Clean up build system and update documentation
- Updated README.md to reflect current single-stage build architecture - Removed obsolete scripts/build-boot.sh (unused two-stage boot approach) - Updated cleanup.sh to remove reference to non-existent setup-submodules.sh - Documented smart caching and component compilation workflow - Added proper build variants (minimal vs full) documentation
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@@ -1,179 +0,0 @@
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#!/bin/bash
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set -e
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BOOT_ROOT="/build/boot"
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OUTPUT_DIR="/build/output"
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CONFIG_DIR="/build/configs"
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echo "[+] Building minimal boot initramfs..."
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echo " Target: ~10-20MB embedded in kernel"
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echo " Purpose: Boot + network + mount Alpine runtime"
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# Clean and create boot root
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rm -rf "$BOOT_ROOT"
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mkdir -p "$BOOT_ROOT"
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echo "[+] Installing minimal boot packages..."
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# Set up APK for boot root
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mkdir -p "$BOOT_ROOT/etc/apk"
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cp /etc/apk/repositories "$BOOT_ROOT/etc/apk/"
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# Copy APK keys
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if [ -d /etc/apk/keys ]; then
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mkdir -p "$BOOT_ROOT/etc/apk/keys"
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cp /etc/apk/keys/* "$BOOT_ROOT/etc/apk/keys/"
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fi
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# Create APK database
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mkdir -p "$BOOT_ROOT/lib/apk/db"
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mkdir -p "$BOOT_ROOT/var/cache/apk"
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# Install absolute minimal packages
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echo " Installing boot packages from packages-boot.txt..."
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apk --root "$BOOT_ROOT" --clean-protected --update-cache --initdb add alpine-baselayout busybox apk-tools musl
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# Install additional boot packages
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while read -r package; do
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# Skip comments and empty lines
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case "$package" in
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\#*|"") continue ;;
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esac
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echo " Installing: $package"
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if apk --root "$BOOT_ROOT" add --no-cache "$package"; then
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echo " Success: $package"
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else
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echo " Warning: Failed to install $package"
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fi
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done < "$CONFIG_DIR/packages-boot.txt"
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echo "[+] Installing minimal ethernet drivers..."
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# Install essential ethernet firmware and drivers using our minimal script
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INITRAMFS_ROOT="$BOOT_ROOT" /build/scripts/install-firmware-minimal.sh
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echo "[+] Setting up boot filesystem structure..."
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# Create essential directories
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mkdir -p "$BOOT_ROOT"/{dev,proc,sys,mnt,tmp,var/run,var/log}
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mkdir -p "$BOOT_ROOT"/{root,home,opt}
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mkdir -p "$BOOT_ROOT"/mnt/{alpine,debug}
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# Create device nodes
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echo " Creating device nodes..."
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[ ! -e "$BOOT_ROOT/dev/console" ] && mknod "$BOOT_ROOT/dev/console" c 5 1
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[ ! -e "$BOOT_ROOT/dev/null" ] && mknod "$BOOT_ROOT/dev/null" c 1 3
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[ ! -e "$BOOT_ROOT/dev/zero" ] && mknod "$BOOT_ROOT/dev/zero" c 1 5
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# Set proper permissions
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chmod 666 "$BOOT_ROOT/dev/null" "$BOOT_ROOT/dev/zero"
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chmod 600 "$BOOT_ROOT/dev/console"
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echo "[+] Creating boot init script..."
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# Create minimal init script for mounting Alpine runtime
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cat > "$BOOT_ROOT/init" << 'EOF'
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#!/bin/bash
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# Minimal boot init - establish network and mount Alpine runtime
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echo "[BOOT] Zero-OS minimal boot starting..."
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# Mount essential filesystems
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mount -t proc proc /proc
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mount -t sysfs sysfs /sys
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mount -t devtmpfs devtmpfs /dev
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# Load essential modules
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echo "[BOOT] Loading ethernet drivers..."
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modprobe -a e1000 e1000e igb ixgbe r8169 8139too bnx2 tg3 2>/dev/null || true
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# Start eudev for hardware detection
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echo "[BOOT] Starting hardware detection..."
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/sbin/udevd --daemon
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udevadm trigger
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udevadm settle
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# Network configuration
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echo "[BOOT] Configuring network..."
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for iface in $(ls /sys/class/net/ | grep -v lo); do
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echo " Bringing up interface: $iface"
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ip link set "$iface" up
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# Try DHCP with timeout
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timeout 30 dhcpcd "$iface" && break
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done
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# Mount Alpine runtime system
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echo "[BOOT] Mounting Alpine runtime system..."
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# Check for VirtioFS mount (development)
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if [ -d /sys/fs/virtio_fs ]; then
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echo " Attempting VirtioFS mount..."
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mount -t virtiofs alpine-root /mnt/alpine && ALPINE_MOUNTED=true
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fi
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# If VirtioFS failed, try network mount (production)
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if [ "$ALPINE_MOUNTED" != "true" ]; then
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echo " VirtioFS not available, attempting network mount..."
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# Add network mounting logic here (NFS, HTTP, etc.)
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echo " Network mount not implemented yet"
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fi
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# Switch to Alpine runtime if mounted
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if [ "$ALPINE_MOUNTED" = "true" ]; then
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echo "[BOOT] Switching to Alpine runtime system..."
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# Move boot mounts to Alpine
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mount --move /proc /mnt/alpine/proc
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mount --move /sys /mnt/alpine/sys
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mount --move /dev /mnt/alpine/dev
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# Switch root to Alpine
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exec switch_root /mnt/alpine /sbin/zinit
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else
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echo "[BOOT] Failed to mount Alpine runtime - dropping to shell"
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exec /bin/sh
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fi
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EOF
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chmod +x "$BOOT_ROOT/init"
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echo "[+] Setting up symlinks..."
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cd "$BOOT_ROOT"
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# Standard symlinks
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ln -sf usr/lib lib || true
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ln -sf usr/lib lib64 || true
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# Fixed run symlink (not circular)
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mkdir -p run
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cd var
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ln -sf ../run run || true
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cd ..
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echo "[+] Cleaning up boot initramfs..."
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# Remove unnecessary files
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rm -rf var/cache/apk/*
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rm -rf usr/share/doc usr/share/man usr/share/info 2>/dev/null || true
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# Aggressive cleanup for embedded
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find . -name "*.a" -delete 2>/dev/null || true
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find . -name "*.la" -delete 2>/dev/null || true
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echo "[+] Creating boot initramfs archive..."
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cd "$BOOT_ROOT"
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# Create cpio archive
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find . | cpio -H newc -o > "$OUTPUT_DIR/boot-initramfs.cpio"
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if [ -f "$OUTPUT_DIR/boot-initramfs.cpio" ]; then
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size=$(stat -c%s "$OUTPUT_DIR/boot-initramfs.cpio")
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size_mb=$((size / 1024 / 1024))
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echo "[+] Boot initramfs created: $OUTPUT_DIR/boot-initramfs.cpio (${size_mb}MB)"
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else
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echo "[-] Error: Failed to create boot initramfs"
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exit 1
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fi
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echo "[+] Minimal boot initramfs build complete"
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echo " Size: ${size_mb}MB (target: ~10-20MB)"
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echo " Contains: Boot + network + minimal drivers"
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echo " Purpose: Mount and switch to Alpine runtime"
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@@ -176,5 +176,4 @@ echo "[+] Cleanup completed successfully!"
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echo ""
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echo "To rebuild the project after cleanup:"
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echo " 1. Run: ./build.sh # Full rebuild"
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echo " 2. Or: docker-compose up --build # Docker rebuild"
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echo " 3. Or: scripts/setup-submodules.sh # Restore submodules first"
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echo " 2. Or: cd build && docker-compose up --build # Docker rebuild"
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@@ -1,7 +0,0 @@
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#!/bin/bash
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# Ensure all scripts are executable
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chmod +x /build/scripts/*.sh
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echo "Script permissions updated:"
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ls -la /build/scripts/*.sh | grep -E '\.(sh)$'
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