Turning variables into optional

Make template file optional adding default value
Make capabilites configurable

README.md

@@ -16,12 +16,27 @@ jobs:
     runs-on: ubuntu-latest
     steps:
     - uses: actions/checkout@v1
-    - uses: mgenteluci/cloudformation-deploy-action@v1
+    - uses: mgenteluci/cloudformation-deploy-action@v1.1.0
       env:
         TEMPLATE: 'template.yml'
+        CAPABILITIES: 'CAPABILITY_IAM'
         AWS_STACK_NAME: 'my-stack'
         AWS_REGION: 'us-east-1'
         AWS_ACCESS_KEY_ID: ${{secrets.AWS_ACCESS_KEY_ID}}
         AWS_SECRET_ACCESS_KEY: ${{secrets.AWS_SECRET_ACCESS_KEY}}
         AWS_DEPLOY_BUCKET: ${{secrets.AWS_DEPLOY_BUCKET}}
 ```
+
+### Environment Variables
+
+* `TEMPLATE` - [Optional]. YML file containing CloudFormation Stack. Default to `template.yml`.
+* `CAPABILITIES` - [Optional]. AWS Stack Capabilites. Default to `CAPABILITY_IAM`.
+* `AWS_STACK_NAME` - [**Required**]. The Stack name that is going to be published.
+* `AWS_REGION` - [**Required**]. AWS Region where to deploy the CloudFormation Stack.
+* `AWS_ACCESS_KEY_ID` - [**Required**]. AWS Access Key Id.
+* `AWS_SECRET_ACCESS_KEY` - [**Required**]. AWS Secret Access Key.
+* `AWS_DEPLOY_BUCKET` - [**Required**]. AWS S3 Bucket where the Stack package is going to be stored.
+
+### License
+
+The Dockerfile and associated scripts and documentation in this project are released under the [MIT License](LICENSE).

entrypoint.sh

@@ -3,8 +3,14 @@
 set -e
 
 if [[ -z "$TEMPLATE" ]]; then
-    echo Empty template specified
-    exit 1
+    echo Empty template specified. Searching template.yml...
+
+    if [[ ! -f "template.yml" ]]; then
+        echo default template.yml not found
+        exit 1
+    fi
+
+    TEMPLATE="template.yml"
 fi
 
 if [[ -z "$AWS_STACK_NAME" ]]; then
@@ -32,6 +38,10 @@ if [[ -z "$AWS_DEPLOY_BUCKET" ]]; then
     exit 1
 fi
 
+if [[ -z "$CAPABILITIES" ]]; then
+    CAPABILITIES=CAPABILITY_IAM
+fi
+
 mkdir ~/.aws
 touch ~/.aws/credentials
 touch ~/.aws/config
@@ -46,4 +56,4 @@ output = text
 region = $AWS_REGION" > ~/.aws/config
 
 aws cloudformation package --template-file $TEMPLATE --output-template-file serverless-output.yaml --s3-bucket $AWS_DEPLOY_BUCKET
-aws cloudformation deploy --template-file serverless-output.yaml --stack-name $AWS_STACK_NAME --capabilities CAPABILITY_IAM
+aws cloudformation deploy --template-file serverless-output.yaml --stack-name $AWS_STACK_NAME --capabilities $CAPABILITIES