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// Copyright 2024 The Gitea Authors. All rights reserved.
// SPDX-License-Identifier: MIT
package git
import (
"bufio"
"fmt"
"io"
"strings"
)
// SubModule is a reference on git repository
type SubModule struct {
Path string
URL string
Branch string // this field is newly added but not really used
}
// configParseSubModules this is not a complete parse for gitmodules file, it only
// parses the url and path of submodules. At the moment it only parses well-formed gitmodules files.
// In the future, there should be a complete implementation of https://git-scm.com/docs/git-config#_syntax
func configParseSubModules(r io.Reader) (*ObjectCache[*SubModule], error) {
var subModule *SubModule
subModules := newObjectCache[*SubModule]()
scanner := bufio.NewScanner(r)
for scanner.Scan() {
line := strings.TrimSpace(scanner.Text())
// Skip empty lines and comments
if line == "" || strings.HasPrefix(line, "#") || strings.HasPrefix(line, ";") {
continue
}
// Section header [section]
if strings.HasPrefix(line, "[") && strings.HasSuffix(line, "]") {
if subModule != nil {
subModules.Set(subModule.Path, subModule)
}
if strings.HasPrefix(line, "[submodule") {
subModule = &SubModule{}
} else {
subModule = nil
}
continue
}
if subModule == nil {
continue
}
parts := strings.SplitN(line, "=", 2)
if len(parts) != 2 {
continue
}
key := strings.TrimSpace(parts[0])
value := strings.TrimSpace(parts[1])
switch key {
case "path":
subModule.Path = value
case "url":
subModule.URL = value
case "branch":
subModule.Branch = value
}
}
if err := scanner.Err(); err != nil {
return nil, fmt.Errorf("error reading file: %w", err)
}
if subModule != nil {
subModules.Set(subModule.Path, subModule)
}
return subModules, nil
}
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