ludic/tools/editors/jetbrains/README.md
Orkuncakilkaya 985f9ad8f2 Baseline: Ludic compiler + toolchain, Phase 1 syntax fixes complete
Self-hosted compiler (selfhost/*.ludic), runtime, examples, editor tooling,
and docs. Phase 1 of the syntax-redesign cohesion pass has landed:
edge-system fix, signature-query, when-alias, and the documentation truth-pass.
Suite green (14/14), C-free bootstrap fixpoint holds.

Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>
2026-08-27 15:15:35 +03:00

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Ludic for JetBrains IDEs

Works in IntelliJ IDEA (Community and Ultimate), CLion, GoLand, PyCharm, Rider, WebStorm — anything on the IntelliJ Platform 2023.2 through 2026.2 (since-build 232, until-build 262.*).

until-build 262 is deliberately ahead of the newest released platform — 2025.3 is build 253, and no 262 IDE exists yet. That headroom is the point: an until-build pinned to today's IDE gets the plugin auto-disabled the moment a user upgrades.

Two things are machine-checked rather than assumed, because a plugin that packages cleanly can still fail to load:

  • ./gradlew verifyPlugin runs JetBrains' own Plugin Verifier over the built artifact against 2025.3 and reports Compatible, with no deprecated or scheduled-for-removal API usages.
  • ./gradlew runIde boots a real IDEA 2025.3 with the plugin installed. The sandbox log line to look for is Loaded custom plugins: LSP4IJ (0.20.1), Ludic (1.0.0) in .intellijPlatform/sandbox/Ludic/IC-2025.3/log/idea.log.

If the plugin does not appear in Settings -> Plugins after installing, the cause is almost always that the IDE's build number is outside since-build..until-build. IntelliJ installs the declared dependency (LSP4IJ) from Marketplace first and only then rejects the incompatible plugin, so the symptom is "LSP4IJ got installed, mine did not". Check Help -> About for the build number and widen pluginUntilBuild in gradle.properties to match.

Building

Gradle must run on JDK 17–21. A newer JDK fails with a bare version number as the error message, which is not obvious the first time you see it:

export JAVA_HOME=$(/usr/libexec/java_home -v 21)     # macOS
cd tools/editors/jetbrains
./gradlew buildPlugin        # -> build/distributions/Ludic-1.0.0.zip
./gradlew runIde             # try it in a sandbox IDE

The first build downloads an IntelliJ IDEA Community distribution (over 1 GB), so expect it to take a while; later builds take seconds. Once the cache is warm,

LUDIC_TEST_JETBRAINS=1 ./tools/test-tools.sh

includes the plugin build in the toolchain's own test run.

Install the zip with Settings -> Plugins -> ⚙ -> Install Plugin from Disk. LSP4IJ is a required dependency; the IDE offers to install it for you.

Settings

Settings -> Languages & Frameworks -> Ludic — the path to ludic-lsp and to ludicc. Both default to build/ under the project root, which is where tools/build-tools.sh puts them.