为什么我使用Webpack获得2个版本



我需要知道构建的哈希,所以我试图在回调函数中捕获它:

const compiler = webpack(webpackConfig, function (err, stats) {
  debug("Hash", stats.hash)
})

但当我这样做的时候,会发生一些奇怪的事情:我得到了2个构建,只能捕获1个哈希——显然我需要另一个,而不是回调中的那个。

回调时的输出:

app:server Hash +7s ea34c7a4d34baae1c353
webpack built d796ba7633cf5b1023a0 in 6673ms
Hash: ea34c7a4d34baae1c353
Version: webpack 1.13.1
Time: 6649ms
Asset       Size  Chunks             Chunk Names
app.ea34c7a4d34baae1c353.js    1.27 MB       0  [emitted]  app
1.counter.ea34c7a4d34baae1c353.js     247 kB       1  [emitted]  counter
vendor.ea34c7a4d34baae1c353.js     389 kB       2  [emitted]  vendor
app.ea34c7a4d34baae1c353.js.map    1.54 MB       0  [emitted]  app
1.counter.ea34c7a4d34baae1c353.js.map     303 kB       1  [emitted]  counter
vendor.ea34c7a4d34baae1c353.js.map     466 kB       2  [emitted]  vendor
favicon.ico    24.8 kB          [emitted]
index.html  595 bytes          [emitted]
Child html-webpack-plugin for "index.html":
Asset    Size  Chunks       Chunk Names
index.html  553 kB       0
webpack: bundle is now VALID.
  Hash: d796ba7633cf5b1023a0
Version: webpack 1.13.1
Time: 6673ms
Asset       Size  Chunks             Chunk Names
app.d796ba7633cf5b1023a0.js    1.17 MB       0  [emitted]  app
vendor.d796ba7633cf5b1023a0.js     389 kB       1  [emitted]  vendor
app.d796ba7633cf5b1023a0.js.map    1.42 MB       0  [emitted]  app
vendor.d796ba7633cf5b1023a0.js.map     466 kB       1  [emitted]  vendor
favicon.ico    24.8 kB          [emitted]
index.html  595 bytes          [emitted]
Child html-webpack-plugin for "index.html":
Asset    Size  Chunks       Chunk Names
index.html  553 kB       0
webpack: bundle is now VALID.

无回调时输出:

Hash: c5e31d1eb986b7ef318d
Version: webpack 1.13.1
Time: 3891ms
Asset       Size  Chunks             Chunk Names
app.c5e31d1eb986b7ef318d.js    1.26 MB       0  [emitted]  app
1.counter.c5e31d1eb986b7ef318d.js    30.6 kB       1  [emitted]  counter
vendor.c5e31d1eb986b7ef318d.js     389 kB       2  [emitted]  vendor
app.c5e31d1eb986b7ef318d.js.map    1.54 MB       0  [emitted]  app
1.counter.c5e31d1eb986b7ef318d.js.map    37.9 kB       1  [emitted]  counter
vendor.c5e31d1eb986b7ef318d.js.map     466 kB       2  [emitted]  vendor
favicon.ico    24.8 kB          [emitted]
index.html  595 bytes          [emitted]
Child html-webpack-plugin for "index.html":
Asset    Size  Chunks       Chunk Names
index.html  553 kB       0
webpack: bundle is now VALID.

文件:https://github.com/davezuko/react-redux-starter-kit/blob/master/server/main.js

好的,我发现了。。。在Webpack的源代码中,如果有回调给webpack(options, callback),那么它会自动运行自己:

function webpack(options, callback) {
    ...
    if(callback) {
      ...
      compiler.run(callback);
    }
    return compiler;
}

如果有人想添加回调,请按如下方式添加plugin

compiler.plugin("done", stats => {
  debug(hash)
})

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