no_push can be used without login (#111)

- fixes #110

entrypoint.sh

@@ -9,10 +9,12 @@ main() {
  echo "::add-mask::${INPUT_PASSWORD}"
  set -x
  fi
- 
+
  sanitize "${INPUT_NAME}" "name"
- sanitize "${INPUT_USERNAME}" "username"
- sanitize "${INPUT_PASSWORD}" "password"
+ if ! usesBoolean "${INPUT_NO_PUSH}"; then
+ sanitize "${INPUT_USERNAME}" "username"
+ sanitize "${INPUT_PASSWORD}" "password"
+ fi
 
  registryToLower
  nameToLower
@@ -24,15 +26,17 @@ main() {
 
  if uses "${INPUT_TAGS}"; then
  TAGS=$(echo "${INPUT_TAGS}" | sed "s/,/ /g")
- else 
+ else
  translateDockerTag
  fi
 
  if uses "${INPUT_WORKDIR}"; then
  changeWorkingDirectory
  fi
 
- echo "${INPUT_PASSWORD}" | docker login -u ${INPUT_USERNAME} --password-stdin ${INPUT_REGISTRY}
+ if uses "${INPUT_USERNAME}" && uses "${INPUT_PASSWORD}"; then
+ echo "${INPUT_PASSWORD}" | docker login -u ${INPUT_USERNAME} --password-stdin ${INPUT_REGISTRY}
+ fi
 
  FIRST_TAG=$(echo "${TAGS}" | cut -d ' ' -f1)
  DOCKERNAME="${INPUT_NAME}:${FIRST_TAG}"
@@ -56,9 +60,11 @@ main() {
  fi
 
  build
- 
+
  if usesBoolean "${INPUT_NO_PUSH}"; then
- docker logout
+ if uses "${INPUT_USERNAME}" && uses "${INPUT_PASSWORD}"; then
+ docker logout
+ fi
  exit 0
  fi
 

test.bats

@@ -627,6 +627,18 @@ teardown() {
 /usr/local/bin/docker logout"
 }
 
+@test "it can be used for building without login" {
+ export GITHUB_REF='refs/heads/master'
+ export INPUT_NO_PUSH='true'
+ export INPUT_USERNAME=''
+
+ run /entrypoint.sh
+
+ expectStdOutIs ""
+
+ expectMockCalledIs "/usr/local/bin/docker build -t my/repository:latest ."
+}
+
 @test "it can change the default branch" {
  export GITHUB_REF='refs/heads/trunk'
  export INPUT_DEFAULT_BRANCH='trunk'