From 2c9e17c9ab79b75cb752d076d6f8b25aa84a2774 Mon Sep 17 00:00:00 2001
From: Santiago Bernhardt <santiago.bernhardt@gmail.com>
Date: Thu, 5 Jan 2023 13:32:53 +1300
Subject: [PATCH] Exit with error if default branch is not set in non prs
 (#235)

---
 entrypoint.sh | 14 ++++++++++++++
 1 file changed, 14 insertions(+)

diff --git a/entrypoint.sh b/entrypoint.sh
index 92cfa05a..ff408802 100755
--- a/entrypoint.sh
+++ b/entrypoint.sh
@@ -125,6 +125,20 @@ then
     exit 0
 fi
 
+# sanitize that the default_branch is set (via env var when running on PRs) else find it natively
+if [ -z "${default_branch}" ]
+then
+    echo "The DEFAULT_BRANCH should be autodetected when tag-action runs on on PRs else must be defined, See: https://github.com/anothrNick/github-tag-action/pull/230, since is not defined we find it natively"
+    default_branch=$(git symbolic-ref refs/remotes/origin/HEAD | sed 's@^refs/remotes/origin/@@')
+    echo "default_branch=${default_branch}"
+    # re check this
+    if [ -z "${default_branch}" ]
+    then
+        echo "::error::DEFAULT_BRANCH must not be null, something has gone wrong."
+        exit 1
+    fi
+fi
+
 # get the merge commit message looking for #bumps
 declare -A history_type=( 
     ["last"]="$(git show -s --format=%B)" \