* Create missing directories under the specified base directory, and return the resolved directory. * * Does not support "." or ".." path segments.

* syncNpmrc() copies the .npmrc file to the target folder, and also trims unusable lines from the .npmrc file. * If the source .npmrc file not exist,

* Find the absolute path to the folder containing rush.json

* Get the absolute path to the npm executable

* Removes the following files and directories under the specified folder path: * - installed.flag * - * - node_modules

* As a workaround, copyAndTrimNpmrcFile() copies the .npmrc file to the target folder, and also trims * unusable lines from the .npmrc file. * * Wh

* Get the ".bin" path for the package.

* Run "npm install" in the package install folder.

* Detects if the package in the specified directory is installed

* Parse a package specifier (in the form of name\@version) into name and version parts.

* Resolve a package specifier to a static version

* Write a flag file to the package's install directory, signifying that the install was successful.

* Get additional module paths based on the baseUrl of a compilerOptions object. * * @param {Object} options

* Get jest aliases based on the baseUrl of a compilerOptions object. * * @param {*} options

* Get webpack aliases based on the baseUrl of a compilerOptions object. * * @param {*} options

* This hook is invoked during installation before a package's dependencies * are selected. * The `packageJson` parameter is the deserialized package