chore(main): release 2.2.0 (#34)

Co-authored-by: jimehbot[bot] <132453784+jimehbot[bot]@users.noreply.github.com>

.github/.release-please-manifest.json

@@ -1,3 +1,3 @@
 {
-  ".": "2.0.0"
+  ".": "2.2.0"
 }

.github/release-please-config.json

@@ -1,15 +1,30 @@
 {
+  "always-update": true,
   "packages": {
     ".": {
-      "release-type": "simple",
+      "release-type": "node",
       "changelog-path": "CHANGELOG.md",
       "extra-files": ["README.md"],
       "bump-minor-pre-major": true,
       "bump-patch-for-minor-pre-major": true,
       "draft": false,
       "prerelease": false,
-      "initial-version": "0.0.1"
+      "include-component-in-tag": false
     }
   },
+  "changelog-sections": [
+    { "type": "feat", "section": "Features" },
+    { "type": "feature", "section": "Features" },
+    { "type": "fix", "section": "Bug Fixes" },
+    { "type": "perf", "section": "Performance Improvements" },
+    { "type": "revert", "section": "Reverts" },
+    { "type": "docs", "section": "Documentation", "hidden": false },
+    { "type": "style", "section": "Styles", "hidden": true },
+    { "type": "chore", "section": "Miscellaneous Chores", "hidden": true },
+    { "type": "refactor", "section": "Code Refactoring", "hidden": true },
+    { "type": "test", "section": "Tests", "hidden": true },
+    { "type": "build", "section": "Build System", "hidden": true },
+    { "type": "ci", "section": "Continuous Integration", "hidden": true }
+  ],
   "$schema": "https://raw.githubusercontent.com/googleapis/release-please/main/schemas/config.json"
 }

.github/workflows/ci.yml

@@ -77,7 +77,6 @@ jobs:
   release-please:
     runs-on: ubuntu-latest
     if: ${{ github.ref == 'refs/heads/main' }}
-    needs: [check-dist]
     outputs:
       release_created: ${{ steps.release-please.outputs.release_created }}
       major: ${{ steps.release-please.outputs.major }}
@@ -91,12 +90,12 @@ jobs:
 
   release-tags:
     runs-on: ubuntu-latest
-    needs: release-please
+    needs: [release-please, check-dist, lint, test]
     if: ${{ needs.release-please.outputs.release_created }}
     permissions:
       contents: write
     steps:
-      - uses: jimeh/update-tags-action@e58fa0f2f874a12bf0eb90ef8ab4256808c0f373 # v1.0.1
+      - uses: jimeh/update-tags-action@bf34cb3d0919fe9e601539e11a89b250e00e9cc3 # v2.0.0
         with:
           tags: |
             v${{ needs.release-please.outputs.major }}

.github/workflows/copilot-setup-steps.yml

@@ -0,0 +1,27 @@
+name: "Copilot Setup Steps"
+
+on:
+  workflow_dispatch:
+  push:
+    paths:
+      - .github/workflows/copilot-setup-steps.yml
+  pull_request:
+    paths:
+      - .github/workflows/copilot-setup-steps.yml
+
+jobs:
+  copilot-setup-steps:
+    runs-on: ubuntu-latest
+    permissions:
+      contents: read
+    steps:
+      - uses: actions/checkout@08c6903cd8c0fde910a37f88322edcfb5dd907a8 # v5.0.0
+      - uses: actions/setup-node@2028fbc5c25fe9cf00d9f06a71cc4710d4507903 # v6.0.0
+        with:
+          node-version-file: .node-version
+          cache: npm
+      - run: npm ci
+      - uses: ruby/setup-ruby@d5126b9b3579e429dd52e51e68624dda2e05be25 # v1.267.0
+        with:
+          ruby-version: ruby
+          bundler-cache: true

.github/workflows/licensed.yml

@@ -26,7 +26,7 @@ jobs:
           node-version-file: .node-version
           cache: npm
       - run: npm ci
-      - uses: ruby/setup-ruby@d5126b9b3579e429dd52e51e68624dda2e05be25 # v1.267.0 # v1.266.0
+      - uses: ruby/setup-ruby@d5126b9b3579e429dd52e51e68624dda2e05be25 # v1.267.0
         with:
           ruby-version: ruby
           bundler-cache: true

.gitignore

@@ -98,7 +98,7 @@ typings/
 Thumbs.db
 
 # Ignore built ts files
-__tests__/runner/*
+tests/runner/*
 
 # IDE files
 .idea

.prettierignore

@@ -3,3 +3,4 @@
 dist/
 node_modules/
 coverage/
+CHANGELOG.md

.vscode/settings.shared.json

@@ -1,5 +1,14 @@
 {
+  "[javascript]": {
+    "editor.defaultFormatter": "esbenp.prettier-vscode"
+  },
   "[typescript]": {
     "editor.defaultFormatter": "esbenp.prettier-vscode"
+  },
+  "[json]": {
+    "editor.defaultFormatter": "esbenp.prettier-vscode"
+  },
+  "[jsonc]": {
+    "editor.defaultFormatter": "esbenp.prettier-vscode"
   }
 }

AGENTS.md

@@ -35,7 +35,7 @@ npm run package       # Build src/index.ts -> dist/index.js via Rollup
 npm run bundle        # Alias: format + package
 
 # Run a single test file
-NODE_OPTIONS=--experimental-vm-modules NODE_NO_WARNINGS=1 npx jest __tests__/main.test.ts
+NODE_OPTIONS=--experimental-vm-modules NODE_NO_WARNINGS=1 npx jest tests/main.test.ts
 
 # CI variants (suppress warnings)
 npm run ci-test       # Run tests in CI mode
@@ -65,7 +65,7 @@ npm run package:watch # Auto-rebuild on changes
   - `processTag()`: Creates/updates individual tags based on `when_exists` mode
   - `resolveRefToSha()`: Converts git refs to commit SHAs (private helper)
 - **[action.yml](action.yml)**: GitHub Action metadata (inputs/outputs)
-- **[\_\_fixtures\_\_/](__fixtures__)**: Mock implementations of @actions/core,
+- **[tests/fixtures/](tests/fixtures)**: Mock implementations of @actions/core,
   @actions/github, and csv-parse for testing
 
 ### Tag Input Parsing
@@ -97,12 +97,12 @@ jest.unstable_mockModule('@actions/core', () => core)
 const { run } = await import('../src/main.ts')
 ```
 
-Mock fixtures live in `__fixtures__/` (e.g., `core.ts` mocks @actions/core).
+Mock fixtures live in `tests/fixtures/` (e.g., `core.ts` mocks @actions/core).
 
 ### Testing Best Practices
 
 - Consider edge cases as well as the main success path
-- Tests live in `__tests__/` directory, fixtures in `__fixtures__/`
+- Tests live in `tests/` directory, fixtures in `tests/fixtures/`
 - Run tests after any refactoring to ensure coverage requirements are met
 - Use `@actions/core` package for logging (not `console`) for GitHub Actions
   compatibility

CHANGELOG.md

@@ -1,5 +1,31 @@
 # Changelog
 
+## [2.2.0](https://github.com/jimeh/update-tags-action/compare/v2.1.1...v2.2.0) (2025-10-29)
+
+
+### Features
+
+* **action:** add skipped tags output and tracking ([#33](https://github.com/jimeh/update-tags-action/issues/33)) ([6723e4d](https://github.com/jimeh/update-tags-action/commit/6723e4d4aceb3ba7314907830d8b1d5186f0a5d9))
+
+## [2.1.1](https://github.com/jimeh/update-tags-action/compare/v2.1.0...v2.1.1) (2025-10-28)
+
+
+### Documentation
+
+* **readme:** fix outdated action inputs/outputs ([#26](https://github.com/jimeh/update-tags-action/issues/26)) ([c2d45bd](https://github.com/jimeh/update-tags-action/commit/c2d45bd3eff96a93679cc5dbac166c5a14400751))
+
+## [2.1.0](https://github.com/jimeh/update-tags-action/compare/v2.0.0...v2.1.0) (2025-10-28)
+
+
+### Features
+
+* **tag:** add support for annotated tags and improved tag handling ([40c0c24](https://github.com/jimeh/update-tags-action/commit/40c0c24c3478fe96765282b3f82b7f72696f0e92)), closes [#7](https://github.com/jimeh/update-tags-action/issues/7)
+
+
+### Bug Fixes
+
+* **when_exists:** fail-fast if tags exist if `when_exists` is `fail` ([40c0c24](https://github.com/jimeh/update-tags-action/commit/40c0c24c3478fe96765282b3f82b7f72696f0e92))
+
 ## [2.0.0](https://github.com/jimeh/update-tags-action/compare/v1.0.1...v2.0.0) (2025-10-27)
 
 
@@ -9,22 +35,25 @@
 
 ## [1.0.1](https://github.com/jimeh/update-tags-action/compare/v1.0.0...v1.0.1) (2023-05-18)
 
+
 ### Bug Fixes
 
-- **action:** tweak metadata for GitHub Marketplace
+* **action:** tweak metadata for GitHub Marketplace
   ([#4](https://github.com/jimeh/update-tags-action/issues/4))
   ([b74b3c7](https://github.com/jimeh/update-tags-action/commit/b74b3c77fc20bdfd61e29dbf680a9f84612e5fda))
 
 ## [1.0.0](https://github.com/jimeh/update-tags-action/compare/v0.0.1...v1.0.0) (2023-05-18)
 
+
 ### Miscellaneous Chores
 
-- **release:** bump version to 1.0.0
+* **release:** bump version to 1.0.0
   ([d4f686e](https://github.com/jimeh/update-tags-action/commit/d4f686ef9ff51ff4426907f89983bd286903c23e))
 
 ## 0.0.1 (2023-05-18)
 
+
 ### Features
 
-- initial implementation
+* initial implementation
   ([0185b10](https://github.com/jimeh/update-tags-action/commit/0185b100ff1752ce06ade4b147b6befb8c37e525))

README.md

@@ -22,20 +22,20 @@ to move its own major and minor tags.
 
 ### Basic
 
-<!-- x-release-please-start-major -->
+<!-- x-release-please-start-minor -->
 
 ```yaml
 - uses: jimeh/update-tags-action@v2
   with:
-    tags: v1,v1.2
+    tags: v2,v2.2
 ```
 
 ```yaml
 - uses: jimeh/update-tags-action@v2
   with:
     tags: |
-      v1
-      v1.2
+      v2
+      v2.2
 ```
 
 <!-- x-release-please-end -->
@@ -100,30 +100,38 @@ jobs:
 
 <!-- x-release-please-end -->
 
-<!-- action-docs-inputs -->
+<!-- action-docs-inputs source="action.yml" -->
 
 ## Inputs
 
-| parameter    | description                                                                       | required | default             |
-| ------------ | --------------------------------------------------------------------------------- | -------- | ------------------- |
-| tags         | List/CSV of tags to create/update.                                                | `true`   |                     |
-| ref          | The SHA or ref to tag. Defaults to SHA of current commit.                         | `false`  | ${{ github.sha }}   |
-| when_exists  | What to do if the tag already exists. Must be one of 'update', 'skip', or 'fail'. | `false`  | update              |
-| github_token | The GitHub token to use for authentication.                                       | `false`  | ${{ github.token }} |
+| name           | description                                                                                                           | required | default               |
+| -------------- | --------------------------------------------------------------------------------------------------------------------- | -------- | --------------------- |
+| `tags`         | <p>List/CSV of tags to create/update.</p>                                                                             | `true`   | `""`                  |
+| `ref`          | <p>The SHA or ref to tag. Defaults to SHA of current commit.</p>                                                      | `false`  | `${{ github.sha }}`   |
+| `when_exists`  | <p>What to do if the tag already exists. Must be one of 'update', 'skip', or 'fail'.</p>                              | `false`  | `update`              |
+| `annotation`   | <p>Optional annotation message for tags. If provided, creates annotated tags. If empty, creates lightweight tags.</p> | `false`  | `""`                  |
+| `github_token` | <p>The GitHub token to use for authentication.</p>                                                                    | `false`  | `${{ github.token }}` |
 
-<!-- action-docs-inputs -->
-
-<!-- action-docs-outputs -->
+<!-- action-docs-inputs source="action.yml" -->
+<!-- action-docs-outputs source="action.yml" -->
 
 ## Outputs
 
-| parameter | description                             |
-| --------- | --------------------------------------- |
-| tags      | List of tags that were created/updated. |
-| created   | List of tags that were created.         |
-| updated   | List of tags that were updated.         |
+| name      | description                                    |
+| --------- | ---------------------------------------------- |
+| `tags`    | <p>List of tags that were created/updated.</p> |
+| `created` | <p>List of tags that were created.</p>         |
+| `updated` | <p>List of tags that were updated.</p>         |
+| `skipped` | <p>List of tags that were skipped.</p>         |
 
-<!-- action-docs-outputs -->
+<!-- action-docs-outputs source="action.yml" -->
+<!-- action-docs-runs source="action.yml" -->
+
+## Runs
+
+This action is a `node24` action.
+
+<!-- action-docs-runs source="action.yml" -->
 
 ## License
 

__tests__/main.test.ts

@@ -1,657 +0,0 @@
-/**
- * Unit tests for the action's main functionality, src/main.ts
- */
-import { jest } from '@jest/globals'
-import * as core from '../__fixtures__/core.js'
-import * as github from '../__fixtures__/github.js'
-import * as csvParse from '../__fixtures__/csv-parse.js'
-
-// Mocks should be declared before the module being tested is imported.
-jest.unstable_mockModule('@actions/core', () => core)
-jest.unstable_mockModule('@actions/github', () => github)
-jest.unstable_mockModule('csv-parse/sync', () => csvParse)
-
-// The module being tested should be imported dynamically. This ensures that
-// the mocks are used in place of any actual dependencies.
-const { run } = await import('../src/main.js')
-
-// Helper functions for cleaner test setup
-const setupInputs = (inputs: Record<string, string>): void => {
-  core.getInput.mockImplementation((name: string) => {
-    return inputs[name] || ''
-  })
-}
-
-const setupCommitResolver = (
-  refToSha: Record<string, string> | string
-): void => {
-  if (typeof refToSha === 'string') {
-    github.mockOctokit.rest.repos.getCommit.mockResolvedValue({
-      data: { sha: refToSha }
-    })
-  } else {
-    github.mockOctokit.rest.repos.getCommit.mockImplementation(
-      async (args: unknown) => {
-        const { ref } = args as { ref: string }
-        const sha = refToSha[ref]
-        if (sha) return { data: { sha } }
-        throw new Error(`Unknown ref: ${ref}`)
-      }
-    )
-  }
-}
-
-const setupTagDoesNotExist = (): void => {
-  github.mockOctokit.rest.git.getRef.mockRejectedValue({
-    status: 404
-  })
-}
-
-const setupTagExists = (tagName: string, sha: string): void => {
-  github.mockOctokit.rest.git.getRef.mockImplementation(
-    async (args: unknown) => {
-      const { ref } = args as { ref: string }
-      if (ref === `tags/${tagName}`) {
-        return {
-          data: { ref: `refs/tags/${tagName}`, object: { sha } }
-        }
-      }
-      throw { status: 404 }
-    }
-  )
-}
-
-const setupTagExistsForAll = (sha: string): void => {
-  github.mockOctokit.rest.git.getRef.mockResolvedValue({
-    data: { ref: 'refs/tags/v1', object: { sha } }
-  })
-}
-
-describe('run', () => {
-  beforeEach(() => {
-    jest.resetAllMocks()
-    // Re-setup mocks after reset
-    github.getOctokit.mockReturnValue(github.mockOctokit)
-    csvParse.resetToRealImplementation()
-  })
-
-  it('creates new tags when they do not exist', async () => {
-    setupInputs({
-      tags: 'v1,v1.0',
-      ref: 'abc123',
-      github_token: 'test-token',
-      when_exists: 'update'
-    })
-    setupCommitResolver('sha-abc123')
-    setupTagDoesNotExist()
-
-    await run()
-
-    expect(github.mockOctokit.rest.git.createRef).toHaveBeenCalledTimes(2)
-    expect(github.mockOctokit.rest.git.createRef).toHaveBeenCalledWith({
-      owner: 'test-owner',
-      repo: 'test-repo',
-      ref: 'refs/tags/v1',
-      sha: 'sha-abc123'
-    })
-    expect(github.mockOctokit.rest.git.createRef).toHaveBeenCalledWith({
-      owner: 'test-owner',
-      repo: 'test-repo',
-      ref: 'refs/tags/v1.0',
-      sha: 'sha-abc123'
-    })
-
-    expect(core.info).toHaveBeenCalledWith(
-      "Tag 'v1' does not exist, creating with SHA sha-abc123."
-    )
-    expect(core.setOutput).toHaveBeenCalledWith('created', ['v1', 'v1.0'])
-    expect(core.setOutput).toHaveBeenCalledWith('updated', [])
-    expect(core.setOutput).toHaveBeenCalledWith('tags', ['v1', 'v1.0'])
-  })
-
-  it('updates existing tags when SHA differs', async () => {
-    setupInputs({
-      tags: 'v1',
-      ref: 'def456',
-      github_token: 'test-token',
-      when_exists: 'update'
-    })
-    setupCommitResolver('sha-def456')
-    setupTagExistsForAll('sha-old123')
-
-    await run()
-
-    expect(github.mockOctokit.rest.git.updateRef).toHaveBeenCalledTimes(1)
-    expect(github.mockOctokit.rest.git.updateRef).toHaveBeenCalledWith({
-      owner: 'test-owner',
-      repo: 'test-repo',
-      ref: 'tags/v1',
-      sha: 'sha-def456',
-      force: true
-    })
-
-    expect(core.info).toHaveBeenCalledWith(
-      "Tag 'v1' exists, updating to SHA sha-def456 (was sha-old123)."
-    )
-    expect(core.setOutput).toHaveBeenCalledWith('created', [])
-    expect(core.setOutput).toHaveBeenCalledWith('updated', ['v1'])
-    expect(core.setOutput).toHaveBeenCalledWith('tags', ['v1'])
-  })
-
-  it('skips updating when tag exists with same SHA', async () => {
-    setupInputs({
-      tags: 'v1',
-      ref: 'abc123',
-      github_token: 'test-token',
-      when_exists: 'update'
-    })
-    setupCommitResolver('sha-abc123')
-    setupTagExistsForAll('sha-abc123')
-
-    await run()
-
-    expect(github.mockOctokit.rest.git.updateRef).not.toHaveBeenCalled()
-    expect(github.mockOctokit.rest.git.createRef).not.toHaveBeenCalled()
-    expect(core.info).toHaveBeenCalledWith(
-      "Tag 'v1' already exists with desired SHA sha-abc123."
-    )
-    expect(core.setOutput).toHaveBeenCalledWith('created', [])
-    expect(core.setOutput).toHaveBeenCalledWith('updated', [])
-    expect(core.setOutput).toHaveBeenCalledWith('tags', [])
-  })
-
-  it('skips tags when when_exists is skip', async () => {
-    setupInputs({
-      tags: 'v1',
-      ref: 'abc123',
-      github_token: 'test-token',
-      when_exists: 'skip'
-    })
-    setupCommitResolver('sha-abc123')
-    setupTagExistsForAll('sha-old123')
-
-    await run()
-
-    expect(github.mockOctokit.rest.git.updateRef).not.toHaveBeenCalled()
-    expect(github.mockOctokit.rest.git.createRef).not.toHaveBeenCalled()
-    expect(core.info).toHaveBeenCalledWith("Tag 'v1' exists, skipping.")
-    expect(core.setOutput).toHaveBeenCalledWith('created', [])
-    expect(core.setOutput).toHaveBeenCalledWith('updated', [])
-    expect(core.setOutput).toHaveBeenCalledWith('tags', [])
-  })
-
-  it('handles per-tag ref overrides', async () => {
-    setupInputs({
-      tags: 'v1:main,v2:develop',
-      ref: '',
-      github_token: 'test-token',
-      when_exists: 'update'
-    })
-    setupCommitResolver({
-      main: 'sha-main',
-      develop: 'sha-develop'
-    })
-    setupTagDoesNotExist()
-
-    await run()
-
-    expect(github.mockOctokit.rest.repos.getCommit).toHaveBeenCalledWith({
-      owner: 'test-owner',
-      repo: 'test-repo',
-      ref: 'main'
-    })
-    expect(github.mockOctokit.rest.repos.getCommit).toHaveBeenCalledWith({
-      owner: 'test-owner',
-      repo: 'test-repo',
-      ref: 'develop'
-    })
-
-    expect(github.mockOctokit.rest.git.createRef).toHaveBeenCalledWith({
-      owner: 'test-owner',
-      repo: 'test-repo',
-      ref: 'refs/tags/v1',
-      sha: 'sha-main'
-    })
-    expect(github.mockOctokit.rest.git.createRef).toHaveBeenCalledWith({
-      owner: 'test-owner',
-      repo: 'test-repo',
-      ref: 'refs/tags/v2',
-      sha: 'sha-develop'
-    })
-
-    expect(core.setOutput).toHaveBeenCalledWith('created', ['v1', 'v2'])
-  })
-
-  it('handles various input formats (newlines and whitespace)', async () => {
-    setupInputs({
-      tags: ' v1 \n v1.0 \n v1.0.1 ',
-      ref: 'abc123',
-      github_token: 'test-token',
-      when_exists: 'update'
-    })
-    setupCommitResolver('sha-abc123')
-    setupTagDoesNotExist()
-
-    await run()
-
-    expect(github.mockOctokit.rest.git.createRef).toHaveBeenCalledTimes(3)
-    expect(core.setOutput).toHaveBeenCalledWith('created', [
-      'v1',
-      'v1.0',
-      'v1.0.1'
-    ])
-  })
-
-  it('creates and updates tags in single run', async () => {
-    setupInputs({
-      tags: 'v1,v2',
-      ref: 'abc123',
-      github_token: 'test-token',
-      when_exists: 'update'
-    })
-    setupCommitResolver('sha-abc123')
-    setupTagExists('v1', 'sha-old')
-
-    await run()
-
-    expect(github.mockOctokit.rest.git.updateRef).toHaveBeenCalledTimes(1)
-    expect(github.mockOctokit.rest.git.createRef).toHaveBeenCalledTimes(1)
-    expect(core.setOutput).toHaveBeenCalledWith('created', ['v2'])
-    expect(core.setOutput).toHaveBeenCalledWith('updated', ['v1'])
-    expect(core.setOutput).toHaveBeenCalledWith('tags', ['v2', 'v1'])
-  })
-
-  it('fails when ref is missing', async () => {
-    setupInputs({
-      tags: 'v1',
-      ref: '',
-      github_token: 'test-token',
-      when_exists: 'update'
-    })
-
-    await run()
-
-    expect(core.setFailed).toHaveBeenCalledWith(
-      expect.stringContaining("Missing ref: provide 'ref' input")
-    )
-  })
-
-  it('fails when when_exists is fail and tag exists', async () => {
-    setupInputs({
-      tags: 'v1',
-      ref: 'abc123',
-      github_token: 'test-token',
-      when_exists: 'fail'
-    })
-    setupCommitResolver('sha-abc123')
-    setupTagExistsForAll('sha-old123')
-
-    await run()
-
-    expect(core.setFailed).toHaveBeenCalledWith("Tag 'v1' already exists.")
-    expect(github.mockOctokit.rest.git.updateRef).not.toHaveBeenCalled()
-    expect(github.mockOctokit.rest.git.createRef).not.toHaveBeenCalled()
-  })
-
-  it('fails when when_exists has invalid value', async () => {
-    setupInputs({
-      tags: 'v1',
-      ref: 'abc123',
-      github_token: 'test-token',
-      when_exists: 'invalid'
-    })
-    setupCommitResolver('sha-abc123')
-    setupTagExistsForAll('sha-old123')
-
-    await run()
-
-    expect(core.setFailed).toHaveBeenCalledWith(
-      expect.stringContaining("Invalid value for 'when_exists'")
-    )
-  })
-
-  it('handles non-404 errors when checking if tag exists', async () => {
-    setupInputs({
-      tags: 'v1',
-      ref: 'abc123',
-      github_token: 'test-token',
-      when_exists: 'update'
-    })
-    setupCommitResolver('sha-abc123')
-    github.mockOctokit.rest.git.getRef.mockRejectedValue({
-      status: 500,
-      message: 'Internal Server Error'
-    })
-
-    await run()
-
-    expect(core.setFailed).toHaveBeenCalledWith(
-      expect.stringContaining('Action failed with error')
-    )
-  })
-
-  it('handles errors when resolving ref to SHA', async () => {
-    setupInputs({
-      tags: 'v1',
-      ref: 'invalid-ref',
-      github_token: 'test-token',
-      when_exists: 'update'
-    })
-    github.mockOctokit.rest.repos.getCommit.mockRejectedValue(
-      new Error('Reference not found')
-    )
-
-    await run()
-
-    expect(core.setFailed).toHaveBeenCalledWith(
-      expect.stringContaining("Failed to resolve ref 'invalid-ref'")
-    )
-  })
-
-  it('handles non-Error thrown when parsing tags', async () => {
-    setupInputs({
-      tags: 'v1',
-      ref: 'abc123',
-      github_token: 'test-token',
-      when_exists: 'update'
-    })
-    csvParse.parse.mockImplementation(() => {
-      throw 'Parse error: not an Error instance'
-    })
-
-    await run()
-
-    expect(core.setFailed).toHaveBeenCalledWith(
-      'Parse error: not an Error instance'
-    )
-  })
-
-  it('defaults to update mode when when_exists is empty', async () => {
-    setupInputs({
-      tags: 'v1',
-      ref: 'abc123',
-      github_token: 'test-token',
-      when_exists: ''
-    })
-    setupCommitResolver('sha-abc123')
-    setupTagExistsForAll('sha-old123')
-
-    await run()
-
-    expect(github.mockOctokit.rest.git.updateRef).toHaveBeenCalledTimes(1)
-    expect(core.setOutput).toHaveBeenCalledWith('updated', ['v1'])
-  })
-
-  it('handles duplicate tags by using last occurrence', async () => {
-    setupInputs({
-      tags: 'v1,v2,v1',
-      ref: 'abc123',
-      github_token: 'test-token',
-      when_exists: 'update'
-    })
-    setupCommitResolver('sha-abc123')
-    setupTagDoesNotExist()
-
-    await run()
-
-    // Should only create 2 tags (v1 and v2), not 3
-    expect(github.mockOctokit.rest.git.createRef).toHaveBeenCalledTimes(2)
-    expect(core.setOutput).toHaveBeenCalledWith('created', ['v1', 'v2'])
-  })
-
-  it('optimizes by resolving unique refs only once', async () => {
-    setupInputs({
-      tags: 'v1:main,v2:main,v3:develop',
-      ref: '',
-      github_token: 'test-token',
-      when_exists: 'update'
-    })
-    setupCommitResolver({
-      main: 'sha-main',
-      develop: 'sha-develop'
-    })
-    setupTagDoesNotExist()
-
-    await run()
-
-    // Should only call getCommit 2 times (main and develop), not 3
-    expect(github.mockOctokit.rest.repos.getCommit).toHaveBeenCalledTimes(2)
-    expect(github.mockOctokit.rest.git.createRef).toHaveBeenCalledTimes(3)
-  })
-
-  it('handles tag with colon but empty ref part', async () => {
-    setupInputs({
-      tags: 'v1:,v2',
-      ref: 'abc123',
-      github_token: 'test-token',
-      when_exists: 'update'
-    })
-    setupCommitResolver('sha-abc123')
-    setupTagDoesNotExist()
-
-    await run()
-
-    // Both should use default ref
-    expect(github.mockOctokit.rest.git.createRef).toHaveBeenCalledTimes(2)
-    expect(core.setOutput).toHaveBeenCalledWith('created', ['v1', 'v2'])
-  })
-
-  it('fails when tag specification has multiple colons', async () => {
-    setupInputs({
-      tags: 'stable:refs/heads/main:latest',
-      ref: '',
-      github_token: 'test-token',
-      when_exists: 'update'
-    })
-
-    await run()
-
-    expect(core.setFailed).toHaveBeenCalledWith(
-      expect.stringContaining('Invalid tag specification')
-    )
-    expect(core.setFailed).toHaveBeenCalledWith(
-      expect.stringContaining('too many colons')
-    )
-  })
-
-  it('handles mixed scenario with multiple tags', async () => {
-    setupInputs({
-      tags: 'v1,v2,v3',
-      ref: 'abc123',
-      github_token: 'test-token',
-      when_exists: 'skip'
-    })
-    setupCommitResolver('sha-abc123')
-
-    // v1 exists, v2 and v3 don't
-    github.mockOctokit.rest.git.getRef.mockImplementation(
-      async (args: unknown) => {
-        const { ref } = args as { ref: string }
-        if (ref === 'tags/v1') {
-          return {
-            data: { ref: 'refs/tags/v1', object: { sha: 'sha-old' } }
-          }
-        }
-        throw { status: 404 }
-      }
-    )
-
-    await run()
-
-    // Should skip v1, create v2 and v3
-    expect(core.info).toHaveBeenCalledWith("Tag 'v1' exists, skipping.")
-    expect(github.mockOctokit.rest.git.createRef).toHaveBeenCalledTimes(2)
-    expect(core.setOutput).toHaveBeenCalledWith('created', ['v2', 'v3'])
-    expect(core.setOutput).toHaveBeenCalledWith('updated', [])
-  })
-
-  it('fails when tag name is empty (e.g., ":main")', async () => {
-    setupInputs({
-      tags: ':main',
-      ref: '',
-      github_token: 'test-token',
-      when_exists: 'update'
-    })
-    setupCommitResolver('sha-main')
-
-    await run()
-
-    expect(core.setFailed).toHaveBeenCalledWith("Invalid tag: ':main'")
-    expect(github.mockOctokit.rest.git.createRef).not.toHaveBeenCalled()
-    expect(github.mockOctokit.rest.git.updateRef).not.toHaveBeenCalled()
-  })
-
-  it('fails when one of multiple tags has empty name with ref', async () => {
-    setupInputs({
-      tags: 'v1,:develop,v2',
-      ref: 'abc123',
-      github_token: 'test-token',
-      when_exists: 'update'
-    })
-    setupCommitResolver({
-      abc123: 'sha-abc123',
-      develop: 'sha-develop'
-    })
-    setupTagDoesNotExist()
-
-    await run()
-
-    // Should fail on invalid tag during parsing, before processing any tags
-    expect(core.setFailed).toHaveBeenCalledWith("Invalid tag: ':develop'")
-    expect(github.mockOctokit.rest.git.createRef).not.toHaveBeenCalled()
-  })
-
-  it('fails when duplicate tag has different refs (explicit)', async () => {
-    setupInputs({
-      tags: 'v1:main,v1:develop',
-      ref: '',
-      github_token: 'test-token'
-    })
-
-    await run()
-
-    expect(core.setFailed).toHaveBeenCalledWith(
-      "Duplicate tag 'v1' with different refs: 'main' and 'develop'"
-    )
-    expect(github.mockOctokit.rest.git.createRef).not.toHaveBeenCalled()
-  })
-
-  it('fails when duplicate tag has different refs (default vs explicit)', async () => {
-    setupInputs({
-      tags: 'v1,v1:develop',
-      ref: 'main',
-      github_token: 'test-token'
-    })
-
-    await run()
-
-    expect(core.setFailed).toHaveBeenCalledWith(
-      "Duplicate tag 'v1' with different refs: 'main' and 'develop'"
-    )
-    expect(github.mockOctokit.rest.git.createRef).not.toHaveBeenCalled()
-  })
-
-  it('skips empty tags from double commas (e.g., "v1,,v2")', async () => {
-    setupInputs({
-      tags: 'v1,,v2',
-      ref: 'abc123',
-      github_token: 'test-token',
-      when_exists: 'update'
-    })
-    setupCommitResolver('sha-abc123')
-    setupTagDoesNotExist()
-
-    await run()
-
-    // Should skip empty tag and process v1 and v2
-    expect(github.mockOctokit.rest.git.createRef).toHaveBeenCalledWith({
-      owner: 'test-owner',
-      repo: 'test-repo',
-      ref: 'refs/tags/v1',
-      sha: 'sha-abc123'
-    })
-    expect(github.mockOctokit.rest.git.createRef).toHaveBeenCalledWith({
-      owner: 'test-owner',
-      repo: 'test-repo',
-      ref: 'refs/tags/v2',
-      sha: 'sha-abc123'
-    })
-    expect(github.mockOctokit.rest.git.createRef).toHaveBeenCalledTimes(2)
-    expect(core.setOutput).toHaveBeenCalledWith('created', ['v1', 'v2'])
-  })
-
-  it('skips empty lines in multi-line input (e.g., "v1\\n\\nv2")', async () => {
-    setupInputs({
-      tags: 'v1\n\nv2',
-      ref: 'abc123',
-      github_token: 'test-token',
-      when_exists: 'update'
-    })
-    setupCommitResolver('sha-abc123')
-    setupTagDoesNotExist()
-
-    await run()
-
-    // Should skip empty line and process v1 and v2
-    expect(github.mockOctokit.rest.git.createRef).toHaveBeenCalledWith({
-      owner: 'test-owner',
-      repo: 'test-repo',
-      ref: 'refs/tags/v1',
-      sha: 'sha-abc123'
-    })
-    expect(github.mockOctokit.rest.git.createRef).toHaveBeenCalledWith({
-      owner: 'test-owner',
-      repo: 'test-repo',
-      ref: 'refs/tags/v2',
-      sha: 'sha-abc123'
-    })
-    expect(github.mockOctokit.rest.git.createRef).toHaveBeenCalledTimes(2)
-    expect(core.setOutput).toHaveBeenCalledWith('created', ['v1', 'v2'])
-  })
-
-  it('skips empty tags from mix of empty CSV fields and empty lines', async () => {
-    setupInputs({
-      tags: 'v1,,v2\n\nv3,v4',
-      ref: 'abc123',
-      github_token: 'test-token',
-      when_exists: 'update'
-    })
-    setupCommitResolver('sha-abc123')
-    setupTagDoesNotExist()
-
-    await run()
-
-    // Should skip all empty tags and process v1, v2, v3, v4
-    expect(github.mockOctokit.rest.git.createRef).toHaveBeenCalledWith({
-      owner: 'test-owner',
-      repo: 'test-repo',
-      ref: 'refs/tags/v1',
-      sha: 'sha-abc123'
-    })
-    expect(github.mockOctokit.rest.git.createRef).toHaveBeenCalledWith({
-      owner: 'test-owner',
-      repo: 'test-repo',
-      ref: 'refs/tags/v2',
-      sha: 'sha-abc123'
-    })
-    expect(github.mockOctokit.rest.git.createRef).toHaveBeenCalledWith({
-      owner: 'test-owner',
-      repo: 'test-repo',
-      ref: 'refs/tags/v3',
-      sha: 'sha-abc123'
-    })
-    expect(github.mockOctokit.rest.git.createRef).toHaveBeenCalledWith({
-      owner: 'test-owner',
-      repo: 'test-repo',
-      ref: 'refs/tags/v4',
-      sha: 'sha-abc123'
-    })
-    expect(github.mockOctokit.rest.git.createRef).toHaveBeenCalledTimes(4)
-    expect(core.setOutput).toHaveBeenCalledWith('created', [
-      'v1',
-      'v2',
-      'v3',
-      'v4'
-    ])
-  })
-})

action.yml

@@ -20,6 +20,12 @@ inputs:
       'fail'.
     required: false
     default: "update"
+  annotation:
+    description: >-
+      Optional annotation message for tags. If provided, creates annotated tags.
+      If empty, creates lightweight tags.
+    required: false
+    default: ""
   github_token:
     description: "The GitHub token to use for authentication."
     required: false
@@ -32,6 +38,8 @@ outputs:
     description: "List of tags that were created."
   updated:
     description: "List of tags that were updated."
+  skipped:
+    description: "List of tags that were skipped."
 
 runs:
   using: node24

package-lock.json

@@ -1,12 +1,12 @@
 {
   "name": "update-tags-action",
-  "version": "1.0.1",
+  "version": "2.2.0",
   "lockfileVersion": 3,
   "requires": true,
   "packages": {
     "": {
       "name": "update-tags-action",
-      "version": "1.0.1",
+      "version": "2.2.0",
       "dependencies": {
         "@actions/core": "^1.11.1",
         "@actions/github": "^6.0.1",

package.json

@@ -1,6 +1,6 @@
 {
   "name": "update-tags-action",
-  "version": "1.0.1",
+  "version": "2.2.0",
   "author": "jimeh",
   "type": "module",
   "private": true,

src/inputs.ts

@@ -1,16 +1,18 @@
 import * as core from '@actions/core'
 import * as github from '@actions/github'
-import { parseTagsInput, type Tag } from './tags.js'
+import { parse } from 'csv-parse/sync'
 
 const WHEN_EXISTS_MODES = ['update', 'skip', 'fail'] as const
 export type WhenExistsMode = (typeof WHEN_EXISTS_MODES)[number]
 
 export interface Inputs {
-  tags: Tag[]
+  tags: string[]
+  defaultRef: string
   whenExists: WhenExistsMode
+  annotation: string
   owner: string
   repo: string
-  octokit: ReturnType<typeof github.getOctokit>
+  token: string
 }
 
 /**
@@ -35,25 +37,34 @@ function validateWhenExists(input: string): WhenExistsMode {
  *
  * @returns Parsed and validated inputs
  */
-export async function getInputs(): Promise<Inputs> {
+export function getInputs(): Inputs {
   const tagsInput: string = core.getInput('tags', { required: true })
   const defaultRef: string = core.getInput('ref')
   const whenExistsInput = core.getInput('when_exists') || 'update'
   const whenExists = validateWhenExists(whenExistsInput)
+  const annotation: string = core.getInput('annotation')
   const token: string = core.getInput('github_token', {
     required: true
   })
 
-  const octokit = github.getOctokit(token)
   const { owner, repo } = github.context.repo
 
-  const tags = await parseTagsInput(octokit, tagsInput, defaultRef, owner, repo)
+  // Parse tags as CSV/newline delimited strings
+  const tags = (
+    parse(tagsInput, {
+      delimiter: ',',
+      trim: true,
+      relax_column_count: true
+    }) as string[][]
+  ).flat()
 
   return {
     tags,
+    defaultRef,
     whenExists,
+    annotation,
     owner,
     repo,
-    octokit
+    token
   }
 }

src/main.ts

@@ -1,6 +1,7 @@
 import * as core from '@actions/core'
+import * as github from '@actions/github'
 import { getInputs } from './inputs.js'
-import { processTag } from './tags.js'
+import { planTagOperations, executeTagOperation } from './tags.js'
 
 /**
  * The main function for the action.
@@ -9,38 +10,33 @@ import { processTag } from './tags.js'
  */
 export async function run(): Promise<void> {
   try {
-    let inputs
-    try {
-      inputs = await getInputs()
-    } catch (error) {
-      // For parsing/validation errors, pass message directly.
-      const message = error instanceof Error ? error.message : String(error)
-      core.setFailed(message)
-      return
-    }
-
-    const { tags, whenExists, owner, repo, octokit } = inputs
+    const inputs = getInputs()
+    const octokit = github.getOctokit(inputs.token)
+    const operations = await planTagOperations(inputs, octokit)
 
     const created: string[] = []
     const updated: string[] = []
+    const skipped: string[] = []
 
-    // Create or update all tags.
-    for (const tag of tags) {
-      const result = await processTag(tag, whenExists, owner, repo, octokit)
+    // Execute all planned operations.
+    for (const operation of operations) {
+      await executeTagOperation(operation, octokit)
 
-      if (result === 'failed') {
-        return
-      } else if (result === 'created') {
-        created.push(tag.name)
-      } else if (result === 'updated') {
-        updated.push(tag.name)
+      if (operation.operation === 'create') {
+        created.push(operation.name)
+      } else if (operation.operation === 'update') {
+        updated.push(operation.name)
+      } else if (operation.operation === 'skip') {
+        skipped.push(operation.name)
       }
     }
 
     core.setOutput('created', created)
     core.setOutput('updated', updated)
+    core.setOutput('skipped', skipped)
     core.setOutput('tags', created.concat(updated))
   } catch (error) {
-    core.setFailed(`Action failed with error: ${String(error)}`)
+    const message = error instanceof Error ? error.message : String(error)
+    core.setFailed(message)
   }
 }

src/tags.ts

@@ -1,44 +1,63 @@
 import * as core from '@actions/core'
 import * as github from '@actions/github'
-import { parse } from 'csv-parse/sync'
+import type { Inputs } from './inputs.js'
 
-export interface Tag {
+export interface ExistingTagInfo {
+  commitSHA: string
+  isAnnotated: boolean
+  annotation?: string
+}
+
+interface BaseOperation {
   name: string
   ref: string
   sha: string
+  owner: string
+  repo: string
 }
 
-export type TagResult = 'created' | 'updated' | 'skipped' | 'failed'
+export interface CreateOperation extends BaseOperation {
+  operation: 'create'
+  annotation: string
+}
+
+export interface UpdateOperation extends BaseOperation {
+  operation: 'update'
+  annotation: string
+  existingSHA: string
+  existingIsAnnotated: boolean
+  reasons: string[]
+}
+
+export interface SkipOperation extends BaseOperation {
+  operation: 'skip'
+  existingIsAnnotated: boolean
+  reason: 'when_exists_skip' | 'already_matches'
+}
+
+export type TagOperation = CreateOperation | UpdateOperation | SkipOperation
+
+interface Context {
+  owner: string
+  repo: string
+  octokit: ReturnType<typeof github.getOctokit>
+}
 
 /**
- * Parse tags input string and resolve refs to SHAs.
+ * Plan tag operations based on inputs.
  *
+ * @param inputs - The validated inputs containing tags, refs, and configuration
  * @param octokit - The GitHub API client
- * @param tagsInput - The raw tags input string
- * @param defaultRef - The default ref to use if not specified per-tag
- * @param owner - The repository owner
- * @param repo - The repository name
- * @returns Array of desired tags with resolved SHAs
+ * @returns Array of planned tag operations (create, update, or skip)
  */
-export async function parseTagsInput(
-  octokit: ReturnType<typeof github.getOctokit>,
-  tagsInput: string,
-  defaultRef: string,
-  owner: string,
-  repo: string
-): Promise<Tag[]> {
-  const parsedTags: string[] = (
-    parse(tagsInput, {
-      delimiter: ',',
-      trim: true,
-      relax_column_count: true
-    }) as string[][]
-  ).flat()
-
+export async function planTagOperations(
+  inputs: Inputs,
+  octokit: ReturnType<typeof github.getOctokit>
+): Promise<TagOperation[]> {
   const uniqueRefs = new Set<string>()
-  const tags: Record<string, string> = {}
+  const tagRefs: Record<string, string> = {}
 
-  for (const tag of parsedTags) {
+  for (const tag of inputs.tags) {
     const parts = tag.split(':').map((s) => s.trim())
     if (parts.length > 2) {
       throw new Error(
@@ -55,130 +74,221 @@ export async function parseTagsInput(
       continue
     }
 
-    const ref = tagRef || defaultRef
+    const ref = tagRef || inputs.defaultRef
     if (!ref) {
       throw new Error("Missing ref: provide 'ref' input or specify per-tag ref")
     }
 
-    // Check for duplicate tag with different ref.
-    if (tags[tagName] && tags[tagName] !== ref) {
+    // Check for duplicate tag with different ref
+    if (tagRefs[tagName] && tagRefs[tagName] !== ref) {
       throw new Error(
         `Duplicate tag '${tagName}' with different refs: ` +
-          `'${tags[tagName]}' and '${ref}'`
+          `'${tagRefs[tagName]}' and '${ref}'`
       )
     }
 
-    tags[tagName] = ref
+    tagRefs[tagName] = ref
     uniqueRefs.add(ref)
   }
 
   // Pre-resolve all unique refs in parallel.
-  const refToSha: Record<string, string> = {}
+  const ctx: Context = { owner: inputs.owner, repo: inputs.repo, octokit }
+  const refSHAs: Record<string, string> = {}
   await Promise.all(
     Array.from(uniqueRefs).map(async (ref) => {
-      refToSha[ref] = await resolveRefToSha(octokit, owner, repo, ref)
+      refSHAs[ref] = await resolveRefToSha(ctx, ref)
     })
   )
 
-  // Build result array with resolved SHAs.
-  const result: Tag[] = []
-  for (const tagName in tags) {
-    const tagRef = tags[tagName]
-    result.push({
-      name: tagName,
-      ref: tagRef,
-      sha: refToSha[tagRef]
+  // Build result array with planned operations
+  const tagNames = Object.keys(tagRefs)
+  const result: TagOperation[] = await Promise.all(
+    tagNames.map(async (tagName) => {
+      const tagRef = tagRefs[tagName]
+      const sha = refSHAs[tagRef]
+
+      // Check if tag already exists
+      let existing: ExistingTagInfo | undefined
+      try {
+        existing = await fetchTagInfo(ctx, tagName)
+
+        // Fail early if when_exists is 'fail'
+        if (inputs.whenExists === 'fail') {
+          throw new Error(`Tag '${tagName}' already exists.`)
+        }
+      } catch (error: unknown) {
+        // Check if it's a GitHub API error with a status property
+        if (typeof error === 'object' && error !== null && 'status' in error) {
+          const apiError = error as { status: number; message?: string }
+          if (apiError.status === 404) {
+            // Tag doesn't exist, existing remains undefined
+          } else {
+            // Some other API error
+            throw new Error(
+              `Failed to check if tag '${tagName}' exists: ${apiError.message || String(error)}`
+            )
+          }
+        } else {
+          throw error
+        }
+      }
+
+      const baseOp = {
+        name: tagName,
+        ref: tagRef,
+        sha,
+        owner: inputs.owner,
+        repo: inputs.repo
+      }
+
+      // Tag doesn't exist - plan creation
+      if (!existing) {
+        return {
+          ...baseOp,
+          operation: 'create',
+          annotation: inputs.annotation
+        } as CreateOperation
+      }
+
+      // Tag exists - determine operation based on mode and state
+      if (inputs.whenExists === 'skip') {
+        return {
+          ...baseOp,
+          operation: 'skip',
+          existingIsAnnotated: existing.isAnnotated,
+          reason: 'when_exists_skip'
+        } as SkipOperation
+      }
+
+      // whenExists === 'update' - check if update is needed
+      const { commitMatches, annotationMatches } = compareTagState(
+        sha,
+        inputs.annotation,
+        existing
+      )
+
+      if (commitMatches && annotationMatches) {
+        return {
+          ...baseOp,
+          operation: 'skip',
+          existingIsAnnotated: existing.isAnnotated,
+          reason: 'already_matches'
+        } as SkipOperation
+      }
+
+      // Plan update with reasons
+      const reasons = getUpdateReasons(sha, inputs.annotation, existing)
+      return {
+        ...baseOp,
+        operation: 'update',
+        annotation: inputs.annotation,
+        existingSHA: existing.commitSHA,
+        existingIsAnnotated: existing.isAnnotated,
+        reasons
+      } as UpdateOperation
     })
-  }
+  )
 
   return result
 }
 
 /**
- * Process a single desired tag: create or update it based on configuration.
+ * Execute a planned tag operation.
  *
- * @param tag - The desired tag to process
- * @param whenExists - What to do if the tag already exists
- * @param owner - Repository owner
- * @param repo - Repository name
+ * @param operation - The planned tag operation to execute
  * @param octokit - GitHub API client
- * @returns The result of the tag operation
  */
-export async function processTag(
-  tag: Tag,
-  whenExists: 'update' | 'skip' | 'fail',
-  owner: string,
-  repo: string,
+export async function executeTagOperation(
+  operation: TagOperation,
   octokit: ReturnType<typeof github.getOctokit>
-): Promise<TagResult> {
-  const { name: tagName, sha } = tag
+): Promise<void> {
+  const ctx: Context = {
+    owner: operation.owner,
+    repo: operation.repo,
+    octokit
+  }
 
-  try {
-    // Check if the tag exists.
-    const existing = await octokit.rest.git.getRef({
-      owner,
-      repo,
-      ref: `tags/${tagName}`
-    })
-
-    // If the tag exists, decide action based on 'when_exists'.
-    if (whenExists === 'update') {
-      const existingSHA = existing.data.object.sha
-      if (existingSHA === sha) {
-        core.info(`Tag '${tagName}' already exists with desired SHA ${sha}.`)
-        return 'skipped'
-      }
-
-      core.info(
-        `Tag '${tagName}' exists, updating to SHA ${sha} ` +
-          `(was ${existingSHA}).`
-      )
-      await octokit.rest.git.updateRef({
-        owner,
-        repo,
-        ref: `tags/${tagName}`,
-        sha,
-        force: true
-      })
-      return 'updated'
-    } else if (whenExists === 'skip') {
-      core.info(`Tag '${tagName}' exists, skipping.`)
-      return 'skipped'
+  if (operation.operation === 'skip') {
+    if (operation.reason === 'when_exists_skip') {
+      core.info(`Tag '${operation.name}' exists, skipping.`)
     } else {
-      // whenExists === 'fail'
-      core.setFailed(`Tag '${tagName}' already exists.`)
-      return 'failed'
-    }
-  } catch (error: unknown) {
-    const err = error as { status?: number }
-    if (err?.status !== 404) {
-      throw error
+      core.info(
+        `Tag '${operation.name}' already exists with desired commit SHA ${operation.sha}` +
+          (operation.existingIsAnnotated ? ' (annotated).' : '.')
+      )
     }
+    return
+  }
 
-    // If the tag doesn't exist (404), create it.
-    core.info(`Tag '${tagName}' does not exist, creating with SHA ${sha}.`)
-    await octokit.rest.git.createRef({
-      owner,
-      repo,
-      ref: `refs/tags/${tagName}`,
-      sha
-    })
-    return 'created'
+  if (operation.operation === 'create') {
+    await createTag(ctx, operation)
+    return
+  }
+
+  if (operation.operation === 'update') {
+    await updateExistingTag(ctx, operation)
+    return
+  }
+
+  throw new Error(
+    `Unknown operation type: ${(operation as TagOperation).operation}`
+  )
+}
+
+/**
+ * Fetch information about an existing tag, dereferencing if annotated.
+ *
+ * @param ctx - Operation context
+ * @param tagName - The name of the tag to fetch
+ * @returns Information about the existing tag
+ */
+async function fetchTagInfo(
+  ctx: Context,
+  tagName: string
+): Promise<ExistingTagInfo> {
+  const ref = await ctx.octokit.rest.git.getRef({
+    owner: ctx.owner,
+    repo: ctx.repo,
+    ref: `tags/${tagName}`
+  })
+  const object = ref.data.object
+  const isAnnotated = object.type === 'tag'
+
+  if (!isAnnotated) {
+    return {
+      commitSHA: object.sha,
+      isAnnotated: false
+    }
+  }
+
+  // Dereference annotated tag to get underlying commit
+  const tagRef = await ctx.octokit.rest.git.getTag({
+    owner: ctx.owner,
+    repo: ctx.repo,
+    tag_sha: object.sha
+  })
+
+  return {
+    commitSHA: tagRef.data.object.sha,
+    isAnnotated: true,
+    annotation: tagRef.data.message
   }
 }
 
-async function resolveRefToSha(
-  octokit: ReturnType<typeof github.getOctokit>,
-  owner: string,
-  repo: string,
-  ref: string
-): Promise<string> {
+/**
+ * Resolve a ref to a SHA.
+ *
+ * @param ctx - Operation context
+ * @param ref - The ref to resolve
+ * @returns The SHA
+ */
+async function resolveRefToSha(ctx: Context, ref: string): Promise<string> {
   try {
     const {
       data: { sha }
-    } = await octokit.rest.repos.getCommit({
-      owner,
-      repo,
+    } = await ctx.octokit.rest.repos.getCommit({
+      owner: ctx.owner,
+      repo: ctx.repo,
       ref
     })
 
@@ -187,3 +297,165 @@ async function resolveRefToSha(
     throw new Error(`Failed to resolve ref '${ref}' to a SHA: ${String(error)}`)
   }
 }
+
+/**
+ * Update an existing tag to point to a new commit and/or annotation.
+ */
+async function updateExistingTag(
+  ctx: Context,
+  operation: UpdateOperation
+): Promise<void> {
+  const commitMatches = operation.existingSHA === operation.sha
+
+  if (commitMatches) {
+    core.info(
+      `Tag '${operation.name}' exists with same commit but ${operation.reasons.join(', ')}.`
+    )
+  } else {
+    core.info(
+      `Tag '${operation.name}' exists` +
+        `${operation.existingIsAnnotated ? ' (annotated)' : ''}` +
+        `, updating to ${operation.reasons.join(', ')}.`
+    )
+  }
+
+  const targetSha = await resolveTargetSHA(
+    ctx,
+    operation.name,
+    operation.sha,
+    operation.annotation
+  )
+
+  await ctx.octokit.rest.git.updateRef({
+    owner: ctx.owner,
+    repo: ctx.repo,
+    ref: `tags/${operation.name}`,
+    sha: targetSha,
+    force: true
+  })
+}
+
+/**
+ * Create a tag (doesn't exist yet).
+ */
+async function createTag(
+  ctx: Context,
+  operation: CreateOperation
+): Promise<void> {
+  core.info(
+    `Tag '${operation.name}' does not exist, creating with commit SHA ${operation.sha}.`
+  )
+
+  const targetSha = await resolveTargetSHA(
+    ctx,
+    operation.name,
+    operation.sha,
+    operation.annotation
+  )
+
+  await ctx.octokit.rest.git.createRef({
+    owner: ctx.owner,
+    repo: ctx.repo,
+    ref: `refs/tags/${operation.name}`,
+    sha: targetSha
+  })
+}
+
+/**
+ * Resolve the target SHA for a tag (creates annotated tag object if needed).
+ *
+ * @param ctx - Operation context
+ * @param tagName - The tag name
+ * @param commitSha - The commit SHA
+ * @param annotation - The annotation message (if any)
+ * @returns The SHA to use (tag object SHA if annotated, commit SHA otherwise)
+ */
+async function resolveTargetSHA(
+  ctx: Context,
+  tagName: string,
+  commitSha: string,
+  annotation: string
+): Promise<string> {
+  if (!annotation) {
+    return commitSha
+  }
+
+  const tagObject = await ctx.octokit.rest.git.createTag({
+    owner: ctx.owner,
+    repo: ctx.repo,
+    tag: tagName,
+    message: annotation,
+    object: commitSha,
+    type: 'commit'
+  })
+
+  return tagObject.data.sha
+}
+
+/**
+ * Compare existing tag state with desired target state.
+ *
+ * @param sha - The desired commit SHA
+ * @param annotation - The desired annotation
+ * @param existing - Information about the existing tag
+ * @returns Object indicating whether commit and annotation match
+ */
+function compareTagState(
+  sha: string,
+  annotation: string,
+  existing: ExistingTagInfo
+): {
+  commitMatches: boolean
+  annotationMatches: boolean
+} {
+  const isAnnotated = existing.isAnnotated === true
+
+  const commitMatches = existing.commitSHA === sha
+  const annotationMatches =
+    (isAnnotated && !!annotation && existing.annotation === annotation) ||
+    (!isAnnotated && !annotation) ||
+    false
+
+  return { commitMatches, annotationMatches }
+}
+
+/**
+ * Get update reason messages based on what changed.
+ *
+ * @param sha - The desired commit SHA
+ * @param annotation - The desired annotation
+ * @param existing - Information about the existing tag
+ * @returns Array of reason strings
+ */
+function getUpdateReasons(
+  sha: string,
+  annotation: string,
+  existing: ExistingTagInfo
+): string[] {
+  const { commitMatches, annotationMatches } = compareTagState(
+    sha,
+    annotation,
+    existing
+  )
+  const reasons: string[] = []
+
+  if (!commitMatches) {
+    reasons.push(`commit SHA ${sha} (was ${existing.commitSHA})`)
+  }
+
+  if (!annotationMatches && annotation) {
+    if (existing.isAnnotated === true) {
+      reasons.push('annotation message changed')
+    } else {
+      reasons.push('adding annotation')
+    }
+  } else if (
+    !annotationMatches &&
+    !annotation &&
+    existing.isAnnotated === true
+  ) {
+    reasons.push('removing annotation')
+  }
+
+  return reasons
+}

tests/fixtures/github.ts

@@ -5,7 +5,9 @@ export const mockOctokit = {
     git: {
       getRef: jest.fn<(args: unknown) => Promise<unknown>>(),
       createRef: jest.fn<(args: unknown) => Promise<unknown>>(),
-      updateRef: jest.fn<(args: unknown) => Promise<unknown>>()
+      updateRef: jest.fn<(args: unknown) => Promise<unknown>>(),
+      createTag: jest.fn<(args: unknown) => Promise<unknown>>(),
+      getTag: jest.fn<(args: unknown) => Promise<unknown>>()
     },
     repos: {
       getCommit: jest.fn<(args: unknown) => Promise<unknown>>()

tests/tags.test.ts

@@ -0,0 +1,37 @@
+/**
+ * Unit tests for tag operation execution, src/tags.ts
+ */
+import { jest } from '@jest/globals'
+import * as core from './fixtures/core.js'
+import * as github from './fixtures/github.js'
+
+// Mocks should be declared before the module being tested is imported.
+jest.unstable_mockModule('@actions/core', () => core)
+jest.unstable_mockModule('@actions/github', () => github)
+
+// The module being tested should be imported dynamically.
+const { executeTagOperation } = await import('../src/tags.js')
+import type { TagOperation } from '../src/tags.js'
+
+describe('executeTagOperation', () => {
+  beforeEach(() => {
+    jest.resetAllMocks()
+    github.getOctokit.mockReturnValue(github.mockOctokit)
+  })
+
+  it('throws error for unknown operation type', async () => {
+    const invalidOperation = {
+      operation: 'invalid',
+      name: 'v1',
+      ref: 'main',
+      sha: 'abc123',
+      owner: 'test-owner',
+      repo: 'test-repo'
+    } as unknown as TagOperation
+
+    await expect(
+      // eslint-disable-next-line @typescript-eslint/no-explicit-any
+      executeTagOperation(invalidOperation, github.mockOctokit as any)
+    ).rejects.toThrow('Unknown operation type: invalid')
+  })
+})

tsconfig.eslint.json

@@ -7,8 +7,7 @@
   },
   "exclude": ["dist", "node_modules"],
   "include": [
-    "__fixtures__",
-    "__tests__",
+    "tests",
     "src",
     "eslint.config.mjs",
     "jest.config.js",

tsconfig.json

@@ -6,6 +6,6 @@
     "moduleResolution": "NodeNext",
     "outDir": "./dist"
   },
-  "exclude": ["__fixtures__", "__tests__", "coverage", "dist", "node_modules"],
+  "exclude": ["tests", "coverage", "dist", "node_modules"],
   "include": ["src"]
 }