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feat: Suuport webpack 4 version #139

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feat: Suuport webpack 4 version #139

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104 changes: 63 additions & 41 deletions src/index.js
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Original file line number Diff line number Diff line change
Expand Up @@ -20,7 +20,7 @@ module.exports = function PurifyPlugin(options) {
throw new Error(validation.error);
}

compiler.plugin('this-compilation', (compilation) => {
const thisCompilation = (compilation) => {
const entryPaths = parse.entryPaths(options.paths);

parse.flatten(entryPaths).forEach((p) => {
Expand All @@ -29,57 +29,79 @@ module.exports = function PurifyPlugin(options) {

// Output debug information through a callback pattern
// to avoid unnecessary processing
const output = options.verbose ?
messageCb => console.info(...messageCb()) :
() => {};
const output = options.verbose
? messageCb => console.info(...messageCb())
: () => {};

compilation.plugin('additional-assets', (cb) => {
const additionalAssets = (...param) => {
let chunks;
let cb;
if (param.length === 1) {
chunks = compilation.chunks;
cb = param[0];
} else {
chunks = param[0];
cb = param[1];
}
// Go through chunks and purify as configured
compilation.chunks.forEach(
({ name: chunkName, files, modules }) => {
const assetsToPurify = search.assets(
compilation.assets, options.styleExtensions
).filter(
asset => files.indexOf(asset.name) >= 0
);
chunks.forEach(({ name: chunkName, files, modules }) => {
const assetsToPurify = search
.assets(compilation.assets, options.styleExtensions)
.filter(asset => files.indexOf(asset.name) >= 0);

output(() => [
'Assets to purify:',
assetsToPurify.map(({ name }) => name).join(', ')
]);
output(() => [
'Assets to purify:',
assetsToPurify.map(({ name }) => name).join(', ')
]);

assetsToPurify.forEach(({ name, asset }) => {
const filesToSearch = parse.entries(entryPaths, chunkName).concat(
assetsToPurify.forEach(({ name, asset }) => {
const filesToSearch = parse
.entries(entryPaths, chunkName)
.concat(
search.files(
modules, options.moduleExtensions || [], file => file.resource
modules,
options.moduleExtensions || [],
file => file.resource
)
);

output(() => [
'Files to search for used rules:',
filesToSearch.join(', ')
]);
output(() => [
'Files to search for used rules:',
filesToSearch.join(', ')
]);

// Compile through Purify and attach to output.
// This loses sourcemaps should there be any!
compilation.assets[name] = new ConcatSource(
purify(
filesToSearch,
asset.source(),
{
info: options.verbose,
minify: options.minimize,
...options.purifyOptions
}
)
);
});
}
);
// Compile through Purify and attach to output.
// This loses sourcemaps should there be any!
compilation.assets[name] = new ConcatSource(
purify(filesToSearch, asset.source(), {
info: options.verbose,
minify: options.minimize,
...options.purifyOptions
})
);
});
});

cb();
});
});
};
if (compilation.hooks) {
compilation.hooks.additionalAssets('PurifyPlugin', (chunks, cb) =>
additionalAssets(chunks, cb)
);
} else {
compilation.plugin('additional-assets', cb => additionalAssets(cb));
}
};

if (compiler.hooks) {
// Support Webpack 4
compiler.hooks.thisCompilation.tapAsync(
'PurifyPlugin',
thisCompilation
);
} else {
compiler.plugin('this-compilation', thisCompilation);
}
}
};
};