Prerequisite.sh

# Java (Metals requires JDK 11 or 17, prefer 17)
sudo apt update
sudo apt install -y openjdk-17-jdk curl wget git

# Verify
java -version   # should show 17.x

# coursier (the Scala installer/launcher - used to install Metals)
curl -fL "https://github.com/coursier/launchers/raw/master/cs-x86_64-pc-linux.gz" | gzip -d > ~/.local/bin/cs
chmod +x ~/.local/bin/cs

# Make sure ~/.local/bin is in your PATH
echo 'export PATH="$HOME/.local/bin:$PATH"' >> ~/.bashrc
source ~/.bashrc

# Bootstrap coursier itself
cs setup --yes

# After cs setup, your PATH will include ~/.local/share/coursier/bin
# Source again or open a new terminal
source ~/.bashrc

# Verify coursier
cs version

# Install sbt (build tool)
sudo apt install -y apt-transport-https
echo "deb https://repo.scala-sbt.org/scalasbt/debian all main" | sudo tee /etc/apt/sources.list.d/sbt.list
curl -sL "https://keyserver.ubuntu.com/pks/lookup?op=get&search=0x2EE0EA64E40A89B84B2DF73499E82A75642AC823" | sudo apt-key add
sudo apt update
sudo apt install -y sbt

# Verify sbt
sbt --version

# scalafmt standalone (optional, Metals manages its own but handy to have)
cs install scalafmt