changelog.config.js

module.exports = {
  writerOpts: {
    transform: (commit, context) => {
      const issues = [];

      commit.notes.forEach((note) => {
        note.title = 'BREAKING CHANGES';
      });

      if (commit.type === 'feat') {
        commit.type = 'Features';
      } else if (commit.type === 'fix') {
        commit.type = 'Bug Fixes';
      } else if (commit.type === 'perf') {
        commit.type = 'Performance Improvements';
      } else if (commit.type === 'revert' || commit.revert) {
        commit.type = 'Reverts';
      } else if (commit.type === 'docs') {
        commit.type = 'Documentation';
      } else if (commit.type === 'style') {
        commit.type = 'Styles';
      } else if (commit.type === 'refactor') {
        commit.type = 'Code Refactoring';
      } else if (commit.type === 'test') {
        commit.type = 'Tests';
      } else if (commit.type === 'build') {
        commit.type = 'Build System';
      } else if (commit.type === 'ci') {
        commit.type = 'Continuous Integration';
      } else if (commit.type === 'chore') {
        commit.type = 'Maintenance';
      }

      if (commit.scope === '*') {
        commit.scope = '';
      }

      if (typeof commit.hash === 'string') {
        commit.shortHash = commit.hash.substring(0, 7);
      }

      if (typeof commit.subject === 'string') {
        let url = context.repository
          ? `${context.host}/${context.owner}/${context.repository}`
          : context.repoUrl;
        if (url) {
          url = `${url}/issues/`;
          // Issue URLs.
          commit.subject = commit.subject.replace(/#([0-9]+)/g, (_, issue) => {
            issues.push(issue);
            return `[#${issue}](${url}${issue})`;
          });
        }
        if (context.host) {
          // User URLs.
          commit.subject = commit.subject.replace(
            /\B@([a-z0-9](?:-?[a-z0-9/]){0,38})/g,
            (_, username) => {
              if (username.includes('/')) {
                return `@${username}`;
              }

              return `[@${username}](${context.host}/${username})`;
            }
          );
        }
      }

      // remove references that already appear in the subject
      commit.references = commit.references.filter((reference) => {
        if (issues.indexOf(reference.issue) === -1) {
          return true;
        }

        return false;
      });

      return commit;
    },
  },
};