feat(args): add --tag-pattern argument

.github/fixtures/test-custom-tag-pattern/cliff.toml

@@ -0,0 +1,34 @@
+[changelog]
+# 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="alpha-") }}] - {{ timestamp | date(format="%Y-%m-%d") }}
+{% else %}\
+    ## [unreleased]
+{% endif %}\
+{% for group, commits in commits | group_by(attribute="group") %}
+    ### {{ group | upper_first }}
+    {% for commit in commits %}
+        - {{ commit.message | upper_first }}\
+    {% endfor %}
+{% endfor %}\n
+"""
+# template for the changelog footer
+footer = """
+<!-- generated by git-cliff -->
+"""
+# remove the leading and trailing whitespace from the templates
+trim = true
+
+[git]
+# regex for parsing and grouping commits
+commit_parsers = [
+    { message = "^feat", group = "Features", default_scope = "app" },
+    { message = "^fix", group = "Bug Fixes", scope = "cli" },
+]

.github/fixtures/test-custom-tag-pattern/commit.sh

@@ -0,0 +1,13 @@
+#!/usr/bin/env bash
+set -e
+
+GIT_COMMITTER_DATE="2022-04-06 01:25:08" git commit --allow-empty -m "Initial commit"
+GIT_COMMITTER_DATE="2022-04-06 01:25:09" git commit --allow-empty -m "feat: add feature 1"
+git tag beta-0.1.0
+GIT_COMMITTER_DATE="2022-04-06 01:25:10" git commit --allow-empty -m "fix: fix feature 1"
+git tag alpha-0.1.0
+GIT_COMMITTER_DATE="2022-04-06 01:25:11" git commit --allow-empty -m "feat(gui): add feature 2"
+git tag beta-0.2.0
+GIT_COMMITTER_DATE="2022-04-06 01:25:12" git commit --allow-empty -m "fix(gui): fix feature 2"
+git tag alpha-0.2.0
+GIT_COMMITTER_DATE="2022-04-06 01:25:13" git commit --allow-empty -m "test: add tests"

.github/fixtures/test-custom-tag-pattern/expected.md

@@ -0,0 +1,31 @@
+# Changelog
+
+All notable changes to this project will be documented in this file.
+
+## [unreleased]
+
+### Test
+
+- Add tests
+
+## [0.2.0] - 2022-04-06
+
+### Bug Fixes
+
+- Fix feature 2
+
+### Features
+
+- Add feature 2
+
+## [0.1.0] - 2022-04-06
+
+### Bug Fixes
+
+- Fix feature 1
+
+### Features
+
+- Add feature 1
+
+<!-- generated by git-cliff -->

.github/workflows/test-fixtures.yml

@@ -65,6 +65,8 @@ jobs:
             command: --skip-commit ad27b43e8032671afb4809a1a3ecf12f45c60e0e
           - fixtures-name: test-no-exec
             command: --no-exec
+          - fixtures-name: test-custom-tag-pattern
+            command: --tag-pattern "alpha.*"
     steps:
       - name: Checkout
         uses: actions/checkout@v4

git-cliff/src/args.rs

@@ -18,6 +18,7 @@ use git_cliff_core::{
 	DEFAULT_OUTPUT,
 };
 use glob::Pattern;
+use regex::Regex;
 use secrecy::SecretString;
 use std::path::PathBuf;
 
@@ -130,6 +131,9 @@ pub struct Opt {
 		num_args(1..)
 	)]
 	pub exclude_path:   Option<Vec<Pattern>>,
+	/// Sets the regex for matching git tags.
+	#[arg(long, env = "GIT_CLIFF_TAG_PATTERN", value_name = "PATTERN")]
+	pub tag_pattern:    Option<Regex>,
 	/// Sets custom commit messages to include in the changelog.
 	#[arg(
 		long,

git-cliff/src/lib.rs

@@ -417,6 +417,9 @@ pub fn run(mut args: Opt) -> Result<()> {
 		}
 	}
 	config.git.skip_tags = config.git.skip_tags.filter(|r| !r.as_str().is_empty());
+	if args.tag_pattern.is_some() {
+		config.git.tag_pattern = args.tag_pattern.clone();
+	}
 
 	// Process the repositories.
 	let repositories = args.repository.clone().unwrap_or(vec![env::current_dir()?]);

website/docs/configuration/git.md

@@ -183,6 +183,8 @@ If set to `true`, commits that are not matched by [`commit_parsers`](#commit_par
 
 A regular expression for matching the git tags.
 
+This value can be also overridden with using the `--tag-pattern` argument.
+
 ### skip_tags
 
 A regex for skip processing the matched tags.

website/docs/usage/args.md

@@ -1,6 +1,7 @@
 ---
 sidebar_position: 1
 ---
+
 # Command-line Arguments
 
 ```
@@ -32,6 +33,7 @@ git-cliff [FLAGS] [OPTIONS] [--] [RANGE]
 -r, --repository <PATH>...       Sets the git repository [env: GIT_CLIFF_REPOSITORY=]
     --include-path <PATTERN>...  Sets the path to include related commits [env: GIT_CLIFF_INCLUDE_PATH=]
     --exclude-path <PATTERN>...  Sets the path to exclude related commits [env: GIT_CLIFF_EXCLUDE_PATH=]
+    --tag-pattern <PATTERN>      Sets the regex for matching git tags [env: GIT_CLIFF_TAG_PATTERN=]
     --with-commit <MSG>...       Sets custom commit messages to include in the changelog [env: GIT_CLIFF_WITH_COMMIT=]
     --skip-commit <SHA1>...      Sets commits that will be skipped in the changelog [env: GIT_CLIFF_SKIP_COMMIT=]
 -p, --prepend <PATH>             Prepends entries to the given changelog file [env: GIT_CLIFF_PREPEND=]