From 7baad324bf8604622a36baf485d48c8e4f473cc0 Mon Sep 17 00:00:00 2001
From: Taiki Endo <te316e89@gmail.com>
Date: Wed, 7 Sep 2022 20:18:30 +0900
Subject: [PATCH] Add ref input option

Co-authored-by: kirrg001 <katharina.irrgang@instana.com>
---
 CHANGELOG.md | 2 ++
 README.md    | 1 +
 action.yml   | 6 ++++++
 main.sh      | 7 ++++---
 4 files changed, 13 insertions(+), 3 deletions(-)

diff --git a/CHANGELOG.md b/CHANGELOG.md
index ba7d447..f1719f2 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -12,6 +12,8 @@ Note: In this file, do not use the hard wrap in the middle of a sentence for com
 
 - Add `token` input option to use the specified token instead of `GITHUB_TOKEN` environment variable.
 
+- Add `ref` input option to use the specified tag ref instead of `GITHUB_REF` environment variable.
+
 - Update `parse-changelog` to 0.5.1. This includes a bug fix and performance improvements.
 
 ## [1.5.0] - 2022-02-17
diff --git a/README.md b/README.md
index f1717e2..c769643 100644
--- a/README.md
+++ b/README.md
@@ -46,6 +46,7 @@ Currently, changelog format and supported tag names have the following rule:
 | draft     | false     | Create a draft release (`true` or `false`)                                  | Boolean | `false` |
 | branch    | false     | Reject releases from commits not contained in branches that match the specified pattern (regular expression) | String  |         |
 | prefix    | false     | An optional pattern that matches a prefix for the release tag, before the version number (see [action.yml](action.yml) for more) | String |         |
+| ref       | false     | Fully-formed tag ref for this release (see [action.yml](action.yml) for more) | String |         |
 
 [^1]: Required one of `token` input option or `GITHUB_TOKEN` environment variable.
 
diff --git a/action.yml b/action.yml
index be71260..6867054 100644
--- a/action.yml
+++ b/action.yml
@@ -42,6 +42,12 @@ inputs:
 
       If not set this option, the GITHUB_TOKEN environment variable will be used.
     required: false
+  ref:
+    description: >
+      Fully-formed tag ref for this release.
+
+      If not set this option, the GITHUB_REF environment variable (automatically set by GitHub Actions) will be used.
+    required: false
 
 outputs:
   computed-prefix:
diff --git a/main.sh b/main.sh
index e1f31a5..08a4cbe 100755
--- a/main.sh
+++ b/main.sh
@@ -23,15 +23,16 @@ draft="${INPUT_DRAFT:-}"
 branch="${INPUT_BRANCH:-}"
 prefix="${INPUT_PREFIX:-}"
 token="${INPUT_TOKEN:-"${GITHUB_TOKEN:-}"}"
+ref="${INPUT_REF:-"${GITHUB_REF:-}"}"
 
 if [[ -z "${token:-}" ]]; then
     bail "neither GITHUB_TOKEN environment variable nor 'token' input option is set."
 fi
 
-if [[ "${GITHUB_REF:?}" != "refs/tags/"* ]]; then
-    bail "this action can only be used on 'push' event for 'tags' (GITHUB_REF should start with 'refs/tags/': '${GITHUB_REF}')"
+if [[ "${ref:?}" != "refs/tags/"* ]]; then
+    bail "tag ref should start with 'refs/tags/': '${ref}'"
 fi
-tag="${GITHUB_REF#refs/tags/}"
+tag="${ref#refs/tags/}"
 
 release_options=("${tag}")
 parse_changelog_options=()