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vmix CLI, laptop images, SDL display

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CLI (nix run .#):
- `vmix build` and `vmix copy` subcommands
- --image, --generalize key=val, --to-disk, --to-remote-disk
- SDL display auto-detected via DISPLAY temp file passthrough
- --print-build-logs for visible build progress
- -S 4k sparse writes for faster disk copy

Images:
- win10.laptop and win11.laptop bundles (no VirtIO, keeps defender/hibernation)
- templates.bundles.laptop shared template list
- win11 adds reg.disableUCPD on top

Build improvements:
- consistent === vmix: === log prefixes
- SDL display via /tmp/.vmix-display-$$ temp file

Env helpers:
- .env-export-vmix-cli-local: vmix alias for local flake

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>
This commit is contained in:
Git Sagar 2026-05-23 21:56:51 -03:00
parent 94f299bb81
commit 015714f713
8 changed files with 250 additions and 53 deletions
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210
flake.nix
View file

@ -21,61 +21,154 @@
lib.${system} = vmixLib;
packages.${system} = {
toDisk = pkgs.writeShellScriptBin "vmix-to-disk" ''
set -euo pipefail
packages.${system}.default = pkgs.writeShellScriptBin "vmix" ''
set -euo pipefail
usage() {
echo "Usage: vmix-to-disk <qcow2-image> <target-disk>"
echo ""
echo "Write a vmix qcow2 image to a physical disk and expand the Windows partition."
echo ""
echo "Examples:"
echo " vmix-to-disk /nix/store/...-win10-ltsc-vmix.qcow2 /dev/sda"
echo " vmix-to-disk ./my-image.qcow2 /dev/nvme0n1"
exit 1
}
usage() {
echo "Usage:"
echo " vmix build --image <path> [--generalize key=val,...] [--out-link PATH]"
echo " vmix copy --image <path> [--generalize key=val,...] --to-disk /dev/sdX"
echo " vmix copy --image <path> [--generalize key=val,...] --to-remote-disk user@host:/dev/sdX"
echo ""
echo "Commands:"
echo " build Build a vmix image (optionally generalized)"
echo " copy Build a vmix image and write it to a disk"
echo ""
echo "Options:"
echo " --image PATH Image path in vmixLib (e.g. windows.images.win10.laptop)"
echo " --generalize KEY=VAL,... Generalize with comma-separated options:"
echo " username=User password= hostname=WIN-PC"
echo " timezone=UTC bgColor=8e8cd8"
echo " --to-disk DEVICE Write to local disk and expand partitions"
echo " --to-remote-disk SSH:DEV Stream to remote disk via SSH and expand partitions"
echo " e.g. root@10.10.10.100:/dev/sda"
echo " --out-link PATH Symlink for the build result (default: ./result)"
echo ""
echo "Examples:"
echo " vmix build --image windows.images.win10.laptop \\"
echo " --generalize username=Sagar,password=secret,hostname=LAPTOP"
echo ""
echo " vmix copy --image windows.images.win10.laptop \\"
echo " --generalize username=Sagar,password=secret,hostname=LAPTOP \\"
echo " --to-disk /dev/sda"
echo ""
echo " vmix copy --image windows.images.win10.laptop \\"
echo " --generalize username=Sagar,password=secret,hostname=LAPTOP \\"
echo " --to-remote-disk root@10.10.10.100:/dev/nvme0n1"
exit 1
}
[[ ''${#} -ne 2 ]] && usage
[[ ''${#} -eq 0 ]] && usage
IMAGE="$1"
DISK="$2"
COMMAND="$1"; shift
[[ $EUID -ne 0 ]] && { echo "Error: must run as root"; exit 1; }
[[ ! -f "$IMAGE" ]] && { echo "Error: image not found: $IMAGE"; exit 1; }
[[ ! -b "$DISK" ]] && { echo "Error: not a block device: $DISK"; exit 1; }
case "$COMMAND" in
build|copy) ;;
--help|-h) usage ;;
*) echo "Unknown command: $COMMAND"; usage ;;
esac
if ${pkgs.util-linux}/bin/mount | grep -q "^''${DISK}"; then
echo "Error: $DISK has mounted partitions — unmount first"
IMAGE_NAME=""
GENERALIZE=""
TO_DISK=""
TO_REMOTE_DISK=""
OUT_LINK="./result"
while [[ ''${#} -gt 0 ]]; do
case "$1" in
--image) IMAGE_NAME="$2"; shift 2 ;;
--generalize) GENERALIZE="$2"; shift 2 ;;
--to-disk) TO_DISK="$2"; shift 2 ;;
--to-remote-disk) TO_REMOTE_DISK="$2"; shift 2 ;;
--out-link) OUT_LINK="$2"; shift 2 ;;
--help|-h) usage ;;
*) echo "Unknown option: $1"; usage ;;
esac
done
[[ -z "$IMAGE_NAME" ]] && { echo "Error: --image is required"; usage; }
if [[ "$COMMAND" == "copy" && -z "$TO_DISK" && -z "$TO_REMOTE_DISK" ]]; then
echo "Error: copy requires --to-disk or --to-remote-disk"
usage
fi
# parse --generalize key=val,key=val into nix attrs
GENERALIZE_EXPR=""
if [[ -n "$GENERALIZE" ]]; then
NIX_ARGS=""
IFS=',' read -ra PAIRS <<< "$GENERALIZE"
for pair in "''${PAIRS[@]}"; do
key="''${pair%%=*}"
val="''${pair#*=}"
NIX_ARGS+="$key = \"$val\"; "
done
GENERALIZE_EXPR=".generalize { $NIX_ARGS }"
fi
FLAKE_DIR="${self}"
echo "=== vmix $COMMAND ==="
echo "Image: $IMAGE_NAME"
[[ -n "$GENERALIZE" ]] && echo "Generalize: $GENERALIZE"
[[ -n "$TO_DISK" ]] && echo "To disk: $TO_DISK"
[[ -n "$TO_REMOTE_DISK" ]] && echo "To remote: $TO_REMOTE_DISK"
echo ""
# pass DISPLAY to nix builds via temp file (daemon sanitizes env vars)
VMIX_DISPLAY_FILE="/tmp/.vmix-display-$$"
if [[ -n "''${DISPLAY:-}" ]]; then
echo "$DISPLAY" > "$VMIX_DISPLAY_FILE"
chmod 666 "$VMIX_DISPLAY_FILE"
fi
trap 'rm -f "$VMIX_DISPLAY_FILE"' EXIT
echo "Building image..."
${pkgs.nix}/bin/nix build --out-link "$OUT_LINK" --print-build-logs --impure --expr "
let
vmixLib = (builtins.getFlake \"$FLAKE_DIR\").lib.${system};
image = vmixLib.$IMAGE_NAME;
in image$GENERALIZE_EXPR
"
IMAGE_FILE=$(readlink -f "$OUT_LINK")
echo "Built: $IMAGE_FILE"
if [[ -n "$TO_DISK" ]]; then
echo ""
[[ $EUID -ne 0 ]] && { echo "Error: --to-disk requires root"; exit 1; }
[[ ! -b "$TO_DISK" ]] && { echo "Error: not a block device: $TO_DISK"; exit 1; }
if ${pkgs.util-linux}/bin/mount | grep -q "^''${TO_DISK}"; then
echo "Error: $TO_DISK has mounted partitions — unmount first"
exit 1
fi
DISK_SIZE=$(${pkgs.util-linux}/bin/blockdev --getsize64 "$DISK")
DISK_SIZE=$(${pkgs.util-linux}/bin/blockdev --getsize64 "$TO_DISK")
DISK_SIZE_GB=$(( DISK_SIZE / 1024 / 1024 / 1024 ))
echo "=== vmix to physical disk ==="
echo "Image: $IMAGE"
echo "Target: $DISK ($DISK_SIZE_GB GB)"
echo "=== writing to disk ==="
echo "Target: $TO_DISK ($DISK_SIZE_GB GB)"
echo ""
echo "WARNING: This will DESTROY all data on $DISK"
echo "WARNING: This will DESTROY all data on $TO_DISK"
read -rp "Continue? [y/N] " confirm
[[ "$confirm" != "y" && "$confirm" != "Y" ]] && { echo "Aborted."; exit 0; }
echo ""
echo "[1/4] Writing image to disk..."
${pkgs.qemu}/bin/qemu-img convert -p -f qcow2 -O raw "$IMAGE" "$DISK"
${pkgs.qemu}/bin/qemu-img convert -p -S 4k -f qcow2 -O raw "$IMAGE_FILE" "$TO_DISK"
echo "[2/4] Fixing GPT backup header..."
${pkgs.gptfdisk}/bin/sgdisk -e "$DISK"
${pkgs.gptfdisk}/bin/sgdisk -e "$TO_DISK"
echo "[3/4] Expanding Windows partition (partition 3) to fill disk..."
${pkgs.parted}/bin/parted -s "$DISK" resizepart 3 100%
${pkgs.parted}/bin/parted -s "$TO_DISK" resizepart 3 100%
# detect partition device name (nvme/mmcblk use p3, others use 3)
if [[ "$DISK" == *nvme* ]] || [[ "$DISK" == *mmcblk* ]]; then
WIN_PART="''${DISK}p3"
if [[ "$TO_DISK" == *nvme* ]] || [[ "$TO_DISK" == *mmcblk* ]]; then
WIN_PART="''${TO_DISK}p3"
else
WIN_PART="''${DISK}3"
WIN_PART="''${TO_DISK}3"
fi
echo "[4/4] Expanding NTFS filesystem on $WIN_PART..."
@ -83,14 +176,53 @@
echo "y" | ${pkgs.ntfs3g}/bin/ntfsresize --force "$WIN_PART"
echo ""
echo "Done. Windows partition expanded to fill $DISK."
echo "You can now boot from the disk."
'';
};
echo "Done. $TO_DISK is ready to boot."
fi
apps.${system}.toDisk = {
if [[ -n "$TO_REMOTE_DISK" ]]; then
echo ""
REMOTE_HOST="''${TO_REMOTE_DISK%%:*}"
REMOTE_DISK="''${TO_REMOTE_DISK#*:}"
[[ -z "$REMOTE_HOST" || -z "$REMOTE_DISK" ]] && { echo "Error: --to-remote-disk format is user@host:/dev/sdX"; exit 1; }
echo "=== writing to remote disk ==="
echo "Host: $REMOTE_HOST"
echo "Disk: $REMOTE_DISK"
echo ""
echo "WARNING: This will DESTROY all data on $REMOTE_HOST:$REMOTE_DISK"
read -rp "Continue? [y/N] " confirm
[[ "$confirm" != "y" && "$confirm" != "Y" ]] && { echo "Aborted."; exit 0; }
echo ""
echo "[1/4] Streaming image to remote disk..."
${pkgs.qemu}/bin/qemu-img convert -f qcow2 -O raw "$IMAGE_FILE" /dev/stdout \
| ssh "$REMOTE_HOST" "dd of=$REMOTE_DISK bs=4M status=progress oflag=direct"
echo "[2/4] Fixing GPT backup header..."
ssh "$REMOTE_HOST" "sgdisk -e $REMOTE_DISK"
echo "[3/4] Expanding Windows partition (partition 3) to fill disk..."
ssh "$REMOTE_HOST" "parted -s $REMOTE_DISK resizepart 3 100%"
if [[ "$REMOTE_DISK" == *nvme* ]] || [[ "$REMOTE_DISK" == *mmcblk* ]]; then
REMOTE_WIN_PART="''${REMOTE_DISK}p3"
else
REMOTE_WIN_PART="''${REMOTE_DISK}3"
fi
echo "[4/4] Expanding NTFS filesystem on $REMOTE_WIN_PART..."
ssh "$REMOTE_HOST" "echo y | ntfsresize --force $REMOTE_WIN_PART"
echo ""
echo "Done. $REMOTE_HOST:$REMOTE_DISK is ready to boot."
fi
'';
apps.${system}.default = {
type = "app";
program = "${self.packages.${system}.toDisk}/bin/vmix-to-disk";
program = "${self.packages.${system}.default}/bin/vmix";
};
};
}