This documentation is for an old GraalVM version. See the latest version.

GraalVM Updater

Check Available Components
Install Components
Install Components Manually
Install Components from Local Collection
Uninstall Components
Rebuild Images
Replace Components and Files
Configure Proxies
Configure Installation
GraalVM Updater Commands Overview

GraalVM Updater, gu, is a command-line tool for installing and managing optional GraalVM language runtimes and utilities. It is available in the GraalVM JDK. To assist you with the installation, language runtimes and utilities are pre-packaged as JAR files and referenced in the documentation as “components”. GraalVM Updater can be also used to update your local GraalVM installation to a newer version or upgrade from GraalVM Community Edition to Oracle GraalVM. Read more in Upgrade GraalVM.

Check Available Components #

To check what components are already shipped with your GraalVM installation or what you have already installed, run the list command:

gu list

To check what components are available for your GraalVM version to install, run the gu available command:

gu available
Downloading: Component catalog from ...
ComponentId              Version            Component name                
-----------------------------------------------------------------------------
espresso                 <version>          Java on Truffle               
espresso-llvm            <version>          Java on Truffle LLVM Java library
js                       <version>          JavaScript
llvm                     <version>          LLVM
llvm-toolchain           <version>          LLVM.org toolchain                  
nodejs                   <version>          Graal.nodejs                  
python                   <version>          Graal.Python                  
R                        <version>          FastR                         
ruby                     <version>          TruffleRuby                   
wasm                     <version>          GraalWasm

Note down the ComponentId value for the component you would like to install.

GraalVM Updater verifies whether or not the version of a component is appropriate for your current GraalVM installation. A component may require other components as prerequisites for its operation. GraalVM Updater verifies such requirements and will either attempt to download the required dependencies, or abort the installation if the component’s requirements are not met. Components intended for Oracle GraalVM cannot be installed on GraalVM Community Edition.

Generic support for Node.js, R, Ruby, Python, and WebAssembly will work out of the box in most cases. It is recommended to fine-tune system-dependent configurations, following the recommendations in the component post-installation messages.

Install Components #

You can install a component by component’s ID using GraalVM Updater: gu install ComponentId.

Get a list of components available for your GraalVM version and their descriptive names:
```
 gu available
```
Install a component package using the ComponentId value. For example, js:
```
 gu install js
```
The installation starts, displaying progress.

To see more verbose output during the installation, as the download progress bar, print versions, and dependency information, use the -v (--verbose) switch.

If a component is installed that depends on another component, GraalVM Updater will search for the appropriate dependency and install it as well. If a required component cannot be found, the installation will fail.

Install Components Manually #

You can install a component from a local file, in other words, manually.

Download a component in consideration of the operating system, the Java version, and architecture (if applicable) from:
- Oracle GraalVM Downloads for Oracle GraalVM
- GitHub for GraalVM Community Edition
Having downloaded the appropriate JAR file, install it with this command:
```
 gu -L install component.jar
```
The -L option, equivalent to --local-file or --file, installs a component from a downloaded JAR. However, a component may depend on other components (e.g., Ruby depends on the LLVM toolchain). For example, gu -L install component.jar will fail if the required components are not yet installed. If all dependencies are downloaded into the same directory, you can run:
```
 gu -L install -D
```

Install Components from Local Collection #

Components can be downloaded manually in advance to a local file folder, or to a folder shared on the local network. GraalVM Updater can then use that folder instead of the catalog. Specify the directory to use for the components collection:

gu install -C /path/to/downloads/directory ComponentId

Uninstall Components #

Components may be uninstalled from GraalVM when no longer needed. To uninstall a specific component, use its ComponentId. Run gu list to find out the exact ComponentId.

The command to uninstall the component is:

gu remove ComponentId

If more components end with, for example, ruby, the installer will print an error message that a component’s full name is required (org.graalvm.ruby).

Note that the LLVM toolchain component may fail uninstallation if its dependent component(s) remains installed. In this case, remove the dependent component first, or add the -D option, which would remove dependent components in addition to those explicitly selected:

gu -D remove llvm-toolchain

Rebuild Images #

Language runtime components for GraalVM may change. For example:

polyglot native libraries become out of sync;
removed languages runtimes may cause the native binary to fail on missing resources or libraries.

To rebuild and refresh the native binaries (language launchers), use the following command:

gu rebuild-images [--verbose] polyglot|libpolyglot|js|llvm|python|ruby|R... [custom native-image args]...

Replace Components and Files #

A component may be only installed once. GraalVM Updater refuses to install a component if a component with the same ID is already installed. However, the installed component can be replaced. GraalVM Updater first uninstalls the component, and then installs a new one.

To replace a component, use the -r option and the -L (--local-file or --file) option to treat parameters as the local filename of a packaged component:

gu install -L -r component.jar
gu install -r ruby

The process is the same as if gu remove is run first and gu install next.

GraalVM Updater also refuses to overwrite existing files if the to-be-installed and existing versions differ. There are cases when refreshing file contents may be needed, such as if they were modified or damaged. In this case, use the -o option:

gu install -L -o component.jar
gu install -o ruby

GraalVM Updater will then instruct the user to replace the contained files of a component. By default, it will not alter anything. Alternatively, use the -f (--force) option, which disables most of the checks and allows the user to install non-matching versions.

Configure Proxies #

If GraalVM Updater needs to reach the component catalog, or download a component, it may need to pass through the HTTP/HTTPS proxy, if the network uses one. On macOS, the proxy settings are automatically obtained from the OS. On Linux, ensure that the http_proxy and https_proxy environment variables are set appropriately before launching the gu tool. Refer to the distribution and/or desktop environment documentation for the details.

GraalVM Updater intentionally does not support an option to disable certificate or hostname verification, for security reasons. A user may try to add a proxy’s certificate to the GraalVM default security trust store. You can also download a component manually to a directory, and then run gu -L install /path/to/file to install from a local filesystem (see Install Components Manually).

Working without Internet Access #

If your machine cannot access and download the catalog and components from the Internet, GraalVM Updater can install components from a local directory, or a directory on an accessible network share.

You need to prepare a directory, download all components that you want to install and their dependencies (in case they require other GraalVM components to work) into that directory.

Then you can use gu -L install /path/to/file (where the -L option instructs to use local files, equivalent to --local-file or --file). Adding the -D option will instruct GraalVM Updater to look for potential dependencies in the directory next to the installable file. Additionally, gu -C /path/to/download/dir install component can be used, with the specified directory contents acting as a catalog of components.

Note that with gu -L you need to specify the component’s file name, but when using gu -C <dir>, you need to specify a component ID (ComponentId):

# Specify file location
gu -LD install /tmp/installables/ruby.jar

# Specify component name
gu -C /tmp/instalables install ruby

Configure Installation #

The installation command of GraalVM Updater accepts multiple options and parameters: shell gu install [-0CcDfiLMnosruvyxY] param [param ...]

The following options are currently supported:

-0, --dry-run: dry run, do not change anything
-c, --catalog: treat parameters as component IDs from the GraalVM components catalog. This is the default
-C, --custom-catalog <url>: use a specific catalog URL to locate components
-L, --local-file: treat parameters as local filenames of packaged components
-M: force gu to ignore dependencies of installed components
-f, --force: force overwrite, bypass version checks
-i, --fail-existing: fail on an existing component
-n, --no-progress: do not display the downloading progress
-o, --overwrite: overwrite different files
-r, --replace: replace existing components
-s, --no-verify-jars: skip integrity verification of component archives
-u, --url: interpret parameters as URLs of packaged components
-v, --verbose: be verbose. Prints versions and dependency information
-x, --ignore: ignore failures
-y, --only-validate: do not install, just check compatibility and conflicting files
-Y, --validate-before: download, verify, and check file conflicts before any disk change is made

GraalVM Updater Commands Overview #

Command-line help is available by running gu or gu -h. Run gu <command> -h to get help specific for the particular command. For example, gu install -h.

GraalVM Updater usage options:

gu info [-cClLnprstuvV] <param>: print the information about specific component (from file, URL, or catalog)
gu available [-aClvV] <expr>: list components available in the catalog
gu install [--0CcDfiLMnosruvyxY] <param>: install a component package
gu list [-clv] <expression>: list installed components or components from catalog
gu remove [-0DfMxv] <id>: uninstall a component
gu upgrade [-cCnLsuxSd] [<ver>] [<cmp>]: upgrade to the recent GraalVM version
gu rebuild-images: rebuild the native launchers. Use -h for detailed usage

GraalVM Updater common options:

-A, --auto-yes: say YES or ACCEPT to a question
-c, --catalog: treat parameters as component IDs from the catalog of GraalVM components. This is the default
-C, --custom-catalog <url>: use user-supplied catalog at URL
-e, --debug: enable debugging and print stacktraces
-E, --no-catalog-errors: do not stop if at least one catalog is working
-h, --help: print help
-L, --local-file, --file: treat parameters as local filenames of packaged components
-N, --non-interactive: enable non-interactive mode. Fail when input is required
--show-version: print version information and continue
-u, --url: interpret parameters as URLs of packaged components
-v, --verbose: enable verbose output. Print versions and dependency information
--version: print version

Additonal options:

--email <address>: print an e-mail address used for generating a download token
--config <path>: provide the path to a download token
--show-ee-token: print a saved download token
-k, --public-key <path>: provide path to custom GPG public key for verification
-U, --username <username>: enter a username for login to Oracle component repository

Check the GraalVM’s components availability and support per platform.