protected addFile()

in app/exec/extension/_lib/manifest.ts [227:313]
68 lines of code
24 McCabe index (conditional complexity)

	protected addFile(file: FileDeclaration, defer: boolean = false) {
		if (defer) {
			this.deferredFiles.push(file);
			return file;
		}
		if (!file.partName && file.packagePath) {
			file.partName = file.packagePath;
		}

		if (_.isArray(file.partName)) {
			let lastAdd = null;
			for (let i = 0; i < file.partName.length; ++i) {
				const newFile = { ...file };
				newFile.partName = file.partName[i];
				lastAdd = this.addFile(newFile);
			}
			return lastAdd;
		}

		if (typeof file.assetType === "string") {
			file.assetType = [<string>file.assetType];
		}

		file.path = cleanAssetPath(file.path, this.extRoot);
		if (!file.partName) {
			file.partName = "/" + path.relative(this.extRoot, file.path);
		}
		if (!file.partName) {
			throw new Error("Every file must have a path specified name.");
		}

		file.partName = forwardSlashesPath(file.partName);

		// Default the assetType to the partName.
		if (file.addressable && !file.assetType) {
			file.assetType = [toZipItemName(file.partName)];
		}

		if (this.packageFiles[file.path]) {
			if (_.isArray(this.packageFiles[file.path].assetType) && file.assetType) {
				file.assetType = (<string[]>this.packageFiles[file.path].assetType).concat(<string[]>file.assetType);
				this.packageFiles[file.path].assetType = file.assetType;
			}
		}

		// Files added recursively, i.e. from a directory, get lower
		// priority than those specified explicitly. Therefore, if
		// the file has already been added to the package list, don't
		// re-add (overwrite) with this file if it is an auto (from a dir)
		if (file.auto && this.packageFiles[file.path] && this.packageFiles[file.path].partName === file.partName) {
			// Don't add files discovered via directory if they've already
			// been added.
		} else {
			let existPartName = this.lcPartNames[file.partName.toLowerCase()];
			if (!existPartName || file.partName === existPartName) {
				// key off a guid if there is no file path.
				const key = file.path || common.newGuid();
				if (this.packageFiles[key]) {
					// Additional package paths is an UNSUPPORTED and UNDOCUMENTED feature.
					// It may trample on other existing files with no warning or error.
					// Use at your own risk.
					const additionalPackagePaths = (this.packageFiles[key] as any)._additionalPackagePaths;
					if (additionalPackagePaths) {
						additionalPackagePaths.push(file.partName);
					} else {
						(this.packageFiles[key] as any)._additionalPackagePaths = [file.partName];
					}
				} else {
					this.packageFiles[key] = file;
					this.lcPartNames[file.partName.toLowerCase()] = file.partName;
				}
			} else {
				throw new Error(
					"All files in the package must have a case-insensitive unique filename. Trying to add " +
						file.partName +
						", but " +
						existPartName +
						" was already added to the package.",
				);
			}
		}
		if (file.contentType && this.packageFiles[file.path]) {
			this.packageFiles[file.path].contentType = file.contentType;
		}

		return file;
	}