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// Copyright 2017 The Gitea Authors. All rights reserved.
// SPDX-License-Identifier: MIT
//go:build ignore
package main
import (
"archive/tar"
"compress/gzip"
"crypto/md5"
"encoding/hex"
"flag"
"fmt"
"io"
"log"
"net/http"
"os"
"path"
"path/filepath"
"strings"
"code.gitea.io/gitea/build/license"
"code.gitea.io/gitea/modules/json"
"code.gitea.io/gitea/modules/util"
)
func main() {
var (
prefix = "gitea-licenses"
url = "https://api.github.com/repos/spdx/license-list-data/tarball"
githubApiToken = ""
githubUsername = ""
destination = ""
)
flag.StringVar(&destination, "dest", "options/license/", "destination for the licenses")
flag.StringVar(&githubUsername, "username", "", "github username")
flag.StringVar(&githubApiToken, "token", "", "github api token")
flag.Parse()
file, err := os.CreateTemp(os.TempDir(), prefix)
if err != nil {
log.Fatalf("Failed to create temp file. %s", err)
}
defer util.Remove(file.Name())
if err := os.RemoveAll(destination); err != nil {
log.Fatalf("Cannot clean destination folder: %v", err)
}
if err := os.MkdirAll(destination, 0o755); err != nil {
log.Fatalf("Cannot create destination: %v", err)
}
req, err := http.NewRequest("GET", url, nil)
if err != nil {
log.Fatalf("Failed to download archive. %s", err)
}
if len(githubApiToken) > 0 && len(githubUsername) > 0 {
req.SetBasicAuth(githubUsername, githubApiToken)
}
resp, err := http.DefaultClient.Do(req)
if err != nil {
log.Fatalf("Failed to download archive. %s", err)
}
defer resp.Body.Close()
if _, err := io.Copy(file, resp.Body); err != nil {
log.Fatalf("Failed to copy archive to file. %s", err)
}
if _, err := file.Seek(0, 0); err != nil {
log.Fatalf("Failed to reset seek on archive. %s", err)
}
gz, err := gzip.NewReader(file)
if err != nil {
log.Fatalf("Failed to gunzip the archive. %s", err)
}
tr := tar.NewReader(gz)
aliasesFiles := make(map[string][]string)
for {
hdr, err := tr.Next()
if err == io.EOF {
break
}
if err != nil {
log.Fatalf("Failed to iterate archive. %s", err)
}
if !strings.Contains(hdr.Name, "/text/") {
continue
}
if filepath.Ext(hdr.Name) != ".txt" {
continue
}
fileBaseName := filepath.Base(hdr.Name)
licenseName := strings.TrimSuffix(fileBaseName, ".txt")
if strings.HasPrefix(fileBaseName, "README") {
continue
}
if strings.HasPrefix(fileBaseName, "deprecated_") {
continue
}
out, err := os.Create(path.Join(destination, licenseName))
if err != nil {
log.Fatalf("Failed to create new file. %s", err)
}
defer out.Close()
// some license files have same content, so we need to detect these files and create a convert map into a json file
// Later we use this convert map to avoid adding same license content with different license name
h := md5.New()
// calculate md5 and write file in the same time
r := io.TeeReader(tr, h)
if _, err := io.Copy(out, r); err != nil {
log.Fatalf("Failed to write new file. %s", err)
} else {
fmt.Printf("Written %s\n", out.Name())
md5 := hex.EncodeToString(h.Sum(nil))
aliasesFiles[md5] = append(aliasesFiles[md5], licenseName)
}
}
// generate convert license name map
licenseAliases := make(map[string]string)
for _, fileNames := range aliasesFiles {
if len(fileNames) > 1 {
licenseName := license.GetLicenseNameFromAliases(fileNames)
if licenseName == "" {
// license name should not be empty as expected
// if it is empty, we need to rewrite the logic of GetLicenseNameFromAliases
log.Fatalf("GetLicenseNameFromAliases: license name is empty")
}
for _, fileName := range fileNames {
licenseAliases[fileName] = licenseName
}
}
}
// save convert license name map to file
b, err := json.Marshal(licenseAliases)
if err != nil {
log.Fatalf("Failed to create json bytes. %s", err)
}
licenseAliasesDestination := filepath.Join(destination, "etc", "license-aliases.json")
if err := os.MkdirAll(filepath.Dir(licenseAliasesDestination), 0o755); err != nil {
log.Fatalf("Failed to create directory for license aliases json file. %s", err)
}
f, err := os.Create(licenseAliasesDestination)
if err != nil {
log.Fatalf("Failed to create license aliases json file. %s", err)
}
defer f.Close()
if _, err = f.Write(b); err != nil {
log.Fatalf("Failed to write license aliases json file. %s", err)
}
fmt.Println("Done")
}
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