LLVM Trunk Failure Analyzer #47

Workflow file for this run

.github/workflows/llvm-trunk-failure-analyzer.yml at c2d8866

	# Copyright 2024-2026, Intel Corporation
	# SPDX-License-Identifier: BSD-3-Clause

	# Analyzes failures in the LLVM trunk nightly workflow using Claude Code.

	name: LLVM Trunk Failure Analyzer

	on:
	# zizmor: ignore[dangerous-triggers] - workflow_run is intentionally used to analyze nightly failures
	workflow_run:
	workflows: ["Nightly Linux tests / LLVM trunk"]
	types:
	- completed
	workflow_dispatch:
	inputs:
	run_id:
	description: 'Workflow run ID to analyze (leave empty for latest failed run)'
	required: false
	type: string

	permissions: {}

	jobs:
	analyze-failure:
	# Disabling this workflow for non ispc/ispc repo, since number of build submissions is limited.
	# Only run if the nightly workflow failed, or if manually triggered
	if: github.repository == 'ispc/ispc' && (github.event.workflow_run.conclusion == 'failure' \|\| github.event_name == 'workflow_dispatch')
	runs-on: ubuntu-latest
	permissions:
	contents: read
	actions: read
	issues: write

	outputs:
	issue_number: ${{ steps.create-issue.outputs.issue_number }}

	steps:
	- uses: actions/checkout@1af3b93b6815bc44a9784bd300feb67ff0d1eeb3 # v6.0.0

	- name: Setup Node.js
	uses: actions/setup-node@6044e13b5dc448c55e2357c09f80417699197238 # v6.2.0
	with:
	node-version: '20'

	- name: Determine run ID to analyze
	id: get-run-id
	env:
	GH_TOKEN: ${{ github.token }}
	INPUT_RUN_ID: ${{ inputs.run_id }}
	WORKFLOW_RUN_ID: ${{ github.event.workflow_run.id }}
	run: \|
	if [ -n "$INPUT_RUN_ID" ]; then
	RUN_ID="$INPUT_RUN_ID"
	elif [ -n "$WORKFLOW_RUN_ID" ]; then
	RUN_ID="$WORKFLOW_RUN_ID"
	else
	# Find the latest failed run of the nightly workflow
	RUN_ID=$(gh run list --workflow="linux-nightly-trunk.yml" --status=failure --limit=1 --json databaseId --jq '.[0].databaseId')
	fi
	echo "run_id=$RUN_ID" >> "$GITHUB_OUTPUT"
	echo "Analyzing run ID: $RUN_ID"

	- name: Download LLVM SHA artifact from failed run
	id: download-sha
	env:
	GH_TOKEN: ${{ github.token }}
	run: \|
	RUN_ID="${{ steps.get-run-id.outputs.run_id }}"
	echo "Downloading LLVM SHA artifact from run $RUN_ID"

	# Download the artifact
	gh run download "$RUN_ID" --name llvm_commit_sha --dir ./artifacts \|\| {
	echo "Failed to download LLVM SHA artifact"
	echo "current_sha=unknown" >> "$GITHUB_OUTPUT"
	exit 0
	}

	if [ -f "./artifacts/llvm-commit-sha.txt" ]; then
	CURRENT_SHA=$(cat ./artifacts/llvm-commit-sha.txt)
	echo "Current LLVM SHA: $CURRENT_SHA"
	echo "current_sha=$CURRENT_SHA" >> "$GITHUB_OUTPUT"
	else
	echo "LLVM SHA file not found"
	echo "current_sha=unknown" >> "$GITHUB_OUTPUT"
	fi

	- name: Get previous successful run's LLVM SHA
	id: get-previous-sha
	env:
	GH_TOKEN: ${{ github.token }}
	run: \|
	# Find the latest successful run before the failed one
	FAILED_RUN_ID="${{ steps.get-run-id.outputs.run_id }}"
	FAILED_RUN_DATE=$(gh run view "$FAILED_RUN_ID" --json createdAt --jq '.createdAt')

	echo "Looking for successful runs before $FAILED_RUN_DATE"

	# Get successful runs and find one before the failed run
	PREV_RUN_ID=$(gh run list --workflow="linux-nightly-trunk.yml" --status=success --limit=5 --json databaseId,createdAt \
	--jq ".[] \| select(.createdAt < \"$FAILED_RUN_DATE\") \| .databaseId" \| head -1)

	if [ -z "$PREV_RUN_ID" ]; then
	echo "No previous successful run found"
	echo "previous_sha=unknown" >> "$GITHUB_OUTPUT"
	exit 0
	fi

	echo "Previous successful run ID: $PREV_RUN_ID"

	# Download artifact from previous run
	gh run download "$PREV_RUN_ID" --name llvm_commit_sha --dir ./prev_artifacts \|\| {
	echo "Failed to download previous LLVM SHA artifact"
	echo "previous_sha=unknown" >> "$GITHUB_OUTPUT"
	exit 0
	}

	if [ -f "./prev_artifacts/llvm-commit-sha.txt" ]; then
	PREV_SHA=$(cat ./prev_artifacts/llvm-commit-sha.txt)
	echo "Previous LLVM SHA: $PREV_SHA"
	echo "previous_sha=$PREV_SHA" >> "$GITHUB_OUTPUT"
	else
	echo "Previous LLVM SHA file not found"
	echo "previous_sha=unknown" >> "$GITHUB_OUTPUT"
	fi

	- name: Get recent ISPC commits
	id: get-ispc-commits
	env:
	GH_TOKEN: ${{ github.token }}
	run: \|
	# Get ISPC commits from last 24 hours
	SINCE=$(date -u -d '24 hours ago' '+%Y-%m-%dT%H:%M:%SZ')
	echo "Getting ISPC commits since $SINCE"

	COMMITS=$(git log --since="$SINCE" --oneline HEAD 2>/dev/null \|\| echo "")
	if [ -z "$COMMITS" ]; then
	# Fallback: get last 5 commits
	COMMITS=$(git log --oneline -5 HEAD)
	fi

	echo "Recent ISPC commits:"
	echo "$COMMITS"

	# Save to file for the agent
	echo "$COMMITS" > ispc-recent-commits.txt

	- name: Run Claude Code analyzer
	env:
	ANTHROPIC_API_KEY: ${{ secrets.ANTHROPIC_API_KEY }}
	GH_TOKEN: ${{ github.token }}
	run: \|
	RUN_ID="${{ steps.get-run-id.outputs.run_id }}"
	CURRENT_SHA="${{ steps.download-sha.outputs.current_sha }}"
	PREVIOUS_SHA="${{ steps.get-previous-sha.outputs.previous_sha }}"

	echo "=== LLVM Trunk Failure Analysis ==="
	echo "Failed run ID: $RUN_ID"
	echo "Current LLVM SHA: $CURRENT_SHA"
	echo "Previous LLVM SHA: $PREVIOUS_SHA"
	echo "=================================="

	# Run Claude Code with the analyzer skill and capture output
	if ! npx @anthropic-ai/claude-code --print \
	"/analyze-llvm-trunk --run-id $RUN_ID --current-sha $CURRENT_SHA --previous-sha $PREVIOUS_SHA" \
	> analysis_output.txt 2>&1; then
	echo "::error::Claude Code analysis failed"
	echo "=== Analysis Output ==="
	cat analysis_output.txt
	exit 1
	fi
	cat analysis_output.txt

	- name: Create GitHub issue with analysis
	id: create-issue
	env:
	GH_TOKEN: ${{ github.token }}
	run: \|
	RUN_ID="${{ steps.get-run-id.outputs.run_id }}"
	CURRENT_SHA="${{ steps.download-sha.outputs.current_sha }}"
	RUN_URL="https://github.com/${{ github.repository }}/actions/runs/$RUN_ID"

	# Check if an open issue already exists for LLVM trunk failure
	EXISTING_ISSUE=$(gh issue list --label "llvm-trunk" --state open --limit 1 --json number --jq '.[0].number')

	if [ -n "$EXISTING_ISSUE" ]; then
	echo "Updating existing issue #$EXISTING_ISSUE"
	{
	echo "## New Failure Analysis ($(date -u '+%Y-%m-%d %H:%M UTC'))"
	echo ""
	echo "Failed run: $RUN_URL"
	echo "LLVM SHA: \`$CURRENT_SHA\`"
	echo ""
	echo "<details>"
	echo "<summary>Analysis Output</summary>"
	echo ""
	cat analysis_output.txt
	echo ""
	echo "</details>"
	echo ""
	echo "---"
	echo "Generated with [Claude Code](https://claude.com/claude-code)"
	} > issue_body.md
	gh issue comment "$EXISTING_ISSUE" --body-file issue_body.md
	echo "issue_number=$EXISTING_ISSUE" >> "$GITHUB_OUTPUT"
	else
	echo "Creating new issue"
	{
	echo "## LLVM Trunk Build Failure"
	echo ""
	echo "Failed run: $RUN_URL"
	echo "LLVM SHA: \`$CURRENT_SHA\`"
	echo ""
	echo "## Analysis"
	echo ""
	cat analysis_output.txt
	echo ""
	echo "---"
	echo "Generated with [Claude Code](https://claude.com/claude-code)"
	} > issue_body.md
	ISSUE_NUMBER=$(gh issue create \
	--title "LLVM trunk nightly build failure" \
	--label "llvm-trunk" \
	--body-file issue_body.md \| grep -oE '[0-9]+$')
	echo "Created issue #$ISSUE_NUMBER"
	echo "issue_number=$ISSUE_NUMBER" >> "$GITHUB_OUTPUT"
	fi

	request-fix:
	# Request Claude to fix LLVM trunk failures via reusable workflow
	needs: analyze-failure
	if: success() && needs.analyze-failure.outputs.issue_number != ''
	permissions:
	contents: write
	pull-requests: write
	issues: write
	actions: read
	uses: ./.github/workflows/claude.yml
	with:
	prompt: "Fix issue #${{ needs.analyze-failure.outputs.issue_number }} and create a PR"
	secrets: inherit

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LLVM Trunk Failure Analyzer #47

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