From 8f858982b9971bab45dc2f4771dacaca8bb23f55 Mon Sep 17 00:00:00 2001
From: Zuhair AlSader <zuhair@koor.tech>
Date: Thu, 17 Aug 2023 17:22:13 -0400
Subject: [PATCH] Add option to exclude tags

Signed-off-by: Zuhair AlSader <zuhair@koor.tech>
---
 README.md  |  1 +
 action.yml |  6 ++++++
 cr.sh      | 14 +++++++++++++-
 3 files changed, 20 insertions(+), 1 deletion(-)

diff --git a/README.md b/README.md
index ba8d0ef..1df4e51 100644
--- a/README.md
+++ b/README.md
@@ -23,6 +23,7 @@ A GitHub action to turn a GitHub project into a self-hosted Helm chart repo, usi
 - `mark_as_latest`: When you set this to `false`, it will mark the created GitHub release not as 'latest'.
 - `packages_with_index`: When you set this to `true`, it will upload chart packages directly into publishing branch.
 - `pages_branch`: Name of the branch to be used to push the index and artifacts. (default to: gh-pages but it is not set in the action it is a default value for the chart-releaser binary)
+- `exclude_tags`: Tags matching this glob are excluded when looking for the latest release
 
 ### Outputs
 
diff --git a/action.yml b/action.yml
index ade9f00..18adb53 100644
--- a/action.yml
+++ b/action.yml
@@ -37,6 +37,8 @@ inputs:
     required: false
   pages_branch:
     description: "Name of the branch to be used to push the index and artifacts. (default to: gh-pages but it is not set in the action it is a default value for the chart-releaser binary)"
+  exclude_tags:
+    description: "Tags matching this glob are excluded when looking for the latest release"
     required: false
 outputs:
   changed_charts:
@@ -97,6 +99,10 @@ runs:
         if [[ -n "${{ inputs.pages_branch }}" ]]; then
             args+=(--pages-branch "${{ inputs.pages_branch }}")
         fi
+        
+        if [[ -n "${{ inputs.exclude_tags }}" ]]; then
+            args+=(--exclude-tags "${{ inputs.exclude_tags }}")
+        fi
 
         "$GITHUB_ACTION_PATH/cr.sh" "${args[@]}"
 
diff --git a/cr.sh b/cr.sh
index 3a6f990..2128711 100755
--- a/cr.sh
+++ b/cr.sh
@@ -37,6 +37,7 @@ Usage: $(basename "$0") <options>
         --skip-existing           Skip package upload if release exists
     -l, --mark-as-latest          Mark the created GitHub release as 'latest' (default: true)
         --packages-with-index     Upload chart packages directly into publishing branch
+    -e, --exclude-tags            Tags matching this glob are excluded when looking for the latest release
 EOF
 }
 
@@ -53,6 +54,7 @@ main() {
   local mark_as_latest=true
   local packages_with_index=false
   local pages_branch=
+  local exclude_tags=
 
   parse_command_line "$@"
 
@@ -210,6 +212,12 @@ parse_command_line() {
         shift
       fi
       ;;
+    -e | --exclude-tags)
+      if [[ -n "${2:-}" ]]; then
+        exclude_tags="$2"
+        shift
+      fi
+      ;;
     *)
       break
       ;;
@@ -264,8 +272,12 @@ install_chart_releaser() {
 
 lookup_latest_tag() {
   git fetch --tags >/dev/null 2>&1
+  local describe_args=(--tags --abbrev=0)
+    if [[ -n "$exclude_tags" ]]; then
+    describe_args+=(--exclude="$exclude_tags")
+  fi
 
-  if ! git describe --tags --abbrev=0 HEAD~ 2>/dev/null; then
+  if ! git describe "${describe_args[@]}" HEAD~ 2>/dev/null; then
     git rev-list --max-parents=0 --first-parent HEAD
   fi
 }