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# nixos-config - My current NixOS configuration
#
# Copyright (C) 2025 Benedikt Peetz <benedikt.peetz@b-peetz.de>
# SPDX-License-Identifier: GPL-3.0-or-later
#
# This file is part of my nixos-config.
#
# You should have received a copy of the License along with this program.
# If not, see <https://www.gnu.org/licenses/gpl-3.0.txt>.
{
  lib,
  pkgs,
  config,
  ...
}: let
  cfg = config.soispha.programs.git;

  gitIgnoreFile = ./git_ignore.git;
  gitTemplateFile = ./git_template.git;
in {
  options.soispha.programs.git = {
    enable = lib.mkEnableOption "an opinionated git config";
    defaultBranchName = lib.mkOption {
      type = lib.types.str;
      description = "The name of the default branch.";
      default = "prime";
    };
  };

  config = lib.mkIf cfg.enable {
    home-manager.users.soispha = {
      programs.delta = {
        enable = true;
        enableGitIntegration = true;
        options = {
          decorations = {
            commit-decoration-style = "bold yellow box ul";
            file-decoration-style = "none";
            file-style = "bold yellow ul";
          };
          keep-plus-minus-markers = true;
          features = "decorations";
          whitespace-error-style = "22 reverse";
        };
      };

      # Add my custom git-scripts
      home.packages = [
        pkgs.git-edit-index # Allows you to edit the indexed version of a file
        pkgs.git-cm # A wrapper that re-adds the last commit's subject
        pkgs.git-cgit # Allows fast cgit settings setup
        pkgs.stamp # Add a license header to a file
      ];

      programs.git = {
        enable = true;

        signing.format = "openpgp";

        settings = {
          alias = import ./aliases.nix {
            inherit lib;
            inherit (cfg) defaultBranchName;
          };

          core = {
            excludesFile = "${gitIgnoreFile}";
          };
          rebase = {
            autoStash = true;
            autoSquash = true;
          };
          init = {
            defaultBranch = cfg.defaultBranchName;
          };
          user = {
            name = "Benedikt Peetz";
            email = "benedikt.peetz@b-peetz.de";
            # signingKey = "[is down below]";
          };
          help = {
            autocorrect = 5;
          };
          push = {
            gpgSign = "if-asked";
          };
          commit = {
            template = "${gitTemplateFile}";
          };
          diff = {
            colorMoved = "default";
            # Usually leads to better results
            algorithm = "patience";
            bin = {
              textconv = "hexdump -v -C";
            };
          };
          # Makes it a bit more readable
          blame = {
            coloring = "repeatedLines";
            markIgnoredLines = true;
            markUnblamables = true;
          };
          merge = {
            conflictstyle = "zdiff3";
          };
          url = {
            "git@codeberg.org:" = {
              insteadOf = "@cb:";
            };
            "https://codeberg.org/" = {
              insteadOf = "cb://";
            };

            "git@github.com:" = {
              insteadOf = "@gh:";
            };
            "https://github.com/" = {
              insteadOf = "gh://";
            };

            "git@gitlab.com:" = {
              insteadOf = "@gl:";
            };
            "https://gitlab.com/" = {
              insteadOf = "gl://";
            };
          };
        };

        signing = {
          key = "8321ED3A8DB999A51F3BF80FF2682914EA42DE26";
          signByDefault = true;
        };
      };
    };
  };
}