From fd5eef85fed024387d41adc4f7ca502c14ff62be Mon Sep 17 00:00:00 2001
From: Paolo Bonzini <pbonzini@redhat.com>
Date: Wed, 16 Sep 2020 05:00:53 -0400
Subject: [PATCH] meson: qtest: set "depends" correctly

This does not have any effect on Meson's behavior itself, since "meson test"
always rebuilds everything (that is one reason why we are not using it...).
However, mtest2make can use this information to do a selective rebuild
for the requested suite.

Cc: Thomas Huth <thuth@redhat.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
---
 meson.build             | 7 ++++---
 tests/qtest/meson.build | 8 +++++++-
 2 files changed, 11 insertions(+), 4 deletions(-)

diff --git a/meson.build b/meson.build
index 34d4ff96aa..32f614b3dd 100644
--- a/meson.build
+++ b/meson.build
@@ -1103,7 +1103,7 @@ common_all = static_library('common',
 
 feature_to_c = find_program('scripts/feature_to_c.sh')
 
-emulators = []
+emulators = {}
 foreach target : target_dirs
   config_target = config_target_mak[target]
   target_name = config_target['TARGET_NAME']
@@ -1222,7 +1222,8 @@ foreach target : target_dirs
     }]
   endif
   foreach exe: execs
-    emulators += executable(exe['name'], exe['sources'],
+    emulators += {exe['name']:
+         executable(exe['name'], exe['sources'],
                install: true,
                c_args: c_args,
                dependencies: arch_deps + deps + exe['dependencies'],
@@ -1231,6 +1232,7 @@ foreach target : target_dirs
                link_depends: [block_syms, qemu_syms] + exe.get('link_depends', []),
                link_args: link_args,
                gui_app: exe['gui'])
+    }
 
     if 'CONFIG_TRACE_SYSTEMTAP' in config_host
       foreach stp: [
@@ -1276,7 +1278,6 @@ if xkbcommon.found()
                            dependencies: [qemuutil, xkbcommon], install: have_tools)
 endif
 
-qemu_block_tools = []
 if have_tools
   qemu_img = executable('qemu-img', [files('qemu-img.c'), hxdep],
              dependencies: [authz, block, crypto, io, qom, qemuutil], install: true)
diff --git a/tests/qtest/meson.build b/tests/qtest/meson.build
index 874b5be62b..4f7757ee93 100644
--- a/tests/qtest/meson.build
+++ b/tests/qtest/meson.build
@@ -228,10 +228,15 @@ foreach dir : target_dirs
   endif
 
   target_base = dir.split('-')[0]
+  qtest_emulator = emulators['qemu-system-' + target_base]
   qtests = get_variable('qtests_' + target_base, []) + qtests_generic
 
+  test_deps = []
   qtest_env = environment()
-  qtest_env.set('QTEST_QEMU_IMG', './qemu-img')
+  if have_tools
+    qtest_env.set('QTEST_QEMU_IMG', './qemu-img')
+    test_deps += [qemu_img]
+  endif
   qtest_env.set('G_TEST_DBUS_DAEMON', meson.source_root() / 'tests/dbus-vmstate-daemon.sh')
   qtest_env.set('QTEST_QEMU_BINARY', './qemu-system-' + target_base)
   
@@ -248,6 +253,7 @@ foreach dir : target_dirs
     # FIXME: missing dependency on the emulator binary and qemu-img
     test('qtest-@0@: @1@'.format(target_base, test),
          qtest_executables[test],
+         depends: [test_deps, qtest_emulator],
          env: qtest_env,
          args: ['--tap', '-k'],
          protocol: 'tap',