R compile-Server

Setup (development)

From dev container

To quickly get started with development, you can use the project's Dev Container. We strongly recommend using IntelliJ.

To run the IntelliJ inside the dev container:

• Install Docker
• Install Jetbrains Gateway
• Launch JetBrains Gateway and select "Create Dev Container", set "Git Repository" to "https://github.com/PRL-PRG/r-compile-server.git" or "git@github.com/PRL-PRG/r-compiler-server.git", then click "Build Container and Continue".
  • The process is also described at https://www.jetbrains.com/help/idea/connect-to-devcontainer.html#start_from_gateway.
• If everything works, the dev container should build and you can click "Continue" to launch the project. If not, see troubleshooting.

Manually

If the dev container is too slow, you can also setup on the host machine. To do so, must install the following dependencies:

• Java 22 and Maven 3
  • IntelliJ will automatically install these. If not, you can download a Java 22 binary from https://adoptium.net/temurin/releases/?version=22, and Maven from https://maven.apache.org/download.cgi.
  • If you are using IntelliJ, navigate to "Project Structure > Project" and make sure the *SDK is set to a JDK of version 22 (e.g. "openjdk-22"). If not, click the dropdown and "Download JDK", then select any JDK of version 22.
• GNU-R 4.3.2: https://cloud.r-project.org/src/base/R-4/R-4.3.2.tar.gz
  • It has to be exactly 4.3.2 in order for bytecode tests to pass, because they check against precompiled bytecode.

Commands

• Run make setup to install Git Hooks. The commit hook formats, the pre-push hook runs tests and static analyses.
• Build with make or mvn package
• Test (no static analyses) with make test or mvn test
• Test and static anaylses with make check or mvn verify
• Format with make format or mvn spotless:apply. This requires to have npm installed.

Troubleshooting

• Problem: In Maven, Could not find or initialize a local git repository. A repository is required
  • This happens if you downloaded a ZIP instead of git clone-ing. The solution is to run git init. Note that you won't be able to push changes or create a PR since it's not a proper git repo.
• Problem: In Maven, Fatal error compiling: invalid target release: 22
  • Solution: ensure you have a Java 22 JDK installed, then run JAVA_HOME=<path to JDK 22> mvn …
  • e.g. if using IntelliJ on macOS, openJDK 22, set JAVA_HOME=~/Library/Java/JavaVirtualMachines/openjdk-22/Contents/Home
  • In the devcontainer, JAVA_HOME=/usr/lib/jvm/jdk

If you have a different issue than the above, report it on GitHub.

Development Notes

In this project, all values are considered non-null unless specified as @Nullable.

To enforce this, every package must have a package-info.json with the following code:

@ParametersAreNonnullByDefault
@FieldsAreNonNullByDefault
@ReturnTypesAreNonNullByDefault
package org.prlprg.<package-name>;

import org.prlprg.util.FieldsAreNonNullByDefault;
import org.prlprg.util.ReturnTypesAreNonNullByDefault;

import javax.annotation.ParametersAreNonnullByDefault;

In IntelliJ you can simply copy package-info.json from any package into the new one and it will automatically change the package path.