Dockerfile.optimized

# Multi-stage LFS Docker build for smaller images
FROM alpine:latest AS builder

# Install necessary tools for processing
RUN apk add --no-cache tar gzip

# Copy LFS source
COPY lfs12/ /lfs-staging/

# Clean up unnecessary files for container use
RUN cd /lfs-staging && \
    # Remove kernel and boot files (not needed in container)
    rm -rf boot/* && \
    # Remove device files (will be created by Docker)
    rm -rf dev/* && \
    # Remove mount points content
    rm -rf proc/* sys/* tmp/* && \
    # Remove lost+found
    rm -rf lost+found && \
    # Create essential directories
    mkdir -p proc sys tmp dev && \
    # Remove some unnecessary sbin tools for containers
    find usr/sbin sbin -name "*mount*" -delete 2>/dev/null || true && \
    find usr/sbin sbin -name "*swap*" -delete 2>/dev/null || true

# Final stage - create the LFS container
FROM scratch

# Copy the cleaned LFS system
COPY --from=builder /lfs-staging/ /

# Set environment variables
ENV PATH="/usr/bin:/bin:/usr/sbin:/sbin:/usr/local/bin:/usr/local/sbin"
ENV TERM=xterm-256color
ENV HOME=/root
ENV USER=root
ENV SHELL=/bin/bash
ENV LC_ALL=C.UTF-8
ENV LANG=C.UTF-8

# Create necessary runtime directories
RUN mkdir -p /tmp /var/tmp /run /var/run

# Set working directory
WORKDIR /root

# Health check
HEALTHCHECK --interval=30s --timeout=3s --start-period=5s --retries=3 \
    CMD /bin/test -f /bin/bash || exit 1

# Add labels
LABEL maintainer="LFS Builder" \
      description="Linux From Scratch 12 Container" \
      version="12.0" \
      size="optimized" \
      architecture="x86_64"

# Default command
CMD ["/bin/bash"]