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path: root/modules/nixfiles/git.nix
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{
  config,
  lib,
  inputs,
  pkgs,
  ...
}:
with lib; let
  cfg = config.nixfiles.modules.git;
in {
  options.nixfiles.modules.git = {
    client.enable = mkEnableOption "Git client";
    server = {
      enable = mkEnableOption "Git server";

      domain = mkOption {
        description = "Domain name sans protocol scheme.";
        type = with types; nullOr str;
        default = "git.${config.networking.domain}";
      };

      package = mkOption {
        description = "Package.";
        type = types.package;
        default = pkgs.cgit-pink;
      };
    };
  };

  config = mkMerge [
    (mkIf cfg.client.enable {
      secrets = {
        glab-cli-config = {
          file = "${inputs.self}/secrets/glab-cli-config";
          path = "${config.dirs.config}/glab-cli/config.yml";
          owner = my.username;
          inherit (config.my) group;
        };
        gh-hosts = {
          file = "${inputs.self}/secrets/gh-hosts";
          path = "${config.dirs.config}/gh/hosts.yml";
          owner = my.username;
          inherit (config.my) group;
        };
        hut = {
          file = "${inputs.self}/secrets/hut";
          path = "${config.dirs.config}/hut/config";
          owner = my.username;
          inherit (config.my) group;
        };
      };

      hm = {
        home.packages = with pkgs; [glab hut];

        programs = {
          git = {
            enable = true;

            package = pkgs.git.override {
              doInstallCheck = false;
              pythonSupport = false;
              sendEmailSupport = true;
              withLibsecret = false;
              withSsh = true;
            };

            userName = my.fullname;
            userEmail = my.email;
            signing = {
              inherit (my.pgp) key;
              signByDefault = true;
            };

            extraConfig =
              {
                advice.detachedHead = false;
                color.ui = true;
                core.whitespace = "trailing-space";
                diff = {
                  mnemonicPrefix = true;
                  renames = "copies";
                  submodule = "log";
                };
                init.defaultBranch = "master";
                status.submoduleSummary = true;
                github.user = my.username;
                gitlab.user = my.username;
              }
              // mapAttrs'
              (n: v: nameValuePair ''url "git@${v}:"'' {insteadOf = "${n}:";}) {
                "alpine" = "gitlab.alpinelinux.org";
                "bitbucket" = "bitbucket.com";
                "codeberg" = "codeberg.org";
                "freedesktop" = "gitlab.freedesktop.org";
                "github" = "github.com";
                "gitlab" = "gitlab.com";
                "gnome" = "gitlab.gnome.org";
                "haskell" = "gitlab.haskell.org";
                "kde" = "invent.kde.org";
                "notabug" = "notabug.org";
                "opencode" = "opencode.net";
                "sourcehut" = "git.sr.ht";
                "videolan" = "code.videolan.org";
              };

            aliases = let
              git = "${config.hm.programs.git.package}/bin/git";
              curl = "${pkgs.curl}/bin/curl";
            in {
              fuck = "!${git} reset --hard && ${git} clean -fdx";
              gud = ''commit -m "git gud"'';
              wtc = "!${curl} -sq whatthecommit.com/index.txt | ${git} commit -F -";
            };

            # All helper tools/editor generated files should go here. This must
            # be kept relatively clean and void of any project-specific residual
            # files.
            ignores = [
              "*~"
              ".cache/clangd/"
              ".ccls-cache/"
              ".dir-locals.el"
              ".gdb_history"
              ".netrwhist"
              ".projectile"
              "[._]*.s[a-v][a-z]"
              "[._]*.sw[a-p]"
              "[._]s[a-rt-v][a-z]"
              "[._]ss[a-gi-z]"
              "[._]sw[a-p]"
              "\#*\#"
              "compile_commands*.json"
              "cscope.*"
              "vgcore.*"
            ];
          };

          gh = {
            enable = true;
            settings.git_protocol = "ssh";
          };

          bash = {
            shellAliases = {
              gl = "${pkgs.glab}/bin/glab";
              ht = "${pkgs.hut}/bin/hut";
            };
            initExtra = mkAfter ''
              _complete_alias gl __start_glab glab
              _complete_alias ht __start_hut hut
            '';
          };
        };
      };
    })
    (mkIf cfg.server.enable {
      nixfiles.modules.nginx = {
        enable = true;
        virtualHosts.${cfg.server.domain} = {
          locations = {
            "/".extraConfig = let
              cgitrc = pkgs.writeText "cgitrc" ''
                root-title=azahi’s git stuff
                root-desc=鯛も一人はうまからず

                about-filter=${cfg.server.package}/lib/cgit/filters/about-formatting.sh
                source-filter=${cfg.server.package}/lib/cgit/filters/syntax-highlighting.py
                commit-filter=${cfg.server.package}/lib/cgit/filters/commit-links.sh

                enable-git-config=1
                enable-gitweb-owner=1
                remove-suffix=1

                snapshots=tar.gz tar.bz2 zip

                readme=:README
                readme=:README.md
                readme=:README.org
                readme=:README.txt
                readme=:readme
                readme=:readme.md
                readme=:readme.org
                readme=:readme.txt

                scan-path=${config.services.gitolite.dataDir}/repositories
              '';
            in ''
              include ${config.services.nginx.package}/conf/fastcgi_params;
              fastcgi_split_path_info ^(/?)(.+)$;
              fastcgi_pass unix:${config.services.fcgiwrap.socketAddress};
              fastcgi_param SCRIPT_FILENAME ${cfg.server.package}/cgit/cgit.cgi;
              fastcgi_param CGIT_CONFIG ${cgitrc};
              fastcgi_param PATH_INFO $uri;
              fastcgi_param QUERY_STRING $args;
              fastcgi_param HTTP_HOST $server_name;
            '';
            # FIXME This breaks sources previewing for these files.
            "~* ^/(.+.(ico|css|png))$".extraConfig = ''
              alias ${cfg.server.package}/cgit/$1;
            '';
          };
        };
      };

      services = let
        user = "git";
        group = "git";
      in {
        gitolite = {
          # TODO Make the configuration purely declarative.
          enable = true;
          inherit user group;
          adminPubkey = my.ssh.key;
        };

        fcgiwrap = {
          enable = true;
          inherit user group;
        };
      };
    })
  ];
}