Drools DRL for Visual Studio Code

VS Code extension providing rich language support for Drools Rule Language (DRL) files, powered by the drools-lsp language server.

Features

Syntax Highlighting -- full TextMate grammar for DRL keywords, rule attributes, annotations, constraint/temporal operators, strings, comments, and $variable bindings
Autocomplete -- context-sensitive completions for DRL keywords, imported types, declared types, global variables, and snippet templates for common structures (rule, query, declare, function)
Diagnostics -- real-time parse error reporting as you type
Go-to-Definition -- Ctrl+click (Cmd+click on macOS) to jump to rule definitions, type declarations, global declarations, function definitions, and import statements
Hover Documentation -- hover over any keyword, rule, type, global, function, or import for Markdown-formatted documentation
Comment Toggling -- Ctrl+/ toggles // line comments
Bracket Matching -- auto-close and matching for {}, [], (), "", ''
Code Folding -- fold rule/query/declare/function blocks

Java 17+ -- the language server runs as a Java process
drools-lsp shaded JAR -- built from the drools-lsp module in the Drools repository

Setting	Type	Default	Description
`drools.lsp.serverPath`	`string`	`""`	Absolute path to the `drools-lsp` shaded JAR. If empty, the extension searches its own `server/` directory for a JAR matching `drools-lspshaded.jar`.
`drools.lsp.javaHome`	`string`	`""`	Path to a Java 17+ installation directory. If empty, the extension uses `JAVA_HOME` or falls back to `java` on PATH.

The extension registers the .drl file extension as language ID drl. Files are automatically recognized when opened.