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

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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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3 changed files with 23 additions and 0 deletions
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6
routers/web/repo/repo.go
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@ -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.