System/home-manager/common/programs/git.nix

{ config, lib, pkgs, inputs, ... }:
with lib; {
  config = mkMerge [
    (mkIf (config.nathan.programs.util.git.enable
      && config.nathan.programs.util.git.gpgSign) {
        programs.git.signing = {
          key = lib.mkDefault "B7A40A5D78C08885";
          signByDefault = lib.mkDefault config.nathan.programs.util.git.gpgSign;
        };
      })
    (mkIf (config.nathan.programs.util.git.enable
      && config.nathan.programs.util.git.sshSign) {
        home.file.allowedSigners = {
          target = ".ssh/allowed_signers";
          text = (import ../../../info/ssh-keys.nix).allowedSigners;
        };
        programs.git = {
          extraConfig = {
            commit.gpgsign = true;
            gpg.format = "ssh";
            user.signingkey = "~/.ssh/id_ed25519.pub";
            gpg.ssh.allowedSignersFile = "~/.ssh/allowed_signers";
          };
        };
      })
    (mkIf config.nathan.programs.util.git.enable {
      # Git adjacent packages
      home.packages = [
        inputs.nixpkgs-unstable.legacyPackages."${pkgs.system}".git-branchless
      ];
      #########################
      ## Git configuration
      #########################
      programs.git = {
        enable = true;
        package = pkgs.gitAndTools.gitFull;
        userName = lib.mkDefault "Nathan McCarty";
        userEmail = lib.mkDefault "nathan@mccarty.io";
        ignores = [
          "**/*~"
          "*~"
          "*_archive"
          "/auto/"
          "auto-save-list"
          ".cask/"
          ".dir-locals.el"
          "dist/"
          "**/.DS_Store"
          "*.elc"
          "/elpa/"
          "/.emacs.desktop"
          "/.emacs.desktop.lock"
          "/eshell/history"
          "/eshell/lastdir"
          "flycheck_*.el"
          "*_flymake.*"
          "/network-security.data"
          ".org-id-locations"
          ".persp"
          ".projectile"
          "*.rel"
          "/server/"
          "tramp"
          "\\#*\\#"
        ];
        delta.enable = true;
        lfs.enable = true;
        extraConfig = {
          init = { defaultBranch = "trunk"; };
          log = {
            showSignature = true;
            abbrevCommit = true;
            follow = true;
            decorate = false;
          };
          rerere = {
            enable = true;
            autoupdate = true;
          };
          merge = {
            ff = "only";
            conflictstyle = "diff3";
          };
          push = {
            default = "simple";
            followTags = true;
          };
          pull = { rebase = true; };
          status = { showUntrackedFiles = "all"; };
          transfer = { fsckobjects = true; };
          color = { ui = "auto"; };
          diff = {
            mnemonicPrefix = true;
            renames = true;
            wordRegex = ".";
            submodule = "log";
          };
          # credential = { helper = "cache"; };
          # Disable annoying safe directory nonsense
          safe = { directory = "*"; };
        };
      };
    })
  ];
}