137 lines
3.1 KiB
JavaScript
Executable File
137 lines
3.1 KiB
JavaScript
Executable File
#!/usr/bin/env node
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var fs = require('fs'),
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path = require('path');
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var Mustache = require('..');
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var pkg = require('../package');
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var partials = {};
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var partialsPaths = [];
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var partialArgIndex = -1;
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while ((partialArgIndex = process.argv.indexOf('-p')) > -1) {
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partialsPaths.push(process.argv.splice(partialArgIndex, 2)[1]);
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}
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var viewArg = process.argv[2];
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var templateArg = process.argv[3];
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var outputArg = process.argv[4];
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if (hasVersionArg()) {
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return console.log(pkg.version);
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}
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if (!templateArg || !viewArg) {
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console.error('Syntax: mustache <view> <template> [output]');
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process.exit(1);
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}
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run(readPartials, readView, readTemplate, render, toStdout);
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/**
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* Runs a list of functions as a waterfall.
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* Functions are runned one after the other in order, providing each
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* function the returned values of all the previously invoked functions.
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* Each function is expected to exit the process if an error occurs.
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*/
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function run (/*args*/) {
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var values = [];
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var fns = Array.prototype.slice.call(arguments);
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function invokeNextFn (val) {
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values.unshift(val);
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if (fns.length === 0) return;
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invoke(fns.shift());
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}
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function invoke (fn) {
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fn.apply(null, [invokeNextFn].concat(values));
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}
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invoke(fns.shift());
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}
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function readView (cb) {
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var view = isStdin(viewArg) ? process.openStdin() : fs.createReadStream(viewArg);
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streamToStr(view, function onDone (str) {
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cb(parseView(str));
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});
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}
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function parseView (str) {
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try {
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return JSON.parse(str);
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} catch (ex) {
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console.error(
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'Shooot, could not parse view as JSON.\n' +
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'Tips: functions are not valid JSON and keys / values must be surround with double quotes.\n\n' +
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ex.stack);
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process.exit(1);
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}
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}
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function readPartials (cb) {
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if (!partialsPaths.length) return cb();
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var partialPath = partialsPaths.pop();
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var partial = fs.createReadStream(partialPath);
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streamToStr(partial, function onDone (str) {
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partials[getPartialName(partialPath)] = str;
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readPartials(cb);
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});
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}
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function readTemplate (cb) {
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var template = fs.createReadStream(templateArg);
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streamToStr(template, cb);
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}
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function render (cb, templateStr, jsonView) {
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cb(Mustache.render(templateStr, jsonView, partials));
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}
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function toStdout (cb, str) {
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if (outputArg) {
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cb(fs.writeFileSync(outputArg, str));
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} else {
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cb(process.stdout.write(str));
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}
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}
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function streamToStr (stream, cb) {
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var data = '';
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stream.on('data', function onData (chunk) {
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data += chunk;
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}).once('end', function onEnd () {
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cb(data.toString());
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}).on('error', function onError (err) {
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if (wasNotFound(err)) {
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console.error('Could not find file:', err.path);
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} else {
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console.error('Error while reading file:', err.message);
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}
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process.exit(1);
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});
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}
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function isStdin (view) {
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return view === '-';
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}
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function wasNotFound (err) {
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return err.code && err.code === 'ENOENT';
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}
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function hasVersionArg () {
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return ['--version', '-v'].some(function matchInArgs (opt) {
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return process.argv.indexOf(opt) > -1;
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});
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}
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function getPartialName (filename) {
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return path.basename(filename, '.mustache');
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}
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