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7 |
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8 | 'use strict';
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9 | var path = require('path');
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10 | var dargs = require('dargs');
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11 | var numCPUs = require('os').cpus().length;
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12 | var async = require('async');
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13 | var chalk = require('chalk');
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14 | var spawn = require('win-spawn');
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15 | var which = require('which');
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16 |
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17 | module.exports = function (grunt) {
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18 | var bannerCallback = function (filename, banner) {
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19 | var content;
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20 | grunt.log.verbose.writeln('Writing CSS banner for ' + filename);
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21 |
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22 | content = grunt.file.read(filename);
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23 | grunt.file.write(filename, banner + grunt.util.linefeed + content);
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24 | };
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25 |
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26 | grunt.registerMultiTask('sass', 'Compile Sass to CSS', function () {
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27 | var cb = this.async();
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28 | var options = this.options();
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29 | var passedArgs;
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30 | var bundleExec;
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31 | var banner;
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32 |
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33 | try {
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34 | which.sync('sass');
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35 | } catch (err) {
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36 | return grunt.warn(
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37 | '\nYou need to have Ruby and Sass installed and in your PATH for this task to work.\n' +
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38 | 'More info: https://github.com/gruntjs/grunt-contrib-sass\n'
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39 | );
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40 | }
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41 |
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42 |
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43 | if (options.banner) {
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44 | banner = options.banner;
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45 | delete options.banner;
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46 | }
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47 |
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48 | passedArgs = dargs(options, ['bundleExec']);
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49 | bundleExec = options.bundleExec;
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50 |
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51 | async.eachLimit(this.files, numCPUs, function (file, next) {
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52 | var src = file.src[0];
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53 | if (typeof src !== 'string') {
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54 | src = file.orig.src[0];
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55 | }
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56 |
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57 | if (!grunt.file.exists(src)) {
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58 | grunt.log.warn('Source file "' + src + '" not found.');
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59 | return next();
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60 | }
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61 |
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62 | if (path.basename(src)[0] === '_') {
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63 | return next();
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64 | }
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65 |
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66 | var args = [
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67 | src,
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68 | file.dest,
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69 | '--load-path', path.dirname(src)
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70 | ].concat(passedArgs);
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71 |
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72 | var bin = 'sass';
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73 |
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74 | if (bundleExec) {
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75 | bin = 'bundle';
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76 | args.unshift('exec', 'sass');
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77 | }
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78 |
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79 |
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80 | if (path.extname(src) === '.css') {
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81 | args.push('--scss');
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82 | }
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83 |
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84 |
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85 | grunt.file.write(file.dest, '');
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86 |
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87 | var cp = spawn(bin, args, {stdio: 'inherit'});
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88 |
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89 | cp.on('error', function (err) {
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90 | grunt.warn(err);
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91 | });
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92 |
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93 | cp.on('close', function (code) {
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94 | if (code > 0) {
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95 | return grunt.warn('Exited with error code ' + code);
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96 | }
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97 |
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98 |
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99 | if (banner) {
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100 | bannerCallback(file.dest, banner);
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101 | }
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102 |
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103 | grunt.log.writeln('File ' + chalk.cyan(file.dest) + ' created.');
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104 | next();
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105 | });
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106 | }, cb);
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107 | });
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108 | };
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