# supi [](https://travis-ci.org/pnpm/supi "See test builds") [](https://ci.appveyor.com/project/zkochan/supi/branch/master) > Fast, disk space efficient installation engine. Used by [pnpm](https://github.com/pnpm/pnpm) ## Install Install it via npm. ``` npm install supi ``` It also depends on `@pnpm/logger` version `1`, so install it as well via: ``` npm install @pnpm/logger@1 ``` ## API ### `supi.installPkgs(pkgsToInstall, [options])` Install packages. **Arguments:** * `pkgsToInstall` - *Object | String[]* - either an object that maps package names to version ranges or inputs usually passed to `npm install` (e.g., `foo@1.0.0`, `foo`). * `options.storeController` - *Object* - required. An object that does all the manipulations with the store. * `options.store` - *String* - required. Location of the store. * `options.saveProd` - *Boolean* - package will appear in `dependencies`. * `options.saveDev` - *Boolean* - package will appear in `devDependencies`. * `options.saveOptional` - *Boolean* - package will appear in `optionalDependencies`. * `options.saveExact` - *Boolean* - saved dependencies will be configured with an exact version rather than using npm's default semver range operator. * `options.global` - *Boolean* - the packages will be installed globally rather than locally. * `options.prefix` - *String* - the directory in which the installation will be performed. By default the `process.cwd()` value is used. * `options.reporter` - *Function* - A function that listens for logs. * `options.packageManager` - *Object* - The `package.json` of the package manager. * `options.hooks` - *Object* - A property that contains installation hooks. Hooks are [documented separately](#hooks). * `options.shrinkwrapOnly` - *Boolean* - `false` by default. When `true`, only updates `shrinkwrap.yaml` and `package.json` instead of checking `node_modules` and downloading dependencies. **Returns:** a Promise **Example:** ```js const pnpm = require('pnpm') pnpm.installPkgs({ 'is-positive': '1.0.0', 'hello-world': '^2.3.1' }, { saveDev: true }) ``` ### `supi.install([options])` Install all modules listed as dependencies in `package.json`. **Arguments:** (same as in named install and additionally) * `options.production` - *Boolean* - `true` by default. If `true`, packages listed in `dependencies` will be installed. * `options.development` - *Boolean* - `true` by default. If `true`, packages listed in `devDependencies` will be installed. * `options.optional` - *Boolean* - Has the value of `options.production` by default. If `true`, packages listed in `optionalDependencies` will be installed. Can be `true` only when `options.production` is `true` as well. ### `supi.uninstall(pkgsToUninstall, [options])` Uninstalls a package, completely removing everything pnpm installed on its behalf. **Arguments:** * `pkgsToUninstall` - *String[]* - the package names to be uninstalled. * `options.saveProd` - *Boolean* - the package will be removed from `dependencies`. * `options.saveDev` - *Boolean* - the package will be removed from `devDependencies`. * `options.saveOptional` - *Boolean* - the package will be removed from `optionalDependencies`. * `options.global` - *Boolean* - the packages will be uninstalled globally. * `options.reporter` - *Function* - A function that listens for logs. ### `supi.link(linkFrom, lintTo, [options])` Create a symbolic link from the linked package to the target package's `node_modules` (and its `node_modules/.bin`). **Arguments:** * `linkFrom` - *String* - path to the package that should be linked. * `lintTo` - *String* - path to the dependent package. * `options.reporter` - *Function* - A function that listens for logs. ### `supi.linkToGlobal(linkFrom, options)` Create a symbolic link from the specified package to the global `node_modules`. **Arguments:** * `linkFrom` - *String* - path to the package that should be linked. * `globalPrefix` - *String* - path to the global directory. * `options.reporter` - *Function* - A function that listens for logs. ### `supi.linkFromGlobal(pkgName, linkTo, options)` Create a symbolic link from the global `pkgName` to the `linkTo/node_modules` folder. **Arguments:** * `pkgName` - *String* - package to link. * `linkTo` - *String* - package to link to. * `globalPrefix` - *String* - path to the global directory. * `options.reporter` - *Function* - A function that listens for logs. ### `supi.unlink([options])` Unlinks all packages that were linked during development in a project. If the linked package is in `package.json` of the project, it is installed after unlinking. **Arguments:** * `options.prefix` - *String* - by default `process.cwd()`. Path to the project. * `options.reporter` - *Function* - A function that listens for logs. ### `supi.unlinkPkgs(pkgsToUnlink, [options])` Unlinks the listed packages that were linked during development in a project. If the linked package is in `package.json` of the project, it is installed after unlinking. **Arguments:** * `pkgsToUnlink` - *String[]* - the list of packages that have to be unlinked. If the passed in package is not an external link, then a warning is reported. * `options.prefix` - *String* - by default `process.cwd()`. Path to the project. * `options.reporter` - *Function* - A function that listens for logs. ### `supi.prune([options])` Remove extraneous packages. Extraneous packages are packages that are not listed on the parent package's dependencies list. **Arguments:** * `options.production` - *Boolean* - by default `false`. If this property is `true`, prune will remove the packages specified in `devDependencies`. * `options.prefix` - *String* - by default `process.cwd()`. * `options.reporter` - *Function* - A function that listens for logs. ### `supi.storeStatus([options])` Return the list of modified dependencies. **Arguments:** * `options.reporter` - *Function* - A function that listens for logs. **Returns:** `Promise` - the paths to the modified packages of the current project. The paths contain the location of packages in the store, not in the projects `node_modules` folder. ### `supi.storePrune([options])` Remove unreferenced packages from the store. ## Hooks Hooks are functions that can step into the installation process. ### `readPackage(pkg)` This hook is called with every dependency's manifest information. The modified manifest returned by this hook is then used by supi during installation. **Example:** ```js const supi = require('supi') supi.installPkgs({ hooks: {readPackage} }) function readPackage (pkg) { if (pkg.name === 'foo') { pkg.dependencies = { bar: '^2.0.0', } } return pkg } ``` ## Acknowledgements Thanks to [Valentina Kozlova](https://github.com/ValentinaKozlova) for the supi logo ## License [MIT](LICENSE)