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-rw-r--r--home-manager/git/default.nix141
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+{
+  config,
+  pkgs,
+  ...
+}: let
+  gitTemplateFile =
+    pkgs.writeText "git_template.git"
+    ''
+      # Title: Summary, imperative, start upper case, don't end with a period
+      # If applied, this commit will <your Title>
+
+      # Body: Explain *what* and *why* (not *how*).
+
+
+      # BREAKING CHANGE: <description>
+      # Fixes: #
+      # Refs: #
+      # Co-authored-by: <name> <email>
+
+
+
+      # Convention Commits (https://www.conventionalcommits.org/en/v1.0.0/):
+      #  feat: [Features] -> MINOR version bump
+      #      A new feature
+      #
+      #  fix: [Bug Fixes] -> PATCH version bump
+      #      A bug fix
+      #
+      #  append '!' after the type/scope: [Breaking Change] -> MAJOR version bump
+      #    A breaking API change
+      #
+      #  docs: [Documentation]
+      #      Documentation only changes
+      #
+      #  style: [Styles]
+      #      Changes that do not affect the meaning of the code
+      #      (white-space, formatting, missing semi-colons, etc)
+      #
+      #  refactor: [Code Refactoring]
+      #      A code change that neither fixes a bug nor adds a feature
+      #
+      #  perf: [Performance Improvements] -> PATCH version bump
+      #      A code change that improves performance
+      #
+      #  test: [Tests]
+      #      Adding missing tests or correcting existing tests
+      #
+      #  build: [Builds] -> PATCH version bump
+      #      Changes that affect the build system or external dependencies
+      #      (example scopes: gulp, broccoli, npm)
+      #
+      #  ci: [Continuous Integrations]
+      #      Changes to our CI configuration files and scripts
+      #      (example scopes: Travis, Circle, BrowserStack, SauceLabs)
+      #
+      #  chore: [Chores]
+      #      Other changes that don't modify src or test files
+      #
+      #  reverts: [Reverts]
+      #      Reverts a previous commit
+
+      # How to Write a Git Commit Message:
+      # [https://chris.beams.io/posts/git-commit/] -> https://cbea.ms/git-commit/
+      #
+      # 1. Separate subject from body with a blank line
+      # 2. Limit the subject line to 50 characters
+      # 3. Capitalize the subject line
+      # 4. Do not end the subject line with a period
+      # 5. Use the imperative mood in the subject line
+      # 6. Wrap the body at 72 characters
+      # 7. Use the body to explain *what* and *why* vs. *how*
+    '';
+
+  gitConfig = {
+    init = {
+      defaultBranch = "prime";
+    };
+    credential = {
+      helper = "cache --timeout 43200";
+    };
+    user = {
+      email = "ene@sils.li";
+      name = "ene";
+    };
+    help = {
+      autocorrect = 5;
+    };
+    commit = {
+      template = "${gitTemplateFile}";
+    };
+  };
+in {
+  home-manager.programs.git = {
+    enable = true;
+    #package = pkgs.gitAndTools.gitFull; # TODO for git send-email support
+    aliases = {
+      st = "status";
+
+      ## Logging:
+      ls = "log --max-count=10 --color --format=format:'%C(bold red)%h%C(reset) %C(dim bold blue)%s%C(reset) %C(dim white)[%aN]' ";
+
+      # https://stackoverflow.com/a/61487052
+      lg = "lg1";
+      lg1 = "lg1-specific --all";
+      lg2 = "lg2-specific --all";
+      lg3 = "lg3-specific --all";
+
+      lg1-specific = "log --graph --abbrev-commit --decorate \
+                      --format=format:'%C(bold blue)%h%C(reset) - %C(bold green)(%ar)%C(reset) %C(white)%s%C(reset) %C(dim white)- %an%C(reset)%C(auto)%d%C(reset)'";
+
+      lg2-specific = "log --graph --abbrev-commit --decorate \
+                      --format=format:'%C(bold blue)%h%C(reset) - %C(bold cyan)%aD%C(reset) %C(bold green)(%ar)%C(reset)%C(auto)%d%C(reset)%n''          %C(white)%s%C(reset) %C(dim white)- %an%C(reset)'";
+
+      lg3-specific = "log --graph --abbrev-commit --decorate \
+                      --format=format:'%C(bold blue)%h%C(reset)\
+                      - %C(bold cyan)%aD%C(reset) %C(bold green)(%ar)%C(reset)\
+                      %C(bold cyan)(committed: %cD)%C(reset) %C(auto)%d%C(reset)%n\
+                      ''          %C(white)%s%C(reset)%n''   \
+                      %C(dim white)- %an <%ae> %C(reset) %C(dim white)(committer: %cn <%ce>)%C(reset)'";
+    };
+    extraConfig = gitConfig;
+    delta = {
+      enable = true;
+      options = {
+        decorations = {
+          commit-decoration-style = "bold yellow box ul";
+          file-decoration-style = "none";
+          file-style = "bold yellow ul";
+        };
+        features = "decorations";
+        whitespace-error-style = "22 reverse";
+      };
+    };
+    signing = {
+      key = null; #let gpg2 decide, based on the author
+      signByDefault = true;
+    };
+  };
+}
+# vim: ts=2
+