ci: add pycafe playground link

Author: maartenbreddels

.bumpversion.cfg

@@ -22,3 +22,5 @@ values =
 [bumpversion:file:ipyreact/_frontend.py]
 
 [bumpversion:file:package.json]
+
+[bumpversion:file:.github/pycafe-create-status.py]

.github/pycafe-create-status.py

@@ -0,0 +1,55 @@
+import os
+import sys
+from urllib.parse import quote
+
+from github import Github
+
+# Authenticate with GitHub
+access_token = os.getenv("GITHUB_TOKEN")
+g = Github(access_token)
+
+
+repo_name = "widgetti/ipyreact"
+commit_sha = sys.argv[1]  # e.g d39677a321bca34df41ecc87ff7e539b450207f2
+run_id = sys.argv[2]  # e.g 1324, usually obtained via ${{ github.run_id }} or ${{ github.event.workflow_run.id }} in GitHub Actions workflow files
+type = "solara"  # streamlit/dash/vizro/solara/panel
+
+# your default code
+code = """import ipyreact
+
+
+class ConfettiWidget(ipyreact.ValueWidget):
+    _esm = \"""
+    import confetti from "canvas-confetti";
+    import * as React from "react";
+
+    export default function({value, setValue}) {
+        return <button onClick={() => confetti() && setValue(value + 1)}>
+            {value || 0} times confetti
+        </button>
+    };\"""
+page = ConfettiWidget()
+"""
+
+artifact_name = "ipyreact-dist"  # name given in the GitHub Actions workflow file for the artifact
+
+# your default requirements, the wheel version number (0.4.2) is bumped up for each new release using bump2version
+requirements = f"""solara
+https://py.cafe/gh/artifact/{repo_name}/actions/runs/{run_id}/{artifact_name}/ipyreact-0.4.2-py3-none-any.whl
+"""
+
+# GitHub Python API
+repo = g.get_repo(repo_name)
+
+base_url = f"https://py.cafe/snippet/{type}/v1"
+url = f"{base_url}#code={quote(code)}&requirements={quote(requirements)}"
+
+# Define the deployment status
+state = "success"  # Options: 'error', 'failure', 'pending', 'success'
+description = "Test out this PR on a PyCafe playground environment"
+context = "PyCafe"
+
+# Create the status on the commit
+commit = repo.get_commit(commit_sha)
+commit.create_status(state="success", target_url=url, description=description, context="PyCafe")
+print(f"Deployment status added to commit {commit_sha}")

.github/workflows/pycafe.yml

@@ -0,0 +1,20 @@
+---
+name: PyCafe Playground Link
+on:
+  workflow_run:
+    workflows: [Build]
+    types:
+      - completed
+
+jobs:
+  create-status:
+    runs-on: ubuntu-latest
+    steps:
+      - name: Checkout code
+        uses: actions/checkout@v2
+      - name: Create PyCafe status link
+        run: |
+          pip install PyGithub
+          python .github/pycafe-create-status.py ${{ github.event.workflow_run.head_sha }} ${{ github.event.workflow_run.id }}
+        env:
+          GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}