123 lines
4.5 KiB
Bash
Executable File
123 lines
4.5 KiB
Bash
Executable File
#!/bin/bash
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set -e
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# SeniorNet Kiosk ISO Builder
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# Takes the official Debian Trixie netinstall ISO and repacks it with:
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# - preseed.cfg embedded for silent auto-install
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# - GRUB + isolinux configured for auto-boot (UEFI + BIOS)
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#
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# The kiosk app itself is NOT bundled — it's downloaded from Gitea at
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# first-boot time. Rebuild the ISO only when changing Debian base or preseed.
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#
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# Run: sudo ./build-iso.sh
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# Output: iso-output/seniornet-kiosk.iso
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if [ "$EUID" -ne 0 ]; then
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echo "ERROR: Run as root: sudo ./build-iso.sh"; exit 1
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fi
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REPO_DIR="$(cd "$(dirname "$0")" && pwd)"
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OUTPUT_DIR="$REPO_DIR/iso-output"
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WORK_DIR="$(mktemp -d /tmp/kiosk-iso-XXXX)"
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trap 'rm -rf "$WORK_DIR"' EXIT
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DEBIAN_ISO_URL="https://cdimage.debian.org/cdimage/daily-builds/daily/arch-latest/amd64/iso-cd/debian-testing-amd64-netinst.iso"
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ISO_CACHE="$OUTPUT_DIR/debian-netinst.iso"
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OUTPUT_ISO="$OUTPUT_DIR/seniornet-kiosk.iso"
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mkdir -p "$OUTPUT_DIR"
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# ── Dependencies ───────────────────────────────────────────────────
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echo "==> Checking dependencies..."
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MISSING=""
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for pkg in xorriso isolinux curl; do
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dpkg -l "$pkg" &>/dev/null || MISSING="$MISSING $pkg"
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done
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if [ -n "$MISSING" ]; then
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apt-get install -y $MISSING
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fi
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# ── Download Debian netinstall ISO (cached) ────────────────────────
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if [ -f "$ISO_CACHE" ]; then
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echo "==> Using cached Debian ISO: $ISO_CACHE"
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else
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echo "==> Downloading Debian Trixie netinstall (~700 MB)..."
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curl -L --progress-bar "$DEBIAN_ISO_URL" -o "$ISO_CACHE"
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fi
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# ── Extract ISO ────────────────────────────────────────────────────
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echo "==> Extracting ISO..."
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mkdir -p "$WORK_DIR/iso"
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xorriso -osirrox on -indev "$ISO_CACHE" -extract / "$WORK_DIR/iso" 2>/dev/null
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chmod -R u+w "$WORK_DIR/iso"
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# ── Add preseed to ISO root ────────────────────────────────────────
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# Accessible during install as /cdrom/preseed.cfg
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cp "$REPO_DIR/preseed.cfg" "$WORK_DIR/iso/preseed.cfg"
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# ── Auto-boot: GRUB (UEFI) ────────────────────────────────────────
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echo "==> Configuring auto-boot..."
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cat > "$WORK_DIR/iso/boot/grub/grub.cfg" << 'GRUBEOF'
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set default=0
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set timeout=5
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menuentry "SeniorNet Kiosk — Automatic Install" {
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linux /install.amd/vmlinuz preseed/file=/cdrom/preseed.cfg auto=true priority=critical quiet ---
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initrd /install.amd/initrd.gz
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}
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menuentry "SeniorNet Kiosk — Install (verbose)" {
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linux /install.amd/vmlinuz preseed/file=/cdrom/preseed.cfg auto=true priority=critical ---
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initrd /install.amd/initrd.gz
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}
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GRUBEOF
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# ── Auto-boot: isolinux (BIOS legacy) ─────────────────────────────
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if [ -f "$WORK_DIR/iso/isolinux/isolinux.cfg" ]; then
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cat > "$WORK_DIR/iso/isolinux/isolinux.cfg" << 'ISOEOF'
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default install
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timeout 50
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label install
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menu label SeniorNet Kiosk - Automatic Install
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kernel /install.amd/vmlinuz
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append initrd=/install.amd/initrd.gz preseed/file=/cdrom/preseed.cfg auto=true priority=critical quiet ---
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label verbose
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menu label SeniorNet Kiosk - Install (verbose)
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kernel /install.amd/vmlinuz
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append initrd=/install.amd/initrd.gz preseed/file=/cdrom/preseed.cfg auto=true priority=critical ---
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ISOEOF
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fi
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# ── Repack ISO (UEFI + BIOS hybrid) ───────────────────────────────
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echo "==> Building final ISO..."
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cd "$WORK_DIR/iso"
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xorriso -as mkisofs \
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-r -J -joliet-long \
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-V "SeniorNet Kiosk" \
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-b isolinux/isolinux.bin \
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-c isolinux/boot.cat \
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-no-emul-boot -boot-load-size 4 -boot-info-table \
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-eltorito-alt-boot \
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-e boot/grub/efi.img \
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-no-emul-boot \
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-isohybrid-gpt-basdat \
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-o "$OUTPUT_ISO" \
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. 2>&1 | tail -5
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# Make the ISO bootable from USB on both BIOS and UEFI machines
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isohybrid --uefi "$OUTPUT_ISO"
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echo
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SIZE=$(du -sh "$OUTPUT_ISO" | cut -f1)
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echo "==> ✓ ISO complete: $OUTPUT_ISO ($SIZE)"
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echo
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echo "Write to USB:"
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echo " sudo dd if=\"$OUTPUT_ISO\" of=/dev/sdX bs=4M status=progress && sync"
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echo
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echo "Boot from USB — Debian installs silently (~10 min) then reboots."
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echo "On first reboot: setup wizard prompts for username and senior's name."
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echo "Second reboot: kiosk is running."
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