Method build

lib/ExternalModule.js:905–979

* Builds the module using the provided compilation context. * @param {WebpackOptions} options webpack options * @param {Compilation} compilation the compilation * @param {ResolverWithOptions} resolver the resolver * @param {InputFileSystem} fs the file system * @param {BuildCallback} callb

(options, compilation, resolver, fs, callback)

	 * @returns {void}
	 */
	build(options, compilation, resolver, fs, callback) {
		this.buildMeta = {
			async: false,
			exportsType: undefined
		};
		this.buildInfo = {
			strict: true,
			topLevelDeclarations: new Set(),
			javascriptModule: compilation.outputOptions.module
		};
		const { request, externalType } = this._getRequestAndExternalType();
		this.buildMeta.exportsType = "dynamic";
		let canMangle = false;
		this.clearDependenciesAndBlocks();
		switch (externalType) {
			case "this":
				this.buildInfo.strict = false;
				break;
			case "system":
				if (!Array.isArray(request) || request.length === 1) {
					this.buildMeta.exportsType = "namespace";
					canMangle = true;
				}
				break;
			case "module":
				if (this.buildInfo.javascriptModule) {
					if (!Array.isArray(request) || request.length === 1) {
						this.buildMeta.exportsType = "namespace";
						canMangle = true;
					}
				} else {
					this.buildMeta.async = true;
					EnvironmentNotSupportAsyncWarning.check(
						this,
						compilation.runtimeTemplate,
						"external module"
					);
					if (!Array.isArray(request) || request.length === 1) {
						this.buildMeta.exportsType = "namespace";
						canMangle = false;
					}
				}
				break;
			case "script":
				this.buildMeta.async = true;
				EnvironmentNotSupportAsyncWarning.check(
					this,
					compilation.runtimeTemplate,
					"external script"
				);
				break;
			case "promise":
				this.buildMeta.async = true;
				EnvironmentNotSupportAsyncWarning.check(
					this,
					compilation.runtimeTemplate,
					"external promise"
				);