Add buildoptions

README.md

@@ -123,6 +123,22 @@ All `buildargs` will be masked, so that they don't appear in the logs.
     buildargs: MY_FIRST,MY_SECOND
 ```
 
+### buildoptions
+Use `buildoptions` when you want to configure [options](https://docs.docker.com/engine/reference/commandline/build/#options) for building.  
+
+```yaml
+- name: Publish to Registry
+  uses: elgohr/Publish-Docker-Github-Action@master
+  env:
+    MY_FIRST: variableContent
+    MY_SECOND: variableContent
+  with:
+    name: myDocker/repository
+    username: ${{ secrets.DOCKER_USERNAME }}
+    password: ${{ secrets.DOCKER_PASSWORD }}
+    buildoptions: "--compress --force-rm"
+```
+
 ### cache
 Use `cache` when you have big images, that you would only like to build partially (changed layers).  
 > CAUTION: Docker builds will cache non-repoducable commands, such as installing packages. If you use this option, your packages will never update. To avoid this, run this action on a schedule with caching **disabled** to rebuild the cache periodically.

entrypoint.sh

@@ -100,13 +100,13 @@ function changeWorkingDirectory() {
 }
 
 function useCustomDockerfile() {
-  BUILDPARAMS="$BUILDPARAMS -f ${INPUT_DOCKERFILE}"
+  BUILDPARAMS="${BUILDPARAMS} -f ${INPUT_DOCKERFILE}"
 }
 
 function addBuildArgs() {
-  for arg in $(echo "${INPUT_BUILDARGS}" | tr ',' '\n'); do
-    BUILDPARAMS="$BUILDPARAMS --build-arg ${arg}"
-    echo "::add-mask::${arg}"
+  for ARG in $(echo "${INPUT_BUILDARGS}" | tr ',' '\n'); do
+    BUILDPARAMS="${BUILDPARAMS} --build-arg ${ARG}"
+    echo "::add-mask::${ARG}"
   done
 }
 
@@ -129,14 +129,14 @@ function pushWithSnapshot() {
   local SHORT_SHA=$(echo "${GITHUB_SHA}" | cut -c1-6)
   local SNAPSHOT_TAG="${TIMESTAMP}${SHORT_SHA}"
   local SHA_DOCKER_NAME="${INPUT_NAME}:${SNAPSHOT_TAG}"
-  docker build $BUILDPARAMS -t ${DOCKERNAME} -t ${SHA_DOCKER_NAME} ${CONTEXT}
+  docker build ${INPUT_BUILDOPTIONS} ${BUILDPARAMS} -t ${DOCKERNAME} -t ${SHA_DOCKER_NAME} ${CONTEXT}
   docker push ${DOCKERNAME}
   docker push ${SHA_DOCKER_NAME}
   echo ::set-output name=snapshot-tag::"${SNAPSHOT_TAG}"
 }
 
 function pushWithoutSnapshot() {
-  docker build $BUILDPARAMS -t ${DOCKERNAME} ${CONTEXT}
+  docker build ${INPUT_BUILDOPTIONS} ${BUILDPARAMS} -t ${DOCKERNAME} ${CONTEXT}
   docker push ${DOCKERNAME}
 }
 

test.bats

@@ -417,6 +417,30 @@ teardown() {
 /usr/local/bin/docker inspect --format={{index .RepoDigests 0}} my/repository:latest"
 }
 
+@test "it uses buildoptions for building, if configured" {
+  export INPUT_BUILDOPTIONS='--compress --force-rm'
+
+  run /entrypoint.sh
+
+  expectMockCalled "/usr/local/bin/docker build --compress --force-rm -t my/repository:latest ."
+}
+
+@test "it uses buildoptions for building with snapshot, if configured" {
+  export INPUT_BUILDOPTIONS='--compress --force-rm'
+  export INPUT_SNAPSHOT='true'
+
+  export GITHUB_SHA='12169ed809255604e557a82617264e9c373faca7'
+
+  declare -A -p MOCK_RETURNS=(
+  ['/usr/local/bin/docker']=""
+  ['/usr/bin/date']="197001010101"
+  ) > mockReturns
+
+  run /entrypoint.sh
+
+  expectMockCalled "/usr/local/bin/docker build --compress --force-rm -t my/repository:latest -t my/repository:19700101010112169e ."
+}
+
 function expectStdOutContains() {
   local expected=$(echo "${1}" | tr -d '\n')
   local got=$(echo "${output}" | tr -d '\n')