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Add an immutable tarball link to archive download headers for Nix (#31139) 

This allows `nix flake metadata` and nix in general to lock a *branch*
tarball link in a manner that causes it to fetch the correct commit even
if the branch is updated with a newer version.

Co-authored-by: Jade Lovelace <software@lfcode.ca>
Co-authored-by: wxiaoguang <wxiaoguang@gmail.com>
This commit is contained in:
Jörg Thalheim 2024-05-28 17:30:34 +02:00 committed by GitHub
parent 1e3c4d8fc7
commit 4fe415683e
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GPG Key ID: B5690EEEBB952194
3 changed files with 23 additions and 0 deletions
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6
routers/api/v1/repo/file.go
View File

@ -319,6 +319,12 @@ func archiveDownload(ctx *context.APIContext) {
func download(ctx *context.APIContext, archiveName string, archiver *repo_model.RepoArchiver) {
downloadName := ctx.Repo.Repository.Name + "-" + archiveName
// Add nix format link header so tarballs lock correctly:
// https://github.com/nixos/nix/blob/56763ff918eb308db23080e560ed2ea3e00c80a7/doc/manual/src/protocols/tarball-fetcher.md
ctx.Resp.Header().Add("Link", fmt.Sprintf(`<%s/archive/%s.tar.gz?rev=%s>; rel="immutable"`,
ctx.Repo.Repository.APIURL(),
archiver.CommitID, archiver.CommitID))
rPath := archiver.RelativePath()
if setting.RepoArchive.Storage.MinioConfig.ServeDirect {
// If we have a signed url (S3, object storage), redirect to this directly.

6
routers/web/repo/repo.go
View File

@ -484,6 +484,12 @@ func Download(ctx *context.Context) {
func download(ctx *context.Context, archiveName string, archiver *repo_model.RepoArchiver) {
downloadName := ctx.Repo.Repository.Name + "-" + archiveName
// Add nix format link header so tarballs lock correctly:
// https://github.com/nixos/nix/blob/56763ff918eb308db23080e560ed2ea3e00c80a7/doc/manual/src/protocols/tarball-fetcher.md
ctx.Resp.Header().Add("Link", fmt.Sprintf(`<%s/archive/%s.tar.gz?rev=%s>; rel="immutable"`,
ctx.Repo.Repository.APIURL(),
archiver.CommitID, archiver.CommitID))
rPath := archiver.RelativePath()
if setting.RepoArchive.Storage.MinioConfig.ServeDirect {
// If we have a signed url (S3, object storage), redirect to this directly.

11
tests/integration/api_repo_archive_test.go
View File

@ -8,6 +8,7 @@ import (
"io"
"net/http"
"net/url"
"regexp"
"testing"
auth_model "code.gitea.io/gitea/models/auth"
@ -39,6 +40,16 @@ func TestAPIDownloadArchive(t *testing.T) {
assert.NoError(t, err)
assert.Len(t, bs, 266)
// Must return a link to a commit ID as the "immutable" archive link
linkHeaderRe := regexp.MustCompile(`^<(https?://.*/api/v1/repos/user2/repo1/archive/[a-f0-9]+\.tar\.gz.*)>; rel="immutable"$`)
m := linkHeaderRe.FindStringSubmatch(resp.Header().Get("Link"))
assert.NotEmpty(t, m[1])
resp = MakeRequest(t, NewRequest(t, "GET", m[1]).AddTokenAuth(token), http.StatusOK)
bs2, err := io.ReadAll(resp.Body)
assert.NoError(t, err)
// The locked URL should give the same bytes as the non-locked one
assert.EqualValues(t, bs, bs2)
link, _ = url.Parse(fmt.Sprintf("/api/v1/repos/%s/%s/archive/master.bundle", user2.Name, repo.Name))
resp = MakeRequest(t, NewRequest(t, "GET", link.String()).AddTokenAuth(token), http.StatusOK)
bs, err = io.ReadAll(resp.Body)