mirror of
https://github.com/privatevoid-net/nix-super.git
synced 2024-11-16 03:06:17 +02:00
eb7d7780b1
This is needed to avoid this https://github.com/mesonbuild/meson/issues/13774 when we go back to making our subproject directory `src`.
70 lines
2.7 KiB
Markdown
70 lines
2.7 KiB
Markdown
# Lockable HTTP Tarball Protocol
|
|
|
|
Tarball flakes can be served as regular tarballs via HTTP or the file
|
|
system (for `file://` URLs). Unless the server implements the Lockable
|
|
HTTP Tarball protocol, it is the responsibility of the user to make sure that
|
|
the URL always produces the same tarball contents.
|
|
|
|
An HTTP server can return an "immutable" HTTP URL appropriate for lock
|
|
files. This allows users to specify a tarball flake input in
|
|
`flake.nix` that requests the latest version of a flake
|
|
(e.g. `https://example.org/hello/latest.tar.gz`), while `flake.lock`
|
|
will record a URL whose contents will not change
|
|
(e.g. `https://example.org/hello/<revision>.tar.gz`). To do so, the
|
|
server must return an [HTTP `Link` header](https://developer.mozilla.org/en-US/docs/Web/HTTP/Headers/Link) with the `rel` attribute set to
|
|
`immutable`, as follows:
|
|
|
|
```
|
|
Link: <flakeref>; rel="immutable"
|
|
```
|
|
|
|
(Note the required `<` and `>` characters around *flakeref*.)
|
|
|
|
*flakeref* must be a tarball flakeref. It can contain the tarball flake attributes
|
|
`narHash`, `rev`, `revCount` and `lastModified`. If `narHash` is included, its
|
|
value must be the [NAR hash][Nix Archive] of the unpacked tarball (as computed via
|
|
`nix hash path`). Nix checks the contents of the returned tarball
|
|
against the `narHash` attribute. The `rev` and `revCount` attributes
|
|
are useful when the tarball flake is a mirror of a fetcher type that
|
|
has those attributes, such as Git or GitHub. They are not checked by
|
|
Nix.
|
|
|
|
```
|
|
Link: <https://example.org/hello/442793d9ec0584f6a6e82fa253850c8085bb150a.tar.gz
|
|
?rev=442793d9ec0584f6a6e82fa253850c8085bb150a
|
|
&revCount=835
|
|
&narHash=sha256-GUm8Uh/U74zFCwkvt9Mri4DSM%2BmHj3tYhXUkYpiv31M%3D>; rel="immutable"
|
|
```
|
|
|
|
(The linebreaks in this example are for clarity and must not be included in the actual response.)
|
|
|
|
For tarball flakes, the value of the `lastModified` flake attribute is
|
|
defined as the timestamp of the newest file inside the tarball.
|
|
|
|
## Gitea and Forgejo support
|
|
|
|
This protocol is supported by Gitea since v1.22.1 and by Forgejo since v7.0.4/v8.0.0 and can be used with the following flake URL schema:
|
|
|
|
```
|
|
https://<domain name>/<owner>/<repo>/archive/<reference or revison>.tar.gz
|
|
```
|
|
|
|
> **Example**
|
|
>
|
|
>
|
|
> ```nix
|
|
> # flake.nix
|
|
> {
|
|
> inputs = {
|
|
> foo.url = "https://gitea.example.org/some-person/some-flake/archive/main.tar.gz";
|
|
> bar.url = "https://gitea.example.org/some-other-person/other-flake/archive/442793d9ec0584f6a6e82fa253850c8085bb150a.tar.gz";
|
|
> qux = {
|
|
> url = "https://forgejo.example.org/another-person/some-non-flake-repo/archive/development.tar.gz";
|
|
> flake = false;
|
|
> };
|
|
> };
|
|
> outputs = { foo, bar, qux }: { /* ... */ };
|
|
> }
|
|
```
|
|
|
|
[Nix Archive]: @docroot@/store/file-system-object/content-address.md#serial-nix-archive
|