feat: add devcontainer configuration with Nix support (#112)

Change-Id: I9f23638b2c61e90f4c44c7840dcb0ca32cfcdcd3

Signed-off-by: Thomas Kosiewski <[email protected]>

Author: ThomasK33

.devcontainer/Dockerfile

@@ -0,0 +1,33 @@
+FROM mcr.microsoft.com/devcontainers/base:ubuntu
+
+# Install Nix
+RUN apt-get update && apt-get install -y \
+    curl \
+    xz-utils \
+    sudo \
+    && rm -rf /var/lib/apt/lists/*
+
+# Create vscode user if it doesn't exist
+RUN if ! id -u vscode > /dev/null 2>&1; then \
+        useradd -m -s /bin/bash vscode && \
+        echo "vscode ALL=(ALL) NOPASSWD:ALL" >> /etc/sudoers; \
+    fi
+
+# Switch to vscode user for Nix installation
+USER vscode
+WORKDIR /home/vscode
+
+# Install Nix in single-user mode
+RUN curl -L https://nixos.org/nix/install | sh -s -- --no-daemon
+
+# Add Nix to PATH and configure for the shell
+RUN echo '. /home/vscode/.nix-profile/etc/profile.d/nix.sh' >> /home/vscode/.bashrc && \
+    mkdir -p /home/vscode/.config/nix && \
+    echo 'experimental-features = nix-command flakes' >> /home/vscode/.config/nix/nix.conf
+
+# Set up workspace directory
+RUN sudo mkdir -p /workspace && sudo chown vscode:vscode /workspace
+WORKDIR /workspace
+
+# Keep container running
+CMD ["sleep", "infinity"]

.devcontainer/devcontainer.json

@@ -0,0 +1,23 @@
+{
+  "name": "claudecode.nvim Development",
+  "build": {
+    "dockerfile": "Dockerfile"
+  },
+  "features": {
+    "ghcr.io/devcontainers/features/git:1": {}
+  },
+  "customizations": {
+    "vscode": {
+      "settings": {
+        "terminal.integrated.defaultProfile.linux": "bash"
+      },
+      "extensions": ["jnoortheen.nix-ide"]
+    }
+  },
+  "postCreateCommand": "bash .devcontainer/post-create.sh",
+  "remoteUser": "vscode",
+  "mounts": [
+    "source=${localWorkspaceFolder},target=/workspace,type=bind,consistency=cached"
+  ],
+  "workspaceFolder": "/workspace"
+}

.devcontainer/post-create.sh

@@ -0,0 +1,31 @@
+#!/bin/bash
+
+# Source Nix environment
+. /home/vscode/.nix-profile/etc/profile.d/nix.sh
+
+# Verify Nix is available
+if ! command -v nix &>/dev/null; then
+  echo "Error: Nix is not installed properly"
+  exit 1
+fi
+
+echo "✅ Nix is installed and available"
+echo ""
+echo "📦 claudecode.nvim Development Container Ready!"
+echo ""
+echo "To enter the development shell with all dependencies, run:"
+echo "  nix develop"
+echo ""
+echo "This will provide:"
+echo "  - Neovim"
+echo "  - Lua and LuaJIT"
+echo "  - busted (test framework)"
+echo "  - luacheck (linter)"
+echo "  - stylua (formatter)"
+echo "  - All other development tools"
+echo ""
+echo "You can also run development commands directly:"
+echo "  - make        # Run full validation (format, lint, test)"
+echo "  - make test   # Run tests"
+echo "  - make check  # Run linter"
+echo "  - make format # Format code"