forgejo-federation/build/generate-go-licenses.go

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// Copyright 2022 The Gitea Authors. All rights reserved.
// SPDX-License-Identifier: MIT
//go:build ignore
package main
import (
"encoding/json"
"io/fs"
"os"
goPath "path"
"path/filepath"
"regexp"
"sort"
"strings"
)
// regexp is based on go-license, excluding README and NOTICE
// https://github.com/google/go-licenses/blob/master/licenses/find.go
var licenseRe = regexp.MustCompile(`^(?i)((UN)?LICEN(S|C)E|COPYING).*$`)
type LicenseEntry struct {
Name string `json:"name"`
Path string `json:"path"`
LicenseText string `json:"licenseText"`
}
func main() {
base, out := os.Args[1], os.Args[2]
paths := []string{}
err := filepath.WalkDir(base, func(path string, entry fs.DirEntry, err error) error {
if err != nil {
return err
}
if entry.IsDir() || !licenseRe.MatchString(entry.Name()) {
return nil
}
paths = append(paths, path)
return nil
})
if err != nil {
panic(err)
}
sort.Strings(paths)
entries := []LicenseEntry{}
for _, path := range paths {
path := filepath.ToSlash(path)
licenseText, err := os.ReadFile(path)
if err != nil {
panic(err)
}
path = strings.Replace(path, base+"/", "", 1)
name := goPath.Dir(path)
// There might be a bug somewhere in go-licenses that sometimes interprets the
// root package as "." and sometimes as "code.gitea.io/gitea". Workaround by
// removing both of them for the sake of stable output.
if name == "." || name == "code.gitea.io/gitea" {
continue
}
entries = append(entries, LicenseEntry{
Name: name,
Path: path,
LicenseText: string(licenseText),
})
}
jsonBytes, err := json.MarshalIndent(entries, "", " ")
if err != nil {
panic(err)
}
err = os.WriteFile(out, jsonBytes, 0o644)
if err != nil {
panic(err)
}
}