From f500803c0609f156672e9673f290a94894c6961f Mon Sep 17 00:00:00 2001
From: Derek Roberts <derek.roberts@gmail.com>
Date: Mon, 14 Nov 2022 18:25:38 -0800
Subject: [PATCH] docker/build-push-action requires all lowercase (#7)

---
 action.yml | 9 ++++++++-
 1 file changed, 8 insertions(+), 1 deletion(-)

diff --git a/action.yml b/action.yml
index 2e68788..28556c3 100644
--- a/action.yml
+++ b/action.yml
@@ -111,13 +111,20 @@ runs:
         username: ${{ github.actor }}
         password: ${{ inputs.token }}
 
+    - name: Force lowercase for Docker
+      shell: bash
+      id: lowercase
+      run: |
+        TAGS=$( echo "ghcr.io/${{ github.repository }}/${{ inputs.package }}:${{ inputs.tag }}" | tr '[:upper:]' '[:lower:]' )
+        echo "tags=${TAGS}" >> $GITHUB_OUTPUT
+
     - name: Build and push ${{ inputs.package }} Docker image
       if: steps.check.outputs.build == 'true'
       uses: docker/build-push-action@v3
       with:
         context: ./${{ inputs.package }}/
         push: true
-        tags: ghcr.io/${{ github.repository }}/${{ inputs.package }}:${{ inputs.tag }}
+        tags: ${{ steps.lowercase.outputs.tags }}
         cache-from: type=gha
         cache-to: type=gha,mode=max