1 |
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2 |
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4 |
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5 | "use strict";
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6 |
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7 | const Stats = require("./Stats");
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8 |
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9 | class Watching {
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10 | constructor(compiler, watchOptions, handler) {
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11 | this.startTime = null;
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12 | this.invalid = false;
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13 | this.handler = handler;
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14 | this.callbacks = [];
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15 | this.closed = false;
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16 | this.suspended = false;
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17 | if (typeof watchOptions === "number") {
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18 | this.watchOptions = {
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19 | aggregateTimeout: watchOptions
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20 | };
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21 | } else if (watchOptions && typeof watchOptions === "object") {
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22 | this.watchOptions = Object.assign({}, watchOptions);
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23 | } else {
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24 | this.watchOptions = {};
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25 | }
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26 | this.watchOptions.aggregateTimeout =
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27 | this.watchOptions.aggregateTimeout || 200;
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28 | this.compiler = compiler;
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29 | this.running = true;
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30 | this.compiler.readRecords(err => {
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31 | if (err) return this._done(err);
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32 |
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33 | this._go();
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34 | });
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35 | }
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36 |
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37 | _go() {
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38 | this.startTime = Date.now();
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39 | this.running = true;
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40 | this.invalid = false;
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41 | this.compiler.hooks.watchRun.callAsync(this.compiler, err => {
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42 | if (err) return this._done(err);
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43 | const onCompiled = (err, compilation) => {
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44 | if (err) return this._done(err);
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45 | if (this.invalid) return this._done();
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46 |
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47 | if (this.compiler.hooks.shouldEmit.call(compilation) === false) {
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48 | return this._done(null, compilation);
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49 | }
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50 |
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51 | this.compiler.emitAssets(compilation, err => {
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52 | if (err) return this._done(err);
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53 | if (this.invalid) return this._done();
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54 | this.compiler.emitRecords(err => {
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55 | if (err) return this._done(err);
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56 |
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57 | if (compilation.hooks.needAdditionalPass.call()) {
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58 | compilation.needAdditionalPass = true;
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59 |
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60 | const stats = new Stats(compilation);
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61 | stats.startTime = this.startTime;
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62 | stats.endTime = Date.now();
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63 | this.compiler.hooks.done.callAsync(stats, err => {
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64 | if (err) return this._done(err);
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65 |
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66 | this.compiler.hooks.additionalPass.callAsync(err => {
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67 | if (err) return this._done(err);
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68 | this.compiler.compile(onCompiled);
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69 | });
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70 | });
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71 | return;
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72 | }
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73 | return this._done(null, compilation);
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74 | });
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75 | });
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76 | };
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77 | this.compiler.compile(onCompiled);
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78 | });
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79 | }
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80 |
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81 | _getStats(compilation) {
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82 | const stats = new Stats(compilation);
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83 | stats.startTime = this.startTime;
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84 | stats.endTime = Date.now();
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85 | return stats;
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86 | }
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87 |
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88 | _done(err, compilation) {
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89 | this.running = false;
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90 | if (this.invalid) return this._go();
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91 |
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92 | const stats = compilation ? this._getStats(compilation) : null;
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93 | if (err) {
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94 | this.compiler.hooks.failed.call(err);
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95 | this.handler(err, stats);
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96 | return;
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97 | }
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98 | this.compiler.hooks.done.callAsync(stats, () => {
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99 | this.handler(null, stats);
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100 | if (!this.closed) {
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101 | this.watch(
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102 | Array.from(compilation.fileDependencies),
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103 | Array.from(compilation.contextDependencies),
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104 | Array.from(compilation.missingDependencies)
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105 | );
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106 | }
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107 | for (const cb of this.callbacks) cb();
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108 | this.callbacks.length = 0;
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109 | });
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110 | }
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111 |
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112 | watch(files, dirs, missing) {
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113 | this.pausedWatcher = null;
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114 | this.watcher = this.compiler.watchFileSystem.watch(
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115 | files,
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116 | dirs,
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117 | missing,
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118 | this.startTime,
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119 | this.watchOptions,
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120 | (
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121 | err,
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122 | filesModified,
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123 | contextModified,
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124 | missingModified,
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125 | fileTimestamps,
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126 | contextTimestamps,
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127 | removedFiles
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128 | ) => {
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129 | this.pausedWatcher = this.watcher;
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130 | this.watcher = null;
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131 | if (err) {
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132 | return this.handler(err);
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133 | }
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134 | this.compiler.fileTimestamps = fileTimestamps;
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135 | this.compiler.contextTimestamps = contextTimestamps;
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136 | this.compiler.removedFiles = removedFiles;
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137 | if (!this.suspended) {
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138 | this._invalidate();
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139 | }
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140 | },
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141 | (fileName, changeTime) => {
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142 | this.compiler.hooks.invalid.call(fileName, changeTime);
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143 | }
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144 | );
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145 | }
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146 |
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147 | invalidate(callback) {
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148 | if (callback) {
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149 | this.callbacks.push(callback);
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150 | }
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151 | if (this.watcher) {
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152 | this.compiler.fileTimestamps = this.watcher.getFileTimestamps();
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153 | this.compiler.contextTimestamps = this.watcher.getContextTimestamps();
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154 | }
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155 | return this._invalidate();
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156 | }
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157 |
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158 | _invalidate() {
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159 | if (this.watcher) {
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160 | this.pausedWatcher = this.watcher;
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161 | this.watcher.pause();
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162 | this.watcher = null;
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163 | }
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164 |
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165 | if (this.running) {
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166 | this.invalid = true;
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167 | return false;
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168 | } else {
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169 | this._go();
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170 | }
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171 | }
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172 |
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173 | suspend() {
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174 | this.suspended = true;
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175 | this.invalid = false;
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176 | }
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177 |
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178 | resume() {
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179 | if (this.suspended) {
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180 | this.suspended = false;
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181 | this._invalidate();
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182 | }
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183 | }
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184 |
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185 | close(callback) {
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186 | const finalCallback = () => {
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187 | this.compiler.hooks.watchClose.call();
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188 | this.compiler.running = false;
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189 | this.compiler.watchMode = false;
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190 | if (callback !== undefined) callback();
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191 | };
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192 |
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193 | this.closed = true;
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194 | if (this.watcher) {
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195 | this.watcher.close();
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196 | this.watcher = null;
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197 | }
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198 | if (this.pausedWatcher) {
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199 | this.pausedWatcher.close();
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200 | this.pausedWatcher = null;
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201 | }
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202 | if (this.running) {
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203 | this.invalid = true;
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204 | this._done = finalCallback;
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205 | } else {
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206 | finalCallback();
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207 | }
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208 | }
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209 | }
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210 |
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211 | module.exports = Watching;
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