diff options
Diffstat (limited to 'vendor/golang.org/x/tools/go/buildutil/allpackages.go')
| -rw-r--r-- | vendor/golang.org/x/tools/go/buildutil/allpackages.go | 198 |
1 files changed, 0 insertions, 198 deletions
diff --git a/vendor/golang.org/x/tools/go/buildutil/allpackages.go b/vendor/golang.org/x/tools/go/buildutil/allpackages.go deleted file mode 100644 index c0cb03e..0000000 --- a/vendor/golang.org/x/tools/go/buildutil/allpackages.go +++ /dev/null @@ -1,198 +0,0 @@ -// Copyright 2014 The Go Authors. All rights reserved. -// Use of this source code is governed by a BSD-style -// license that can be found in the LICENSE file. - -// Package buildutil provides utilities related to the go/build -// package in the standard library. -// -// All I/O is done via the build.Context file system interface, which must -// be concurrency-safe. -package buildutil // import "golang.org/x/tools/go/buildutil" - -import ( - "go/build" - "os" - "path/filepath" - "sort" - "strings" - "sync" -) - -// AllPackages returns the package path of each Go package in any source -// directory of the specified build context (e.g. $GOROOT or an element -// of $GOPATH). Errors are ignored. The results are sorted. -// All package paths are canonical, and thus may contain "/vendor/". -// -// The result may include import paths for directories that contain no -// *.go files, such as "archive" (in $GOROOT/src). -// -// All I/O is done via the build.Context file system interface, -// which must be concurrency-safe. -// -func AllPackages(ctxt *build.Context) []string { - var list []string - ForEachPackage(ctxt, func(pkg string, _ error) { - list = append(list, pkg) - }) - sort.Strings(list) - return list -} - -// ForEachPackage calls the found function with the package path of -// each Go package it finds in any source directory of the specified -// build context (e.g. $GOROOT or an element of $GOPATH). -// All package paths are canonical, and thus may contain "/vendor/". -// -// If the package directory exists but could not be read, the second -// argument to the found function provides the error. -// -// All I/O is done via the build.Context file system interface, -// which must be concurrency-safe. -// -func ForEachPackage(ctxt *build.Context, found func(importPath string, err error)) { - ch := make(chan item) - - var wg sync.WaitGroup - for _, root := range ctxt.SrcDirs() { - root := root - wg.Add(1) - go func() { - allPackages(ctxt, root, ch) - wg.Done() - }() - } - go func() { - wg.Wait() - close(ch) - }() - - // All calls to found occur in the caller's goroutine. - for i := range ch { - found(i.importPath, i.err) - } -} - -type item struct { - importPath string - err error // (optional) -} - -// We use a process-wide counting semaphore to limit -// the number of parallel calls to ReadDir. -var ioLimit = make(chan bool, 20) - -func allPackages(ctxt *build.Context, root string, ch chan<- item) { - root = filepath.Clean(root) + string(os.PathSeparator) - - var wg sync.WaitGroup - - var walkDir func(dir string) - walkDir = func(dir string) { - // Avoid .foo, _foo, and testdata directory trees. - base := filepath.Base(dir) - if base == "" || base[0] == '.' || base[0] == '_' || base == "testdata" { - return - } - - pkg := filepath.ToSlash(strings.TrimPrefix(dir, root)) - - // Prune search if we encounter any of these import paths. - switch pkg { - case "builtin": - return - } - - ioLimit <- true - files, err := ReadDir(ctxt, dir) - <-ioLimit - if pkg != "" || err != nil { - ch <- item{pkg, err} - } - for _, fi := range files { - fi := fi - if fi.IsDir() { - wg.Add(1) - go func() { - walkDir(filepath.Join(dir, fi.Name())) - wg.Done() - }() - } - } - } - - walkDir(root) - wg.Wait() -} - -// ExpandPatterns returns the set of packages matched by patterns, -// which may have the following forms: -// -// golang.org/x/tools/cmd/guru # a single package -// golang.org/x/tools/... # all packages beneath dir -// ... # the entire workspace. -// -// Order is significant: a pattern preceded by '-' removes matching -// packages from the set. For example, these patterns match all encoding -// packages except encoding/xml: -// -// encoding/... -encoding/xml -// -// A trailing slash in a pattern is ignored. (Path components of Go -// package names are separated by slash, not the platform's path separator.) -// -func ExpandPatterns(ctxt *build.Context, patterns []string) map[string]bool { - // TODO(adonovan): support other features of 'go list': - // - "std"/"cmd"/"all" meta-packages - // - "..." not at the end of a pattern - // - relative patterns using "./" or "../" prefix - - pkgs := make(map[string]bool) - doPkg := func(pkg string, neg bool) { - if neg { - delete(pkgs, pkg) - } else { - pkgs[pkg] = true - } - } - - // Scan entire workspace if wildcards are present. - // TODO(adonovan): opt: scan only the necessary subtrees of the workspace. - var all []string - for _, arg := range patterns { - if strings.HasSuffix(arg, "...") { - all = AllPackages(ctxt) - break - } - } - - for _, arg := range patterns { - if arg == "" { - continue - } - - neg := arg[0] == '-' - if neg { - arg = arg[1:] - } - - if arg == "..." { - // ... matches all packages - for _, pkg := range all { - doPkg(pkg, neg) - } - } else if dir := strings.TrimSuffix(arg, "/..."); dir != arg { - // dir/... matches all packages beneath dir - for _, pkg := range all { - if strings.HasPrefix(pkg, dir) && - (len(pkg) == len(dir) || pkg[len(dir)] == '/') { - doPkg(pkg, neg) - } - } - } else { - // single package - doPkg(strings.TrimSuffix(arg, "/"), neg) - } - } - - return pkgs -} |