version string, MajorMinor returns the empty string. -func MajorMinor(v string) string { - pv, ok := parse(v) - if !ok { - return "" - } - i := 1 + len(pv.major) - if j := i + 1 + len(pv.minor); j <= len(v) && v[i] == '.' && v[i+1:j] == pv.minor { - return v[:j] - } - return v[:i] + "." + pv.minor -} - -// Prerelease returns the prerelease suffix of the semantic version v. -// For example, Prerelease("v2.1.0-pre+meta") == "-pre". -// If v is an invalid semantic version string, Prerelease returns the empty string. -func Prerelease(v string) string { - pv, ok := parse(v) - if !ok { - return "" - } - return pv.prerelease -} - -// Build returns the build suffix of the semantic version v. -// For example, Build("v2.1.0+meta") == "+meta". -// If v is an invalid semantic version string, Build returns the empty string. -func Build(v string) string { - pv, ok := parse(v) - if !ok { - return "" - } - return pv.build -} - -// Compare returns an integer comparing two versions according to -// according to semantic version precedence. -// The result will be 0 if v == w, -1 if v < w, or +1 if v > w. -// -// An invalid semantic version string is considered less than a valid one. -// All invalid semantic version strings compare equal to each other. -func Compare(v, w string) int { - pv, ok1 := parse(v) - pw, ok2 := parse(w) - if !ok1 && !ok2 { - return 0 - } - if !ok1 { - return -1 - } - if !ok2 { - return +1 - } - if c := compareInt(pv.major, pw.major); c != 0 { - return c - } - if c := compareInt(pv.minor, pw.minor); c != 0 { - return c - } - if c := compareInt(pv.patch, pw.patch); c != 0 { - return c - } - return comparePrerelease(pv.prerelease, pw.prerelease) -} - -// Max canonicalizes its arguments and then returns the version string -// that compares greater. -func Max(v, w string) string { - v = Canonical(v) - w = Canonical(w) - if Compare(v, w) > 0 { - return v - } - return w -} - -func parse(v string) (p parsed, ok bool) { - if v == "" || v[0] != 'v' { - p.err = "missing v prefix" - return - } - p.major, v, ok = parseInt(v[1:]) - if !ok { - p.err = "bad major version" - return - } - if v == "" { - p.minor = "0" - p.patch = "0" - p.short = ".0.0" - return - } - if v[0] != '.' { - p.err = "bad minor prefix" - ok = false - return - } - p.minor, v, ok = parseInt(v[1:]) - if !ok { - p.err = "bad minor version" - return - } - if v == "" { - p.patch = "0" - p.short = ".0" - return - } - if v[0] != '.' { - p.err = "bad patch prefix" - ok = false - return - } - p.patch, v, ok = parseInt(v[1:]) - if !ok { - p.err = "bad patch version" - return - } - if len(v) > 0 && v[0] == '-' { - p.prerelease, v, ok = parsePrerelease(v) - if !ok { - p.err = "bad prerelease" - return - } - } - if len(v) > 0 && v[0] == '+' { - p.build, v, ok = parseBuild(v) - if !ok { - p.err = "bad build" - return - } - } - if v != "" { - p.err = "junk on end" - ok = false - return - } - ok = true - return -} - -func parseInt(v string) (t, rest string, ok bool) { - if v == "" { - return - } - if v[0] < '0' || '9' < v[0] { - return - } - i := 1 - for i < len(v) && '0' <= v[i] && v[i] <= '9' { - i++ - } - if v[0] == '0' && i != 1 { - return - } - return v[:i], v[i:], true -} - -func parsePrerelease(v string) (t, rest string, ok bool) { - // "A pre-release version MAY be denoted by appending a hyphen and - // a series of dot separated identifiers immediately following the patch version. - // Identifiers MUST comprise only ASCII alphanumerics and hyphen [0-9A-Za-z-]. - // Identifiers MUST NOT be empty. Numeric identifiers MUST NOT include leading zeroes." - if v == "" || v[0] != '-' { - return - } - i := 1 - start := 1 - for i < len(v) && v[i] != '+' { - if !isIdentChar(v[i]) && v[i] != '.' { - return - } - if v[i] == '.' { - if start == i || isBadNum(v[start:i]) { - return - } - start = i + 1 - } - i++ - } - if start == i || isBadNum(v[start:i]) { - return - } - return v[:i], v[i:], true -} - -func parseBuild(v string) (t, rest string, ok bool) { - if v == "" || v[0] != '+' { - return - } - i := 1 - start := 1 - for i < len(v) { - if !isIdentChar(v[i]) { - return - } - if v[i] == '.' { - if start == i { - return - } - start = i + 1 - } - i++ - } - if start == i { - return - } - return v[:i], v[i:], true -} - -func isIdentChar(c byte) bool { - return 'A' <= c && c <= 'Z' || 'a' <= c && c <= 'z' || '0' <= c && c <= '9' || c == '-' -} - -func isBadNum(v string) bool { - i := 0 - for i < len(v) && '0' <= v[i] && v[i] <= '9' { - i++ - } - return i == len(v) && i > 1 && v[0] == '0' -} - -func isNum(v string) bool { - i := 0 - for i < len(v) && '0' <= v[i] && v[i] <= '9' { - i++ - } - return i == len(v) -} - -func compareInt(x, y string) int { - if x == y { - return 0 - } - if len(x) < len(y) { - return -1 - } - if len(x) > len(y) { - return +1 - } - if x < y { - return -1 - } else { - return +1 - } -} - -func comparePrerelease(x, y string) int { - // "When major, minor, and patch are equal, a pre-release version has - // lower precedence than a normal version. - // Example: 1.0.0-alpha < 1.0.0. - // Precedence for two pre-release versions with the same major, minor, - // and patch version MUST be determined by comparing each dot separated - // identifier from left to right until a difference is found as follows: - // identifiers consisting of only digits are compared numerically and - // identifiers with letters or hyphens are compared lexically in ASCII - // sort order. Numeric identifiers always have lower precedence than - // non-numeric identifiers. A larger set of pre-release fields has a - // higher precedence than a smaller set, if all of the preceding - // identifiers are equal. - // Example: 1.0.0-alpha < 1.0.0-alpha.1 < 1.0.0-alpha.beta < - // 1.0.0-beta < 1.0.0-beta.2 < 1.0.0-beta.11 < 1.0.0-rc.1 < 1.0.0." - if x == y { - return 0 - } - if x == "" { - return +1 - } - if y == "" { - return -1 - } - for x != "" && y != "" { - x = x[1:] // skip - or . - y = y[1:] // skip - or . - var dx, dy string - dx, x = nextIdent(x) - dy, y = nextIdent(y) - if dx != dy { - ix := isNum(dx) - iy := isNum(dy) - if ix != iy { - if ix { - return -1 - } else { - return +1 - } - } - if ix { - if len(dx) < len(dy) { - return -1 - } - if len(dx) > len(dy) { - return +1 - } - } - if dx < dy { - return -1 - } else { - return +1 - } - } - } - if x == "" { - return -1 - } else { - return +1 - } -} - -func nextIdent(x string) (dx, rest string) { - i := 0 - for i < len(x) && x[i] != '.' { - i++ - } - return x[:i], x[i:] -} |