// IsDir behaves like os.Stat plus IsDir,
// but uses the build context's file system interface, if any.
func IsDir(ctxt *build.Context, path string) bool {
	if ctxt.IsDir != nil {
		return ctxt.IsDir(path)
	}
	fi, err := os.Stat(path)
	return err == nil && fi.IsDir()
}
Beispiel #2
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// Setup configures a *build.Context to use the given VFS
// as its filesystem.
func Setup(ctx *build.Context, fs vfs.VFS) {
	ctx.JoinPath = path.Join
	ctx.SplitPathList = filepath.SplitList
	ctx.IsAbsPath = func(p string) bool {
		return p != "" && p[0] == '/'
	}
	ctx.IsDir = func(p string) bool {
		stat, err := fs.Stat(p)
		return err == nil && stat.IsDir()
	}
	ctx.HasSubdir = func(root, dir string) (string, bool) {
		root = path.Clean(root)
		if !strings.HasSuffix(root, separator) {
			root += separator
		}
		dir = path.Clean(dir)
		if !strings.HasPrefix(dir, root) {
			return "", false
		}
		return dir[len(root):], true
	}
	ctx.ReadDir = fs.ReadDir
	ctx.OpenFile = func(p string) (io.ReadCloser, error) {
		return fs.Open(p)
	}
}
Beispiel #3
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func (w *Walker) setMemoryContext(ctxt *build.Context) {
	ctxt.JoinPath = path.Join
	ctxt.IsAbsPath = path.IsAbs
	ctxt.IsDir = func(path string) bool { panic("unexpected") }
	ctxt.HasSubdir = func(root, dir string) (rel string, ok bool) { panic("unexpected") }
	ctxt.ReadDir = func(dir string) (fi []os.FileInfo, err error) { return w.readDir(dir) }
	ctxt.OpenFile = func(path string) (r io.ReadCloser, err error) { return w.openFile(path) }
}
Beispiel #4
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// Import returns details about the package in the directory.
func (dir *Directory) Import(ctx *build.Context, mode build.ImportMode) (*build.Package, error) {
	safeCopy := *ctx
	ctx = &safeCopy
	ctx.JoinPath = path.Join
	ctx.IsAbsPath = path.IsAbs
	ctx.SplitPathList = func(list string) []string { return strings.Split(list, ":") }
	ctx.IsDir = func(path string) bool { return false }
	ctx.HasSubdir = func(root, dir string) (rel string, ok bool) { return "", false }
	ctx.ReadDir = dir.readDir
	ctx.OpenFile = dir.openFile
	return ctx.ImportDir(".", mode)
}