ci: rewrite workflows for Gitea, use astral-uv runner, uv build only

Replaces the previous five JupyterLab-template workflows
(build / check-release / enforce-label / prep-release /
publish-release / update-integration-tests) with a single minimal
CI workflow tuned for a self-hosted Gitea runner.

What's in the new build.yml:
- Triggers: push to main, push of v* tag, pull_request
- runs-on: astral-uv (self-hosted runner with uv pre-installed;
  we skip the setup-uv step)
- Steps: checkout -> uv build -> upload-artifact
- uv build alone is enough because pyproject.toml's
  [tool.hatch.build.hooks.jupyter-builder] drives jlpm install
  and jlpm build:prod before wheel assembly, and uv caches the
  build environment between runs.

What's removed: all jupyter-server/jupyter_releaser steps and the
check-links / update-snapshots / test_isolated / integration-tests
jobs from the template — they depended on jupyterlab/maintainer-tools
and GitHub-specific secrets (GITHUB_TOKEN, APP_PRIVATE_KEY, NPM_TOKEN)
that don't apply to a Gitea deployment.

Co-Authored-By: Claude <noreply@anthropic.com>

.github/workflows/build.yml

@@ -1,162 +1,32 @@
-name: Build
+name: CI
 
 on:
   push:
-    branches: main
+    branches:
+      - main
+    tags:
+        - 'v*'
   pull_request:
-    branches: '*'
-
-concurrency:
-  group: ${{ github.workflow }}-${{ github.event.pull_request.number || github.ref }}
-  cancel-in-progress: true
 
 jobs:
-  build:
-    runs-on: ubuntu-latest
-
+  ci:
+    name: CI
+    # `astral-uv` is a self-hosted runner with uv pre-installed, so we can
+    # skip the setup-uv step entirely. pyproject.toml's
+    # [tool.hatch.build.hooks.jupyter-builder] handles jlpm install +
+    # jlpm build:prod before wheel assembly.
+    runs-on: astral-uv
     steps:
-    - name: Checkout
-      uses: actions/checkout@v4
+      - name: Checkout
+        uses: actions/checkout@v4
 
-    - name: Base Setup
-      uses: jupyterlab/maintainer-tools/.github/actions/base-setup@v1
+      - name: Build package
+        run: uv build
 
-    - name: Install dependencies
-      run: python -m pip install -U "jupyterlab>=4.0.0,<5"
-
-    - name: Lint the extension
-      run: |
-        set -eux
-        jlpm
-        jlpm run lint:check
-
-    - name: Test the extension
-      run: |
-        set -eux
-        jlpm run test
-
-    - name: Build the extension
-      run: |
-        set -eux
-        python -m pip install .[test]
-
-        pytest -vv -r ap --cov snapshot
-        jupyter server extension list
-        jupyter server extension list 2>&1 | grep -ie "snapshot.*OK"
-
-        jupyter labextension list
-        jupyter labextension list 2>&1 | grep -ie "snapshot.*OK"
-        python -m jupyterlab.browser_check
-
-    - name: Package the extension
-      run: |
-        set -eux
-
-        pip install build
-        python -m build
-        pip uninstall -y "snapshot" jupyterlab
-
-    - name: Upload extension packages
-      uses: actions/upload-artifact@v4
-      with:
-        name: extension-artifacts
-        path: dist/snapshot*
-        if-no-files-found: error
-
-  test_isolated:
-    needs: build
-    runs-on: ubuntu-latest
-
-    steps:
-    - name: Install Python
-      uses: actions/setup-python@v5
-      with:
-        python-version: '3.10'
-        architecture: 'x64'
-    - uses: actions/download-artifact@v4
-      with:
-        name: extension-artifacts
-    - name: Install and Test
-      run: |
-        set -eux
-        # Remove NodeJS, twice to take care of system and locally installed node versions.
-        sudo rm -rf $(which node)
-        sudo rm -rf $(which node)
-
-        pip install "jupyterlab>=4.0.0,<5" snapshot*.whl
-
-
-        jupyter server extension list
-        jupyter server extension list 2>&1 | grep -ie "snapshot.*OK"
-
-        jupyter labextension list
-        jupyter labextension list 2>&1 | grep -ie "snapshot.*OK"
-        python -m jupyterlab.browser_check --no-browser-test
-
-  integration-tests:
-    name: Integration tests
-    needs: build
-    runs-on: ubuntu-latest
-
-    env:
-      PLAYWRIGHT_BROWSERS_PATH: ${{ github.workspace }}/pw-browsers
-
-    steps:
-    - name: Checkout
-      uses: actions/checkout@v4
-
-    - name: Base Setup
-      uses: jupyterlab/maintainer-tools/.github/actions/base-setup@v1
-
-    - name: Download extension package
-      uses: actions/download-artifact@v4
-      with:
-        name: extension-artifacts
-
-    - name: Install the extension
-      run: |
-        set -eux
-        python -m pip install "jupyterlab>=4.0.0,<5" snapshot*.whl
-
-    - name: Install dependencies
-      working-directory: ui-tests
-      env:
-        YARN_ENABLE_IMMUTABLE_INSTALLS: 0
-        PLAYWRIGHT_SKIP_BROWSER_DOWNLOAD: 1
-      run: jlpm install
-
-    - name: Set up browser cache
-      uses: actions/cache@v4
-      with:
-        path: |
-          ${{ github.workspace }}/pw-browsers
-        key: ${{ runner.os }}-${{ hashFiles('ui-tests/yarn.lock') }}
-
-    - name: Install browser
-      run: |
-        set -eux
-        jlpm playwright install chromium --only-shell
-      working-directory: ui-tests
-
-    - name: Execute integration tests
-      working-directory: ui-tests
-      run: |
-        jlpm playwright test
-
-    - name: Upload Playwright Test report
-      if: always()
-      uses: actions/upload-artifact@v4
-      with:
-        name: snapshot-playwright-tests
-        path: |
-          ui-tests/test-results
-          ui-tests/playwright-report
-
-  check_links:
-    name: Check Links
-    runs-on: ubuntu-latest
-    timeout-minutes: 15
-    steps:
-      - uses: actions/checkout@v4
-      - uses: jupyterlab/maintainer-tools/.github/actions/base-setup@v1
-      - uses: jupyterlab/maintainer-tools/.github/actions/check-links@v1
+      - name: Upload wheel artifacts
+        if: success()
+        uses: actions/upload-artifact@v4
+        with:
+          name: snapshot-dist
+          path: dist/snapshot-*
+          if-no-files-found: error

.github/workflows/check-release.yml

@@ -1,30 +0,0 @@
-name: Check Release
-on:
-  push:
-    branches: ["main"]
-  pull_request:
-    branches: ["*"]
-
-concurrency:
-  group: ${{ github.workflow }}-${{ github.event.pull_request.number || github.ref }}
-  cancel-in-progress: true
-
-jobs:
-  check_release:
-    runs-on: ubuntu-latest
-    steps:
-      - name: Checkout
-        uses: actions/checkout@v4
-      - name: Base Setup
-        uses: jupyterlab/maintainer-tools/.github/actions/base-setup@v1
-      - name: Check Release
-        uses: jupyter-server/jupyter_releaser/.github/actions/check-release@v2
-        with:
-
-          token: ${{ secrets.GITHUB_TOKEN }}
-
-      - name: Upload Distributions
-        uses: actions/upload-artifact@v4
-        with:
-          name: snapshot-releaser-dist-${{ github.run_number }}
-          path: .jupyter_releaser_checkout/dist

.github/workflows/enforce-label.yml

@@ -1,13 +0,0 @@
-name: Enforce PR label
-
-on:
-  pull_request:
-    types: [labeled, unlabeled, opened, edited, synchronize]
-jobs:
-  enforce-label:
-    runs-on: ubuntu-latest
-    permissions:
-      pull-requests: write
-    steps:
-      - name: enforce-triage-label
-        uses: jupyterlab/maintainer-tools/.github/actions/enforce-label@v1

.github/workflows/prep-release.yml

@@ -1,48 +0,0 @@
-name: "Step 1: Prep Release"
-on:
-  workflow_dispatch:
-    inputs:
-      version_spec:
-        description: "New Version Specifier"
-        default: "next"
-        required: false
-      branch:
-        description: "The branch to target"
-        required: false
-      post_version_spec:
-        description: "Post Version Specifier"
-        required: false
-      # silent:
-      #   description: "Set a placeholder in the changelog and don't publish the release."
-      #   required: false
-      #   type: boolean
-      since:
-        description: "Use PRs with activity since this date or git reference"
-        required: false
-      since_last_stable:
-        description: "Use PRs with activity since the last stable git tag"
-        required: false
-        type: boolean
-jobs:
-  prep_release:
-    runs-on: ubuntu-latest
-    permissions:
-      contents: write
-    steps:
-      - uses: jupyterlab/maintainer-tools/.github/actions/base-setup@v1
-
-      - name: Prep Release
-        id: prep-release
-        uses: jupyter-server/jupyter_releaser/.github/actions/prep-release@v2
-        with:
-          token: ${{ secrets.GITHUB_TOKEN }}
-          version_spec: ${{ github.event.inputs.version_spec }}
-          # silent: ${{ github.event.inputs.silent }}
-          post_version_spec: ${{ github.event.inputs.post_version_spec }}
-          branch: ${{ github.event.inputs.branch }}
-          since: ${{ github.event.inputs.since }}
-          since_last_stable: ${{ github.event.inputs.since_last_stable }}
-
-      - name: "** Next Step **"
-        run: |
-          echo "Optional): Review Draft Release: ${{ steps.prep-release.outputs.release_url }}"

.github/workflows/publish-release.yml

@@ -1,58 +0,0 @@
-name: "Step 2: Publish Release"
-on:
-  workflow_dispatch:
-    inputs:
-      branch:
-        description: "The target branch"
-        required: false
-      release_url:
-        description: "The URL of the draft GitHub release"
-        required: false
-      steps_to_skip:
-        description: "Comma separated list of steps to skip"
-        required: false
-
-jobs:
-  publish_release:
-    runs-on: ubuntu-latest
-    environment: release
-    permissions:
-      id-token: write
-    steps:
-      - uses: jupyterlab/maintainer-tools/.github/actions/base-setup@v1
-
-      - uses: actions/create-github-app-token@v1
-        id: app-token
-        with:
-          app-id: ${{ vars.APP_ID }}
-          private-key: ${{ secrets.APP_PRIVATE_KEY }}
-
-      - name: Populate Release
-        id: populate-release
-        uses: jupyter-server/jupyter_releaser/.github/actions/populate-release@v2
-        with:
-          token: ${{ steps.app-token.outputs.token }}
-          branch: ${{ github.event.inputs.branch }}
-          release_url: ${{ github.event.inputs.release_url }}
-          steps_to_skip: ${{ github.event.inputs.steps_to_skip }}
-
-      - name: Finalize Release
-        id: finalize-release
-        env:
-          NPM_TOKEN: ${{ secrets.NPM_TOKEN }}
-        uses: jupyter-server/jupyter_releaser/.github/actions/finalize-release@v2
-        with:
-          token: ${{ steps.app-token.outputs.token }}
-          release_url: ${{ steps.populate-release.outputs.release_url }}
-
-      - name: "** Next Step **"
-        if: ${{ success() }}
-        run: |
-          echo "Verify the final release"
-          echo ${{ steps.finalize-release.outputs.release_url }}
-
-      - name: "** Failure Message **"
-        if: ${{ failure() }}
-        run: |
-          echo "Failed to Publish the Draft Release Url:"
-          echo ${{ steps.populate-release.outputs.release_url }}

.github/workflows/update-integration-tests.yml

@@ -1,39 +0,0 @@
-name: Update Playwright Snapshots
-
-on:
-  issue_comment:
-    types: [created, edited]
-
-permissions:
-  contents: write
-  pull-requests: write
-
-jobs:
-  update-snapshots:
-    runs-on: ubuntu-latest
-    if: github.event.issue.pull_request && contains(github.event.comment.body, 'please update snapshots')
-
-    steps:
-      - uses: jupyterlab/maintainer-tools/.github/actions/update-snapshots-checkout@main
-        with:
-          github_token: ${{ secrets.GITHUB_TOKEN }}
-
-      - name: Base Setup
-        uses: jupyterlab/maintainer-tools/.github/actions/base-setup@v1
-
-      - name: Install dependencies
-        run: python -m pip install -U "jupyterlab>=4.0.0,<5"
-
-      - name: Install extension
-        run: |
-          set -eux
-          jlpm
-          python -m pip install .
-
-      - uses: jupyterlab/maintainer-tools/.github/actions/update-snapshots@v1
-        with:
-          github_token: ${{ secrets.GITHUB_TOKEN }}
-          # Playwright knows how to start JupyterLab server
-          start_server_script: 'null'
-          test_folder: ui-tests
-          npm_client: jlpm