slim version

build/Dockerfile

@@ -1,99 +1,30 @@
 FROM ubuntu:latest AS base
 
-# Copy Gradle from gradle:latest
+# 1. Combine updates and system-level tools to save space
+RUN apt-get update && apt-get install -y --no-install-recommends \
+	curl jq git sudo vim wget unzip locales \
+	build-essential libgmp-dev libffi-dev libnuma-dev zlib1g-dev libtinfo-dev \
+	python3 python3-venv python3-tk python-is-python3 \
+	default-jdk \
+	&& rm -rf /var/lib/apt/lists/*
+
+# 2. Setup Locales
+RUN localedef -i en_US -c -f UTF-8 -A /usr/share/locale/locale.alias en_US.UTF-8
+ENV LANG=en_US.utf8
+
+# 3. Copy Gradle (This is fine as is)
 COPY --from=gradle:latest /opt/gradle /opt/gradle
 ENV GRADLE_HOME=/opt/gradle
 ENV PATH="${GRADLE_HOME}/bin:${PATH}"
 
-# Update and install dependencies
-RUN apt-get -y update
-RUN apt-get install -y \
-	curl \
-	jq \
-	git \
-	sudo \
-	vim \
-	wget \
-	unzip \
-	locales
-
-# Sets local
-RUN localedef -i en_US -c -f UTF-8 -A /usr/share/locale/locale.alias en_US.UTF-8
-ENV LANG=en_US.utf8
-
-FROM base AS python-init
-
-# Install Python
-RUN apt-get install -y \
-	python3 \
-	python3-pip \
-	python3-venv \
-	python3-tk \
-	python-is-python3
-
-# Install Python Packages
-RUN pip install \
-	requests \
-	rich \
-	ipykernel \
-	--break-system-packages
-
-FROM python-init AS java-init
-
-# Install JAVA
-RUN apt-get install -y \
-	default-jdk \
-	openjdk-21-source
-
-FROM java-init AS scala
-
-# Install Scala
-ARG SCALA_VERSION="3.7.3"
-ARG URL="https://github.com/scala/scala3/releases/download/${SCALA_VERSION}/scala3-${SCALA_VERSION}.tar.gz"
-ARG SCALA_DIR="/usr/share/scala3-${SCALA_VERSION}"
-RUN curl -fsL --show-error ${URL} | tar xfz - -C /usr/share && \
-	mv ${SCALA_DIR} /usr/share/scala && \
-	chown -R root:root /usr/share/scala && \
-	chmod -R 755 /usr/share/scala && \
-	ln -s /usr/share/scala/bin/* /usr/local/bin
-
-FROM scala AS haskell-init
-
-# Install required C libraries and build tools for Haskell/GHC
-RUN apt-get install -y \
-	build-essential \
-	libgmp-dev \
-	libffi-dev \
-	libnuma-dev \
-	zlib1g-dev \
-	libtinfo-dev
-
-# Install ghcup and Haskell tools globally in /opt
-ENV GHCUP_INSTALL_BASE_PREFIX=/opt
-ENV PATH="/opt/.ghcup/bin:${PATH}"
-
-RUN curl --proto '=https' --tlsv1.2 -sSf https://get-ghcup.haskell.org | \
-	BOOTSTRAP_HASKELL_NONINTERACTIVE=1 \
-	BOOTSTRAP_HASKELL_GHC_VERSION=latest \
-	BOOTSTRAP_HASKELL_CABAL_VERSION=latest \
-	BOOTSTRAP_HASKELL_HLS_VERSION=latest \
-	sh
-
-# Ensure the toolchain is readable and executable by all users
-RUN chmod -R a+rX /opt/.ghcup
-
-FROM haskell-init AS lth
-
-# Clears apt lists
-RUN rm -rf /var/lib/apt/lists/*
-
-# Adds the default User
+# 4. Define the user
 ARG USER=lth-student
 RUN useradd --groups sudo --no-create-home --shell /bin/bash ${USER} \
 	&& echo "${USER} ALL=(ALL) NOPASSWD:ALL" >/etc/sudoers.d/${USER} \
 	&& chmod 0440 /etc/sudoers.d/${USER}
 
-# Sets user and work directory
 USER ${USER}
 WORKDIR /home/${USER}
-ENV PATH="${GRADLE_HOME}/bin:${PATH}"
+
+# Add local bin paths to PATH now so they work once installed in Home
+ENV PATH="/home/${USER}/.ghcup/bin:/home/${USER}/.local/bin:${PATH}"

main.tf

@@ -31,12 +31,29 @@ resource "coder_agent" "main" {
   startup_script = <<-EOT
     set -e
 
-    # Prepare user home with default files on first start.
+    # 1. Standard home init
     if [ ! -f ~/.init_done ]; then
       cp -rT /etc/skel ~
+      
+      # 2. Install GHCup & Haskell
+      curl --proto '=https' --tlsv1.2 -sSf https://get-ghcup.haskell.org | \
+        BOOTSTRAP_HASKELL_NONINTERACTIVE=1 \
+        BOOTSTRAP_HASKELL_GHC_VERSION=latest \
+        BOOTSTRAP_HASKELL_CABAL_VERSION=latest \
+        BOOTSTRAP_HASKELL_HLS_VERSION=latest \
+        sh
+
+      # 3. Install Scala
+      curl -fL https://github.com/coursier/launchers/raw/master/cs-x86_64-pc-linux.gz | gzip -d > cs
+      chmod +x cs
+      ./cs setup --yes
+      rm cs
+
+      # 4. Create Python Venv
+      python3 -m venv ~/.venv
+      
       touch ~/.init_done
     fi
-
   EOT
 
   # These environment variables allow you to make Git commits right away after creating a