transform-less.js

/* Released under the BSD 2-Clause License
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 * Copyright © 2018-present, terrestris GmbH & Co. KG and GeoStyler contributors
 * All rights reserved.
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 *
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
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 * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE
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const fs = require('fs');
const readdirp = require('readdirp');
const childProcess = require('child_process');
const path = require('path');
const replace = require('replace-in-file');

// Transform less
(async function() {
  const files = await readdirp.promise('dist', { fileFilter: '*.less' });
  files.forEach(file => {
    const out = file.fullPath.replace('.less', '.css');
    const less = childProcess.exec(`${path.join('node_modules', '.bin', 'lessc')} ${file.fullPath} ${out}`);
    less.on('exit', function (code) {
      fs.unlink(file.fullPath, (err) => {
        if (err) throw err;
      });
    });
  });
})();

// Replace less imports with css imports
const requireRegex = /(require\(".+\.)less"\)/g;
const requireOptions = {
  files: 'dist/**/*.js',
  from: requireRegex,
  to: match => match.replace(requireRegex, '$1css")')
};

const importRegex = /(import '.+\.)less'/g;
const importOptions = {
  files: 'dist/**/*.d.ts',
  from: importRegex,
  to: match => match.replace(importRegex, '$1css\'')
};

replace(requireOptions).catch(error => console.error);
replace(importOptions).catch(error => console.error);