这一节跑下一批plugin。
compiler.apply(
new EnsureChunkConditionsPlugin(),
new RemoveParentModulesPlugin(),
new RemoveEmptyChunksPlugin(),
new MergeDuplicateChunksPlugin(),
new FlagIncludedChunksPlugin(),
new OccurrenceOrderPlugin(true),
new FlagDependencyExportsPlugin(),
new FlagDependencyUsagePlugin()
);
希望不要跟上一节一样，全是plugin。
流程如图(看看流程图就行了，后面也没有什么内容)：
EnsureChunkConditionsPlugin
class EnsureChunkConditionsPlugin {
apply(compiler) {
compiler.plugin("compilation", (compilation) => {
const triesMap = new Map();
compilation.plugin(["optimize-chunks-basic", "optimize-extracted-chunks-basic"], (chunks) => { /**/ });
});
}
}
这个看看就懂，不解释了。
RemoveParentModulesPlugin
class RemoveParentModulesPlugin {
apply(compiler) {
compiler.plugin("compilation", (compilation) => {
compilation.plugin(["optimize-chunks-basic", "optimize-extracted-chunks-basic"], (chunks) => { /**/ });
});
}
}
难道又是另一批plugin么……
RemoveEmptyChunksPlugin
class RemoveEmptyChunksPlugin {
apply(compiler) {
compiler.plugin("compilation", (compilation) => {
compilation.plugin(["optimize-chunks-basic", "optimize-extracted-chunks-basic"], (chunks) => { /**/ });
});
}
}
是的。
MergeDuplicateChunksPlugin
class MergeDuplicateChunksPlugin {
apply(compiler) {
compiler.plugin("compilation", (compilation) => {
compilation.plugin("optimize-chunks-basic", (chunks) => { /**/ });
});
}
}
FlagIncludedChunksPlugin
class FlagIncludedChunksPlugin {
apply(compiler) {
compiler.plugin("compilation", (compilation) => {
compilation.plugin("optimize-chunk-ids", (chunks) => { /**/ });
});
}
}
OccurrenceOrderPlugin
class OccurrenceOrderPlugin {
// true
constructor(preferEntry) {
if (preferEntry !== undefined && typeof preferEntry !== "boolean") {
throw new Error("Argument should be a boolean.\nFor more info on this plugin, see https://webpack.js.org/plugins/");
}
this.preferEntry = preferEntry;
}
apply(compiler) {
const preferEntry = this.preferEntry;
compiler.plugin("compilation", (compilation) => {
compilation.plugin("optimize-module-order", (modules) => { /**/ });
compilation.plugin("optimize-chunk-order", (chunks) => { /**/ });
});
}
}
看到那个错误提示就想笑，这个插件除了你自己谁会去调用啊。
FlagDependencyExportsPlugin
class FlagDependencyExportsPlugin {
apply(compiler) {
compiler.plugin("compilation", (compilation) => {
compilation.plugin("finish-modules", (modules) => { /**/ });
function addToSet(a, b) { /**/ }
});
}
}
FlagDependencyUsagePlugin
class FlagDependencyUsagePlugin {
apply(compiler) {
compiler.plugin("compilation", compilation => {
compilation.plugin("optimize-modules-advanced", modules => { /**/ });
function addToSet(a, b) { /**/ }
function isSubset(biggerSet, subset) { /**/ }
});
}
}
总的来说，这一批plugin是针对模块的，不过仍然没有任何实际行为。
还剩下3个也一并过了吧。
TemplatedPathPlugin
class TemplatedPathPlugin {
apply(compiler) {
compiler.plugin("compilation", compilation => {
const mainTemplate = compilation.mainTemplate;
mainTemplate.plugin("asset-path", replacePathVariables);
mainTemplate.plugin("global-hash", function(chunk, paths) { /**/ });
mainTemplate.plugin("hash-for-chunk", function(hash, chunk) { /**/ });
});
}
}
RecordIdsPlugin
class RecordIdsPlugin {
apply(compiler) {
compiler.plugin("compilation", compilation => {
compilation.plugin("record-modules", (modules, records) => { /**/ });
compilation.plugin("revive-modules", (modules, records) => { /**/ });
function getDepBlockIdent(chunk, block) { /**/ }
compilation.plugin("record-chunks", (chunks, records) => { /**/ });
compilation.plugin("revive-chunks", (chunks, records) => { /**/ });
});
}
}
WarnCaseSensitiveModulesPlugin
class WarnCaseSensitiveModulesPlugin {
apply(compiler) {
compiler.plugin("compilation", compilation => {
compilation.plugin("seal", () => { /**/ });
});
}
}
这里把所有compilation事件流触发完后，也只是针对不同的阶段再次进行plugin，所以详细过程还需要继续跑流程。