[INTT-48] Add git-cliff config and fast-forward workflow

nix/general/default.nix

@@ -8,7 +8,9 @@ importingFlake: {
   imports = [
     ./action-versions.nix
     (importApply ./devshell.nix args)
+    (importApply ./git-cliff.nix args)
     (importApply ./pre-commit-hooks.nix args)
+    ./ff-merge_workflow.nix
   ];
 
   # Install all defined GitHub workflows

nix/general/devshell.nix

@@ -2,7 +2,9 @@ importingFlake: {
   perSystem =
     { lib, pkgs, ... }:
     {
-      devshells.general.packages = lib.attrValues { inherit (pkgs) prek; };
+      devshells.general.packages = lib.attrValues {
+        inherit (pkgs) prek git-cliff;
+      };
 
       filegen.settings.files = [
         {

nix/general/ff-merge_workflow.nix

@@ -0,0 +1,43 @@
+{ config, ... }:
+let
+  allowed-actions = config.famedly.standards.allowed-action-versions;
+in
+{
+  perSystem =
+    { ... }:
+    {
+      githubActions.workflows.ff-merge = {
+        name = "fast-forward";
+
+        on.issueComment.types = [
+          "created"
+          "edited"
+        ];
+
+        jobs.fast-forward = {
+          if_ = "\${{ contains(github.event.comment.body, '/fast-forward') && github.event.issue.pull_request }}";
+
+          runsOn = "ubuntu-latest";
+
+          permissions = {
+            contents = "write";
+            pull-requests = "write";
+            issues = "write";
+          };
+
+          steps = [
+            {
+              name = "Fast forwarding";
+              uses = allowed-actions."sequoia-pgp/fast-forward".uses;
+              with_ = {
+                merge = true;
+                # Only post comments about fast-forwarding if
+                # there is an error.
+                comment = "on-error";
+              };
+            }
+          ];
+        };
+      };
+    };
+}

nix/general/git-cliff.nix

@@ -0,0 +1,14 @@
+importingFlake: {
+  perSystem =
+    { ... }:
+    {
+      filegen.settings.files = [
+        {
+          type = "copy";
+          target = "./.config/cliff.toml";
+          source = ../../standards/cliff.toml;
+          clobber = true;
+        }
+      ];
+    };
+}

standards/allowed-github-actions.toml

@@ -9,3 +9,7 @@ ref = "51f3067b56fe8ae331890c77d4e454f6d60615ff"
 ["cachix/cachix-action"]
 rev = "v17"
 ref = "1eb2ef646ac0255473d23a5907ad7b04ce94065c"
+
+["sequoia-pgp/fast-forward"]
+rev = "v1.0.0"
+ref = "ea7628bedcb0b0b96e94383ada458d812fca4979"

standards/cliff.toml

@@ -0,0 +1,83 @@
+# git-cliff ~ default configuration file
+# https://git-cliff.org/docs/configuration
+#
+# Lines starting with "#" are comments.
+# Configuration options are organized into tables and keys.
+# See documentation for more information on available options.
+
+[changelog]
+# template for the changelog header
+header = """
+# Changelog\n
+All notable changes to this project will be documented in this file.\n
+"""
+# template for the changelog body
+# https://keats.github.io/tera/docs/#introduction
+body = """
+{% if version %}\
+    ## [{{ version | trim_start_matches(pat="v") }}] - {{ timestamp | date(format="%Y-%m-%d") }}
+{% else %}\
+    ## [unreleased]
+{% endif %}\
+{% for group, commits in commits | group_by(attribute="group") %}
+    ### {{ group | striptags | trim | upper_first }}
+    {% for commit in commits %}
+        - {% if commit.scope %}*({{ commit.scope }})* {% endif %}\
+            {% if commit.breaking %}[**breaking**] {% endif %}\
+            {{ commit.message | upper_first }}\
+    {% endfor %}
+{% endfor %}\n
+"""
+# template for the changelog footer
+footer = """
+<!-- generated by git-cliff -->
+"""
+# remove the leading and trailing s
+trim = true
+# postprocessors
+postprocessors = [
+  # { pattern = '<REPO>', replace = "https://github.com/orhun/git-cliff" }, # replace repository URL
+]
+# render body even when there are no releases to process
+# render_always = true
+# output file path
+# output = "test.md"
+
+[git]
+# parse the commits based on https://www.conventionalcommits.org
+conventional_commits = true
+# filter out the commits that are not conventional
+filter_unconventional = true
+# process each line of a commit as an individual commit
+split_commits = false
+# regex for preprocessing the commit messages
+commit_preprocessors = [
+  # Replace issue numbers
+  #{ pattern = '\((\w+\s)?#([0-9]+)\)', replace = "([#${2}](<REPO>/issues/${2}))"},
+  # Check spelling of the commit with https://github.com/crate-ci/typos
+  # If the spelling is incorrect, it will be automatically fixed.
+  #{ pattern = '.*', replace_command = 'typos --write-changes -' },
+]
+# regex for parsing and grouping commits
+commit_parsers = [
+  { message = "^feat", group = "<!-- 0 -->Features" },
+  { message = "^fix", group = "<!-- 1 -->Bug Fixes" },
+  { message = "^doc", group = "<!-- 3 -->Documentation" },
+  { message = "^perf", group = "<!-- 4 -->Performance" },
+  { message = "^refactor", group = "<!-- 2 -->Refactor" },
+  { message = "^style", group = "<!-- 5 -->Styling" },
+  { message = "^test", group = "<!-- 6 -->Testing" },
+  { message = "^chore\\(release\\): prepare for", skip = true },
+  { message = "^chore\\(deps.*\\)", skip = true },
+  { message = "^chore\\(pr\\)", skip = true },
+  { message = "^chore\\(pull\\)", skip = true },
+  { message = "^chore|^ci", group = "<!-- 7 -->Miscellaneous Tasks" },
+  { body = ".*security", group = "<!-- 8 -->Security" },
+  { message = "^revert", group = "<!-- 9 -->Revert" },
+]
+# filter out the commits that are not matched by commit parsers
+filter_commits = false
+# sort the tags topologically
+topo_order = false
+# sort the commits inside sections by oldest/newest order
+sort_commits = "oldest"