1 | #!/usr/bin/env node
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2 |
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3 | var fs = require('fs'),
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4 | path = require('path');
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5 |
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6 | var Mustache = require('..');
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7 | var pkg = require('../package');
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8 | var partials = {};
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9 |
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10 | var partialsPaths = [];
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11 | var partialArgIndex = -1;
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12 |
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13 | while ((partialArgIndex = process.argv.indexOf('-p')) > -1) {
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14 | partialsPaths.push(process.argv.splice(partialArgIndex, 2)[1]);
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15 | }
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16 |
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17 | var viewArg = process.argv[2];
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18 | var templateArg = process.argv[3];
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19 | var outputArg = process.argv[4];
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20 |
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21 | if (hasVersionArg()) {
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22 | return console.log(pkg.version);
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23 | }
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24 |
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25 | if (!templateArg || !viewArg) {
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26 | console.error('Syntax: mustache <view> <template> [output]');
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27 | process.exit(1);
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28 | }
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29 |
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30 | run(readPartials, readView, readTemplate, render, toStdout);
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31 |
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32 | /**
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33 | * Runs a list of functions as a waterfall.
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34 | * Functions are runned one after the other in order, providing each
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35 | * function the returned values of all the previously invoked functions.
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36 | * Each function is expected to exit the process if an error occurs.
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37 | */
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38 | function run (/*args*/) {
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39 | var values = [];
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40 | var fns = Array.prototype.slice.call(arguments);
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41 |
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42 | function invokeNextFn (val) {
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43 | values.unshift(val);
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44 | if (fns.length === 0) return;
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45 | invoke(fns.shift());
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46 | }
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47 |
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48 | function invoke (fn) {
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49 | fn.apply(null, [invokeNextFn].concat(values));
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50 | }
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51 |
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52 | invoke(fns.shift());
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53 | }
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54 |
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55 | function readView (cb) {
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56 | var view = isStdin(viewArg) ? process.openStdin() : fs.createReadStream(viewArg);
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57 |
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58 | streamToStr(view, function onDone (str) {
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59 | cb(parseView(str));
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60 | });
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61 | }
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62 |
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63 | function parseView (str) {
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64 | try {
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65 | return JSON.parse(str);
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66 | } catch (ex) {
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67 | console.error(
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68 | 'Shooot, could not parse view as JSON.\n' +
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69 | 'Tips: functions are not valid JSON and keys / values must be surround with double quotes.\n\n' +
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70 | ex.stack);
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71 |
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72 | process.exit(1);
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73 | }
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74 | }
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75 |
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76 | function readPartials (cb) {
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77 | if (!partialsPaths.length) return cb();
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78 | var partialPath = partialsPaths.pop();
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79 | var partial = fs.createReadStream(partialPath);
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80 | streamToStr(partial, function onDone (str) {
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81 | partials[getPartialName(partialPath)] = str;
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82 | readPartials(cb);
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83 | });
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84 | }
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85 |
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86 | function readTemplate (cb) {
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87 | var template = fs.createReadStream(templateArg);
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88 | streamToStr(template, cb);
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89 | }
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90 |
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91 | function render (cb, templateStr, jsonView) {
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92 | cb(Mustache.render(templateStr, jsonView, partials));
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93 | }
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94 |
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95 | function toStdout (cb, str) {
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96 | if (outputArg) {
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97 | cb(fs.writeFileSync(outputArg, str));
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98 | } else {
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99 | cb(process.stdout.write(str));
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100 | }
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101 | }
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102 |
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103 | function streamToStr (stream, cb) {
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104 | var data = '';
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105 |
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106 | stream.on('data', function onData (chunk) {
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107 | data += chunk;
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108 | }).once('end', function onEnd () {
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109 | cb(data.toString());
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110 | }).on('error', function onError (err) {
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111 | if (wasNotFound(err)) {
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112 | console.error('Could not find file:', err.path);
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113 | } else {
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114 | console.error('Error while reading file:', err.message);
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115 | }
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116 | process.exit(1);
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117 | });
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118 | }
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119 |
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120 | function isStdin (view) {
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121 | return view === '-';
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122 | }
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123 |
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124 | function wasNotFound (err) {
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125 | return err.code && err.code === 'ENOENT';
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126 | }
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127 |
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128 | function hasVersionArg () {
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129 | return ['--version', '-v'].some(function matchInArgs (opt) {
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130 | return process.argv.indexOf(opt) > -1;
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131 | });
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132 | }
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133 |
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134 | function getPartialName (filename) {
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135 | return path.basename(filename, '.mustache');
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136 | }
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