✨ Add feature for building an image without pushing it to a registry

README.md

@@ -162,6 +162,18 @@ jobs:
         password: ${{ secrets.DOCKER_PASSWORD }}
         cache: ${{ github.event_name != 'schedule' }}
 ```
+
+### no_push
+Use `no_push` when you want to build an image, but not push it to a registry.
+
+```yaml
+with:
+  name: myDocker/repository
+  username: ${{ secrets.DOCKER_USERNAME }}
+  password: ${{ secrets.DOCKER_PASSWORD }}
+  no_push: ${{ github.event_name == 'push' }}
+```
+
 ### Tags
 
 This action supports multiple options that tags are handled.  

action.yml

@@ -47,6 +47,9 @@ inputs:
   tag_semver:
     description: 'Push semver docker tags. e.g. image:1.2.3, image:1.2, image:1'
     required: false
+  no_push:
+    description: 'Set no_push to true if you want to prevent the action from pushing to a registry (default: false)'
+    required: false
 outputs:
   tag:
     description: 'Is the tag, which was pushed'

entrypoint.sh

@@ -55,6 +55,13 @@ main() {
     useSnapshot
   fi
 
+  build
+
+  if usesBoolean "${INPUT_NO_PUSH}"; then
+    docker logout
+    exit 0
+  fi
+
   push
 
   echo "::set-output name=tag::${FIRST_TAG}"
@@ -160,13 +167,15 @@ useSnapshot() {
   echo "::set-output name=snapshot-tag::${SNAPSHOT_TAG}"
 }
 
-push() {
+build() {
   local BUILD_TAGS=""
   for TAG in ${TAGS}; do
     BUILD_TAGS="${BUILD_TAGS}-t ${INPUT_NAME}:${TAG} "
   done
   docker build ${INPUT_BUILDOPTIONS} ${BUILDPARAMS} ${BUILD_TAGS} ${CONTEXT}
+}
 
+push() {
   for TAG in ${TAGS}; do
     docker push "${INPUT_NAME}:${TAG}"
   done