From 9e52fc8db71abf5c037bd06bce383a2dcea99de4 Mon Sep 17 00:00:00 2001
From: Huw Wilkins <huw.wilkins@canonical.com>
Date: Thu, 29 Aug 2024 11:02:15 +1000
Subject: [PATCH] ci: add release preview action

---
 .github/workflows/release-preview.yml | 33 +++++++++++++++++++++++++++
 1 file changed, 33 insertions(+)
 create mode 100644 .github/workflows/release-preview.yml

diff --git a/.github/workflows/release-preview.yml b/.github/workflows/release-preview.yml
new file mode 100644
index 00000000..501585ce
--- /dev/null
+++ b/.github/workflows/release-preview.yml
@@ -0,0 +1,33 @@
+name: Preview release
+on:
+  pull_request:
+    branches:
+      - main
+
+jobs:
+  release:
+    name: Preview release
+    runs-on: ubuntu-latest
+    outputs:
+      new-release-version: ${{ steps.dry-run.outputs.new-release-version }}
+    steps:
+      - name: Checkout
+        uses: actions/checkout@v4
+        with:
+          fetch-depth: 0
+      - name: Setup Node.js
+        uses: actions/setup-node@v4
+        with:
+          node-version: "lts/*"
+      - name: Install dependencies
+        run: yarn install
+      - name: Preview release
+        env:
+          GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
+        id: dry-run
+        run: |
+          OUTPUT=$(unset GITHUB_ACTIONS && npx semantic-release --dry-run --no-ci --branches "$GITHUB_HEAD_REF" --repository-url "$github.event.pull_request.head.repo.git_url")
+          VERSION=$(echo "$OUTPUT" | grep -o "The next release version is [0-9]*\.[0-9]*\.[0-9]*" | awk '{print $6}')
+          echo "VERSION=$VERSION" >> "$GITHUB_OUTPUT"
+      - name: Next version
+        run: echo "The next version will be ${{ steps.dry-ryb.outputs.new-release-version }}"