index.js

var fs = require('fs')

var codeBlockOne = fs.readFileSync('code-block-1.txt', 'utf-8')
var codeBlockTwo = fs.readFileSync('code-block-2.txt', 'utf-8')

var blocks = [codeBlockOne, codeBlockTwo]

blocks.forEach((block, i) => {
  fs.writeFileSync('highlighted-block-' + i + '.txt', highlight(block))
})

function highlight (block) {
  return block
    .replace(/class="at"/g, 'style="color: #005cc5;"')
    .replace(/class="co"/g, 'style="color: #6a737d;"')
    .replace(/class="kw"/g, 'style="color: #d73a49;"')
    .replace(/class="st"/g, 'style="color: #22863a;"')
    .replace(/ class="op"/g, '')
    .replace(/ class="va"/g, '')
    .replace(/ class="dt"/g, '')
    .replace(/ class="sourceCode js"/g, '')
    .replace(/ class="sourceCode javascript"/g, '')
}

onChange.html

<pre><code><span style="color: #6a737d;">// onChange.js</span>
<span style="color: #d73a49;">var</span> notify <span>=</span> <span style="color: #005cc5;">require</span>(<span style="color: #22863a;">&#39;wsk&#39;</span>).<span style="color: #005cc5;">notify</span><span>;</span>

<span>module</span>.<span style="color: #005cc5;">exports</span> <span>=</span> <span style="color: #d73a49;">function</span> (eventType<span>,</span> filePath<span>,</span> options) <span>{</span>
  <span style="color: #6a737d;">// Put library transform here</span>
  <span style="color: #6a737d;">// Write the transformed file with `fs.writeFile`, for example</span>
  <span style="color: #6a737d;">// Notify user the file was written</span>
  <span style="color: #005cc5;">notify</span>(<span>{</span>
    <span>message</span><span>:</span> <span style="color: #22863a;">&#39;Compiled CSS file...&#39;</span>  <span>,</span>
    <span>value</span><span>:</span> <span>filePath</span>.<span style="color: #005cc5;">replace</span>(<span style="color: #22863a;">&#39;src&#39;</span><span>,</span> <span style="color: #22863a;">&#39;public&#39;</span>)<span>,</span>
    <span>display</span><span>:</span> <span style="color: #22863a;">&#39;compile&#39;</span>
  <span>}</span>)<span>;</span>
<span>};</span></code></pre>

sass-watch.html

<pre><code><span style="color: #6a737d;">// sass-watch.js</span>

<span style="color: #d73a49;">var</span> watcher <span>=</span> <span style="color: #005cc5;">require</span>(<span style="color: #22863a;">&#39;wsk&#39;</span>).<span style="color: #005cc5;">watcher</span><span>;</span>

<span style="color: #d73a49;">var</span> watchGroup <span>=</span> <span>{</span>
  <span>serviceName</span><span>:</span> <span style="color: #22863a;">&#39;sass&#39;</span><span>,</span>
  <span>path</span><span>:</span> <span style="color: #22863a;">&#39;src/css/*.scss&#39;</span><span>,</span>
  <span>events</span><span>:</span> [
    <span>{</span>
      <span>type</span><span>:</span> <span style="color: #22863a;">&#39;change&#39;</span><span>,</span>
      <span>taskFiles</span><span>:</span> <span style="color: #22863a;">&#39;build/tasks/sass/onChange.js&#39;</span><span>,</span>
      <span>options</span><span>:</span> <span>{</span>
        <span>foo</span><span>:</span> <span style="color: #d73a49;">true</span>
      <span>}</span>
    <span>},</span>
    <span>{</span>
      <span>type</span><span>:</span> <span style="color: #22863a;">&#39;change&#39;</span><span>,</span>
      <span>taskFiles</span><span>:</span> <span style="color: #22863a;">&#39;build/tasks/sass/onAdd.js&#39;</span>
    <span>},</span>
    <span>{</span>
      <span>type</span><span>:</span> <span style="color: #22863a;">&#39;unlink&#39;</span><span>,</span>
      <span>taskFiles</span><span>:</span> <span style="color: #22863a;">&#39;build/tasks/sass/onUnlink.js&#39;</span>
    <span>}</span>
  ]
<span>};</span>

<span>watcher</span>.<span style="color: #005cc5;">add</span>(watchGroup)<span>;</span></code></pre>