1 | var fs = require('fs');
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2 | var _ = require('lodash');
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3 | var util = require('util');
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4 |
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5 | module.exports.copyFile = function(source, target, cb) {
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6 | cb = _.once(cb);
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7 |
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8 | var rd = fs.createReadStream(source);
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9 | rd.on('error', function(err) {
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10 | cb(err);
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11 | });
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12 |
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13 | var wr = fs.createWriteStream(target);
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14 | wr.on('error', function(err) {
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15 | cb(err);
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16 | });
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17 | wr.on('close', function(err) {
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18 | cb(err);
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19 | });
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20 | rd.pipe(wr);
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21 | };
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22 |
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23 |
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24 |
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25 |
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26 |
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27 | module.exports.captureOutput = function captureOutput() {
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28 | var old_stdout_write = process.stdout.write;
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29 | var old_console_error = console.error;
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30 |
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31 | var captured = '';
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32 | var callback = function(string) {
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33 | captured += string;
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34 | };
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35 |
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36 | process.stdout.write = (function(write) {
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37 | return function(string, encoding, fd) {
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38 | var args = _.toArray(arguments);
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39 | write.apply(process.stdout, args);
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40 |
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41 |
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42 | callback.call(callback, string);
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43 | };
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44 | }(process.stdout.write));
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45 |
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46 | console.error = (function(log) {
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47 | return function() {
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48 | var args = _.toArray(arguments);
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49 | args.unshift('[ERROR]');
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50 | console.log.apply(console.log, args);
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51 |
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52 |
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53 | callback.call(callback, util.format(args));
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54 | };
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55 | }(console.error));
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56 |
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57 | return {
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58 | output: function output(err, reply) {
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59 | return captured;
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60 | },
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61 | release: function done(err, reply) {
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62 | process.stdout.write = old_stdout_write;
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63 | console.error = old_console_error;
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64 | return captured;
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65 | }
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66 | }
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67 | };
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