Classify T2 built-in trackpads as internal

install/hardware/apple/fix-t2.sh

@@ -26,6 +26,14 @@ if lspci -nn | grep "106b:180[12]" >/dev/null; then
   echo "MODULES+=(t2bce_vhci usbhid hid_apple hid_generic xhci_pci xhci_hcd)" > \
     /etc/mkinitcpio.conf.d/apple-t2.conf
 
+  # The same virtual USB bridge makes the built-in trackpad look removable to
+  # libinput. Mark only Apple's Internal Keyboard / Trackpad device as internal
+  # so disable-while-typing is available without affecting external trackpads.
+  install -Dm644 "$OMARCHY_PATH/install/hardware/apple/t2-trackpad.hwdb" \
+    /etc/udev/hwdb.d/71-omarchy-t2-trackpad.hwdb
+  systemd-hwdb update
+  udevadm trigger --subsystem-match=input --action=change || true
+
   mkdir -p /etc/limine-entry-tool.d
   cat > /etc/limine-entry-tool.d/t2-mac.conf <<'EOF'
 # Generated by Omarchy installer for T2 Mac support

install/hardware/apple/t2-trackpad.hwdb

@@ -0,0 +1,5 @@
+# The T2 virtual USB bridge makes the built-in MacBook trackpad look removable.
+# Match the internal composite device by name so product-ID differences between
+# T2 models do not disable libinput's disable-while-typing support.
+touchpad:usb:v05acp*:name:Apple Inc. Apple Internal Keyboard / Trackpad:*
+ ID_INPUT_TOUCHPAD_INTEGRATION=internal

migrations/1788912000.sh

@@ -0,0 +1,17 @@
+echo "Mark T2 MacBook built-in trackpads as internal"
+
+source_hwdb="$OMARCHY_PATH/install/hardware/apple/t2-trackpad.hwdb"
+target_hwdb="${OMARCHY_T2_TRACKPAD_HWDB:-/etc/udev/hwdb.d/71-omarchy-t2-trackpad.hwdb}"
+
+# Existing T2 installs already passed the hardware installer, so repair them on
+# update. Keep the same PCI gate as fix-t2.sh and only rebuild the hwdb when the
+# shipped rule differs from what is installed.
+if lspci -nn | grep "106b:180[12]" >/dev/null; then
+  if ! cmp -s "$source_hwdb" "$target_hwdb"; then
+    sudo install -Dm644 "$source_hwdb" "$target_hwdb"
+    sudo systemd-hwdb update
+    # A failed live retrigger is non-fatal: the compiled rule will apply on the
+    # next device enumeration or reboot.
+    sudo udevadm trigger --subsystem-match=input --action=change || true
+  fi
+fi

test/shell.d/t2-trackpad-test.sh

@@ -0,0 +1,121 @@
+#!/bin/bash
+
+set -euo pipefail
+source "$(cd -- "$(dirname -- "${BASH_SOURCE[0]}")" && pwd)/base-test.sh"
+
+fix_t2="$ROOT/install/hardware/apple/fix-t2.sh"
+hwdb="$ROOT/install/hardware/apple/t2-trackpad.hwdb"
+migration="$ROOT/migrations/1788912000.sh"
+
+require_command systemd-hwdb
+
+# Fresh T2 installs must deploy the same rule that the migration uses, compile
+# the hwdb, and try to refresh existing input devices immediately.
+grep -Fq 'install -Dm644 "$OMARCHY_PATH/install/hardware/apple/t2-trackpad.hwdb"' "$fix_t2" ||
+  fail "fresh T2 setup installs the internal-trackpad hwdb rule"
+grep -Fq 'systemd-hwdb update' "$fix_t2" ||
+  fail "fresh T2 setup compiles the updated hwdb"
+grep -Fq 'udevadm trigger --subsystem-match=input --action=change || true' "$fix_t2" ||
+  fail "fresh T2 setup retriggers input devices without making install depend on it"
+pass "fresh T2 setup installs and activates the trackpad classification"
+
+test_tmp=$(mktemp -d)
+trap 'rm -rf "$test_tmp"' EXIT
+
+# Validate the actual shipped rule with systemd-hwdb. Product IDs differ across
+# T2 models, while the built-in composite device name stays specific enough not
+# to match an external Magic Trackpad.
+hwdb_root="$test_tmp/hwdb-root"
+mkdir -p "$hwdb_root/etc/udev/hwdb.d"
+cp "$hwdb" "$hwdb_root/etc/udev/hwdb.d/71-omarchy-t2-trackpad.hwdb"
+systemd-hwdb --root="$hwdb_root" --strict update
+
+query_hwdb() {
+  systemd-hwdb --root="$hwdb_root" query "$1" 2>/dev/null || true
+}
+
+for product in 027b 027e; do
+  result=$(query_hwdb "touchpad:usb:v05acp${product}:name:Apple Inc. Apple Internal Keyboard / Trackpad:")
+  grep -Fxq 'ID_INPUT_TOUCHPAD_INTEGRATION=internal' <<<"$result" ||
+    fail "T2 internal trackpad product $product is classified as internal" "$result"
+done
+pass "known T2 internal trackpads match the shipped hwdb rule"
+
+magic=$(query_hwdb 'touchpad:usb:v05acp0265:name:Apple Inc. Magic Trackpad:')
+! grep -q 'ID_INPUT_TOUCHPAD_INTEGRATION=internal' <<<"$magic" ||
+  fail "external Magic Trackpad is not classified as internal" "$magic"
+pass "external Magic Trackpad stays outside the T2 override"
+
+# Existing installs are repaired by a new migration, and rerunning it after the
+# file is current must be a no-op.
+stub_bin="$test_tmp/bin"
+calls="$test_tmp/calls.log"
+target_hwdb="$test_tmp/etc/udev/hwdb.d/71-omarchy-t2-trackpad.hwdb"
+mkdir -p "$stub_bin"
+: >"$calls"
+
+cat >"$stub_bin/lspci" <<'SH'
+#!/bin/bash
+if (( ${T2_HARDWARE:-0} == 1 )); then
+  echo '01:00.0 Bridge [0680]: Apple Inc. T2 Security Chip [106b:1801]'
+else
+  echo '00:00.0 Host bridge [0600]: Example [ffff:0000]'
+fi
+SH
+
+cat >"$stub_bin/sudo" <<'SH'
+#!/bin/bash
+printf 'sudo' >>"$TEST_LOG"
+printf '\t%s' "$@" >>"$TEST_LOG"
+printf '\n' >>"$TEST_LOG"
+"$@"
+SH
+
+cat >"$stub_bin/systemd-hwdb" <<'SH'
+#!/bin/bash
+printf 'systemd-hwdb' >>"$TEST_LOG"
+printf '\t%s' "$@" >>"$TEST_LOG"
+printf '\n' >>"$TEST_LOG"
+SH
+
+cat >"$stub_bin/udevadm" <<'SH'
+#!/bin/bash
+printf 'udevadm' >>"$TEST_LOG"
+printf '\t%s' "$@" >>"$TEST_LOG"
+printf '\n' >>"$TEST_LOG"
+SH
+
+chmod +x "$stub_bin"/*
+
+run_migration() {
+  PATH="$stub_bin:$PATH" \
+    TEST_LOG="$calls" \
+    T2_HARDWARE="$1" \
+    OMARCHY_PATH="$ROOT" \
+    OMARCHY_T2_TRACKPAD_HWDB="$target_hwdb" \
+    bash -euo pipefail "$migration" >/dev/null
+}
+
+run_migration 1
+cmp -s "$hwdb" "$target_hwdb" ||
+  fail "T2 migration installs the exact shipped hwdb rule"
+grep -Fq $'systemd-hwdb\tupdate' "$calls" ||
+  fail "T2 migration recompiles the hwdb" "$(cat "$calls")"
+grep -Fq $'udevadm\ttrigger\t--subsystem-match=input\t--action=change' "$calls" ||
+  fail "T2 migration retriggers input devices" "$(cat "$calls")"
+pass "T2 migration repairs existing installs"
+
+: >"$calls"
+run_migration 1
+[[ ! -s $calls ]] ||
+  fail "T2 migration is idempotent once the rule is current" "$(cat "$calls")"
+pass "T2 migration leaves an already-current rule alone"
+
+rm -f "$target_hwdb"
+: >"$calls"
+run_migration 0
+[[ ! -e $target_hwdb ]] ||
+  fail "non-T2 systems do not receive the trackpad override"
+[[ ! -s $calls ]] ||
+  fail "non-T2 systems skip hwdb activation" "$(cat "$calls")"
+pass "T2 migration skips unrelated hardware"