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feat: add automated release on version bumps
When Renovate merges dependency updates with version bumps: **Flow:** 1. Renovate creates PR to development with version bump (0.1.0 → 0.1.1) 2. PR auto-merges (if patch update) 3. Auto-release workflow detects version change 4. Creates PR from development → main with changelog 5. When main PR merges, auto-release tags and triggers release workflow 6. Release workflow builds artifacts, creates GitHub Release, updates 'latest' tag **Result:** - Dependency updates automatically trigger 0.1.x patch releases - Security fixes get immediate releases - All releases include attestations, checksums, binaries No manual intervention needed for routine dependency updates!
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‎.github/workflows/auto-release.yml‎

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name: Auto Release on Version Bump
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# Automatically creates a release when Cargo.toml version changes
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# Triggered by Renovate PRs merging to development
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on:
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push:
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branches: [development, main]
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paths:
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- 'Cargo.toml'
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permissions:
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contents: write
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pull-requests: write
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jobs:
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check-version-change:
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name: Check Version Change
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runs-on: ubuntu-latest
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outputs:
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version_changed: ${{ steps.check.outputs.changed }}
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new_version: ${{ steps.check.outputs.version }}
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should_release: ${{ steps.check.outputs.should_release }}
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steps:
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- uses: actions/checkout@v4
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with:
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fetch-depth: 2
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- name: Check if version changed
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id: check
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run: |
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# Get current version
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NEW_VERSION=$(grep '^version = ' Cargo.toml | head -1 | sed 's/.*= "\(.*\)"/\1/')
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echo "version=$NEW_VERSION" >> $GITHUB_OUTPUT
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# Get previous version
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git checkout HEAD^
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OLD_VERSION=$(grep '^version = ' Cargo.toml | head -1 | sed 's/.*= "\(.*\)"/\1/')
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git checkout -
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echo "Current version: $NEW_VERSION"
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echo "Previous version: $OLD_VERSION"
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if [ "$NEW_VERSION" != "$OLD_VERSION" ]; then
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echo "changed=true" >> $GITHUB_OUTPUT
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echo "should_release=true" >> $GITHUB_OUTPUT
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echo "✅ Version changed from $OLD_VERSION to $NEW_VERSION"
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else
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echo "changed=false" >> $GITHUB_OUTPUT
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echo "should_release=false" >> $GITHUB_OUTPUT
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echo "ℹ️ Version unchanged"
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fi
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- name: Check if tag already exists
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if: steps.check.outputs.changed == 'true'
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run: |
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VERSION="${{ steps.check.outputs.version }}"
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if git rev-parse "v$VERSION" >/dev/null 2>&1; then
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echo "⚠️ Tag v$VERSION already exists, skipping release"
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echo "should_release=false" >> $GITHUB_OUTPUT
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fi
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create-pr-to-main:
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name: Create PR to Main
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needs: check-version-change
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if: needs.check-version-change.outputs.version_changed == 'true'
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runs-on: ubuntu-latest
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steps:
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- uses: actions/checkout@v4
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with:
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fetch-depth: 0
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- name: Create release branch
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run: |
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VERSION="${{ needs.check-version-change.outputs.new_version }}"
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git checkout -b "release/v$VERSION"
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git push -u origin "release/v$VERSION"
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- name: Create PR to main
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env:
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GH_TOKEN: ${{ github.token }}
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run: |
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VERSION="${{ needs.check-version-change.outputs.new_version }}"
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# Check if PR already exists
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EXISTING_PR=$(gh pr list --base main --head "release/v$VERSION" --json number --jq '.[0].number')
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if [ -n "$EXISTING_PR" ]; then
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echo "PR #$EXISTING_PR already exists"
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exit 0
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fi
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# Get commit messages since last release
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LAST_TAG=$(git describe --tags --abbrev=0 2>/dev/null || echo "")
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if [ -n "$LAST_TAG" ]; then
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CHANGES=$(git log --pretty=format:"- %s (%h)" "$LAST_TAG"..HEAD)
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else
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CHANGES=$(git log --pretty=format:"- %s (%h)" -10)
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fi
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gh pr create \
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--base main \
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--head "release/v$VERSION" \
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--title "Release v$VERSION" \
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--body "## Release v$VERSION
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Automated release created by version bump in Cargo.toml.
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### Changes
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$CHANGES
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### Checklist
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- [ ] All CI checks pass
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- [ ] Documentation is up to date
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- [ ] CHANGELOG.md updated (if needed)
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Once merged, the release workflow will automatically:
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- Create GitHub Release v$VERSION
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- Build and attach all artifacts
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- Update \`latest\` tag
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- Generate attestations and checksums
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---
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_🤖 Auto-generated by version bump workflow_"
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trigger-release:
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name: Create Release Tag
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needs: check-version-change
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if: needs.check-version-change.outputs.should_release == 'true' && github.ref == 'refs/heads/main'
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runs-on: ubuntu-latest
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steps:
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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: Create and push release tag
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run: |
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VERSION="${{ needs.check-version-change.outputs.new_version }}"
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git config user.name "github-actions[bot]"
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git config user.email "41898282+github-actions[bot]@users.noreply.github.com"
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# Create tag
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git tag -a "v$VERSION" -m "Release v$VERSION
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Automated release from version bump in Cargo.toml.
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Triggered by Renovate dependency updates."
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# Push tag (this will trigger the release workflow)
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git push origin "v$VERSION"
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echo "✅ Created and pushed tag v$VERSION"
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echo "🚀 Release workflow will now build and publish the release"

‎renovate.json5‎

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// Rust-specific configuration
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"rust": {
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"enabled": true,
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"bumpVersion": "patch" // Auto-bump version in Cargo.toml
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"bumpVersion": "patch" // Auto-bump version in Cargo.toml for patch updates
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},
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// Auto-release configuration
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// When version bumps merge to development, auto-release workflow creates release PR to main
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"prBodyNotes": [
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"---",
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"**🤖 Automated Release**: When this PR merges to `development`, the auto-release workflow will:",
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"- Detect the version bump in Cargo.toml",
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"- Create a PR from `development` → `main` with release notes",
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"- Once that PR merges, trigger the release workflow automatically",
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"- Publish v{{newVersion}} with all artifacts and attestations"
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],
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// Cargo configuration
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"cargo": {
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"enabled": true,

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