helix jvm config post

Author: doneill

source/_posts/helix-jvm-setup.md

@@ -0,0 +1,145 @@
+---
+title: Helix JVM language setup
+date: 2025-01-06 20:20:25
+tags:
+- jvm
+- kotlin
+- scala
+- helix
+---
+
+I have been a huge [helix](https://helix-editor.com/) fan for some time now.  It is my daily coding driver for most languages and environments. Helix support many languages and [language servers](https://docs.helix-editor.com/lang-support.html) out of the box and are easy to configure. In this post I'll step through basic configuration to work with Java and Kotlin in Helix.
+
+**Java Development**
+
+Install Prerequisites
+
+- JDK (Java Developer Kit) on your system
+- Install `jdtls` (Eclipse JDT Language Server) for Java language support
+ 
+```
+# Install Java first if you haven't
+brew install openjdk@21
+
+# Install Maven (needed for some JDTLS features)
+brew install maven
+
+# Install jdtls
+brew install jdtls
+
+# Create Configuration Directory
+mkdir -p ~/.config/jdtls
+mkdir -p ~/.cache/jdtls/workspace
+
+# Test if JDTLS works
+jdtls --version
+```
+
+- Configure Helix language support, add to **~/.config/helix/languages.toml**
+
+```
+[language-server.jdtls]
+command = "jdtls"
+args = ["-data", "~/.cache/jdtls/workspace"]
+
+[[language]]
+name = "java"
+scope = "source.java"
+file-types = ["java"]
+roots = ["pom.xml", "build.gradle", ".git"]
+language-servers = ["jdtls"]  
+```
+**Kotlin Development**
+
+Install Prerequisites
+
+- Install Kotlin
+- Install Kotlin Language Server
+
+```
+brew install kotlin
+brew install kotlin-language-server
+```
+
+- Configure Helix language support, add to **~/.config/helix/languages.toml**
+
+```
+[language-server.kotlin]
+command = "kotlin-language-server"
+
+[[language]]
+name = "kotlin"
+scope = "source.kotlin"
+injection-regex = "kotlin"
+file-types = ["kt", "kts"]
+shebangs = ["kotlin"]
+roots = ["settings.gradle", "settings.gradle.kts", "build.gradle", "build.gradle.kts"]
+comment-token = "//"
+language-servers = ["kotlin-language-server"]
+indent = { tab-width = 4, unit = "    " }  
+```
+
+**BONUS Scala Development**
+
+Install Prerequisites
+
+```
+# For macOS
+brew install scala
+brew install coursier/formulas/coursier
+brew install metals  
+
+cs setup
+cs install metals
+```
+- Configure Helix language support, add to **~/.config/helix/languages.toml**
+
+```
+[language-server.metals]
+command = "metals"
+args = []
+
+[[language]]
+name = "scala"
+scope = "source.scala"
+file-types = ["scala", "sbt", "sc"]
+roots = ["build.sbt", "build.sc"]
+language-servers = ["metals"]
+indent = { tab-width = 2, unit = "  " }  
+```
+
+**Helix Health Report**
+
+```
+❯ hx --health java
+Configured language servers:
+  ✓ jdtls: /opt/homebrew/bin/jdtls
+Configured debug adapter: None
+Configured formatter: None
+Tree-sitter parser: ✓
+Highlight queries: ✓
+Textobject queries: ✓
+Indent queries: ✓
+
+❯ hx --health kotlin
+Configured language servers:
+  ✓ kotlin-language-server: /opt/homebrew/bin/kotlin-language-server
+Configured debug adapter: None
+Configured formatter: None
+Tree-sitter parser: ✓
+Highlight queries: ✓
+Textobject queries: ✘
+Indent queries: ✘
+
+❯ hx --health scala
+Configured language servers:
+  ✓ metals: /opt/homebrew/bin/metals
+Configured debug adapter: None
+Configured formatter: None
+Tree-sitter parser: ✓
+Highlight queries: ✓
+Textobject queries: ✓
+Indent queries: ✓
+```
+
+Debugging support we will leave for a follow up post.