nixos-config/home/terminal/software/git.nix

{
  config,
  pkgs,
  ...
}: let
  configFile = "git/config";
  ignoreFile = "git/ignore";
  hooksDir = "git/hooks";
  toINI = (pkgs.formats.ini {}).generate;

  # Hook that auto-generates a Conventional Commit message from staged diff
  prepareCommitMsg = pkgs.writeShellScript "prepare-commit-msg" ''
        # Only run if there are staged changes
        if git diff --cached --quiet 2>/dev/null; then
          exit 0
        fi

        echo "Generating commit message from staged changes..." >&2

        # Generate Conventional Commit message using opencode run
        git diff --cached | timeout 30 ${pkgs.opencode}/bin/opencode run \
          -m opencode/north-mini-code-free \
          "You are an expert software engineer writing professional Git commit messages.

    Create a clean Conventional Commit for the provided diff.

    Rules:
    - Format: type(optional scope): imperative description
    - Allowed types: feat, fix, docs, style, refactor, perf, test, build, ci, chore
    - First line: maximum 72 characters, starts with capital letter, imperative present tense
    - If relevant, add a blank line followed by a short body explaining the motivation and key changes
    - Be concise and professional. No emojis, no markdown.

    Output ONLY the commit message. Do not add any extra text, quotes, or explanations." \
          2>/dev/null > "$1"

        # Fallback if generation failed or timed out
        if [ ! -s "$1" ]; then
          echo "chore: auto-generated commit message" > "$1"
        fi
  '';
in {
  users.users.someone.packages = with pkgs; [
    git
    delta
    gnupg
    git-lfs
    peco
  ];

  xdg.configFile."${configFile}".source = toINI "config" {
    alias = {
      af = "!git add $(git ls-files -m -o --exclude-standard | fzf -m)";
      br = "branch";
      ca = "commit -am";
      co = "checkout";
      d = "diff";
      df = "!git hist | peco | awk '{print $2}' | xargs -I {} git diff {}^ {}";
      "edit-unmerged" = "!f() { git ls-files --unmerged | cut -f2 | sort -u ; }; hx `f`";
      fuck = "commit --amend -m";
      hist = "log --pretty=format:\"%Cgreen%h %Creset%cd %Cblue[%cn] %Creset%s%C(yellow)%d%C(reset)\" --graph --date=relative --decorate --all";
      llog = "log --graph --name-status --pretty=format:\"%C(red)%h %C(reset)(%cd) %C(green)%an %Creset%s %C(yellow)%d%Creset\" --date=relative";
      pl = "!git pull origin $(git rev-parse --abbrev-ref HEAD)";
      ps = "!git push origin $(git rev-parse --abbrev-ref HEAD)";
      st = "status";
    };
    commit = {
      gpgSign = "true";
    };
    core = {
      editor = "nvim";
      hooksPath = "${config.xdg.configHome}/git/hooks";
      pager = "${pkgs.delta}/bin/delta";
      whitespace = "fix,-indent-with-non-tab,trailing-space,cr-at-eol";
      excludesFile = "${config.xdg.configHome}/${ignoreFile}";
    };
    delta = {
      features = "unobtrusive-line-numbers decorations";
      navigate = "true";
      "side-by-side" = "true";
      "true-color" = "never";
    };
    "delta-decorations" = {
      "commit-decoration-style" = "bold grey box ul";
      "file-decoration-style" = "ul";
      "file-style" = "bold blue";
      "hunk-header-decoration-style" = "box";
    };
    "delta-unobtrusive-line-numbers" = {
      "line-numbers" = "true";
      "line-numbers-left-format" = "{nm:>4}│";
      "line-numbers-left-style" = "grey";
      "line-numbers-right-format" = "{np:>4}│";
      "line-numbers-right-style" = "grey";
    };
    diff = {
      colorMoved = "default";
    };
    "filter-lfs" = {
      clean = "git-lfs clean -- %f";
      process = "git-lfs filter-process";
      required = "true";
      smudge = "git-lfs smudge -- %f";
    };
    gpg = {
      format = "openpgp";
    };
    "gpg-openpgp" = {
      program = "${pkgs.gnupg}/bin/gpg";
    };
    init = {
      defaultBranch = "main";
    };
    interactive = {
      diffFilter = "${pkgs.delta}/bin/delta --color-only";
    };
    merge = {
      conflictstyle = "diff3";
      stat = "true";
    };
    pull = {
      ff = "only";
    };
    push = {
      autoSetupRemote = "true";
      default = "current";
    };
    rebase = {
      autoSquash = "true";
      autoStash = "true";
    };
    repack = {
      usedeltabaseoffset = "true";
    };
    rerere = {
      autoupdate = "true";
      enabled = "true";
    };
    tag = {
      gpgSign = "true";
    };
    user = {
      email = "jory@severijnse.eu";
      name = "Jory Severijnse";
      signingKey = "0F8835ED078FDBF2";
    };
  };

  xdg.configFile."${ignoreFile}".text = ''
    *~
    *.swp
    *result*
    .direnv
    node_modules
    .opencode/
    .gemini/
    GEMINI.md
    AGENTS.md
    .sisyphus
  '';

  xdg.configFile."${hooksDir}/prepare-commit-msg".source = prepareCommitMsg;
}