From 7563bd4f9c5aa92e7bd0820567632b5458d70e2f Mon Sep 17 00:00:00 2001
From: Bas Nijholt <bas@nijho.lt>
Date: Mon, 11 Dec 2023 16:24:55 -0800
Subject: [PATCH] Extract TAG_PREFIX

---
 .github/workflows/publish_image.yml | 16 +++++++++++-----
 1 file changed, 11 insertions(+), 5 deletions(-)

diff --git a/.github/workflows/publish_image.yml b/.github/workflows/publish_image.yml
index fbb5da8..b643cdf 100644
--- a/.github/workflows/publish_image.yml
+++ b/.github/workflows/publish_image.yml
@@ -36,16 +36,22 @@ jobs:
     - name: Setup Docker buildx
       uses: docker/setup-buildx-action@dc7b9719a96d48369863986a06765841d7ea23f6  # v2.0.0
 
-      - name: Prepare metadata
+    - name: Extract tag prefix
+      id: extract_tag
+      run: |
+        TAG_PREFIX=$(echo "${{ matrix.base-image }}" | sed -E 's/[^:]+:([^@]+)@.*/\1/')
+        echo "TAG_PREFIX=$TAG_PREFIX" >> $GITHUB_ENV
+
+
+    - name: Prepare metadata
       id: meta
-      uses: docker/metadata-action@69f6fc9d46f2f8bf0d5491e4aabe0bb8c6a4678a  # v4.0.1
+      uses: docker/metadata-action@69f6fc9d46f2f8bf0d5491e4aabe0bb8c6a4678a
       with:
         images: ${{ env.REGISTRY }}/${{ env.IMAGE_NAME }}
         tags: |
-          type=sha,enable=true,prefix=git-
+          type=raw,value=${{ env.TAG_PREFIX }}
           type=raw,value=latest
-          type=raw,value=${{ matrix.base-image | replace('/','-') | replace(':','-') | replace('@','-') }}
-
+  
     - name: Log into registry ${{ env.REGISTRY }}
       uses: docker/login-action@49ed152c8eca782a232dede0303416e8f356c37b  # v2.0.0
       with: