ci: run libusb VM guest commands via --exec script (fix arg mangling) [wip]

Author: Youw

.github/vmrun-libusb.sh

@@ -0,0 +1,25 @@
+#!/bin/sh
+# Guest-side commands for the libusb virtual-device test, run inside a virtme-ng
+# VM (see .github/workflows/libusb-vhid-test.yml). Kept as a file so a complex
+# command line doesn't have to survive vng's argument parser.
+#
+# Runs as root in the guest, with the host filesystem mounted, cwd at the
+# workspace root (which contains the host-built 'build' tree).
+set -x
+
+# The guest's modules.dep may be trimmed; regenerate it so dummy_hcd /
+# raw_gadget (and their dependencies) resolve from the overlaid /lib/modules.
+depmod -a || true
+modprobe dummy_hcd || true
+modprobe raw_gadget || true
+ls -l /dev/raw-gadget || true
+
+ctest --test-dir build --output-on-failure
+rc=$?
+
+echo "=== diag ==="
+lsmod | grep -E "raw_gadget|dummy_hcd|udc" || true
+ls -l /sys/bus/usb/devices/ 2>/dev/null || true
+dmesg | tail -40 || true
+
+echo "VNG_CTEST_EXIT=${rc}"

.github/workflows/libusb-vhid-test.yml

@@ -66,11 +66,9 @@ jobs:
         # guest runs as root with the host fs mounted; load the gadget modules
         # and run the test against the host build tree. vng exit-code
         # propagation varies, so derive pass/fail from a sentinel line.
-        # The full host /lib/modules is overlaid into the guest, but the guest's
-        # modules.dep may be trimmed; regenerate it with depmod so dummy_hcd /
-        # raw_gadget (and their deps) are resolvable, then load and run.
-        vng -v -r "${KIMG}" -- \
-          bash -c 'set -x; depmod -a || true; modprobe dummy_hcd; modprobe raw_gadget; ls -l /dev/raw-gadget || true; ctest --test-dir build --output-on-failure; rc=$?; echo "=== diag ==="; lsmod | grep -E "raw_gadget|dummy_hcd|udc" || true; ls -l /sys/bus/usb/devices/ 2>/dev/null || true; dmesg | tail -30 || true; echo "VNG_CTEST_EXIT=$rc"' \
-          2>&1 | tee vng.log
+        # Boot the kernel in a VM and run the guest script via --exec (vng's
+        # native flag; passing a complex command after '--' gets mangled). The
+        # script loads dummy_hcd/raw_gadget and runs the test (see it for why).
+        vng -v --pwd -r "${KIMG}" --exec "bash hidapisrc/.github/vmrun-libusb.sh" 2>&1 | tee vng.log
         echo "--- VM run result ---"
         grep -q "VNG_CTEST_EXIT=0" vng.log