Files
claude-code-action/examples/test-failure-analysis.yml
Claude ae2fd1754a fix: prevent command injection in test-failure-analysis example
Fix command injection vulnerability where github.event.workflow_run.head_branch
was directly interpolated into shell commands. Branch names containing shell
metacharacters could execute arbitrary commands.

Changes:
- Pass head_branch through environment variables instead of direct interpolation
- Affects gh pr list --head and gh workflow run --ref commands
- Prevents execution of malicious code in branch names

Severity: HIGH
Category: command_injection
2025-12-13 20:47:58 +00:00

117 lines
4.4 KiB
YAML

name: Auto-Retry Flaky Tests
# This example demonstrates using structured outputs to detect flaky test failures
# and automatically retry them, reducing noise from intermittent failures.
#
# Use case: When CI fails, automatically determine if it's likely flaky and retry if so.
on:
workflow_run:
workflows: ["CI"]
types: [completed]
permissions:
contents: read
actions: write
jobs:
detect-flaky:
runs-on: ubuntu-latest
if: ${{ github.event.workflow_run.conclusion == 'failure' }}
steps:
- name: Checkout repository
uses: actions/checkout@v4
- name: Detect flaky test failures
id: detect
uses: anthropics/claude-code-action@main
with:
anthropic_api_key: ${{ secrets.ANTHROPIC_API_KEY }}
prompt: |
The CI workflow failed: ${{ github.event.workflow_run.html_url }}
Check the logs: gh run view ${{ github.event.workflow_run.id }} --log-failed
Determine if this looks like a flaky test failure by checking for:
- Timeout errors
- Race conditions
- Network errors
- "Expected X but got Y" intermittent failures
- Tests that passed in previous commits
Return:
- is_flaky: true if likely flaky, false if real bug
- confidence: number 0-1 indicating confidence level
- summary: brief one-sentence explanation
claude_args: |
--json-schema '{"type":"object","properties":{"is_flaky":{"type":"boolean","description":"Whether this appears to be a flaky test failure"},"confidence":{"type":"number","minimum":0,"maximum":1,"description":"Confidence level in the determination"},"summary":{"type":"string","description":"One-sentence explanation of the failure"}},"required":["is_flaky","confidence","summary"]}'
# Auto-retry only if flaky AND high confidence (>= 0.7)
- name: Retry flaky tests
if: |
fromJSON(steps.detect.outputs.structured_output).is_flaky == true &&
fromJSON(steps.detect.outputs.structured_output).confidence >= 0.7
env:
GH_TOKEN: ${{ github.token }}
HEAD_BRANCH: ${{ github.event.workflow_run.head_branch }}
run: |
OUTPUT='${{ steps.detect.outputs.structured_output }}'
CONFIDENCE=$(echo "$OUTPUT" | jq -r '.confidence')
SUMMARY=$(echo "$OUTPUT" | jq -r '.summary')
echo "🔄 Flaky test detected (confidence: $CONFIDENCE)"
echo "Summary: $SUMMARY"
echo ""
echo "Triggering automatic retry..."
gh workflow run "${{ github.event.workflow_run.name }}" \
--ref "$HEAD_BRANCH"
# Low confidence flaky detection - skip retry
- name: Low confidence detection
if: |
fromJSON(steps.detect.outputs.structured_output).is_flaky == true &&
fromJSON(steps.detect.outputs.structured_output).confidence < 0.7
run: |
OUTPUT='${{ steps.detect.outputs.structured_output }}'
CONFIDENCE=$(echo "$OUTPUT" | jq -r '.confidence')
echo "⚠️ Possible flaky test but confidence too low ($CONFIDENCE)"
echo "Not retrying automatically - manual review recommended"
# Comment on PR if this was a PR build
- name: Comment on PR
if: github.event.workflow_run.event == 'pull_request'
env:
GH_TOKEN: ${{ github.token }}
HEAD_BRANCH: ${{ github.event.workflow_run.head_branch }}
run: |
OUTPUT='${{ steps.detect.outputs.structured_output }}'
IS_FLAKY=$(echo "$OUTPUT" | jq -r '.is_flaky')
CONFIDENCE=$(echo "$OUTPUT" | jq -r '.confidence')
SUMMARY=$(echo "$OUTPUT" | jq -r '.summary')
pr_number=$(gh pr list --head "$HEAD_BRANCH" --json number --jq '.[0].number')
if [ -n "$pr_number" ]; then
if [ "$IS_FLAKY" = "true" ]; then
TITLE="🔄 Flaky Test Detected"
ACTION="✅ Automatically retrying the workflow"
else
TITLE="❌ Test Failure"
ACTION="⚠️ This appears to be a real bug - manual intervention needed"
fi
gh pr comment "$pr_number" --body "$(cat <<EOF
## $TITLE
**Analysis**: $SUMMARY
**Confidence**: $CONFIDENCE
$ACTION
[View workflow run](${{ github.event.workflow_run.html_url }})
EOF
)"
fi