add new exclude_file_required input to the action.yml spec

Author: GrantBirki

README.md

@@ -50,6 +50,7 @@ Here is a quick example of how to install this action in any workflow:
 | `yaml_exclude_regex` | `false` | `""` | A regex to exclude files from validation (e.g. `".*\.schema\.yaml$"` to exclude all files ending with `.schema.yaml`) - Default is `""` which doesn't exclude any files |
 | `yaml_as_json` | `false` | `"false"` | Whether or not to treat and validate YAML files as JSON files - `"true"` or `"false"` - Default is `"false"`. If this is true, the JSON schema will be used to validate YAML files. Any YAML schemas will be ignored. For this context, a YAML file is any file which matches the yaml_extension or yaml_extension_short inputs. See the [docs](docs/yaml_as_json.md) for more details |
 | `exclude_file` | `false` | `""` | The full path to a file in the repository where this Action is running that contains a list of '.gitignore'-style patterns to exclude files from validation (e.g. ./exclude.txt) |
+| `exclude_file_required` | `true` | `"true"` | Whether or not the `exclude_file` must exist if it is used. If this is `true` and the `exclude_file` does not exist, the Action will fail. Set this to `"false"` if you do not care when the `exclude_file` exists or not |
 | `use_gitignore` | `true` | `"true"` | Whether or not to use the .gitignore file in the root of the repository to exclude files from validation - `"true"` or `"false"` - Default is `"true"` |
 | `git_ignore_path` | `false` | `".gitignore"` | The full path to the .gitignore file to use if use_gitignore is set to "true" (e.g. ./src/.gitignore) - Default is ".gitignore" which uses the .gitignore file in the root of the repository |
 | `allow_multiple_documents` | `false` | `"false"` | Whether or not to allow multiple documents in a single YAML file - `"true"` or `"false"` - Default is `"false"`. Useful for k8s documents. |

action.yml

@@ -73,6 +73,10 @@ inputs:
     description: The full path to a file in the repository where this Action is running that contains a list of '.gitignore'-style patterns to exclude files from validation (e.g. ./exclude.txt)
     required: false
     default: ""
+  exclude_file_required:
+    description: Whether or not the exclude_file must exist if it is used. If this is true and the exclude_file does not exist, the Action will fail - "true" or "false" - Default is "true"
+    required: false
+    default: "true"
   use_gitignore:
     description: Whether or not to use the .gitignore file in the root of the repository to exclude files from validation - "true" or "false" - Default is "true"
     required: true