base-loader/index.js

Base loader for Template-based applications.

/*!
 * base-loader <https://github.com/jonschlinkert/base-loader>
 *
 * Copyright (c) 2015, Jon Schlinkert.
 * Licensed under the MIT License.
 */

'use strict';

var path = require('path');
var relative = require('relative');
var files = require('map-files');

module.exports = function base_(args) {
  args = arrayify(args);
  var first = args[1];
  var isOptions = typeof first === 'object';
  if (isOptions) {
    first.renameKey = first.renameKey || renameKey;
  }
  if (isOptions && first.hasOwnProperty('content')) {
    return normalize(args);
  }
  return files.apply(files, args);
};

function normalize(args) {
  var fp = args[0];
  var file = args[1];
  var name = basename(fp);
  file.path = fp;
  var res = {};
  res[name] = file;
  return res;
}

/**
 * Cast `val` to an array.
 */

function arrayify(val) {
  var isArray = Array.isArray(val);
  if (typeof val !== 'string' && !isArray) {
    throw new Error('base-loader: arrayify() expects a string or array.');
  }
  return isArray ? val : [val];
}

/**
 * Strip a file extension from a filepath.
 */

function stripExtension(fp) {
  if (typeof fp !== 'string') {
    throw new Error('base-loader: stripExtension() expects a string.');
  }
  return fp.substr(0, fp.length - path.extname(fp).length);
}

/**
 * Default `renameKey` function.
 */

function renameKey(fp, acc, opts) {
  if (typeof fp !== 'string') {
    throw new Error('base-loader: renameKey() expects a string.');
  }
  fp = relative.toBase(opts.cwd, fp);
  return stripExtension(fp);
}