added action.yaml

Author: nasir-rabbani

Dockerfile

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+FROM ghcr.io/appcd-dev/appcd-dist/stackgen-cli:latest
+
+ENTRYPOINT ["/usr/bin/stackgen"]

README.md

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-# stackgen-action
+# Stackgen CLI GitHub Action
+
+This action allows you to run Stackgen CLI commands in your GitHub workflows.
+
+## Inputs
+
+### Required Inputs
+
+- `command`: The main stackgen command to run (appstack, provision, destroy, etc)
+
+### Optional Inputs
+
+- `subcommand`: Subcommand for the main command (if applicable)
+- `flags`: Command flags as a multi-line string, one flag per line
+- `aws_access_key`: AWS Access Key for authentication
+- `aws_secret_key`: AWS Secret Key for authentication
+- `aws_region`: AWS Region
+
+## Example Usage
+
+```yaml
+- uses: your-org/stackgen-action@v1
+  with:
+    command: 'provision'
+    flags: |
+      --appstack-id my-stack-id
+      --apply
+      --work-dir ./infrastructure
+      --log 3
+      --output human
+      --var environment=production
+      --var region=us-west-2
+      --backend-config bucket=my-terraform-state
+    aws_access_key: ${{ secrets.AWS_ACCESS_KEY_ID }}
+    aws_secret_key: ${{ secrets.AWS_SECRET_ACCESS_KEY }}
+    aws_region: 'us-west-2'
+```
+
+## Advanced Usage - Multiple Commands
+
+```yaml
+jobs:
+  deploy:
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v2
+      
+      - name: Generate Infrastructure
+        uses: your-org/stackgen-action@v1
+        with:
+          command: 'generate'
+          flags: |
+            --work-dir ./infrastructure
+          
+      - name: Provision Infrastructure
+        uses: your-org/stackgen-action@v1
+        with:
+          command: 'provision'
+          flags: |
+            --apply
+            --work-dir ./infrastructure
+          aws_access_key: ${{ secrets.AWS_ACCESS_KEY_ID }}
+          aws_secret_key: ${{ secrets.AWS_SECRET_ACCESS_KEY }}
+```
+
+Each flag in the `flags` input should be on a new line, including its value if applicable. This provides a more straightforward and readable way to pass command-line arguments to the Stackgen CLI.

action.yml

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+name: 'Stackgen CLI Action'
+description: 'GitHub Action for Stackgen CLI operations'
+inputs:
+  command:
+    description: 'The stackgen command to run (appstack, provision, destroy, etc)'
+    required: true
+  subcommand:
+    description: 'Subcommand for the main command (if applicable)'
+    required: false
+  flags:
+    description: 'Command flags as a multi-line string, one flag per line'
+    required: false
+  aws_access_key:
+    description: 'AWS Access Key'
+    required: false
+  aws_secret_key:
+    description: 'AWS Secret Key'
+    required: false
+  aws_region:
+    description: 'AWS Region'
+    required: false
+
+runs:
+  using: 'docker'
+  image: 'Dockerfile'
+  args:
+    - ${{ inputs.command }}
+    - ${{ inputs.subcommand }}
+    - ${{ inputs.flags }}
+  env:
+    AWS_ACCESS_KEY_ID: ${{ inputs.aws_access_key }}
+    AWS_SECRET_ACCESS_KEY: ${{ inputs.aws_secret_key }}
+    AWS_DEFAULT_REGION: ${{ inputs.aws_region }}