Reduce duplicate and useless code in options (#23369)

Avoid maintaining two copies of code, some functions can be used with
both `bindata` and `no bindata`.

And removed `GetRepoInitFile`, it's useless now.
`Readme`/`Gitignore`/`License`/`Labels` will clean the name and use
custom files when available.

6 files changed, 74 insertions, 158 deletions

diff --git a/modules/label/parser.go b/modules/label/parser.go
index 768c72a61..55bf570de 100644
--- a/modules/label/parser.go
+++ b/modules/label/parser.go
@@ -36,17 +36,17 @@ func (err ErrTemplateLoad) Error() string {
 // GetTemplateFile loads the label template file by given name,
 // then parses and returns a list of name-color pairs and optionally description.
 func GetTemplateFile(name string) ([]*Label, error) {
-	data, err := options.GetRepoInitFile("label", name+".yaml")
+	data, err := options.Labels(name + ".yaml")
 	if err == nil && len(data) > 0 {
 		return parseYamlFormat(name+".yaml", data)
 	}
 
-	data, err = options.GetRepoInitFile("label", name+".yml")
+	data, err = options.Labels(name + ".yml")
 	if err == nil && len(data) > 0 {
 		return parseYamlFormat(name+".yml", data)
 	}
 
-	data, err = options.GetRepoInitFile("label", name)
+	data, err = options.Labels(name)
 	if err != nil {
 		return nil, ErrTemplateLoad{name, fmt.Errorf("GetRepoInitFile: %w", err)}
 	}
diff --git a/modules/options/base.go b/modules/options/base.go
index 039e934b3..3c140f643 100644
--- a/modules/options/base.go
+++ b/modules/options/base.go
@@ -7,11 +7,52 @@ import (
 	"fmt"
 	"io/fs"
 	"os"
+	"path"
 	"path/filepath"
 
+	"code.gitea.io/gitea/modules/setting"
 	"code.gitea.io/gitea/modules/util"
 )
 
+// Locale reads the content of a specific locale from static/bindata or custom path.
+func Locale(name string) ([]byte, error) {
+	return fileFromDir(path.Join("locale", path.Clean("/"+name)))
+}
+
+// Readme reads the content of a specific readme from static/bindata or custom path.
+func Readme(name string) ([]byte, error) {
+	return fileFromDir(path.Join("readme", path.Clean("/"+name)))
+}
+
+// Gitignore reads the content of a gitignore locale from static/bindata or custom path.
+func Gitignore(name string) ([]byte, error) {
+	return fileFromDir(path.Join("gitignore", path.Clean("/"+name)))
+}
+
+// License reads the content of a specific license from static/bindata or custom path.
+func License(name string) ([]byte, error) {
+	return fileFromDir(path.Join("license", path.Clean("/"+name)))
+}
+
+// Labels reads the content of a specific labels from static/bindata or custom path.
+func Labels(name string) ([]byte, error) {
+	return fileFromDir(path.Join("label", path.Clean("/"+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
@@ -37,3 +78,18 @@ func walkAssetDir(root string, callback func(path, name string, d fs.DirEntry, e
 	}
 	return nil
 }
+
+func statDirIfExist(dir string) ([]string, error) {
+	isDir, err := util.IsDir(dir)
+	if err != nil {
+		return nil, fmt.Errorf("unable to check if static directory %s is a directory. %w", dir, err)
+	}
+	if !isDir {
+		return nil, nil
+	}
+	files, err := util.StatDir(dir, true)
+	if err != nil {
+		return nil, fmt.Errorf("unable to read directory %q. %w", dir, err)
+	}
+	return files, nil
+}
diff --git a/modules/options/dynamic.go b/modules/options/dynamic.go
index f9b3714b8..8c954492a 100644
--- a/modules/options/dynamic.go
+++ b/modules/options/dynamic.go
@@ -7,10 +7,8 @@ package options
 
 import (
 	"fmt"
-	"io/fs"
 	"os"
 	"path"
-	"path/filepath"
 
 	"code.gitea.io/gitea/modules/log"
 	"code.gitea.io/gitea/modules/setting"
@@ -27,76 +25,20 @@ func Dir(name string) ([]string, error) {
 
 	var result []string
 
-	customDir := path.Join(setting.CustomPath, "options", name)
-
-	isDir, err := util.IsDir(customDir)
-	if err != nil {
-		return []string{}, fmt.Errorf("Unabe to check if custom directory %s is a directory. %w", customDir, err)
-	}
-	if isDir {
-		files, err := util.StatDir(customDir, true)
-		if err != nil {
-			return []string{}, fmt.Errorf("Failed to read custom directory. %w", err)
-		}
-
-		result = append(result, files...)
-	}
-
-	staticDir := path.Join(setting.StaticRootPath, "options", name)
-
-	isDir, err = util.IsDir(staticDir)
-	if err != nil {
-		return []string{}, fmt.Errorf("unable to check if static directory %s is a directory. %w", staticDir, err)
-	}
-	if isDir {
-		files, err := util.StatDir(staticDir, true)
+	for _, dir := range []string{
+		path.Join(setting.CustomPath, "options", name),     // custom dir
+		path.Join(setting.StaticRootPath, "options", name), // static dir
+	} {
+		files, err := statDirIfExist(dir)
 		if err != nil {
-			return []string{}, fmt.Errorf("Failed to read static directory. %w", err)
+			return nil, err
 		}
-
 		result = append(result, files...)
 	}
 
 	return directories.AddAndGet(name, result), nil
 }
 
-// Locale reads the content of a specific locale from static or custom path.
-func Locale(name string) ([]byte, error) {
-	return fileFromDir(path.Join("locale", name))
-}
-
-// WalkLocales reads the content of a specific locale from static or custom path.
-func WalkLocales(callback func(path, name string, d fs.DirEntry, err error) error) error {
-	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
-}
-
-// Readme reads the content of a specific readme from static or custom path.
-func Readme(name string) ([]byte, error) {
-	return fileFromDir(path.Join("readme", path.Clean("/"+name)))
-}
-
-// Gitignore reads the content of a specific gitignore from static or custom path.
-func Gitignore(name string) ([]byte, error) {
-	return fileFromDir(path.Join("gitignore", path.Clean("/"+name)))
-}
-
-// License reads the content of a specific license from static or custom path.
-func License(name string) ([]byte, error) {
-	return fileFromDir(path.Join("license", path.Clean("/"+name)))
-}
-
-// Labels reads the content of a specific labels from static or custom path.
-func Labels(name string) ([]byte, error) {
-	return fileFromDir(path.Join("label", path.Clean("/"+name)))
-}
-
 // fileFromDir is a helper to read files from static or custom path.
 func fileFromDir(name string) ([]byte, error) {
 	customPath := path.Join(setting.CustomPath, "options", name)
diff --git a/modules/options/repo.go b/modules/options/repo.go
deleted file mode 100644
index 1480f7808..000000000
--- a/modules/options/repo.go
+++ /dev/null
@@ -1,44 +0,0 @@
-// Copyright 2023 The Gitea Authors. All rights reserved.
-// SPDX-License-Identifier: MIT
-
-package options
-
-import (
-	"fmt"
-	"os"
-	"path"
-	"strings"
-
-	"code.gitea.io/gitea/modules/log"
-	"code.gitea.io/gitea/modules/setting"
-	"code.gitea.io/gitea/modules/util"
-)
-
-// GetRepoInitFile returns repository init files
-func GetRepoInitFile(tp, name string) ([]byte, error) {
-	cleanedName := strings.TrimLeft(path.Clean("/"+name), "/")
-	relPath := path.Join("options", tp, cleanedName)
-
-	// Use custom file when available.
-	customPath := path.Join(setting.CustomPath, relPath)
-	isFile, err := util.IsFile(customPath)
-	if err != nil {
-		log.Error("Unable to check if %s is a file. Error: %v", customPath, err)
-	}
-	if isFile {
-		return os.ReadFile(customPath)
-	}
-
-	switch tp {
-	case "readme":
-		return Readme(cleanedName)
-	case "gitignore":
-		return Gitignore(cleanedName)
-	case "license":
-		return License(cleanedName)
-	case "label":
-		return Labels(cleanedName)
-	default:
-		return []byte{}, fmt.Errorf("Invalid init file type")
-	}
-}
diff --git a/modules/options/static.go b/modules/options/static.go
index 2405d658b..549f4e25b 100644
--- a/modules/options/static.go
+++ b/modules/options/static.go
@@ -8,10 +8,8 @@ package options
 import (
 	"fmt"
 	"io"
-	"io/fs"
 	"os"
 	"path"
-	"path/filepath"
 
 	"code.gitea.io/gitea/modules/log"
 	"code.gitea.io/gitea/modules/setting"
@@ -28,17 +26,14 @@ func Dir(name string) ([]string, error) {
 
 	var result []string
 
-	customDir := path.Join(setting.CustomPath, "options", name)
-	isDir, err := util.IsDir(customDir)
-	if err != nil {
-		return []string{}, fmt.Errorf("unable to check if custom directory %q is a directory. %w", customDir, err)
-	}
-	if isDir {
-		files, err := util.StatDir(customDir, true)
+	for _, dir := range []string{
+		path.Join(setting.CustomPath, "options", name), // custom dir
+		// no static dir
+	} {
+		files, err := statDirIfExist(dir)
 		if err != nil {
-			return []string{}, fmt.Errorf("unable to read custom directory %q. %w", customDir, err)
+			return nil, err
 		}
-
 		result = append(result, files...)
 	}
 
@@ -69,39 +64,6 @@ func AssetDir(dirName string) ([]string, error) {
 	return results, nil
 }
 
-// Locale reads the content of a specific locale from bindata or custom path.
-func Locale(name string) ([]byte, error) {
-	return fileFromDir(path.Join("locale", name))
-}
-
-// WalkLocales reads the content of a specific locale from static or custom path.
-func WalkLocales(callback func(path, name string, d fs.DirEntry, err error) error) error {
-	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
-}
-
-// Readme reads the content of a specific readme from bindata or custom path.
-func Readme(name string) ([]byte, error) {
-	return fileFromDir(path.Join("readme", path.Clean("/"+name)))
-}
-
-// Gitignore reads the content of a gitignore locale from bindata or custom path.
-func Gitignore(name string) ([]byte, error) {
-	return fileFromDir(path.Join("gitignore", path.Clean("/"+name)))
-}
-
-// License reads the content of a specific license from bindata or custom path.
-func License(name string) ([]byte, error) {
-	return fileFromDir(path.Join("license", path.Clean("/"+name)))
-}
-
-// Labels reads the content of a specific labels from static or custom path.
-func Labels(name string) ([]byte, error) {
-	return fileFromDir(path.Join("label", path.Clean("/"+name)))
-}
-
 // fileFromDir is a helper to read files from bindata or custom path.
 func fileFromDir(name string) ([]byte, error) {
 	customPath := path.Join(setting.CustomPath, "options", name)
diff --git a/modules/repository/init.go b/modules/repository/init.go
index 49c8d2a90..f9a33cd4f 100644
--- a/modules/repository/init.go
+++ b/modules/repository/init.go
@@ -136,7 +136,7 @@ func prepareRepoCommit(ctx context.Context, repo *repo_model.Repository, tmpDir,
 	}
 
 	// README
-	data, err := options.GetRepoInitFile("readme", opts.Readme)
+	data, err := options.Readme(opts.Readme)
 	if err != nil {
 		return fmt.Errorf("GetRepoInitFile[%s]: %w", opts.Readme, err)
 	}
@@ -164,7 +164,7 @@ func prepareRepoCommit(ctx context.Context, repo *repo_model.Repository, tmpDir,
 		var buf bytes.Buffer
 		names := strings.Split(opts.Gitignores, ",")
 		for _, name := range names {
-			data, err = options.GetRepoInitFile("gitignore", name)
+			data, err = options.Gitignore(name)
 			if err != nil {
 				return fmt.Errorf("GetRepoInitFile[%s]: %w", name, err)
 			}
@@ -182,7 +182,7 @@ func prepareRepoCommit(ctx context.Context, repo *repo_model.Repository, tmpDir,
 
 	// LICENSE
 	if len(opts.License) > 0 {
-		data, err = options.GetRepoInitFile("license", opts.License)
+		data, err = options.License(opts.License)
 		if err != nil {
 			return fmt.Errorf("GetRepoInitFile[%s]: %w", opts.License, err)
 		}