conventional-changelog-preset-loader - npm Package Compare versions

Comparing version 3.0.0 to 4.0.0

index.js

 'use strict'
 
-const nodePath = require('path')
+const path = require('path')
 
-module.exports = presetLoader(require)
-module.exports.presetLoader = presetLoader
+module.exports.loadPreset = createPresetLoader((preset) => import(preset))
+module.exports.createPresetLoader = createPresetLoader
 
-function presetLoader (requireMethod) {
-  return path => {
-    let name = ''
-    let scope = ''
-    let absolutePath = ''
+/**
+ * @typedef {((moduleName: string) => any) | ((moduleName: string) => Promise<any>)} ModuleLoader
+ */
 
-    if (typeof path === 'string') {
-      name = path.toLowerCase()
-      if (nodePath.isAbsolute(path)) {
-        absolutePath = path
-      }
-    } else if (typeof path === 'object' && path.name) {
-      // Rather than a string preset name, options.preset can be an object
-      // with a "name" key indicating the preset to load; additinoal key/value
-      // pairs are assumed to be configuration for the preset. See the documentation
-      // for a given preset for configuration available.
-      name = path.name.toLowerCase()
-      if (nodePath.isAbsolute(path.name)) {
-        absolutePath = path.name
-      }
-    } else {
-      throw Error('preset must be string or object with key name')
+/**
+ * @typedef {{ name: string }} PresetParams
+ */
+
+/**
+ * Trying to add 'conventional-changelog-' prefix to preset name if it is a shorthand.
+ * @param {string} preset - Absolute path, package name or shorthand preset name.
+ * @returns Variants of preset names.
+ */
+function resolvePresetNameVariants (preset) {
+  if (path.isAbsolute(preset)) {
+    return [preset]
+  }
+
+  let scope = ''
+  let name = preset.toLocaleLowerCase()
+
+  if (preset[0] === '@') {
+    const parts = preset.split('/')
+
+    scope = parts.shift() + '/'
+
+    if (scope === '@conventional-changelog/') {
+      return [preset]
     }
 
-    if (!absolutePath) {
-      if (name[0] === '@') {
-        const parts = name.split('/')
-        scope = parts.shift() + '/'
-        name = parts.join('/')
-      }
+    name = parts.join('/')
+  }
 
-      if (!name.startsWith('conventional-changelog-')) {
-        name = `conventional-changelog-${name}`
+  if (!name.startsWith('conventional-changelog-')) {
+    name = `conventional-changelog-${name}`
+  }
+
+  const altPreset = `${scope}${name}`
+
+  if (altPreset !== preset) {
+    return [altPreset, preset]
+  }
+
+  return [preset]
+}
+
+/**
+ * Loads module with fallbacks.
+ * @param {ModuleLoader} moduleLoader - Function that loads module.
+ * @param {string[]} variants - Variants of module name to try.
+ * @returns {Promise<any>} Loaded module.
+ */
+async function loadWithFallbacks (moduleLoader, variants) {
+  let error = null
+
+  for (const variant of variants) {
+    try {
+      return await moduleLoader(variant)
+    } catch (err) {
+      if (!error) {
+        error = err
       }
     }
+  }
 
+  throw error
+}
+
+/**
+ * Gets default export from CommonJS or ES module.
+ * @param {object} module
+ * @returns {object}
+ */
+function getModuleDefaultExport (module) {
+  if ((module.__esModule || Object.getPrototypeOf(module) === null) && module.default) {
+    return module.default
+  }
+
+  return module
+}
+
+/**
+ * Creates preset loader.
+ * @param {ModuleLoader} moduleLoader - Function that loads module.
+ * @returns {(presetOrParams: string | PresetParams) => Promise<any>} Function that loads preset.
+ */
+function createPresetLoader (moduleLoader) {
+  return async function loadPreset (presetOrParams) {
+    let preset = ''
+    let params = null
+
+    if (typeof presetOrParams === 'string') {
+      preset = presetOrParams
+    } else
+    if (typeof presetOrParams === 'object' && typeof presetOrParams.name === 'string') {
+      preset = presetOrParams.name
+      params = presetOrParams
+    } else {
+      throw Error('Preset must be string or object with property `name`')
+    }
+
+    const presetNameVariants = resolvePresetNameVariants(preset)
+    let createPreset = null
+
     try {
-      const config = requireMethod(absolutePath || `${scope}${name}`)
-      // rather than returning a promise, presets can return a builder function
-      // which accepts a config object (allowing for customization) and returns
-      // a promise.
-      if (config && !config.then && typeof path === 'object') {
-        return config(path)
-      } else {
-        // require returned a promise that resolves to a config object.
-        return config
-      }
-    } catch (_) {
-      throw Error('does not exist')
+      createPreset = getModuleDefaultExport(await loadWithFallbacks(moduleLoader, presetNameVariants))
+    } catch (err) {
+      throw Error(`Unable to load the "${preset}" preset. Please make sure it's installed.`, { cause: err })
     }
+
+    return params
+      ? await createPreset(params)
+      : await createPreset()
   }
 }

package.json

 {
   "name": "conventional-changelog-preset-loader",
-  "version": "3.0.0",
+  "version": "4.0.0",
   "description": "Configuration preset loader for `conventional-changelog`.",
@@ -16,3 +16,3 @@ "repository": {
   "engines": {
-    "node": ">=14"
+    "node": ">=16"
   },
@@ -27,9 +27,5 @@ "files": [
   "devDependencies": {
-    "conventional-changelog-angular": "^6.0.0",
-    "conventional-changelog-conventionalcommits": "^6.0.0",
-    "sinon": "^12.0.1"
-  },
-  "scripts": {
-    "test-windows": "mocha --timeout 30000"
+    "conventional-changelog-angular": "^7.0.0",
+    "conventional-changelog-conventionalcommits": "^7.0.0"
   }
 }

README.md

@@ -1,41 +0,98 @@
-#  [![NPM version][npm-image]][npm-url] [![Build Status: Linux][travis-image]][travis-url] [![Build Status: Windows][appveyor-image]][appveyor-url] [![Dependency Status][daviddm-image]][daviddm-url] [![Coverage Status][coverage-image]][coverage-url]
+# conventional-changelog-preset-loader
 
-> Configuration preset loader for `conventional-changelog`.
+[![NPM version][npm]][npm-url]
+[![Node version][node]][node-url]
+[![Dependencies status][deps]][deps-url]
+[![Build status][build]][build-url]
+[![Coverage status][coverage]][coverage-url]
 
+[npm]: https://img.shields.io/npm/v/conventional-changelog-preset-loader.svg
+[npm-url]: https://npmjs.com/package/conventional-changelog-preset-loader
+
+[node]: https://img.shields.io/node/v/conventional-changelog-preset-loader.svg
+[node-url]: https://nodejs.org
+
+[deps]: https://img.shields.io/librariesio/release/npm/conventional-changelog-preset-loader
+[deps-url]: https://libraries.io/npm/conventional-changelog-preset-loader/tree
+
+[build]: https://img.shields.io/github/actions/workflow/status/conventional-changelog/conventional-changelog/ci.yaml?branch=master
+[build-url]: https://github.com/conventional-changelog/conventional-changelog/actions
+
+[coverage]: https://coveralls.io/repos/github/conventional-changelog/conventional-changelog/badge.svg?branch=master
+[coverage-url]: https://coveralls.io/github/conventional-changelog/conventional-changelog?branch=master
+
+Configuration preset loader for `conventional-changelog`.
+
 ## Usage
 
-```sh
-$ npm install --save conventional-changelog-preset-loader
+Install:
+
+```bash
+# yarn
+yarn add -D conventional-changelog-preset-loader
+# pnpm
+pnpm add -D conventional-changelog-preset-loader
+# npm
+npm i -D conventional-changelog-preset-loader
 ```
 
+Import `loadPreset` function from the package and use it to load the preset:
+
 ```js
-var conventionalChangelogPresetLoader = require('conventional-changelog-preset-loader');
+const { loadPreset } = require('conventional-changelog-preset-loader')
 
-configuration = conventionalChangelogPresetLoader(`angular`);
+loadPreset('angular').then((config) => {
+  // do something with config object
+})
 ```
 
+By default it uses `import` to load preset. If you want to use `require` instead, you can create own loader with `createPresetLoader` function:
 
-The string that is passed to the preset loader is manipulated by prepending `conventional-changelog` to the name.
+```js
+const { createPresetLoader } = require('conventional-changelog-preset-loader')
 
+const loadPreset = createPresetLoader(require)
+```
+
+## Preset package resolution
+
+Firstly, loader will try prepend `conventional-changelog` to the preset name and load it.
+
 For example:
-* `angular` => `conventional-changelog-angular`
-* `angular/preset/path` => `conventional-changelog-angular/preset/path`
-* `@scope/angular` => `@scope/conventional-changelog-angular`
-* `@scope/angular/preset/path` => `@scope/conventional-changelog-angular/preset/path`
+- `angular` => `conventional-changelog-angular`
+- `angular/preset/path` => `conventional-changelog-angular/preset/path`
+- `@scope/angular` => `@scope/conventional-changelog-angular`
+- `@scope/angular/preset/path` => `@scope/conventional-changelog-angular/preset/path`
 
-Will return whatever is exported by the preset package. That may be a configuration object, a function, or a promise.
+If it fails, it will try to load preset using name as is.
 
+## Preset exports
+
+Preset package should have default export which is a async (returns `Promise`) or sync function that accepts optional `options` object and returns the config object:
+
+```js
+export default function createPreset(options) {
+  return {
+    // config
+  }
+}
+```
+
+## Preset options
+
+To pass options to the preset, `loadPreset` function accepts object with `name` property as first argument:
+
+```js
+const { loadPreset } = require('conventional-changelog-preset-loader')
+
+loadPreset({
+  name: 'angular',
+  ...presetOptions
+}).then((config) => {
+  // do something with config object
+})
+```
+
 ## License
 
 MIT © [Steve Mao](https://github.com/stevemao)
-
-[npm-image]: https://badge.fury.io/js/conventional-changelog-preset-loader.svg
-[npm-url]: https://npmjs.org/package/conventional-changelog-preset-loader
-[travis-image]: https://travis-ci.org/conventional-changelog/conventional-changelog-preset-loader.svg?branch=master
-[travis-url]: https://travis-ci.org/conventional-changelog/conventional-changelog-preset-loader
-[appveyor-image]: https://ci.appveyor.com/api/projects/status/baoumm34w8c5o0hv/branch/master?svg=true
-[appveyor-url]: https://ci.appveyor.com/project/stevemao/conventional-changelog-preset-loader/branch/master
-[daviddm-image]: https://david-dm.org/conventional-changelog/conventional-changelog-preset-loader.svg?theme=shields.io
-[daviddm-url]: https://david-dm.org/conventional-changelog/conventional-changelog-preset-loader
-[coverage-image]: https://coveralls.io/repos/github/conventional-changelog/conventional-changelog/badge.svg?branch=master
-[coverage-url]: https://coveralls.io/github/conventional-changelog/conventional-changelog?branch=master

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