feat: support for skip-labeling parameter for GitHub action (#1066)

Adds support and documentation for the skipLabeling option when running
release-please from GitHub Actions.

This option in the config are ignored when running in
release-please-action, and only honored when you pass it as an option
via a command line. This PR adds the same support to GitHub action.

---------

Co-authored-by: Jeff Ching <[email protected]>

Author: huksley

Diff for: README.md

@@ -83,6 +83,7 @@ steps:
 | `proxy-server`             | Configure a proxy servier in the form of `<host>:<port>` e.g. `proxy-host.com:8080`                                                    |
 | `skip-github-release`      | If `true`, do not attempt to create releases. This is useful if splitting release tagging from PR creation.                            |
 | `skip-github-pull-request` | If `true`, do not attempt to create release pull requests. This is useful if splitting release tagging from PR creation.               |
+| `skip-labeling`            | If `true`, do not attempt to label the PR.                                                                                          |
 
 ## GitHub Credentials
 

Diff for: action.yml

@@ -58,6 +58,10 @@ inputs:
     description: 'if set to true, then do not try to open pull requests'
     required: false
     default: false
+  skip-labeling:
+    description: 'if set to true, then do not try to label the PR'
+    required: false
+    default: false
   changelog-host:
     description: 'The proto://host where commits live. Default `https://github.com`'
     required: false

Diff for: src/index.ts

@@ -39,6 +39,7 @@ interface ActionInputs {
   targetBranch?: string;
   skipGitHubRelease?: boolean;
   skipGitHubPullRequest?: boolean;
+  skipLabeling?: boolean;
   fork?: boolean;
   includeComponentInTag?: boolean;
   changelogHost: string;
@@ -60,6 +61,7 @@ function parseInputs(): ActionInputs {
     proxyServer: getOptionalInput('proxy-server'),
     skipGitHubRelease: getOptionalBooleanInput('skip-github-release'),
     skipGitHubPullRequest: getOptionalBooleanInput('skip-github-pull-request'),
+    skipLabeling: getOptionalBooleanInput('skip-labeling'),
     fork: getOptionalBooleanInput('fork'),
     includeComponentInTag: getOptionalBooleanInput('include-component-in-tag'),
     changelogHost: core.getInput('changelog-host') || DEFAULT_GITHUB_SERVER_URL,
@@ -95,13 +97,15 @@ function loadOrBuildManifest(
       },
       {
         fork: inputs.fork,
+        skipLabeling: inputs.skipLabeling,
       },
       inputs.path
     );
   }
-  const manifestOverrides = inputs.fork
+  const manifestOverrides = inputs.fork || inputs.skipLabeling
     ? {
         fork: inputs.fork,
+        skipLabeling: inputs.skipLabeling,
       }
     : {};
   core.debug('Loading manifest from config file');