forgejo/modules/options/base.go
wxiaoguang ce9dee5a1e
Introduce path Clean/Join helper functions (#23495)
Since #23493 has conflicts with latest commits, this PR is my proposal
for fixing #23371

Details are in the comments

And refactor the `modules/options` module, to make it always use
"filepath" to access local files.

Benefits:

* No need to do `util.CleanPath(strings.ReplaceAll(p, "\\", "/"))),
"/")` any more (not only one before)
* The function behaviors are clearly defined
2023-03-21 16:02:49 -04:00

135 lines
4.1 KiB
Go

// Copyright 2022 The Gitea Authors. All rights reserved.
// SPDX-License-Identifier: MIT
package options
import (
"fmt"
"io/fs"
"os"
"path/filepath"
"code.gitea.io/gitea/modules/log"
"code.gitea.io/gitea/modules/setting"
"code.gitea.io/gitea/modules/util"
)
var directories = make(directorySet)
// Locale reads the content of a specific locale from static/bindata or custom path.
func Locale(name string) ([]byte, error) {
return fileFromOptionsDir("locale", name)
}
// Readme reads the content of a specific readme from static/bindata or custom path.
func Readme(name string) ([]byte, error) {
return fileFromOptionsDir("readme", name)
}
// Gitignore reads the content of a gitignore locale from static/bindata or custom path.
func Gitignore(name string) ([]byte, error) {
return fileFromOptionsDir("gitignore", name)
}
// License reads the content of a specific license from static/bindata or custom path.
func License(name string) ([]byte, error) {
return fileFromOptionsDir("license", name)
}
// Labels reads the content of a specific labels from static/bindata or custom path.
func Labels(name string) ([]byte, error) {
return fileFromOptionsDir("label", name)
}
// WalkLocales reads the content of a specific locale
func WalkLocales(callback func(path, name string, d fs.DirEntry, err error) error) error {
if IsDynamic() {
if err := walkAssetDir(filepath.Join(setting.StaticRootPath, "options", "locale"), callback); err != nil && !os.IsNotExist(err) {
return fmt.Errorf("failed to walk locales. Error: %w", err)
}
}
if err := walkAssetDir(filepath.Join(setting.CustomPath, "options", "locale"), callback); err != nil && !os.IsNotExist(err) {
return fmt.Errorf("failed to walk locales. Error: %w", err)
}
return nil
}
func walkAssetDir(root string, callback func(path, name string, d fs.DirEntry, err error) error) error {
if err := filepath.WalkDir(root, func(path string, d fs.DirEntry, err error) error {
// name is the path relative to the root
name := path[len(root):]
if len(name) > 0 && name[0] == '/' {
name = name[1:]
}
if err != nil {
if os.IsNotExist(err) {
return callback(path, name, d, err)
}
return err
}
if util.CommonSkip(d.Name()) {
if d.IsDir() {
return fs.SkipDir
}
return nil
}
return callback(path, name, d, err)
}); err != nil && !os.IsNotExist(err) {
return fmt.Errorf("unable to get files for assets in %s: %w", root, err)
}
return nil
}
// mustLocalPathAbs coverts a path to absolute path
// FIXME: the old behavior (StaticRootPath might not be absolute), not ideal, just keep the same as before
func mustLocalPathAbs(s string) string {
abs, err := filepath.Abs(s)
if err != nil {
// This should never happen in a real system. If it happens, the user must have already been in trouble: the system is not able to resolve its own paths.
log.Fatal("Unable to get absolute path for %q: %v", s, err)
}
return abs
}
func joinLocalPaths(baseDirs []string, subDir string, elems ...string) (paths []string) {
abs := make([]string, len(elems)+2)
abs[1] = subDir
copy(abs[2:], elems)
for _, baseDir := range baseDirs {
abs[0] = mustLocalPathAbs(baseDir)
paths = append(paths, util.FilePathJoinAbs(abs...))
}
return paths
}
func listLocalDirIfExist(baseDirs []string, subDir string, elems ...string) (files []string, err error) {
for _, localPath := range joinLocalPaths(baseDirs, subDir, elems...) {
isDir, err := util.IsDir(localPath)
if err != nil {
return nil, fmt.Errorf("unable to check if path %q is a directory. %w", localPath, err)
} else if !isDir {
continue
}
dirFiles, err := util.StatDir(localPath, true)
if err != nil {
return nil, fmt.Errorf("unable to read directory %q. %w", localPath, err)
}
files = append(files, dirFiles...)
}
return files, nil
}
func readLocalFile(baseDirs []string, subDir string, elems ...string) ([]byte, error) {
for _, localPath := range joinLocalPaths(baseDirs, subDir, elems...) {
data, err := os.ReadFile(localPath)
if err == nil {
return data, nil
} else if !os.IsNotExist(err) {
log.Error("Unable to read file %q. Error: %v", localPath, err)
}
}
return nil, os.ErrNotExist
}