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# HTTP Git hosting
# Copyright (C) 2023  Nguyễn Gia Phong
#
# This file is part of loang configuration.
#
# Loang configuration is free software: you can redistribute it and/or modify
# it under the terms of the GNU Affero General Public License as published
# by the Free Software Foundation, either version 3 of the License, or
# (at your option) any later version.
#
# Loang configuration is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
# GNU Affero General Public License for more details.
#
# You should have received a copy of the GNU Affero General Public License
# along with loang configuration.  If not, see <https://www.gnu.org/licenses/>.

{ config, lib, pkgs, ... }:
let inherit (config.networking) domain;
in {
  services = let
    cgitrc = pkgs.writeText "cgitrc" ''
      about-filter=${pkgs.cgit}/lib/cgit/filters/about-formatting.sh
      css=/style.css
      favicon=/favicon.ico
      logo=/cgit.png
      source-filter=${pkgs.cgit}/lib/cgit/filters/syntax-highlighting.py
      virtual-root=/

      clone-url=${httpsClone} ${sshClone}
      enable-blame=1
      enable-git-config=1
      enable-index-links=1
      enable-index-owner=0
      readme=:README.md
      snapshots=tar.gz tar.zst
      scan-path=${scanPath}
    '';
    css = builtins.readFile "${pkgs.cgit}/cgit/cgit.css" + ''

      div#cgit {
          font-size: initial;
      }
    '';
    httpsClone = "https://trong.${domain}/$CGIT_REPO_URL";
    scanPath = "/var/lib/git";
    sshClone = "ssh://${domain}:2211${scanPath}/$CGIT_REPO_URL";
  in {
    fcgiwrap.enable = true;
    nginx.virtualHosts."trong.${domain}" = {
      enableACME = true;
      forceSSL = true;
      locations = {
        "/" = {
          root = "${pkgs.cgit}/cgit/";
          tryFiles = "$uri @cgit";
        };
        "~ ^/(cgit.png|favicon.ico|robots.txt)$".alias = "${pkgs.cgit}/cgit/$1";
        "= /style.css".alias = builtins.toFile "style.css" css;
        "@cgit".extraConfig = ''
          include ${pkgs.nginx}/conf/fastcgi_params;
          fastcgi_param CGIT_CONFIG ${cgitrc};
          fastcgi_param HTTP_HOST $server_name;
          fastcgi_param PATH_INFO $uri;
          fastcgi_param QUERY_STRING $args;
          fastcgi_param SCRIPT_FILENAME ${pkgs.cgit}/cgit/cgit.cgi;
          fastcgi_pass unix:${config.services.fcgiwrap.socketAddress};
        '';
      };
    };
  };
}