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112 lines
3.5 KiB
JavaScript
112 lines
3.5 KiB
JavaScript
/*global require,process,GLOBAL*/
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/*jslint nomen: true*/
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var CONSTANTS = {
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DIAGRAM_WIDTH: 800,
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DIAGRAM_HEIGHT: 500
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};
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GLOBAL.window = GLOBAL.window || GLOBAL; // nomnoml expects window to be defined
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(function () {
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"use strict";
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var fs = require("fs"),
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mkdirp = require("mkdirp"),
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path = require("path"),
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glob = require("glob"),
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showdown = require("github-flavored-markdown"),
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split = require("split"),
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stream = require("stream"),
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nomnoml = require('nomnoml'),
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Canvas = require('canvas'),
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options = require("minimist")(process.argv.slice(2));
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function renderNomnoml(source, target) {
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var canvas =
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new Canvas(CONSTANTS.DIAGRAM_WIDTH, CONSTANTS.DIAGRAM_HEIGHT);
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nomnoml.draw(canvas, source, 1.0);
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canvas.pngStream().pipe(fs.createWriteStream(target));
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}
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function nomnomlifier(outputDirectory, prefix) {
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var transform = new stream.Transform({ objectMode: true }),
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isBuilding = false,
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counter = 1,
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outputPath,
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source = "";
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transform._transform = function (chunk, encoding, done) {
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if (!isBuilding) {
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if (chunk.trim().indexOf("```nomnoml") === 0) {
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var outputFilename = prefix + '-' + counter + '.png';
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outputPath = path.join(outputDirectory, outputFilename);
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this.push([
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"\n![Diagram ",
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counter,
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"](",
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outputFilename,
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")\n\n"
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].join(""));
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isBuilding = true;
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source = "";
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counter += 1;
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} else {
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// Otherwise, pass through
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this.push(chunk + '\n');
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}
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} else {
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if (chunk.trim() === "```") {
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// End nomnoml
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renderNomnoml(source, outputPath);
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isBuilding = false;
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} else {
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source += chunk + '\n';
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}
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}
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done();
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};
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return transform;
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}
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function gfmifier() {
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var transform = new stream.Transform({ objectMode: true }),
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markdown = "";
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transform._transform = function (chunk, encoding, done) {
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markdown += chunk;
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done();
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};
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transform._flush = function (done) {
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this.push("<html><body>\n");
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this.push(showdown.parse(markdown));
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this.push("\n</body></html>\n");
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done();
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};
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return transform;
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}
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options['in'] = options['in'] || options.i;
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options.out = options.out || options.o;
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glob(options['in'] + "/**/*.md", {}, function (err, files) {
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files.forEach(function (file) {
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var destination = file.replace(options['in'], options.out)
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.replace(/md$/, "html"),
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destPath = path.dirname(destination),
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prefix = path.basename(destination).replace(/\.html$/, "");
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mkdirp(destPath, function (err) {
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fs.createReadStream(file, { encoding: 'utf8' })
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.pipe(split())
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.pipe(nomnomlifier(destPath, prefix))
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.pipe(gfmifier())
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.pipe(fs.createWriteStream(destination, {
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encoding: 'utf8'
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}));
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});
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});
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});
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}());
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