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ci: add changeset bot for PR comments
- Add /changeset command to create changesets via PR comments - Update changeset-check to post helpful instructions - Supports: /changeset patch|minor|major [packages]
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‎.github/workflows/changeset-bot.yml‎

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name: Changeset Bot
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on:
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issue_comment:
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types: [created]
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jobs:
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changeset:
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name: Create Changeset
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if: |
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github.event.issue.pull_request &&
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startsWith(github.event.comment.body, '/changeset')
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runs-on: ubuntu-latest
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permissions:
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contents: write
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pull-requests: write
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steps:
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- name: Get PR branch
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id: pr
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uses: actions/github-script@v7
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with:
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script: |
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const pr = await github.rest.pulls.get({
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owner: context.repo.owner,
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repo: context.repo.repo,
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pull_number: context.issue.number
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});
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core.setOutput('branch', pr.data.head.ref);
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core.setOutput('title', pr.data.title);
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- name: Checkout PR branch
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uses: actions/checkout@v4
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with:
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ref: ${{ steps.pr.outputs.branch }}
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fetch-depth: 0
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- name: Install pnpm
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uses: pnpm/action-setup@v4
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- name: Setup Node.js
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uses: actions/setup-node@v4
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with:
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node-version: '20'
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cache: 'pnpm'
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- name: Install dependencies
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run: pnpm install --frozen-lockfile
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- name: Parse command
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id: parse
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uses: actions/github-script@v7
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with:
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script: |
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const comment = context.payload.comment.body.trim();
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const lines = comment.split('\n');
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const firstLine = lines[0].trim();
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// Parse: /changeset [patch|minor|major] [package1,package2]
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const match = firstLine.match(/^\/changeset\s+(patch|minor|major)(?:\s+(.+))?$/i);
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if (!match) {
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core.setFailed('Invalid format. Use: /changeset <patch|minor|major> [package1,package2]');
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return;
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}
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const bump = match[1].toLowerCase();
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const packagesArg = match[2];
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// Get summary from rest of comment or PR title
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let summary = lines.slice(1).join('\n').trim();
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if (!summary) {
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summary = '${{ steps.pr.outputs.title }}';
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}
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core.setOutput('bump', bump);
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core.setOutput('packages', packagesArg || '');
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core.setOutput('summary', summary);
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- name: Get changed packages
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id: packages
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run: |
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if [ -n "${{ steps.parse.outputs.packages }}" ]; then
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echo "packages=${{ steps.parse.outputs.packages }}" >> $GITHUB_OUTPUT
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else
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# Auto-detect from changed files
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CHANGED=$(git diff --name-only origin/main...HEAD | grep -E "^(ts-cache|storages)/" | cut -d'/' -f1-2 | sort -u | tr '\n' ',' | sed 's/,$//')
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if [ -z "$CHANGED" ]; then
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CHANGED="ts-cache"
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fi
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echo "packages=$CHANGED" >> $GITHUB_OUTPUT
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fi
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- name: Create changeset
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run: |
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BUMP="${{ steps.parse.outputs.bump }}"
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PACKAGES="${{ steps.packages.outputs.packages }}"
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SUMMARY="${{ steps.parse.outputs.summary }}"
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# Generate random filename
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FILENAME=".changeset/$(echo $RANDOM | md5sum | head -c 12).md"
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# Map folder names to package names
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get_package_name() {
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case "$1" in
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ts-cache) echo "@node-ts-cache/core" ;;
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storages/lru) echo "@node-ts-cache/lru-storage" ;;
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storages/redis) echo "@node-ts-cache/redis-storage" ;;
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storages/redisio) echo "@node-ts-cache/ioredis-storage" ;;
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storages/node-cache) echo "@node-ts-cache/node-cache-storage" ;;
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storages/lru-redis) echo "@node-ts-cache/lru-redis-storage" ;;
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*) echo "$1" ;;
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esac
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}
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# Create changeset content
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echo "---" > "$FILENAME"
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IFS=',' read -ra PKGS <<< "$PACKAGES"
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for pkg in "${PKGS[@]}"; do
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pkg=$(echo "$pkg" | xargs) # trim whitespace
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pkg_name=$(get_package_name "$pkg")
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echo "\"$pkg_name\": $BUMP" >> "$FILENAME"
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done
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echo "---" >> "$FILENAME"
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echo "" >> "$FILENAME"
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echo "$SUMMARY" >> "$FILENAME"
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echo "Created changeset:"
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cat "$FILENAME"
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- name: Commit and push
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run: |
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git config --global user.name "github-actions[bot]"
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git config --global user.email "github-actions[bot]@users.noreply.github.com"
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git add .changeset/
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git commit -m "chore: add changeset"
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git push
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- name: Comment success
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uses: actions/github-script@v7
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with:
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script: |
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await github.rest.issues.createComment({
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owner: context.repo.owner,
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repo: context.repo.repo,
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issue_number: context.issue.number,
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body: `✅ Changeset created!\n\n**Type:** ${{ steps.parse.outputs.bump }}\n**Packages:** ${{ steps.packages.outputs.packages }}\n**Summary:** ${{ steps.parse.outputs.summary }}`
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});
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- name: Comment failure
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if: failure()
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uses: actions/github-script@v7
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with:
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script: |
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await github.rest.issues.createComment({
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owner: context.repo.owner,
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repo: context.repo.repo,
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issue_number: context.issue.number,
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body: `❌ Failed to create changeset. Please check the [workflow run](https://github.com/${{ github.repository }}/actions/runs/${{ github.run_id }}) for details.\n\n**Usage:**\n\`\`\`\n/changeset patch\n/changeset minor\n/changeset major @node-ts-cache/core,@node-ts-cache/lru-storage\n\`\`\`\n\nAdd a summary on the next line:\n\`\`\`\n/changeset patch\nFixed a bug in cache expiration\n\`\`\``
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});

‎.github/workflows/changeset-check.yml‎

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check:
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name: Check for changeset
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runs-on: ubuntu-latest
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permissions:
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pull-requests: write
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steps:
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- name: Checkout repository
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uses: actions/checkout@v4
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with:
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fetch-depth: 0
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- name: Install pnpm
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uses: pnpm/action-setup@v4
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- name: Setup Node.js
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uses: actions/setup-node@v4
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with:
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node-version: '20'
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cache: 'pnpm'
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- name: Install dependencies
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run: pnpm install --frozen-lockfile
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- name: Check for changeset
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id: check
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run: |
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# Skip check for release PRs and bot PRs
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# Skip check for release PRs
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if [[ "${{ github.head_ref }}" == "changeset-release/"* ]]; then
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echo "Skipping changeset check for release PR"
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echo "skip=true" >> $GITHUB_OUTPUT
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exit 0
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fi
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# Check if any changeset files exist (excluding config.json)
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CHANGESETS=$(find .changeset -name "*.md" -type f 2>/dev/null | wc -l)
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# Check if any changeset files exist (excluding config.json and README)
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CHANGESETS=$(find .changeset -name "*.md" -type f ! -name "README.md" 2>/dev/null | wc -l)
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if [ "$CHANGESETS" -eq 0 ]; then
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echo "::error::No changeset found! Please run 'pnpm changeset' to create one."
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echo ""
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echo "A changeset describes what changes you made and how they affect the packages."
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echo ""
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echo "Run: pnpm changeset"
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echo "Then select the packages you changed and the type of change (patch/minor/major)."
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exit 1
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echo "found=false" >> $GITHUB_OUTPUT
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exit 0
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fi
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echo "Found $CHANGESETS changeset(s)"
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echo "found=true" >> $GITHUB_OUTPUT
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echo "count=$CHANGESETS" >> $GITHUB_OUTPUT
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- name: Post or update comment
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if: steps.check.outputs.skip != 'true'
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uses: actions/github-script@v7
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with:
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script: |
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const found = '${{ steps.check.outputs.found }}' === 'true';
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const count = '${{ steps.check.outputs.count }}';
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const marker = '<!-- changeset-check-comment -->';
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let body;
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if (found) {
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body = `${marker}\n✅ **Changeset found** (${count} changeset file(s))\n\nThis PR will be included in the next release.`;
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} else {
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body = `${marker}\n⚠️ **No changeset found**\n\nThis PR doesn't have a changeset. If this PR should trigger a release, please add one:\n\n### Option 1: Comment command\nComment on this PR:\n\`\`\`\n/changeset patch\nYour change description here\n\`\`\`\n\nOr specify packages:\n\`\`\`\n/changeset minor @node-ts-cache/core\nAdded new caching feature\n\`\`\`\n\n### Option 2: Manual\n\`\`\`bash\npnpm changeset\ngit add .changeset && git commit -m "chore: add changeset" && git push\n\`\`\`\n\n---\n*If this PR doesn't need a release (e.g., docs, CI changes), you can ignore this message.*`;
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}
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// Find existing comment
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const comments = await github.rest.issues.listComments({
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owner: context.repo.owner,
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repo: context.repo.repo,
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issue_number: context.issue.number
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});
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const existing = comments.data.find(c => c.body.includes(marker));
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if (existing) {
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await github.rest.issues.updateComment({
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owner: context.repo.owner,
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repo: context.repo.repo,
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comment_id: existing.id,
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body
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});
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} else {
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await github.rest.issues.createComment({
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owner: context.repo.owner,
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repo: context.repo.repo,
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issue_number: context.issue.number,
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body
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});
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}
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// Fail the check if no changeset found
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if (!found) {
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core.setFailed('No changeset found. See comment for instructions.');
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}

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