# aws-lambda-update

Update Lambda function alias to a new version, optionally wait for provisioned concurrency.

## Inputs

| Input | Required | Default | Description |
|-------|----------|---------|-------------|
| `function-name` | Yes | | Lambda function name |
| `function-version` | Yes | | Lambda version number |
| `alias-name` | Yes | | Alias name |
| `aws-role-arn` | Yes | | IAM role via OIDC |
| `wait-provisioned-concurrency` | No | `false` | Poll until provisioned concurrency is READY |
| `aws-profile` | No | `default` | AWS CLI profile name |
| `region` | No | `eu-central-1` | AWS region |
| `lambda-alias-updates-json` | No | `""` | JSON array of `{function_name, version, alias_name}` objects for batch updates |

## Usage

```yaml
- uses: schmalz/shared-actions/.github/actions/aws-lambda-update@v1
  with:
    function-name: my-function
    function-version: "42"
    alias-name: live
    aws-role-arn: ${{ secrets.AWS_ROLE_ARN }}
    wait-provisioned-concurrency: "true"
```

### Batch update

```yaml
- uses: schmalz/shared-actions/.github/actions/aws-lambda-update@v1
  with:
    function-name: unused
    function-version: "0"
    alias-name: unused
    aws-role-arn: ${{ secrets.AWS_ROLE_ARN }}
    lambda-alias-updates-json: |
      [
        {"function_name": "fn-a", "version": "3", "alias_name": "live"},
        {"function_name": "fn-b", "version": "7", "alias_name": "live"}
      ]
```

## Notes

- When `lambda-alias-updates-json` is set, the single-alias inputs (`function-name`, `function-version`, `alias-name`) are ignored.
- Provisioned concurrency polling checks every 5 seconds and fails the step if status becomes `FAILED`.
- Uses `aws-configure` internally for OIDC authentication.