From 4e7c37ee07c8d1f636baad26046f5755db8e1c5e Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Ren=C3=A9=20Fritze?= <rene.fritze@wwu.de>
Date: Tue, 19 Apr 2022 09:38:33 +0200
Subject: [PATCH] [ci] rewire docker image metadata

this should now also work if the repo name isn't all lowercase
---
 .github/workflows/ci.yml | 16 +++++++++++++---
 1 file changed, 13 insertions(+), 3 deletions(-)

diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index 9cd75fe..be1561e 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -3,6 +3,10 @@ name: CI
 on:
   push:
 
+env:
+  REGISTRY: ghcr.io
+  IMAGE_NAME: ${{ github.repository }}
+
 jobs:
   maven:
     runs-on: ubuntu-latest
@@ -38,9 +42,15 @@ jobs:
           registry: ghcr.io
           username: ${{ github.actor }}
           password: ${{ secrets.GITHUB_TOKEN }}
-
+      # https://github.com/docker/metadata-action (lower cases image name, etc.)
+      - name: Extract Docker metadata
+        id: meta
+        uses: docker/metadata-action@98669ae865ea3cffbcbaa878cf57c20bbf1c6c38
+        with:
+          images: ${{ env.REGISTRY }}/${{ env.IMAGE_NAME }}
       - name: Build and push
         uses: docker/build-push-action@v2
         with:
-          push: true
-          tags: ghcr.io/${{ github.repository }}:${{ github.ref_name }}
\ No newline at end of file
+          push: ${{ github.event_name != 'pull_request' }}
+          tags: ${{ steps.meta.outputs.tags }}
+          labels: ${{ steps.meta.outputs.labels }}