Statically compile templates in the final binary (#84)

vendor/github.com/shurcooL/httpfs/path/vfspath/match.go

@@ -0,0 +1,105 @@
+// Package vfspath implements utility routines for manipulating virtual file system paths.
+package vfspath
+
+import (
+	"net/http"
+	"os"
+	"path"
+	"sort"
+	"strings"
+
+	"github.com/shurcooL/httpfs/vfsutil"
+)
+
+const separator = "/"
+
+// 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 path.Match. The pattern may describe hierarchical names such as
+// /usr/*/bin/ed.
+//
+// Glob ignores file system errors such as I/O errors reading directories.
+// The only possible returned error is ErrBadPattern, when pattern
+// is malformed.
+func Glob(fs http.FileSystem, pattern string) (matches []string, err error) {
+	if !hasMeta(pattern) {
+		if _, err = vfsutil.Stat(fs, pattern); err != nil {
+			return nil, nil
+		}
+		return []string{pattern}, nil
+	}
+
+	dir, file := path.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(fs, dir, file, nil)
+	}
+
+	var m []string
+	m, err = Glob(fs, dir)
+	if err != nil {
+		return
+	}
+	for _, d := range m {
+		matches, err = glob(fs, 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.
+func glob(fs http.FileSystem, dir, pattern string, matches []string) (m []string, e error) {
+	m = matches
+	fi, err := vfsutil.Stat(fs, dir)
+	if err != nil {
+		return
+	}
+	if !fi.IsDir() {
+		return
+	}
+	fis, err := vfsutil.ReadDir(fs, dir)
+	if err != nil {
+		return
+	}
+
+	sort.Sort(byName(fis))
+
+	for _, fi := range fis {
+		n := fi.Name()
+		matched, err := path.Match(path.Clean(pattern), n)
+		if err != nil {
+			return m, err
+		}
+		if matched {
+			m = append(m, path.Join(dir, n))
+		}
+	}
+	return
+}
+
+// hasMeta reports whether 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.ContainsAny(path, "*?[")
+}
+
+// byName implements sort.Interface.
+type byName []os.FileInfo
+
+func (f byName) Len() int           { return len(f) }
+func (f byName) Less(i, j int) bool { return f[i].Name() < f[j].Name() }
+func (f byName) Swap(i, j int)      { f[i], f[j] = f[j], f[i] }