chore: issue labeler workflow (#118)

Attempting to copy and projenify this workflow:
https://github.com/aws/aws-cdk/blob/main/.github/workflows/issue-label-assign.yml

---
By submitting this pull request, I confirm that my contribution is made
under the terms of the Apache-2.0 license

---------

Signed-off-by: github-actions <github-actions@github.com>
Co-authored-by: github-actions <github-actions@github.com>

Author: kaizencc

.gitattributes

@@ -6,6 +6,7 @@ import { AdcPublishing } from './projenrc/adc-publishing';
 import { BundleCli } from './projenrc/bundle';
 import { CodeCovWorkflow } from './projenrc/codecov';
 import { ESLINT_RULES } from './projenrc/eslint';
+import { IssueLabeler } from './projenrc/issue-labeler';
 import { JsiiBuild } from './projenrc/jsii';
 import { RecordPublishingTimestamp } from './projenrc/record-publishing-timestamp';
 import { S3DocsPublishing } from './projenrc/s3-docs-publishing';
@@ -1352,4 +1353,6 @@ new CodeCovWorkflow(repo, {
   packages: [cli.name],
 });
 
+new IssueLabeler(repo);
+
 repo.synth();

.github/workflows/issue-label-assign.yml

@@ -0,0 +1,114 @@
+import { Component, github } from 'projen';
+import { JobPermission } from 'projen/lib/github/workflows-model';
+import { TypeScriptProject } from 'projen/lib/typescript';
+
+const OSDS_DEVS = ['ashishdhingra', 'khushail', 'hunhsieh'];
+const AREA_AFFIXES = ['@aws-cdk/'];
+const AREA_PARAMS = [
+  { area: '@aws-cdk/cli-lib-alpha', keywords: ['cli', 'cli-lib', 'cli-lib-alpha'], labels: ['@aws-cdk/cli-lib-alpha'] },
+  { area: '@aws-cdk/cloud-assembly-schema', keywords: ['cloud-assembly', 'schema'], labels: ['@aws-cdk/cloud-assembly-schema'] },
+  { area: '@aws-cdk/cloudformation-diff', keywords: ['diff', 'cloudformation'], labels: ['@aws-cdk/cloudformation-diff'] },
+  { area: '@aws-cdk/toolkit-lib', keywords: ['toolkit', 'programmtic toolkit', 'toolkit-lib'], labels: ['@aws-cdk/toolkit-lib'] },
+  { area: 'aws-cdk', keywords: ['aws-cdk', 'cli', 'cdk cli'], labels: ['aws-cdk'] },
+  { area: 'cdk-assets', keywords: ['assets', 'cdk-assets'], labels: ['cdk-assets'] },
+];
+
+enum GitHubToken {
+  GITHUB_TOKEN = 'secrets.GITHUB_TOKEN',
+  PROJEN_GITHUB_TOKEN = 'secrets.PROJEN_GITHUB_TOKEN',
+}
+
+/**
+ * See https://github.com/aws-github-ops/aws-issue-triage-manager
+ */
+interface TriageManagerOptions {
+  target: 'pull-requests' | 'issues' | 'both';
+  excludedExpressions?: string[];
+  includedLabels?: string[];
+  excludedLabels?: string[];
+  defaultArea?: string;
+  parameters?: string;
+  affixes?: string;
+  areaIsKeyword?: boolean;
+  /**
+   * Whether or not the env variables are needed for the job.
+   * Workflow-level env variables are not configurable via Projen
+   */
+  needEnvs?: boolean;
+  /**
+   * @default GitHubToken.GITHUB_TOKEN
+   */
+  githubToken?: GitHubToken;
+}
+
+function stringifyList(list: string[]) {
+  return `[${list.join('|')}]`;
+}
+
+function triageManagerJob(triageManagerOptions: TriageManagerOptions) {
+  return {
+    name: 'Triage Manager',
+    runsOn: ['aws-cdk_ubuntu-latest_4-core'],
+    permissions: { issues: JobPermission.WRITE, pullRequests: JobPermission.WRITE },
+    steps: [
+      {
+        name: 'Triage Manager',
+        uses: 'aws-github-ops/aws-issue-triage-manager@main',
+        with: {
+          'github-token': `\${{ ${triageManagerOptions.githubToken ?? 'secrets.GITHUB_TOKEN'} }}`,
+          'target': triageManagerOptions.target,
+          'excluded-expressions': triageManagerOptions.excludedExpressions ? stringifyList(triageManagerOptions.excludedExpressions) : undefined,
+          'included-labels': triageManagerOptions.includedLabels ? stringifyList(triageManagerOptions.includedLabels) : undefined,
+          'excluded-labels': triageManagerOptions.excludedLabels ? stringifyList(triageManagerOptions.excludedLabels) : undefined,
+          'default-area': triageManagerOptions.defaultArea,
+          'parameters': triageManagerOptions.parameters,
+          'affixes': triageManagerOptions.affixes,
+          'area-is-keyword': triageManagerOptions.areaIsKeyword,
+        },
+      },
+    ],
+    ...(triageManagerOptions.needEnvs ? {
+      env: {
+        AREA_PARAMS: JSON.stringify(AREA_PARAMS),
+        AREA_AFFIXES: `{"prefixes":${JSON.stringify(AREA_AFFIXES)}}`,
+        OSDS_DEVS: `{"assignees":${JSON.stringify(OSDS_DEVS)}}`,
+      },
+    } : {}),
+  };
+}
+
+export class IssueLabeler extends Component {
+  public readonly workflow: github.GithubWorkflow;
+
+  constructor(repo: TypeScriptProject) {
+    super(repo);
+
+    if (!repo.github) {
+      throw new Error('Given repository does not have a GitHub component');
+    }
+
+    this.workflow = repo.github.addWorkflow('issue-label-assign');
+    this.workflow.on({
+      pullRequestTarget: { types: ['opened'] },
+      issues: { types: ['opened', 'edited'] },
+    });
+
+    this.workflow.addJob('Triage Issues', triageManagerJob({
+      target: 'issues',
+      excludedExpressions: ['CDK CLI Version', 'TypeScript', 'Java', 'Python', 'Go'],
+      includedLabels: ['needs-triage'],
+      excludedLabels: ['p1', 'p2', 'p0', 'effort-small', 'effort-medium', 'effort-large', 'guidance'],
+      defaultArea: '${{ env.OSDS_DEVS }}',
+      parameters: '${{ env.AREA_PARAMS }}',
+      affixes: '${{ env.AREA_AFFIXES }}',
+      needEnvs: true,
+    }));
+    this.workflow.addJob('Triage Pull Requests', triageManagerJob({
+      target: 'pull-requests',
+      areaIsKeyword: true,
+      defaultArea: '{"reviewers":{"teamReviewers":["aws-cdk-owners"]}}',
+      parameters: '[{"area":"pullrequests","keywords":["pullrequestkeyword"]}]',
+      githubToken: GitHubToken.PROJEN_GITHUB_TOKEN,
+    }));
+  }
+}