Get all semantic commits from a PR

changelog.js

const fs = require('fs');

const request = require('request-promise');


const query = `query {
  repository(name:"<project>", owner:"<owner>") {
    pullRequest(number: 993) {
      id
      commits(last:250) {
        edges {
          node {
            commit {
              message
            }
          }
        }
      }
    }
  }
}`;

function writeMarkdownFile(body) {
  let markdown = '';

  Object.keys(body).forEach((semanticType) => {
    if (!body[semanticType].length) return;
    markdown += `## ${semanticType} \n`;
    body[semanticType].forEach((change) => {
      markdown += `- ${change} \n`;
    });
  });

  fs.writeFile('./changelog.md', markdown, () => {
    console.log('done');
  });
}

function parseCommits(commits) {
  const regex = /(chore|docs|feat|fix|refactor|style|test):/gm;
  const semanticTypes = {
    chore: [],
    docs: [],
    feat: [],
    fix: [],
    refactor: [],
    style: [],
    test: [],
  };

  commits.edges.map((commit) => {
    const result = regex.exec(commit.node.commit.message);
    if (result) {
      semanticTypes[result[1]].push(result.input.replace(`${result[0]} `, ''));
    }
  });

  writeMarkdownFile(semanticTypes);
}

const options = {
  uri: 'https://api.github.com/graphql',
  method: 'POST',
  headers: {
    Authorization: 'bearer <token>',
    'User-Agent': 'foo',
  },
  body: JSON.stringify({ query }),
};

request(options)
  .then((response) => {
    parseCommits(JSON.parse(response).data.repository.pullRequest.commits);
  })
  .catch((error) => {
    console.error(error.message);
  });