Add jupyter-releaser (#354)

* Add releaser

* Add changelog file

* Remove old releaser workflow

Author: martinRenou

.github/workflows/prep-release.yml

@@ -0,0 +1,48 @@
+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

@@ -0,0 +1,58 @@
+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 }}