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build.js
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build.js
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var fs = require('fs');
var marked = require('marked');
var hljs = require('highlight.js');
// Various transformation utils
var transform = {
commentLineFeeds: function (data) {
return data
.replace(/(<!-- (?:slide|\.).*? -->)\n([^\n])/g, '$1\n\n$2');
},
renderIframe: function (data) {
return data
.replace(/<!-- render iframe(?: : ([0-9]+))? -->(\n\n```.*?\n([\s\S.]*?)\n```)/g, function (all, height, markedCode, innerCode) {
height = height || 300;
return '<!-- .rendered-iframe -->' + markedCode + '\n\n' +
'<iframe class="rendered-iframe" src="data:text/html,' +
encodeURIComponent(innerCode) +
'" height="' + height + 'px"></iframe>';
});
},
highlight: function (data) {
return data
.replace(/```(.*?)\n([\s\S.]*?)\n```/g, function (all, lang, code) {
if (lang != null && lang !== '') {
// highlight.js doesn't recognize html but xml
var hljsLang = /^x?html\d*$/.test(lang) ? 'xml' : lang;
code = '<pre data-language="' + lang + '"><code class="language-' + lang + '">' + hljs.highlight(hljsLang, code).value + '</code></pre>';
} else {
code = '<pre><code class="language-unknown">' + hljs.highlightAuto(code).value + '</code></pre>';
}
return code;
});
},
tocTiles: function (data, toc) {
return data
.replace(/<h2(.*?)>(.*?)<\/h2>/g, function (all, attributes, title) {
var slug = title
.toLowerCase()
.trim()
.replace(/[^a-z\d]/g, '-')
.replace(/-+/g, '-')
.replace(/-$/, '');
toc.push({title: title, slug: slug});
return '<h2' + attributes + ' id="' + slug + '">' + title + '</h2>';
});
},
insertToc: function (data, toc) {
var starToc = '<div class="toc well">\n<ul class="nav nav-list">\n<li class="nav-header">Table of contents</li>\n',
htmlToc,
endToc = '\n</ul>\n</div>';
htmlToc = starToc + toc.map(this.mapToc).join('\n') + endToc;
return data.replace(/<!-- toc -->/, htmlToc);
},
mapToc: function (title) {
return '<li><a href="#' + title.slug + '">' + title.title + '</a></li>';
},
headAndMetas: function (data) {
return data
.replace(/<!-- title : (.*?) -->/, '<title>$1</title>')
.replace(/<!-- author : (.*?) -->/, '<meta name="author" content="$1">')
.replace(/<!-- description : (.*?) -->/, '<meta name="description" content="$1">')
.replace(/<!-- keywords : (.*?) -->/, '<meta name="keywords" content="$1">');
},
dZSections: function (data) {
return data
.replace(/<!-- slide(?: : (.+))? -->\n/, '<section class="$1">')
.replace(/<!-- slide(?: : (.+))? -->\n/g, '</section>\n\n<section class="$1">')
.replace(/<section class="">/g, '<section>');
},
blockClasses: function (data) {
return data
.replace(/<!-- \.(.+?) -->(\n)*<(.+?)>/g, function (all, classes, lineBreaks, tagAndAttr) {
classes = classes.replace(/\./g, ' ');
return lineBreaks + '<' + tagAndAttr + ' class="' + classes + '">'
});
},
outputLineFeeds: function (data) {
return data
.replace(/(\n)*<\/p>/g, '</p>')
.replace(/<p>(<.*>)<\/p>/g, '$1');
}
};
// Main transformation
var markleft = function (data, fileName) {
var start = '<!DOCTYPE html>\n<meta charset="utf-8">\n<meta name="viewport" content="width=device-width">\n',
toc = [],
end = data.indexOf('<!-- slide') ? '\n</section>' : '\n';
data = transform.commentLineFeeds(data);
data = transform.renderIframe(data);
data = transform.highlight(data);
// Standard markdown transformation
data = marked(data);
data = transform.tocTiles(data, toc);
data = transform.insertToc(data, toc);
data = transform.headAndMetas(data);
data = transform.dZSections(data);
data = transform.blockClasses(data);
data = transform.outputLineFeeds(data);
return start + data + end;
};
// Get things done NOW!
['prezas', 'labs']
.forEach(function (outputDir) {
var inputDir = outputDir + '-md';
if (!fs.existsSync(outputDir)) {
fs.mkdirSync(outputDir)
}
fs.readdirSync(inputDir)
.forEach(function (fileName) {
var mdContents = fs.readFileSync(inputDir + '/' + fileName, 'utf-8'),
htmlContents = markleft(mdContents, fileName);
console.log(inputDir + '/' + fileName + ' updated ;-)');
fs.writeFileSync(outputDir + '/' + fileName.replace(/\.md$/, ".html"), htmlContents);
});
});