doomemacs/modules/lang/scala

lang/scala

• Description
  • Module Flags
• +lsp Integration
  • Prerequisites
    • Coursier
      • Ubuntu / Debian / Fedora
      • MacOS
      • Arch
    • Metals
      • Ubuntu / Debian / Fedora / MacOS
      • Arch
  • Features
  • Notes

Description

This module adds scala and sbt support to Doom Emacs.

Module Flags

• +lsp Enables integration for the metals LSP server.

+lsp Integration

Prerequisites

Coursier

Note: Coursier is only required to install Metals. If system is running arch linux this step can be safely skipped.

Ubuntu / Debian / Fedora

curl -fLo cs https://git.io/coursier-cli-linux &&
    chmod +x cs &&
    ./cs

MacOS

curl -fLo cs https://git.io/coursier-cli-macos &&
    chmod +x cs &&
    (xattr -d com.apple.quarantine cs || true) &&
    ./cs

Arch

yay -S coursier

Metals

Ubuntu / Debian / Fedora / MacOS

Note: Update following command to latest version of metals found here.

coursier bootstrap \
  --java-opt -Xss4m \
  --java-opt -Xms100m \
  --java-opt -Dmetals.client=emacs \
  org.scalameta:metals_2.12:0.9.4 \
  -r bintray:scalacenter/releases \
  -r sonatype:snapshots \
  -o /usr/local/bin/metals-emacs -f

Arch

yay -S metals

Features

According to https://scalameta.org/metals/docs/editors/overview.html it adds

• Goto Definition
• Completions
• Hover
• Paremeter Hints
• Find References
• Run/Debug
• Find Implementations
• Rename Symbol
• Code Actions
• Document Symbols
• Formatting
• Folding
• Organize Imports

Notes

• Projects are required to have scala version 2.11.12, 2.12.8, 2.13.0 or greater.
• Latest version of sbt is recommended.
• Running M-x lsp-metals-doctor-run helps diagnose problems.
• Full reference here: https://scalameta.org/metals/docs/editors/emacs.html