# ─────────────────────────────────────────────────────────────────────────────

# .github/workflows/pr-code-graph.yml

# ─────────────────────────────────────────────────────────────────────────────

# Runs on every PR to produce a PR Reviewer graph JSON artifact.

# Uses CGC + FalkorDB Lite (Linux-native, zero-config embedded graph DB).

# ─────────────────────────────────────────────────────────────────────────────

name: "PR Code Graph Analysis"

on:

pull_request:

types: [opened, synchronize, reopened]

permissions:

contents: read

pull-requests: read

jobs:

analyze:

name: "🔍 Build PR Code Graph"

runs-on: ubuntu-latest

timeout-minutes: 15

steps:

# ── 1. Checkout the repository (with PR head) ────────────────────────

- name: Checkout PR head

uses: actions/checkout@v4

with:

ref: ${{ github.event.pull_request.head.sha }}

fetch-depth: 0 # full history for git-churn metrics

# ── 2. Set up Python ──────────────────────────────────────────────────

- name: Set up Python 3.12

uses: actions/setup-python@v5

with:

python-version: "3.12"

cache: "pip"

# ── 3. Install CGC + FalkorDB Lite ─────────────────────────────────

- name: Install CodeGraphContext

run: |

pip install --upgrade pip

pip install codegraphcontext falkordblite

# ── 4. Run the PR graph analysis script ────────────────────────────

- name: Analyze PR Code Graph

env:

GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}

run: |

# Extract owner/repo/pr from the event context

OWNER="${{ github.repository_owner }}"

REPO="${{ github.event.repository.name }}"

PR_NUMBER="${{ github.event.pull_request.number }}"

# Run the analysis script

bash scripts/pr-graph-analyze.sh \

"$OWNER" "$REPO" "$PR_NUMBER" \

"./pr-graph-output"

# ── 5. Upload the JSON as a build artifact ─────────────────────────

- name: Upload PR Graph JSON

uses: actions/upload-artifact@v4

with:

name: pr-code-graph-${{ github.event.pull_request.number }}

path: ./pr-graph-output/*.json

retention-days: 30

# ── 6. (Optional) Post a comment with the viewer link ──────────────

- name: Comment PR with viewer link

if: success()

uses: actions/github-script@v7

with:

github-token: ${{ secrets.GITHUB_TOKEN }}

script: |

const owner = context.repo.owner;

const repo = context.repo.repo;

const pr = context.payload.pull_request.number;

const body = [

'## 🔍 PR Code Graph Analysis',

'',

`**${context.payload.pull_request.title}** (#${pr})`,

'',

'### 📊 Interactive Visualization',

`View the blast radius graph: **[PR Reviewer Dashboard](https://codegraphcontext.dev/pr-reviewer/${owner}/${repo}/pull/${pr})**`,

'',

'### 📦 Artifacts',

`The graph JSON has been uploaded as a build artifact: \`pr-code-graph-${pr}\``,

'',

'---',

'*Generated by [CodeGraphContext](https://github.com/CodeGraphContext/CodeGraphContext) using FalkorDB Lite*',

].join('\n');

// Check for existing bot comment to update instead of spam

const { data: comments } = await github.rest.issues.listComments({

owner, repo, issue_number: pr,

});

const existing = comments.find(c =>

c.user.type === 'Bot' && c.body.includes('PR Code Graph Analysis')

);

if (existing) {

await github.rest.issues.updateComment({

owner, repo, comment_id: existing.id, body,

});

} else {

await github.rest.issues.createComment({

owner, repo, issue_number: pr, body,

});

}