[PATCH] tests/vm: allow running tests in an unconfigured source tree

[Paolo Bonzini]

tests/vm/Makefile.include used to assume that it could run in an unconfigured
source tree, and Cirrus CI relies on that.  It was however broken by commit
f4c66f1705 ("tests: use tests/venv to run basevm.py-based scripts", 2022-06-06),
which co-opted the virtual environment being used by avocado tests
to also run the basevm.py tests.

For now, reintroduce the usage of qemu.qmp from the source directory, but
without the sys.path() hacks.  The CI configuration can be changed to
install the package via pip when qemu.qmp is removed from the source tree.

Cc: John Snow <jsnow@redhat.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
---
 tests/vm/Makefile.include | 26 +++++++++++++++++---------
 1 file changed, 17 insertions(+), 9 deletions(-)

diff --git a/tests/vm/Makefile.include b/tests/vm/Makefile.include
index 588bc999cc..5f5b1fbfe6 100644
--- a/tests/vm/Makefile.include
+++ b/tests/vm/Makefile.include
@@ -1,8 +1,17 @@
 # Makefile for VM tests
 
-.PHONY: vm-build-all vm-clean-all
+# Hack to allow running in an unconfigured build tree
+ifeq ($(wildcard $(SRC_PATH)/config-host.mak),)
+VM_PYTHON = PYTHONPATH=$(SRC_PATH)/python /usr/bin/env python3
+VM_VENV =
+HOST_ARCH := $(shell uname -m)
+else
+VM_PYTHON = $(TESTS_PYTHON)
+VM_VENV = check-venv
+HOST_ARCH = $(ARCH)
+endif
 
-HOST_ARCH = $(if $(ARCH),$(ARCH),$(shell uname -m))
+.PHONY: vm-build-all vm-clean-all
 
 EFI_AARCH64 = $(wildcard $(BUILD_DIR)/pc-bios/edk2-aarch64-code.fd)
 
@@ -85,10 +94,10 @@ vm-clean-all:
 $(IMAGES_DIR)/%.img:   $(SRC_PATH)/tests/vm/% \
                        $(SRC_PATH)/tests/vm/basevm.py \
                        $(SRC_PATH)/tests/vm/Makefile.include \
-                       check-venv
+                       $(VM_VENV)
        @mkdir -p $(IMAGES_DIR)
        $(call quiet-command, \
-               $(TESTS_PYTHON) $< \
+               $(VM_PYTHON) $< \
                $(if $(V)$(DEBUG), --debug) \
                $(if $(GENISOIMAGE),--genisoimage $(GENISOIMAGE)) \
                $(if $(QEMU_LOCAL),--build-path $(BUILD_DIR)) \
@@ -100,11 +109,10 @@ $(IMAGES_DIR)/%.img:      $(SRC_PATH)/tests/vm/% \
                --build-image $@, \
                "  VM-IMAGE $*")
 
-
 # Build in VM $(IMAGE)
-vm-build-%: $(IMAGES_DIR)/%.img check-venv
+vm-build-%: $(IMAGES_DIR)/%.img $(VM_VENV)
        $(call quiet-command, \
-               $(TESTS_PYTHON) $(SRC_PATH)/tests/vm/$* \
+               $(VM_PYTHON) $(SRC_PATH)/tests/vm/$* \
                $(if $(V)$(DEBUG), --debug) \
                $(if $(DEBUG), --interactive) \
                $(if $(J),--jobs $(J)) \
@@ -128,9 +136,9 @@ vm-boot-serial-%: $(IMAGES_DIR)/%.img
                -device virtio-net-pci,netdev=vnet \
        || true
 
-vm-boot-ssh-%: $(IMAGES_DIR)/%.img check-venv
+vm-boot-ssh-%: $(IMAGES_DIR)/%.img $(VM_VENV)
        $(call quiet-command, \
-               $(TESTS_PYTHON) $(SRC_PATH)/tests/vm/$* \
+               $(VM_PYTHON) $(SRC_PATH)/tests/vm/$* \
                $(if $(J),--jobs $(J)) \
                $(if $(V)$(DEBUG), --debug) \
                $(if $(QEMU_LOCAL),--build-path $(BUILD_DIR)) \
-- 
2.36.1