Commits on May 28, 2024

1. Add an immutable tarball link to archive download headers for Nix …

   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.
   
   For further context, Nix flakes are a feature that, among other things,
   allows for "inputs" that are "github:someuser/somerepo",
   "https://some-tarball-service/some-tarball.tar.gz",
   "sourcehut:~meow/nya" or similar. This feature allows our users to fetch
   tarballs of git-based inputs to their builds rather than using git to
   fetch them, saving significant download time.
   
   There is presently no gitea or forgejo specific fetcher in Nix, and we
   don't particularly wish to have one. Ideally (as a developer on a Nix
   implementation myself) we could just use the generic tarball fetcher and
   not add specific forgejo support, but to do so, we need additional
   metadata to know which commit a given *branch* tarball represents, which
   is the purpose of the Link header added here.
   
   The result of this patch is that a Nix user can specify `inputs.something.url =
   "https://forgejo-host/some/project/archive/main.tar.gz"` in flake.nix
   and get a link to some concrete tarball for the actual commit in the
   lock file, then when they run `nix flake update` in the future, they
   will get the latest commit in that branch.
   
   Example of it working locally:
   
    » nix flake metadata --refresh 'http://localhost:3000/api/v1/repos/jade/cats/archive/main.tar.gz?dir=configs/nix'
   Resolved URL:  http://localhost:3000/api/v1/repos/jade/cats/archive/main.tar.gz?dir=configs/nix
   Locked URL:    http://localhost:3000/api/v1/repos/jade/cats/archive/804ede182b6b66469b23ea4d21eece52766b7a06.tar.gz?dir=configs
   /nix&narHash=sha256-yP7KkDVfuixZzs0fsqhSETXFC0y8m6nmPLw2GrAMxKQ%3D
   Description:   Computers with the nixos
   Path:          /nix/store/s856c6yqghyan4v0zy6jj19ksv0q22nx-source
   Revision:      804ede182b6b66469b23ea4d21eece52766b7a06
   Last modified: 2024-05-02 00:48:32
   
   For details on the header value, see:
   https://github.com/nixos/nix/blob/56763ff918eb308db23080e560ed2ea3e00c80a7/doc/manual/src/protocols/tarball-fetcher.md
   
   Update routers/api/v1/repo/file.go
   
   Co-authored-by: wxiaoguang <wxiaoguang@gmail.com>
   
   Update routers/web/repo/repo.go
   
   Co-authored-by: wxiaoguang <wxiaoguang@gmail.com>
   
   Update tests/integration/api_repo_archive_test.go
   
   Co-authored-by: wxiaoguang <wxiaoguang@gmail.com>

   

   2 people authored and Mic92 committed May 28, 2024
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