Find matching added string in GitHub Pull Request

load_pull_request_diff.js

const fs = require('fs');
const parse = require('parse-diff');
const axios = require('axios');

// Load pull request diff from GitHub REST API
const requestConfig = {
  headers: {
    'Accept': 'application/vnd.github.diff'
  }
};
const pullId = 14956; // NOTE: 73 files changed!
const repoFullname = 'eslint/eslint';
const url = `https://api.github.com/repos/${repoFullname}/pulls/${pullId}.diff`;
const diffStr = (await axios.get(url,requestConfig)).data;

// Search for this word
const KEYWORD = 'Requirements';

// Analyze all files
const files = parse(diffStr);
const filesWithMatchingAdds = files.map(
    file => ({
        file: file.to, 
        adds: file.chunks.map(
            chunk => chunk.changes
                // Only look for added lines
                .filter(chunk => chunk.type === 'add')
                // That match our keyword
                .filter(chunk => chunk.content.includes(KEYWORD))
        ).flat()}) // collapse into one array
// Only files with at least one match
).filter(file => file.adds.length); 

console.log('%j', filesWithMatchingAdds);