Create devcontainer shell script

setup_devcontainer.sh

#!/bin/bash
set -e


REPOSITORY_URL="$1"
if [ -z "$REPOSITORY_URL" ]; then
  echo "Error: Repository URL is required"
  echo "Usage: $0 <repository_url>"
  exit 1
fi

PROJECT_NAME=$(basename "$REPOSITORY_URL" .git | cut -d'/' -f2)

# If argument -d thet drop container and volumes
if [ "$2" == "-d" ]; then
  docker stop $PROJECT_NAME-dev
  docker rm $PROJECT_NAME-dev
  docker volume rm $PROJECT_NAME
fi

# Create a named volume
if ! docker volume ls -q | grep -q "^$PROJECT_NAME$"; then
  docker volume create $PROJECT_NAME
fi



# Run a container with git to clone the repository
docker run --rm \
  -v $PROJECT_NAME:/workspace \
  -v $HOME/.ssh:/root/.ssh \
  alpine/git \
  clone "$REPOSITORY_URL" /workspace

# Run nodejs container and mount the docker socket
docker run --rm \
  --name $PROJECT_NAME-builder \
  -v $PROJECT_NAME:/workspace \
  -v /var/run/docker.sock:/var/run/docker.sock \
  docker \
  sh -c "apk update && \
  apk add nodejs npm && \
  npm install -g @devcontainers/cli && \
  devcontainer build --workspace-folder /workspace --image-name $PROJECT_NAME-devcontainer"

# Generate ssh key with "devContainer" name
if [ ! -f ~/.ssh/id_rsa_devcontainer ]; then
  ssh-keygen -t rsa -b 4096 -f ~/.ssh/id_rsa_devcontainer -N "" -C "devContainer"
  # Update SSH config for devcontainer
    SSH_CONFIG="$HOME/.ssh/config"
    CONFIG_BLOCK="# Devcontainer Start
  Host github-developer
      HostName localhost:2222
      User developer
      IdentityFile ~/.ssh/id_rsa_devcontainer
      IdentitiesOnly yes
  # Devcontainer End"

    # Check if the config block already exists
    if ! grep -q "# Devcontainer Start" "$SSH_CONFIG" 2>/dev/null; then
      echo "Adding devcontainer SSH config to ~/.ssh/config"
      echo "" >> "$SSH_CONFIG"
      echo "$CONFIG_BLOCK" >> "$SSH_CONFIG"
    else
      echo "Devcontainer SSH config already exists in ~/.ssh/config"
    fi
fi

# Run devcontainer container and mount the docker socket
# Check if container already exists and is running
if docker ps -q -f name="$PROJECT_NAME-dev" | grep -q .; then
  echo "Container $PROJECT_NAME-dev is already running"
elif docker ps -aq -f name="$PROJECT_NAME-dev" | grep -q .; then
  echo "Starting existing container $PROJECT_NAME-dev"
  docker start $PROJECT_NAME-dev
else
  echo "Creating new container $PROJECT_NAME-dev"
  docker run -d \
    --name $PROJECT_NAME-dev \
    -v $PROJECT_NAME:/workspace \
    -v /var/run/docker.sock:/var/run/docker.sock \
    -v ~/.ssh/id_rsa_devcontainer.pub:/tmp/id_rsa_devcontainer.pub:ro \
    -p 2222:22 \
    -w /workspace \
    -e HOME=/workspace \
    $PROJECT_NAME-devcontainer \
    sh -c "apt-get update && \
      apt-get install -y openssh-server && \
      useradd -m -s /bin/bash developer && \
      mkdir -p /home/developer/.ssh && \
      cat /tmp/id_rsa_devcontainer.pub >> /home/developer/.ssh/authorized_keys && \
      chown -R developer:developer /home/developer/.ssh && \
      chmod 700 /home/developer/.ssh && \
      chmod 600 /home/developer/.ssh/authorized_keys && \
      mkdir /var/run/sshd && \
      sed -i 's/#PermitRootLogin prohibit-password/PermitRootLogin no/' /etc/ssh/sshd_config && \
      sed -i 's/#PubkeyAuthentication yes/PubkeyAuthentication yes/' /etc/ssh/sshd_config && \
      sed -i 's/#PasswordAuthentication yes/PasswordAuthentication no/' /etc/ssh/sshd_config && \
      /usr/sbin/sshd -D"
fi

# Wait for SSH service to be ready
echo "Waiting for SSH service to be ready..."
while ! nc -z localhost 2222; do
  echo "SSH service not ready yet, waiting 2 seconds..."
  sleep 2
done
echo "SSH service is ready!"

# Add SSH fingerprint for localhost:2222
echo "Removing old SSH host key for localhost:2222 to prevent host key verification errors..."
ssh-keygen -R "[localhost]:2222" 2>/dev/null || true
echo "Adding SSH fingerprint for localhost:2222..."
ssh-keyscan -p 2222 localhost >> ~/.ssh/known_hosts 2>/dev/null || true

Devcontainer Start

Host devcontainer
HostName localhost
Port 2222
User developer
IdentityFile ~/.ssh/id_rsa_devcontainer
IdentitiesOnly yes