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fix(install): stage the pre-activation script in /root — nixos-enter tmpfs-mounts /tmp

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The HM pre-activation never ran: the script was written to /mnt/tmp and
nixos-enter mounts a fresh tmpfs over /tmp inside the chroot, so `bash
/tmp/...` found nothing and the best-effort guard swallowed it. Verified
interactively that every inner step (path: build as root, runuser leg)
works in the chroot — only the staging path was broken. Now staged in
/root, with set -x logging persisted to /var/log/nomarchy-hm-preactivate.log
on the target and the tail echoed into the install transcript on failure.

Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>
This commit is contained in:
Bernardo Magri
2026-06-11 20:53:21 +01:00
parent 727f21005d
commit 134695806c
1 changed files with 11 additions and 6 deletions
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17
pkgs/nomarchy-install/nomarchy-install.sh
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@@ -464,10 +464,13 @@ success "System installed (bootloader in place)"
# fully themed desktop, not bare Hyprland. Best-effort: a failure here # fully themed desktop, not bare Hyprland. Best-effort: a failure here
# only costs the user one `home-manager switch` after logging in. # only costs the user one `home-manager switch` after logging in.
section "Baking the desktop" section "Baking the desktop"
cat > /mnt/tmp/nomarchy-hm-activate.sh <<EOF # NOT /mnt/tmp: nixos-enter mounts a fresh tmpfs over /tmp inside the
set -e # chroot, which silently vaporizes any script staged there (cost us a
# full verification round to find). /root persists into the chroot.
cat > /mnt/root/nomarchy-hm-activate.sh <<EOF
set -ex
exec > /var/log/nomarchy-hm-preactivate.log 2>&1
export PATH=/run/current-system/sw/bin:\$PATH export PATH=/run/current-system/sw/bin:\$PATH
export NIX_CONFIG=$(printf '%q' "$NIX_CONFIG")
out=\$(nix --extra-experimental-features "nix-command flakes" \ out=\$(nix --extra-experimental-features "nix-command flakes" \
build --no-link --print-out-paths \ build --no-link --print-out-paths \
--option substituters "" \ --option substituters "" \
@@ -476,13 +479,15 @@ install -d -o "$USERNAME" -g users /nix/var/nix/profiles/per-user/$USERNAME
install -d -o "$USERNAME" -g users /nix/var/nix/gcroots/per-user/$USERNAME install -d -o "$USERNAME" -g users /nix/var/nix/gcroots/per-user/$USERNAME
runuser -u "$USERNAME" -- bash -lc "USER=$USERNAME HOME=/home/$USERNAME \$out/activate" runuser -u "$USERNAME" -- bash -lc "USER=$USERNAME HOME=/home/$USERNAME \$out/activate"
EOF EOF
if nixos-enter --root /mnt -- bash /tmp/nomarchy-hm-activate.sh; then if nixos-enter --root /mnt -- bash /root/nomarchy-hm-activate.sh; then
success "Desktop pre-activated — first boot is fully themed" success "Desktop pre-activated — first boot is fully themed"
else else
warn "Desktop pre-activation failed; after first login run:" warn "Desktop pre-activation failed (see /var/log/nomarchy-hm-preactivate.log"
warn "on the installed system); after first login run:"
warn " home-manager switch --flake ~/.nomarchy -b bak" warn " home-manager switch --flake ~/.nomarchy -b bak"
tail -n 5 /mnt/var/log/nomarchy-hm-preactivate.log 2>/dev/null || true
fi fi
rm -f /mnt/tmp/nomarchy-hm-activate.sh rm -f /mnt/root/nomarchy-hm-activate.sh
header "Nomarchy installed on $TARGET_DISK" \ header "Nomarchy installed on $TARGET_DISK" \
"User: $USERNAME @ $HOSTNAME_" \ "User: $USERNAME @ $HOSTNAME_" \