Generate Helm Diffs for PR #21
Workflow file for this run
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| name: Generate Helm Diffs for PR | |
| on: | |
| workflow_dispatch: | |
| inputs: | |
| pr_number: | |
| description: 'PR number to generate diff for' | |
| required: true | |
| type: string | |
| issue_comment: | |
| types: [created] | |
| jobs: | |
| helm-diff: | |
| if: | | |
| github.event_name == 'workflow_dispatch' || | |
| (github.event.issue.pull_request && contains(github.event.comment.body, '/helm-diff')) | |
| runs-on: ubuntu-latest | |
| steps: | |
| - name: Checkout PR Code | |
| uses: actions/checkout@v4 | |
| with: | |
| ref: refs/pull/${{ inputs.pr_number }}/head | |
| - name: Set up Helm | |
| uses: azure/setup-helm@v1 | |
| with: | |
| version: '3.10.2' | |
| - name: Install Helm Diff Plugin | |
| run: helm plugin install https://github.com/databus23/helm-diff | |
| - name: Add Helm Repositories | |
| run: | | |
| helm repo add bitnami https://charts.bitnami.com/bitnami | |
| helm repo add bitnami-labs https://bitnami-labs.github.io/sealed-secrets/ | |
| helm repo add cert-manager https://charts.jetstack.io | |
| helm repo add ingress-nginx https://kubernetes.github.io/ingress-nginx | |
| helm repo add metallb https://metallb.github.io/metallb | |
| helm repo add oauth2-proxy https://oauth2-proxy.github.io/manifests | |
| helm repo update | |
| - name: Set up kubeconfig | |
| run: | | |
| mkdir -p ~/.kube | |
| echo "${{ secrets.HELM_DIFF_KUBECONFIG }}" > ~/.kube/config | |
| chmod 600 ~/.kube/config | |
| - name: Generate and Format Diffs | |
| id: generate-diff | |
| run: | | |
| # Create header for the diff output file | |
| echo "### Helm Diff Results" > diff_output.md | |
| echo "" >> diff_output.md | |
| # Function to process diff output and wrap each resource in a dropdown | |
| process_diff() { | |
| local resource="" | |
| local diff_content="" | |
| local in_diff=false | |
| while IFS= read -r line; do | |
| if [[ $line =~ ^"bt, "* ]]; then | |
| # If a new resource is found, output the previous one (if exists) | |
| if [ -n "$resource" ]; then | |
| { | |
| echo "<details>" | |
| echo "<summary>$resource</summary>" | |
| echo "" | |
| echo "\`\`\`diff" | |
| echo "$diff_content" | |
| echo "\`\`\`" | |
| echo "</details>" | |
| echo "" | |
| } >> diff_output.md | |
| fi | |
| # Start a new resource block | |
| resource="${line#bt, }" | |
| diff_content="" | |
| in_diff=true | |
| elif [ "$in_diff" = true ]; then | |
| diff_content+="$line"$'\n' | |
| fi | |
| done | |
| # Output the last resource block if exists | |
| if [ -n "$resource" ]; then | |
| { | |
| echo "<details>" | |
| echo "<summary>$resource</summary>" | |
| echo "" | |
| echo "\`\`\`diff" | |
| echo "$diff_content" | |
| echo "\`\`\`" | |
| echo "</details>" | |
| echo "" | |
| } >> diff_output.md | |
| fi | |
| } | |
| # First update dependencies if needed | |
| helm dependency update ./infra/app | |
| helm dependency update ./infra/base | |
| # Process app chart diff output and log raw diff | |
| echo "#### App Chart Changes" >> diff_output.md | |
| echo "" >> diff_output.md | |
| echo "Raw App Chart Diff:" >> /tmp/raw_diffs.log | |
| helm diff upgrade bt-prod-app ./infra/app \ | |
| --install \ | |
| --namespace=bt \ | |
| --set host=stanfurdtime.com \ | |
| --version 1.0.0 2>&1 | tee -a /tmp/raw_diffs.log | process_diff | |
| # Process base chart diff output and log raw diff | |
| echo "" >> diff_output.md | |
| echo "#### Base Chart Changes" >> diff_output.md | |
| echo "" >> diff_output.md | |
| echo "Raw Base Chart Diff:" >> /tmp/raw_diffs.log | |
| helm diff upgrade bt-base ./infra/base \ | |
| --install \ | |
| --namespace=bt \ | |
| --version 1.0.0 2>&1 | tee -a /tmp/raw_diffs.log | process_diff | |
| # Log the raw diffs to GitHub Actions output | |
| echo "raw_diffs<<EOF" >> $GITHUB_OUTPUT | |
| cat /tmp/raw_diffs.log >> $GITHUB_OUTPUT | |
| echo "EOF" >> $GITHUB_OUTPUT | |
| # Save the formatted diff output as a step output using a unique delimiter | |
| delim=$(dd if=/dev/urandom bs=15 count=1 status=none | base64) | |
| echo "diff<<$delim" >> $GITHUB_OUTPUT | |
| cat diff_output.md >> $GITHUB_OUTPUT | |
| echo "$delim" >> $GITHUB_OUTPUT | |
| - name: Log Raw Diffs | |
| run: | | |
| echo "Raw Helm Diffs:" | |
| echo "${{ steps.generate-diff.outputs.raw_diffs }}" | |
| - name: Comment PR with Diff Output | |
| uses: actions/github-script@v6 | |
| with: | |
| script: | | |
| await github.rest.issues.createComment({ | |
| owner: context.repo.owner, | |
| repo: context.repo.repo, | |
| issue_number: Number(process.env.PR_NUMBER), | |
| body: process.env.DIFF | |
| }); | |
| env: | |
| PR_NUMBER: ${{ inputs.pr_number }} | |
| DIFF: ${{ steps.generate-diff.outputs.diff }} | |