From 0e53d2555e9a6ddc707f6c59497f30e182116c80 Mon Sep 17 00:00:00 2001 From: Michael Muré Date: Wed, 10 Apr 2019 20:30:34 +0200 Subject: force a version of golang.org/x/tools due to an incompatibility with gqlgen --- .../golang.org/x/tools/internal/gopathwalk/walk.go | 250 +++++++++++++++++++++ 1 file changed, 250 insertions(+) create mode 100644 vendor/golang.org/x/tools/internal/gopathwalk/walk.go (limited to 'vendor/golang.org/x/tools/internal/gopathwalk') diff --git a/vendor/golang.org/x/tools/internal/gopathwalk/walk.go b/vendor/golang.org/x/tools/internal/gopathwalk/walk.go new file mode 100644 index 00000000..04bb96a3 --- /dev/null +++ b/vendor/golang.org/x/tools/internal/gopathwalk/walk.go @@ -0,0 +1,250 @@ +// 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 /.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 + } + +} -- cgit