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// Copyright 2019 The Hugo Authors. All rights reserved.
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
package glob
import (
"path"
"path/filepath"
"strings"
"sync"
"github.com/gobwas/glob"
"github.com/gobwas/glob/syntax"
)
type globErr struct {
glob glob.Glob
err error
}
var (
globCache = make(map[string]globErr)
globMu sync.RWMutex
)
type caseInsensitiveGlob struct {
g glob.Glob
}
func (g caseInsensitiveGlob) Match(s string) bool {
return g.g.Match(strings.ToLower(s))
}
func GetGlob(pattern string) (glob.Glob, error) {
var eg globErr
globMu.RLock()
var found bool
eg, found = globCache[pattern]
globMu.RUnlock()
if found {
return eg.glob, eg.err
}
var err error
g, err := glob.Compile(strings.ToLower(pattern), '/')
eg = globErr{caseInsensitiveGlob{g: g}, err}
globMu.Lock()
globCache[pattern] = eg
globMu.Unlock()
return eg.glob, eg.err
}
func NormalizePath(p string) string {
return strings.Trim(path.Clean(filepath.ToSlash(strings.ToLower(p))), "/.")
}
// ResolveRootDir takes a normalized path on the form "assets/**.json" and
// determines any root dir, i.e. any start path without any wildcards.
func ResolveRootDir(p string) string {
parts := strings.Split(path.Dir(p), "/")
var roots []string
for _, part := range parts {
if HasGlobChar(part) {
break
}
roots = append(roots, part)
}
if len(roots) == 0 {
return ""
}
return strings.Join(roots, "/")
}
// FilterGlobParts removes any string with glob wildcard.
func FilterGlobParts(a []string) []string {
b := a[:0]
for _, x := range a {
if !HasGlobChar(x) {
b = append(b, x)
}
}
return b
}
// HasGlobChar returns whether s contains any glob wildcards.
func HasGlobChar(s string) bool {
for i := 0; i < len(s); i++ {
if syntax.Special(s[i]) {
return true
}
}
return false
}
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