feat: initial commit — void-installer multi-profile (stable-cinnamon + mainline-niri)

installer/lib/grub.sh

@@ -0,0 +1,56 @@
+#!/bin/bash
+# GRUB UEFI install with dual-boot (Windows on /dev/nvme0n1p3 via os-prober).
+
+# shellcheck source=common.sh
+source "$(dirname "${BASH_SOURCE[0]}")/common.sh"
+
+install_grub() {
+    step "Installing GRUB (UEFI, bootloader-id=$BOOTLOADER_ID)"
+
+    local TARGET="${TARGET:-/mnt}"
+
+    if ! is_uefi; then
+        die "non-UEFI boot detected; this installer only supports UEFI"
+    fi
+
+    # Configure /etc/default/grub
+    cat > "$TARGET/etc/default/grub" <<'GRUBEOF'
+GRUB_DEFAULT=0
+GRUB_TIMEOUT=5
+GRUB_DISTRIBUTOR="Void"
+GRUB_CMDLINE_LINUX_DEFAULT="loglevel=4 nvidia-drm.modeset=1"
+GRUB_CMDLINE_LINUX=""
+GRUB_DISABLE_OS_PROBER=false
+GRUB_TERMINAL_OUTPUT="gfxterm"
+GRUB_GFXMODE=auto
+GRUBEOF
+
+    # Make sure os-prober can see the NTFS partitions to enumerate Windows.
+    run_chroot "modprobe efivarfs 2>/dev/null || true"
+    run_chroot "xbps-install -y os-prober ntfs-3g >/dev/null 2>&1 || true"
+
+    run_chroot "grub-install \
+        --target=x86_64-efi \
+        --efi-directory=/boot/efi \
+        --bootloader-id='$BOOTLOADER_ID' \
+        --recheck"
+
+    # Ensure os-prober actually runs (some hosts skip it without this).
+    mkdir -p "$TARGET/etc/grub.d"
+
+    # Generate config
+    run_chroot "grub-mkconfig -o /boot/grub/grub.cfg"
+
+    # Verify Windows entry was found (best-effort, non-fatal in test mode)
+    if grep -q -i 'windows\|microsoft' "$TARGET/boot/grub/grub.cfg"; then
+        ok "Windows boot entry detected in grub.cfg"
+    else
+        if [[ "${TEST_MODE:-0}" == "1" ]]; then
+            log "no Windows entry (expected in test mode)"
+        else
+            warn "no Windows entry in grub.cfg — os-prober may have failed; you can re-run grub-mkconfig later"
+        fi
+    fi
+
+    ok "GRUB installed"
+}