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82 lines
3.3 KiB
Markdown
82 lines
3.3 KiB
Markdown
---
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layout: developer-doc
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title: Getting Enso
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category: summary
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tags: [contributing, installation]
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order: 5
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---
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# Getting Enso
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Enso packages are best obtained from the
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[releases](https://github.com/enso-org/enso/releases) page of the repository.
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Each release has an "Assets" section at the bottom. You can click on this to
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view the list of artifacts from which you can download the most appropriate
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version.
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These assets contain bundles that include the Enso launcher, an engine version,
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and GraalVM, allowing you to get up and running immediately. Alternatively, you
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can download just the launcher, which will handle downloading and installing the
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required components for you.
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<!-- MarkdownTOC levels="2,3" autolink="true" -->
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- [Nightly Builds](#nightly-builds)
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- [Dependencies](#dependencies)
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- [Running Enso](#running-enso)
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- [Troubleshooting](#troubleshooting)
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<!-- /MarkdownTOC -->
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## Nightly Builds
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In addition to the official releases, we provide nightly snapshots built on our
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CI. These can be obtained from
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[the build workflow on GitHub Actions](https://github.com/enso-org/enso/actions?query=workflow%3A%22Engine+CI%22+branch%3Amain),
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which should show a list of recent CI builds. The workflow of interest is
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`Engine CI`. You can navigate to the most recent build, which will display a
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list of attached artifacts. The artifact of interest is `enso-engine-<version>`
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(currently `enso-engine-0.2.1-SNAPSHOT`).
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### Dependencies
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The Enso distribution requires to be run with the appropriate version of
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GraalVM. You can get the Community Edition pre-built distributions from
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[the GitHub releases site](https://github.com/graalvm/graalvm-ce-builds/releases).
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It is important to run Enso with exactly the version specified here. Given that
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Graal is still a relatively young project, even the minor version changes
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introduce breaking API changes. The current version of GraalVM required for Enso
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is `20.2.0`, and it must be the Java 11 build.
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Before running the Enso packages, make sure that the `JAVA_HOME` environment
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variable points to the correct home location of the Graal distribution.
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### Running Enso
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The nightly distribution contains the Enso CLI. It allows to create and run Enso
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projects from the command line. To launch the Enso CLI, run the `bin/enso`
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script (Linux and MacOS) or the `bin/enso.bat` script (Windows).
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Again, it is necessary for you to set the `JAVA_HOME` variable correctly.
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### Troubleshooting
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This section lists the most common failures and their probable causes.
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1. The exception
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`java.lang.IllegalArgumentException: Could not find option with name enso-runtime-server.enable.`
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It can contain a different option name. This exception signals problems with
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the Graal distribution. Make sure you're running Enso with the correct
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version of GraalVM. You can verify the version of JDK used by running
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`bin/enso --version`. Take note of the version displayed in the `Running on`
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section. It should be similar to:
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```
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Running on: OpenJDK 64-Bit Server VM, GraalVM Community, JDK 11.0.8+10-jvmci-20.2-b03
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Linux 4.15.0-112-generic (amd64)
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```
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It could also be caused by not using the launcher scripts and trying to run
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the component `.jar` files via `java -jar` without setting the necessary
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options. Use the launcher scripts.
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