feat: live ISO — nix daemon mode, autologin fix, GPU detection, app stack

- Switch nix from single-user to daemon mode (trusted-users = root live); Void socket at /var/nix/daemon-socket/socket confirmed - Fix lightdm autologin: use session-wrapper=/etc/lightdm/Xsession (Void lightdm 1.32 has no lightdm-session binary) - Fix session env: LIBGL_ALWAYS_SOFTWARE=1 via profile.d (session-env= is unsupported in this lightdm version) - GPU auto-detection at boot: VIRT→software GL, NVIDIA PRIME offload, Intel/AMD/generic→modesetting - Add nix-daemon to live runsvdir/default; remove unsupported -S mklive flag - first-login.sh: install Claude Code + nix user packages (google-chrome, spotify, discord, localsend, mission-center) + NVM/node + VS Code exts - build-live-iso.sh: write nix-packages.list from NIX_USER_PACKAGES - postinstall.sh: fix nix-daemon socket path to /var/nix/daemon-socket/socket - Dockerfile: add dconf-cli for build-time dconf compile - _inner-build-live.sh: use correct 'dconf compile' API (not 'dconf update') - .gitignore: add build/live-includes/ (generated staging tree) - docs/LIVE_ISO.md: document all findings, gotchas and architecture
2026-04-23 07:42:35 +02:00
parent 6269f2f877
commit 5cd9b496fd
8 changed files with 461 additions and 56 deletions
--- a/iso/build-live-iso.sh
+++ b/iso/build-live-iso.sh
@@ -70,57 +70,201 @@ rm -rf "$INCLUDE_DIR"
 mkdir -p "$INCLUDE_DIR"

 # ── 3a) live user account ───────────────────────────────────────────────
-# Create user 'live' with no password in the live image.
-# mklive populates /etc/passwd at install time — we drop a post-install hook
-# via the live init that calls useradd. We use an install.conf.d override
-# that mklive will source, plus an rc.local-style runit oneshot.
+# The vmklive dracut hook (adduser.sh) creates the live user in initramfs
+# using the live.user= kernel cmdline parameter (added to BOOT_CMDLINE below).
+# We add extra groups and sudo via /etc/runit/2 override (after pivot_root).
 install -d -m 0755 "$INCLUDE_DIR/etc"
-cat > "$INCLUDE_DIR/etc/passwd-live" <<EOF
-# placeholder replaced at build time by _inner-build-live.sh
-EOF

-# rc.local equivalent: runit oneshot that creates the live user on first boot.
-install -d -m 0755 "$INCLUDE_DIR/etc/runit/runsvdir/default"
-install -d -m 0755 "$INCLUDE_DIR/etc/sv/live-user-setup"
-cat > "$INCLUDE_DIR/etc/sv/live-user-setup/run" <<'SV_EOF'
+# GPU detection + extra group setup — runs from our runit/2 override below.
+install -d -m 0755 "$INCLUDE_DIR/etc/runit"
+cat > "$INCLUDE_DIR/etc/runit/live-setup.sh" <<'SV_EOF'
 #!/bin/sh
-# Create the 'live' user (no password) and set up home directory.
-# Runs once; removes itself from default runsvdir on completion.
-set -e
-if ! id live >/dev/null 2>&1; then
-    useradd -m -s /bin/bash -G wheel,audio,video,plugdev,input,network,docker live
-    passwd -d live
-    install -d -m 0700 /home/live/.ssh
-    # Apply skel dotfiles
-    if [ -d /etc/skel ]; then
-        cp -a /etc/skel/. /home/live/ 2>/dev/null || true
-    fi
-    chown -R live:live /home/live
+# Runs from /etc/runit/2 before any service starts.
+# 1. Ensures live user has all needed groups.
+# 2. Generates /etc/X11/xorg.conf.d/20-gpu.conf based on detected hardware.
+
+LIVE_USER="${USERNAME:-live}"
+[ -f /etc/default/live.conf ] && . /etc/default/live.conf
+LIVE_USER="${USERNAME:-live}"
+
+# Extra groups (dracut only adds audio,video,wheel)
+for g in plugdev input network docker; do
+    groupadd -f "$g" 2>/dev/null || true
+    usermod -aG "$g" "$LIVE_USER" 2>/dev/null || true
+done
+install -d -m 0755 /etc/sudoers.d
+printf '%s ALL=(ALL) NOPASSWD: ALL\n' "$LIVE_USER" > /etc/sudoers.d/live
+chmod 0440 /etc/sudoers.d/live
+
+# ── Nix daemon-mode setup ───────────────────────────────────────────────
+# Void's xbps nix package ships nix-daemon + a runit service at /etc/sv/nix-daemon
+# and puts the socket at /var/nix/daemon-socket/socket.
+# We configure the daemon to trust the live user so 'nix profile install'
+# works without root and without owning /nix/store.
+if [ -x /usr/bin/nix ]; then
+    install -d -m 0755 /etc/nix
+    cat > /etc/nix/nix.conf <<NIXCONF
+experimental-features = nix-command flakes
+sandbox = false
+auto-optimise-store = true
+trusted-users = root $LIVE_USER
+NIXCONF
+    # Ensure nix.sh profile.d sets PATH for installed nix packages.
+    # The Void nix package ships /etc/profile.d/nix.sh; we just supplement it.
+    cat > /etc/profile.d/nix-live.sh <<'NIXSH'
+# Add nix user-profile bin to PATH
+if [ -d "$HOME/.nix-profile/bin" ]; then
+    export PATH="$HOME/.nix-profile/bin:$PATH"
 fi
-# Enable sudoers entry for live
-if ! grep -q '^live ' /etc/sudoers 2>/dev/null; then
-    echo 'live ALL=(ALL) NOPASSWD: ALL' >> /etc/sudoers
+NIXSH
+    chmod 0644 /etc/profile.d/nix-live.sh
+    echo "live-setup: nix daemon mode configured (trusted-users = $LIVE_USER)"
+fi
+
+# ── D-Bus session socket for the live user's login session ───────────────
+# dbus-launch is called by lightdm-session / Xsession automatically.
+# Ensure dbus system bus is accessible (needed by nix and Cinnamon).
+# The dbus runit service is enabled in runsvdir/default; no extra setup needed.
+
+# ── GPU / Xorg driver detection ──────────────────────────────────────────
+mkdir -p /etc/X11/xorg.conf.d
+
+# Detect GPU via PCI
+HAS_NVIDIA=0
+HAS_INTEL=0
+HAS_AMD=0
+IS_VIRT=0
+
+if command -v lspci >/dev/null 2>&1; then
+    lspci_out=$(lspci 2>/dev/null)
+    echo "$lspci_out" | grep -qi 'NVIDIA' && HAS_NVIDIA=1
+    echo "$lspci_out" | grep -qiE 'Intel.*VGA|VGA.*Intel|Intel.*Integrated' && HAS_INTEL=1
+    echo "$lspci_out" | grep -qiE 'AMD.*VGA|VGA.*AMD|ATI.*VGA|Radeon' && HAS_AMD=1
+    echo "$lspci_out" | grep -qiE 'virtio|VMware|QEMU|VirtualBox|bochs' && IS_VIRT=1
+fi
+
+if [ $IS_VIRT -eq 1 ]; then
+    # Virtual machine: force modesetting, disable accel, use software GL
+    cat > /etc/X11/xorg.conf.d/20-gpu.conf <<'EOF'
+Section "Device"
+    Identifier "GPU"
+    Driver     "modesetting"
+    Option     "AccelMethod" "none"
+EndSection
+EOF
+    # Xsession sources /etc/profile which sources /etc/profile.d/ — so this
+    # env var reaches the cinnamon session (LightDM's session-env is not
+    # supported in the Void-packaged lightdm 1.32).
+    echo 'export LIBGL_ALWAYS_SOFTWARE=1' > /etc/profile.d/live-env.sh
+    chmod 0644 /etc/profile.d/live-env.sh
+    echo "live-setup: VIRT detected — modesetting (no accel), software GL"
+elif [ $HAS_NVIDIA -eq 1 ] && [ -e /usr/lib/xorg/modules/drivers/nvidia_drv.so ]; then
+    # NVIDIA PRIME (Intel iGPU primary + NVIDIA render offload)
+    # Real hardware — ensure software GL is NOT forced
+    rm -f /etc/profile.d/live-env.sh
+    INTEL_BUSID=$(lspci | grep -iE 'VGA.*Intel|Intel.*VGA' | head -1 | \
+        awk '{print $1}' | awk -F'[.:]' '{printf "PCI:%d:%d:%d", strtonum("0x"$1), strtonum("0x"$2), strtonum("0x"$3)}')
+    NVIDIA_BUSID=$(lspci | grep -i NVIDIA | head -1 | \
+        awk '{print $1}' | awk -F'[.:]' '{printf "PCI:%d:%d:%d", strtonum("0x"$1), strtonum("0x"$2), strtonum("0x"$3)}')
+    cat > /etc/X11/xorg.conf.d/20-gpu.conf <<EOF
+Section "ServerLayout"
+    Identifier "layout"
+    Option     "AllowNVIDIAGPUScreens"
+EndSection
+Section "Device"
+    Identifier "Intel"
+    Driver     "modesetting"
+    BusID      "${INTEL_BUSID:-PCI:0:2:0}"
+EndSection
+Section "Device"
+    Identifier "NVIDIA"
+    Driver     "nvidia"
+    BusID      "${NVIDIA_BUSID:-PCI:1:0:0}"
+    Option     "AllowEmptyInitialConfiguration"
+EndSection
+EOF
+    echo "live-setup: NVIDIA PRIME detected (Intel=${INTEL_BUSID} NVIDIA=${NVIDIA_BUSID})"
+elif [ $HAS_NVIDIA -eq 1 ]; then
+    # NVIDIA present but no proprietary driver — use modesetting
+    rm -f /etc/profile.d/live-env.sh
+    cat > /etc/X11/xorg.conf.d/20-gpu.conf <<'EOF'
+Section "Device"
+    Identifier "GPU"
+    Driver     "modesetting"
+EndSection
+EOF
+    echo "live-setup: NVIDIA detected but no proprietary driver — modesetting"
+else
+    # Intel / AMD / generic — modesetting
+    rm -f /etc/profile.d/live-env.sh
+    cat > /etc/X11/xorg.conf.d/20-gpu.conf <<'EOF'
+Section "Device"
+    Identifier "GPU"
+    Driver     "modesetting"
+EndSection
+EOF
+    echo "live-setup: Generic/Intel/AMD — modesetting"
 fi
-# Remove self from runsvdir so it doesn't restart
-rm -f /etc/runit/runsvdir/default/live-user-setup
-sv stop live-user-setup 2>/dev/null || true
 SV_EOF
-chmod 0755 "$INCLUDE_DIR/etc/sv/live-user-setup/run"
-ln -sf /etc/sv/live-user-setup "$INCLUDE_DIR/etc/runit/runsvdir/default/live-user-setup"
+chmod 0755 "$INCLUDE_DIR/etc/runit/live-setup.sh"
+
+# Override /etc/runit/2 — mirrors real runit-void stage 2 but runs live-setup.sh first.
+# Real runit-void/2: runsvchdir default → runsvdir /run/runit/runsvdir/current
+cat > "$INCLUDE_DIR/etc/runit/2" <<'SV_EOF'
+#!/bin/sh
+PATH=/usr/bin:/usr/sbin
+
+# Live session setup: extra groups, sudo, GPU/Xorg detection
+[ -x /etc/runit/live-setup.sh ] && /etc/runit/live-setup.sh
+
+# Mirror real runit-void stage 2: select runlevel from cmdline (default: default)
+runlevel=default
+for arg in $(cat /proc/cmdline); do
+    if [ -d /etc/runit/runsvdir/"$arg" ]; then
+        runlevel="$arg"
+    fi
+done
+
+[ -x /etc/rc.local ] && /etc/rc.local
+
+runsvchdir "${runlevel}"
+mkdir -p /run/runit/runsvdir
+ln -sf /etc/runit/runsvdir/current /run/runit/runsvdir/current
+
+exec env - PATH=$PATH \
+    runsvdir -P /run/runit/runsvdir/current \
+    'log: ...........................................................................................................................................................................................................................................................................................................................................................................................................'
+SV_EOF
+chmod 0755 "$INCLUDE_DIR/etc/runit/2"
+
+install -d -m 0755 "$INCLUDE_DIR/etc/runit/runsvdir/default"

 # ── 3b) LightDM autologin ───────────────────────────────────────────────
 install -d -m 0755 "$INCLUDE_DIR/etc/lightdm"
-cat > "$INCLUDE_DIR/etc/lightdm/lightdm.conf" <<EOF
+# .session file: read by the vmklive dracut hook (display-manager-autologin.sh)
+# to configure LightDM autologin session.
+echo 'cinnamon' > "$INCLUDE_DIR/etc/lightdm/.session"
+# lightdm.conf: autologin lines MUST be commented so the dracut
+# display-manager-autologin.sh hook can sed-uncomment them.
+cat > "$INCLUDE_DIR/etc/lightdm/lightdm.conf" <<'EOF'
 [Seat:*]
-autologin-user=${LIVE_USER}
-autologin-user-timeout=0
-user-session=cinnamon
+#autologin-user=
+#autologin-user-timeout=0
+#autologin-session=
+#user-session=
+session-wrapper=/etc/lightdm/Xsession
 greeter-session=lightdm-gtk-greeter
 EOF
+# NOTE: session-wrapper=/etc/lightdm/Xsession is required on Void Linux —
+# LightDM defaults to 'lightdm-session' which is NOT provided by the Void
+# lightdm package.  The /etc/lightdm/Xsession wrapper is installed by the
+# lightdm package and sources /etc/profile (and therefore /etc/profile.d/)
+# so LIBGL_ALWAYS_SOFTWARE=1 placed there by live-setup.sh is propagated to
+# the cinnamon session.

 install -d -m 0755 "$INCLUDE_DIR/etc/runit/runsvdir/default"
-# Enable NetworkManager, lightdm, pipewire and dbus for the live session.
-for svc in dbus NetworkManager lightdm; do
+# Enable services for the live session.
+for svc in dbus NetworkManager lightdm nix-daemon; do
    ln -sf "/etc/sv/$svc" "$INCLUDE_DIR/etc/runit/runsvdir/default/$svc" 2>/dev/null || true
 done

@@ -285,6 +429,20 @@ case ":$PATH:" in
 esac
 EOF

+# ── 3f-bis) Nix user packages list for first-login.sh ───────────────────
+# Write NIX_USER_PACKAGES (from install.conf) as a plain list so
+# first-login.sh can read it without sourcing install.conf.
+install -d -m 0755 "$INCLUDE_DIR/usr/local/libexec"
+{
+    for pkg in "${NIX_USER_PACKAGES[@]}"; do
+        echo "$pkg"
+    done
+} > "$INCLUDE_DIR/usr/local/libexec/nix-packages.list"
+# Also set the env var so first-login.sh knows where to find it.
+cat > "$INCLUDE_DIR/etc/profile.d/nix-packages-path.sh" <<'EOF'
+export NIX_PACKAGES_FILE=/usr/local/libexec/nix-packages.list
+EOF
+
 # ── 3g) Live-session skel: pre-wire .bash_profile for first-login ────────
 install -d -m 0755 "$INCLUDE_DIR/etc/skel"
 cat > "$INCLUDE_DIR/etc/skel/.bash_profile" <<'EOF'
@@ -313,6 +471,9 @@ ISO_PKGS=$(grep -vE '^\s*(#|$)' \
    | tr '\n' ' ')
 TS="$(date -u +%Y%m%d)"
 OUT_ISO="${OUTPUT_ISO:-$OUT_DIR/void-live-stable-${TS}.iso}"
+# live.user=live → vmklive dracut hook creates user 'live' (default would be 'anon')
+# console=ttyS0 → serial output for QEMU/real hardware debugging
+BOOT_CMDLINE="${BOOT_CMDLINE:-live.user=${LIVE_USER} console=tty0 console=ttyS0,115200}"

 echo ">>> running mklive.sh inside docker — output: $OUT_ISO"
 "$DOCKER" run --rm --privileged \