Merge pull request #2131 from nextcloud/fix/tool/ci-forks

Author: provokateurin

.github/workflows/dart.yml

@@ -49,6 +49,9 @@ jobs:
           packages_glob="${packages_glob:1}"
           if [ -n "$packages_glob" ]; then
             if [[ "$packages_glob" == *"nextcloud"* ]]; then
+              if [[ "${{ github.event.pull_request.head.repo.full_name }}" == "${{ github.repository }}" ]]; then
+                export PUSH_IMAGES="1"
+              fi
               ./tool/build-dev-container.sh
             fi
             MELOS_PACKAGES="$packages_glob" melos test

tool/common.sh

@@ -15,7 +15,7 @@ function cache_build_args() {
       "--cache-to" "type=inline,mode=max"
       "--cache-from" "type=registry,ref=$tag"
     )
-    if [ -v GITHUB_REPOSITORY ]; then
+    if [ -v PUSH_IMAGES ]; then
       build_args+=("--cache-to" "type=registry,ref=$tag,mode=max")
     fi