Package com.vaadin.flow.server.frontend

Class FrontendTools

java.lang.Object
com.vaadin.flow.server.frontend.FrontendTools
public class FrontendTools extends Object
Provides access to frontend tools (Node.js and npm, pnpm, bun) and optionally installs the tools if needed.

WARNING: This class is intended for internal usage only. May be renamed or removed in a future release.

Author:
Vaadin Ltd

  • Field Details

    • DEFAULT_NODE_VERSION

      public static final String DEFAULT_NODE_VERSION
      This is the version that is installed if there is no node installed or the installed version is older than SUPPORTED_NODE_VERSION, i.e. 24.0.
      See Also:

    • DEFAULT_NPM_VERSION

      public static final String DEFAULT_NPM_VERSION
      This is the version shipped with the default Node version.
      See Also:

    • DEFAULT_PNPM_VERSION

      public static final String DEFAULT_PNPM_VERSION
      See Also:

    • INSTALL_NODE_LOCALLY

      public static final String INSTALL_NODE_LOCALLY
      See Also:

    • NPM_BIN_PATH

      public static final String NPM_BIN_PATH

  • Constructor Details

    • FrontendTools

      public FrontendTools(FrontendToolsSettings settings)
      Creates an instance of the class using the baseDir as a base directory to locate the tools and the directory returned by the alternativeDirGetter as a directory to install tools if they are not found and use it as an alternative tools location.

      If alternativeDir is null tools won't be installed.

      Note: settings for this object can not be changed through the settings object after creation.

      Parameters:
      settings - tooling settings to use

    • FrontendTools

      public FrontendTools(ApplicationConfiguration applicationConfiguration, File projectRoot)
      Creates an instance using the the given project directory and application configuration.
      Parameters:
      applicationConfiguration - the configuration for the application
      projectRoot - the project root directory

    • FrontendTools

      @Deprecated public FrontendTools(String baseDir, Supplier<String> alternativeDirGetter, String nodeVersion, URI nodeDownloadRoot, boolean forceAlternativeNode, boolean useGlobalPnpm, boolean autoUpdate)
      Deprecated.
      use FrontendTools(FrontendToolsSettings) instead, as it simplifies configuring the frontend tools and gives the default values to configuration parameters.
      Creates an instance of the class using the baseDir as a base directory to locate the tools and the directory returned by the alternativeDirGetter as a directory to install tools if they are not found and use it as an alternative tools location.

      If alternativeDir is null tools won't be installed.

      Parameters:
      baseDir - the base directory to locate the tools, not null
      alternativeDirGetter - the getter for a directory where tools will be installed if they are not found globally or in the baseDir, may be null
      nodeVersion - The Node.js version to be used when Node.js is installed automatically by Vaadin, for example "v16.0.0". Use "v24.10.0" by default.
      nodeDownloadRoot - Download Node.js from this URL. Handy in heavily firewalled corporate environments where the Node.js download can be provided from an intranet mirror. Use NodeInstaller.DEFAULT_NODEJS_DOWNLOAD_ROOT by default.
      forceAlternativeNode - force usage of node executable from alternative directory
      useGlobalPnpm - use globally installed pnpm instead of the default one (see DEFAULT_PNPM_VERSION)
      autoUpdate - update node in alternativeDirGetter if version older than the current default "v24.10.0"

  • Method Details

    • getNodeExecutable

      public String getNodeExecutable()
      Locate node executable.
      Returns:
      the full path to the executable

    • forceAlternativeNodeExecutable

      public String forceAlternativeNodeExecutable()
      Locate node executable from the alternative directory given.

      The difference between getNodeExecutable() and this method in a search algorithm: getNodeExecutable() first searches executable in the base/alternative directory and fallbacks to the globally installed if it's not found there. The forceAlternativeNodeExecutable() doesn't search for globally installed executable. It tries to find it in the installation directory and if it's not found it downloads and installs it there.

      Returns:
      the full path to the executable
      See Also:

    • getNpmExecutable

      public List<String> getNpmExecutable()
      Locate npm executable.
      Returns:
      the list of all commands in sequence that need to be executed to have npm running

    • getPnpmExecutable

      public List<String> getPnpmExecutable()
      Locate pnpm executable.

      In case pnpm is not available it will be installed.

      Returns:
      the list of all commands in sequence that need to be executed to have pnpm running

    • getBunExecutable

      public List<String> getBunExecutable()
      Locate bun executable.
      Returns:
      the list of all commands in sequence that need to be executed to have bun running

    • validateNodeAndNpmVersion

      public void validateNodeAndNpmVersion()
      Validate that the found node and npm versions are new enough. Throws an exception with a descriptive message if a version is too old.

    • getNodeVersion

      public FrontendVersion getNodeVersion() throws FrontendUtils.UnknownVersionException
      Gets the version of the node executable.
      Returns:
      the version of the node executable
      Throws:
      FrontendUtils.UnknownVersionException - if the node version cannot be determined

    • installNode

      protected String installNode(String nodeVersion, URI downloadRoot)
      Install node and npm.
      Parameters:
      nodeVersion - node version to install
      downloadRoot - optional download root for downloading node. May be a filesystem file or a URL see NodeInstaller.setNodeDownloadRoot(URI).
      Returns:
      node installation path

    • getProxies

      protected List<ProxyConfig.Proxy> getProxies()
      Read list of configured proxies in order from system properties, .npmrc file in the project root folder, .npmrc file in user root folder and system environment variables.
      Returns:
      list of configured proxies

    • getNpmVersion

      public FrontendVersion getNpmVersion() throws FrontendUtils.UnknownVersionException
      Executes npm --version to and parses the result.
      Returns:
      the version of npm.
      Throws:
      FrontendUtils.UnknownVersionException - if the npm command fails or returns unexpected output.

    • getNpmPackageExecutable

      public Path getNpmPackageExecutable(String packageName, String binName, File cwd) throws FrontendUtils.CommandExecutionException
      Gives a path to the executable (bin) JS file of the given package using the native node resolution mechanism.
      Parameters:
      packageName - the name of the package.
      binName - the name of the specific executable.
      cwd - the current working directory.
      Returns:
      the path to the executable.
      Throws:
      FrontendUtils.CommandExecutionException - if the node resolution fails.

    • getWebpackNodeEnvironment

      @Deprecated(forRemoval=true, since="24.8") public Map<String,String> getWebpackNodeEnvironment()
      Deprecated, for removal: This API element is subject to removal in a future version.
      Webpack is not used anymore, this method is obsolete and have no replacements.
      Returns flags required to pass to Node for Webpack to function. Determine whether webpack requires Node.js to be started with the --openssl-legacy-provider parameter. This is a webpack 4 workaround of the issue https://github.com/webpack/webpack/issues/14532 See: https://github.com/vaadin/flow/issues/12649
      Returns:
      the flags

    • getNodeBinary

      public String getNodeBinary()
      Gets a path to the used node binary. The return value can be used when executing node commands, as the first part of a process builder command.
      Returns:
      the path to the node binary