From 677dc8c6d739b5732b9243118778fa4944421a5b Mon Sep 17 00:00:00 2001
From: Santiago Bernhardt <santiago.bernhardt@gmail.com>
Date: Sat, 6 May 2023 20:46:16 +1200
Subject: [PATCH 1/3] Node 18 and bash set +e

---
 Dockerfile    | 2 +-
 entrypoint.sh | 2 +-
 2 files changed, 2 insertions(+), 2 deletions(-)

diff --git a/Dockerfile b/Dockerfile
index b64fc5be..22fccf35 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -1,4 +1,4 @@
-FROM node:16-alpine
+FROM node:18-alpine
 LABEL "repository"="https://github.com/anothrNick/github-tag-action"
 LABEL "homepage"="https://github.com/anothrNick/github-tag-action"
 LABEL "maintainer"="Nick Sjostrom"
diff --git a/entrypoint.sh b/entrypoint.sh
index b09ea3be..df227d21 100755
--- a/entrypoint.sh
+++ b/entrypoint.sh
@@ -1,6 +1,6 @@
 #!/bin/bash
 
-set -o pipefail
+set -eo pipefail
 
 # config
 default_semvar_bump=${DEFAULT_BUMP:-minor}

From 5972b1f36ac90e31e275d54eeb5c3e66039a94fb Mon Sep 17 00:00:00 2001
From: Santiago Bernhardt <santiago.bernhardt@gmail.com>
Date: Sat, 6 May 2023 21:20:30 +1200
Subject: [PATCH 2/3] Sort grep to default to always 0

---
 entrypoint.sh | 8 ++++----
 1 file changed, 4 insertions(+), 4 deletions(-)

diff --git a/entrypoint.sh b/entrypoint.sh
index df227d21..9b71dcf6 100755
--- a/entrypoint.sh
+++ b/entrypoint.sh
@@ -81,12 +81,12 @@ preTagFmt="^v?[0-9]+\.[0-9]+\.[0-9]+(-$suffix\.[0-9]+)$"
 # get latest tag that looks like a semver (with or without v)
 case "$tag_context" in
     *repo*) 
-        tag="$(git for-each-ref --sort=-v:refname --format '%(refname:lstrip=2)' | grep -E "$tagFmt" | head -n 1)"
-        pre_tag="$(git for-each-ref --sort=-v:refname --format '%(refname:lstrip=2)' | grep -E "$preTagFmt" | head -n 1)"
+        tag="$(git for-each-ref --sort=-v:refname --format '%(refname:lstrip=2)' | (grep -E "$tagFmt" || true) | head -n 1)"
+        pre_tag="$(git for-each-ref --sort=-v:refname --format '%(refname:lstrip=2)' | (grep -qs -E "$preTagFmt" || true) | head -n 1)"
         ;;
     *branch*) 
-        tag="$(git tag --list --merged HEAD --sort=-v:refname | grep -E "$tagFmt" | head -n 1)"
-        pre_tag="$(git tag --list --merged HEAD --sort=-v:refname | grep -E "$preTagFmt" | head -n 1)"
+        tag="$(git tag --list --merged HEAD --sort=-v:refname | (grep -E "$tagFmt" || true) | head -n 1)"
+        pre_tag="$(git tag --list --merged HEAD --sort=-v:refname | (grep -qs -E "$preTagFmt" || true) | head -n 1)"
         ;;
     * ) echo "Unrecognised context"
         exit 1;;

From db23a5c93777334e1ea393e6844fb6ef23621e32 Mon Sep 17 00:00:00 2001
From: Santiago Bernhardt <santiago.bernhardt@gmail.com>
Date: Sat, 6 May 2023 21:27:07 +1200
Subject: [PATCH 3/3] Pre tag commit can be null

---
 entrypoint.sh | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/entrypoint.sh b/entrypoint.sh
index 9b71dcf6..c85ca307 100755
--- a/entrypoint.sh
+++ b/entrypoint.sh
@@ -178,7 +178,7 @@ esac
 if $pre_release
 then
     # get current commit hash for tag
-    pre_tag_commit=$(git rev-list -n 1 "$pre_tag")
+    pre_tag_commit=$(git rev-list -n 1 "$pre_tag" || true)
     # skip if there are no new commits for pre_release
     if [ "$pre_tag_commit" == "$commit" ]
     then