94 lines
3.3 KiB
Bash
Executable File
94 lines
3.3 KiB
Bash
Executable File
#!/bin/bash
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# ============================================================================
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# DarkForge Linux — Phase 0: Create LFS Build Partition (Loopback)
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# ============================================================================
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# Purpose: Create a loopback ext4 filesystem for the LFS build environment.
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# This avoids repartitioning and uses free space on your root drive.
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# The loopback file acts exactly like a real partition.
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# If a previous build exists, tears it down and starts fresh.
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# Inputs: None (uses defaults below, override via environment)
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# Outputs: 50GB ext4 filesystem mounted at /mnt/darkforge
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# Assumes: Running as root, ~50GB free on root filesystem
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# ============================================================================
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set -euo pipefail
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# --- Configuration -----------------------------------------------------------
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LFS="${LFS:-/mnt/darkforge}"
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LFS_IMAGE="${LFS_IMAGE:-/opt/darkforge.img}"
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LFS_SIZE="${LFS_SIZE:-50G}"
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# Color output
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RED='\033[0;31m'
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GREEN='\033[0;32m'
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YELLOW='\033[1;33m'
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NC='\033[0m'
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ok() { echo -e "${GREEN}>>> $*${NC}"; }
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warn() { echo -e "${YELLOW}>>> $*${NC}"; }
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fail() { echo -e "${RED}>>> $*${NC}"; exit 1; }
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# --- Verify running as root --------------------------------------------------
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[ "$(id -u)" -eq 0 ] || fail "This script must be run as root."
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echo "============================================================"
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echo " DarkForge Linux — LFS Build Partition Setup"
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echo "============================================================"
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echo ""
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echo " Image file: ${LFS_IMAGE}"
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echo " Image size: ${LFS_SIZE}"
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echo " Mount point: ${LFS}"
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echo ""
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# --- Tear down any existing build --------------------------------------------
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if mountpoint -q "${LFS}" 2>/dev/null; then
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warn "Existing build found at ${LFS} — tearing down..."
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umount -l "${LFS}" 2>/dev/null || true
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ok "Unmounted ${LFS}"
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fi
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if [ -f "${LFS_IMAGE}" ]; then
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warn "Removing old image: ${LFS_IMAGE}"
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rm -f "${LFS_IMAGE}"
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ok "Old image removed"
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fi
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# --- Check free space ---------------------------------------------------------
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AVAIL_KB=$(df --output=avail / | tail -1 | tr -d ' ')
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AVAIL_GB=$((AVAIL_KB / 1024 / 1024))
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NEED_GB=$(echo "${LFS_SIZE}" | sed 's/G//')
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if [ "${AVAIL_GB}" -lt "${NEED_GB}" ]; then
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fail "Not enough free space: ${AVAIL_GB}GB available, need ${NEED_GB}GB"
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fi
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ok "Free space check: ${AVAIL_GB}GB available, need ${NEED_GB}GB"
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# --- Create the loopback image -----------------------------------------------
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echo ">>> Creating ${LFS_SIZE} image file..."
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# Use fallocate for instant allocation (no slow dd)
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fallocate -l "${LFS_SIZE}" "${LFS_IMAGE}" || {
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warn "fallocate failed, falling back to truncate..."
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truncate -s "${LFS_SIZE}" "${LFS_IMAGE}"
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}
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ok "Image created: ${LFS_IMAGE}"
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echo ">>> Formatting as ext4..."
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mkfs.ext4 -q -L darkforge "${LFS_IMAGE}"
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ok "Formatted as ext4"
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# --- Mount it -----------------------------------------------------------------
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mkdir -p "${LFS}"
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mount -o loop "${LFS_IMAGE}" "${LFS}"
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ok "Mounted ${LFS_IMAGE} at ${LFS}"
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echo ""
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df -h "${LFS}"
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echo ""
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ok "LFS build partition is ready (fresh start)."
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echo ""
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echo "To remount after reboot:"
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echo " sudo mount -o loop ${LFS_IMAGE} ${LFS}"
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echo ""
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echo "To add to /etc/fstab (auto-mount on boot):"
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echo " ${LFS_IMAGE} ${LFS} ext4 loop 0 0"
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