Add workflow to weekly create a new release

.github/workflows/release.yml

@@ -0,0 +1,35 @@
+name: Release PR
+
+on:
+  workflow_dispatch:
+  schedule:
+    # TODO: Friday release instead? :o
+    - cron: "0 9 * * 1" # Create releases 9AM on a monday
+
+jobs:
+  release-pr:
+    runs-on: ubuntu-latest
+
+    steps:
+      - name: Checkout
+        uses: actions/checkout@v5
+        with:
+          fetch-depth: 0      # fetch all commits
+          tags: true          # fetch all tags
+
+      - name: Set up Git
+        run: |
+          git config --global user.name "github-actions[bot]"
+          git config --global user.email "github-actions[bot]@users.noreply.github.com"
+
+      - name: Install dependencies
+        run: |
+          sudo apt update
+          sudo apt install gh -y
+          cargo install git-cliff --locked
+
+      - name: Authenticate GitHub CLI
+        run: gh auth login --with-token <<< "${{ secrets.GITHUB_TOKEN }}"
+
+      - name: Run release PR script
+        run: ./scripts/create-release.sh

scripts/create-release.sh

@@ -1,20 +1,32 @@
 #!/usr/bin/env bash
 set -euo pipefail
 
-TAG="$1"
-BRANCH="release/v$TAG"
-
 if ! command -v git-cliff >/dev/null; then
   echo "git-cliff is not installed. Run: cargo install git-cliff"
   exit 1
 fi
 
 # Fail fast if opam-publish isn't installed
 if ! command -v gh >/dev/null; then
-  echo "github-clie is not installed."
+  echo "github-cli is not installed."
   exit 1
 fi
 
+if [ $# -ge 1 ] && [ -n "$1" ]; then
+  TAG="$1"
+else
+  git fetch --tags
+
+  LAST_TAG=$(git describe --tags --abbrev=0 || echo "v0.0.0")
+
+  IFS='.' read -r MAJOR MINOR PATCH <<< "${LAST_TAG#v}"
+
+  MINOR=$((MINOR + 1))
+
+  TAG="$MAJOR.$MINOR.$PATCH"
+fi
+
+BRANCH="release/v$TAG"
 git switch -c $BRANCH
 git-cliff -c cliff.toml -t $TAG -o CHANGES.md
 git add CHANGES.md