changelog.config.js

const fs = require('fs');

const customTransform = (commit, context) => {
  const transformedCommit = { ...commit };

  switch (transformedCommit.type) {
    case 'feat':
      transformedCommit.customGroup = 'Features';
      break;
    case 'feature':
      transformedCommit.customGroup = 'Features';
      break;
    case 'fix':
      transformedCommit.customGroup = 'Bug Fixes';
      break;
    case 'docs':
      transformedCommit.customGroup = 'Documentation';
      break;
    default:
      transformedCommit.customGroup = null;
  }

  return transformedCommit;
};

module.exports = {
  writerOpts: {
    transform: customTransform,
    groupBy: 'customGroup',
    commitGroupsSort: 'title',
    commitsSort: ['scope', 'subject'],
    mainTemplate: `{{> header}}
{{#each commitGroups}}
{{#if title}}
### {{title}}

{{#each commits}}
{{> commit root=@root}}
{{/each}}
{{/if}}

{{/each}}
{{> footer}}
`,
    headerPartial: `{{#if isPatch~}}
  ##
{{~else~}}
  #
{{~/if}} {{#if @root.linkCompare~}}
  [{{version}}](
  {{~#if @root.repository~}}
    {{~#if @root.host}}
      {{~@root.host}}/
    {{~/if}}
    {{~#if @root.owner}}
      {{~@root.owner}}/
    {{~/if}}
    {{~@root.repository}}
  {{~else}}
    {{~@root.repoUrl}}
  {{~/if~}}
  /compare/{{previousTag}}...{{currentTag}})
{{~else}}
  {{~version}}
{{~/if}}
{{~#if title}} "{{title}}"
{{~/if}}
{{~#if date}} ({{date}})
{{/if}}
`,
  },
  hooks: {
    postbump: () => {
      const path = 'CHANGELOG.md';
      if (!fs.existsSync(path)) {
        fs.writeFileSync(path, '', 'utf8');
      }
    },
  },
};