init an unstable version since the tagged release wouldn't work on my
machine (infinite loop).
Practical tool to fetch several repositories at the same time, see their
status etc.
Disabled for darwin because of CI error "SIGILL: illegal instruction".
git-cinnabar calls into Mercurial as a library, so we make use the
same version of Python as Mercurial.
Support for Python 3 is an experimental feature in git-cinnabar, but
we unconditionally use it here because:
* Mercurial in Nixpkgs only supports Python 3.
* git-cinnabar touches a network, and for that purpose it's good to
use a version of Python that is going to get security updates.
###### Motivation for this change
Update to latest upstream version
###### Things done
* [ ] Tested using sandboxing ([nix.useSandbox](http://nixos.org/nixos/manual/options.html#opt-nix.useSandbox) on NixOS, or option `sandbox` in [`nix.conf`](http://nixos.org/nix/manual/#sec-conf-file) on non-NixOS linux)
* Built on platform(s)
* [x] NixOS
* [ ] macOS
* [ ] other Linux distributions
* [ ] Tested via one or more NixOS test(s) if existing and applicable for the change (look inside [nixos/tests](https://github.com/NixOS/nixpkgs/blob/master/nixos/tests))
* [ ] Tested compilation of all pkgs that depend on this change using `nix-shell -p nix-review --run "nix-review wip"`
* [x] Tested execution of all binary files (usually in `./result/bin/`)
* [ ] Determined the impact on package closure size (by running `nix path-info -S` before and after)
* [ ] Ensured that relevant documentation is up to date
* [x] Fits [CONTRIBUTING.md](https://github.com/NixOS/nixpkgs/blob/master/.github/CONTRIBUTING.md).
###### Notify maintainers
cc @worldofpeace @tfc @jtraue
Updates `gitea` to the latest version available[1]. Also ensured that
upgrading from `gitea-1.9` (used on NixOS 19.09) to `1.11.3` works
seamlessly.
The derivation required a few more changes this time since `gitea` uses
`npm` now to build the frontend[2]. When using the default tarball from
GitHub, we'd have to build the frontend manually. By fetching a custom
tarball published on every release, we get a prebuilt frontend
(as it was the case on previous versions) and build the backend only from
source.
Co-authored-by: kolaente <k@knt.li>
Closes #80175
[1] https://github.com/go-gitea/gitea/releases/tag/v1.11.3
[2] https://github.com/go-gitea/gitea/issues/10253
