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pass XAUTHORITY to builds for SDL display in X11 sessions

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Copy Xauthority to a world-readable temp file so nix build users
(nixbld*) can authenticate to X11. Add --option sandbox relaxed so
__noChroot derivations can access the X11 socket and xauth file.

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>
This commit is contained in:
Git Sagar 2026-05-31 04:51:53 -03:00
parent 7dd67bc893
commit 5fbdd36107
3 changed files with 13 additions and 7 deletions
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14
cli.nix
View file

@ -168,16 +168,20 @@ pkgs.writeShellScriptBin "vmix" ''
[[ -n "$TO_REMOTE_DISK" ]] && echo "To remote: $TO_REMOTE_DISK"
echo ""
# pass DISPLAY to nix builds via temp file (daemon sanitizes env vars)
# pass DISPLAY+XAUTHORITY to nix builds via temp file (daemon sanitizes env vars)
# copy Xauthority world-readable so nix build users (nixbld*) can authenticate to X11
VMIX_DISPLAY_FILE="/tmp/.vmix-display-$$"
VMIX_XAUTH_FILE="/tmp/.vmix-xauth-$$"
if [[ -n "''${DISPLAY:-}" ]]; then
echo "$DISPLAY" > "$VMIX_DISPLAY_FILE"
chmod 666 "$VMIX_DISPLAY_FILE"
cp "''${XAUTHORITY:-''${HOME}/.Xauthority}" "$VMIX_XAUTH_FILE"
chmod 644 "$VMIX_XAUTH_FILE"
printf '%s\n' "''${DISPLAY}" "$VMIX_XAUTH_FILE" > "$VMIX_DISPLAY_FILE"
chmod 644 "$VMIX_DISPLAY_FILE"
fi
trap 'rm -f "$VMIX_DISPLAY_FILE"' EXIT
trap 'rm -f "$VMIX_DISPLAY_FILE" "$VMIX_XAUTH_FILE"' EXIT
echo "Building image..."
${pkgs.nix}/bin/nix build --out-link "$OUT_LINK" --print-build-logs --impure --expr "
${pkgs.nix}/bin/nix build --out-link "$OUT_LINK" --print-build-logs --impure --option sandbox relaxed --expr "
let
vmixLib = (builtins.getFlake \"$FLAKE_DIR\").lib.${system};
image = vmixLib.$IMAGE_NAME;

3
lib/images/windows/helpers/customizeImage.nix
View file

@ -85,7 +85,8 @@
${lib.optionalString (vncDisplay == null) ''
VMIX_DF=$(ls -t /tmp/.vmix-display-* 2>/dev/null | head -1)
if [ -n "$VMIX_DF" ]; then
export DISPLAY=$(cat "$VMIX_DF")
export DISPLAY=$(sed -n '1p' "$VMIX_DF")
export XAUTHORITY=$(sed -n '2p' "$VMIX_DF")
export HOME=$(mktemp -d)
export XDG_RUNTIME_DIR=$HOME
export SDL_VIDEODRIVER=x11

3
lib/images/windows/helpers/makeImage.nix
View file

@ -51,7 +51,8 @@ let
${lib.optionalString (displayArg == null) ''
VMIX_DF=$(ls -t /tmp/.vmix-display-* 2>/dev/null | head -1)
if [ -n "$VMIX_DF" ]; then
export DISPLAY=$(cat "$VMIX_DF")
export DISPLAY=$(sed -n '1p' "$VMIX_DF")
export XAUTHORITY=$(sed -n '2p' "$VMIX_DF")
export HOME=$(mktemp -d)
export XDG_RUNTIME_DIR=$HOME
export SDL_VIDEODRIVER=x11