[PATCH 5/6] Acceptance Tests: distinguish between temp and logs dir

[Cleber Rosa]

Logs can be very important to debug issues, and currently QEMUMachine
instances will remove logs that are created under the temporary
directories.

With this change, the stdout and stderr generated by the QEMU process
started by QEMUMachine will always be kept along the test results
directory.

Signed-off-by: Cleber Rosa <crosa@redhat.com>
---
 python/qemu/machine.py                    | 16 ++++++++++++++--
 tests/acceptance/avocado_qemu/__init__.py |  3 ++-
 2 files changed, 16 insertions(+), 3 deletions(-)

diff --git a/python/qemu/machine.py b/python/qemu/machine.py
index b379fcbe72..1f4119e2b4 100644
--- a/python/qemu/machine.py
+++ b/python/qemu/machine.py
@@ -89,7 +89,8 @@ class QEMUMachine:
                  socket_scm_helper: Optional[str] = None,
                  sock_dir: Optional[str] = None,
                  drain_console: bool = False,
-                 console_log: Optional[str] = None):
+                 console_log: Optional[str] = None,
+                 log_dir: Optional[str] = None):
         '''
         Initialize a QEMUMachine
 
@@ -103,6 +104,7 @@ class QEMUMachine:
         @param sock_dir: where to create socket (defaults to base_temp_dir)
         @param drain_console: (optional) True to drain console socket to buffer
         @param console_log: (optional) path to console log file
+        @param log_dir: where to create and keep log files
         @note: Qemu process is not started until launch() is used.
         '''
         # Direct user configuration
@@ -114,6 +116,7 @@ class QEMUMachine:
         self._name = name or "qemu-%d" % os.getpid()
         self._base_temp_dir = base_temp_dir
         self._sock_dir = sock_dir or self._base_temp_dir
+        self._log_dir = log_dir
         self._socket_scm_helper = socket_scm_helper
 
         if monitor_address is not None:
@@ -303,7 +306,7 @@ class QEMUMachine:
         return args
 
     def _pre_launch(self) -> None:
-        self._qemu_log_path = os.path.join(self.temp_dir, self._name + ".log")
+        self._qemu_log_path = os.path.join(self.log_dir, self._name + ".log")
         self._qemu_log_file = open(self._qemu_log_path, 'wb')
 
         if self._console_set:
@@ -752,3 +755,12 @@ class QEMUMachine:
             self._temp_dir = tempfile.mkdtemp(prefix="qemu-machine-",
                                               dir=self._base_temp_dir)
         return self._temp_dir
+
+    @property
+    def log_dir(self) -> str:
+        """
+        Returns a directory to be used for writing logs
+        """
+        if self._log_dir is None:
+            return self.temp_dir
+        return self._log_dir
diff --git a/tests/acceptance/avocado_qemu/__init__.py 
b/tests/acceptance/avocado_qemu/__init__.py
index 94b78fd7c8..ac9be1eb66 100644
--- a/tests/acceptance/avocado_qemu/__init__.py
+++ b/tests/acceptance/avocado_qemu/__init__.py
@@ -173,9 +173,10 @@ class Test(avocado.Test):
     def _new_vm(self, name, *args):
         self._sd = tempfile.TemporaryDirectory(prefix="avo_qemu_sock_")
         vm = QEMUMachine(self.qemu_bin, base_temp_dir=self.workdir,
-                         sock_dir=self._sd.name)
+                         sock_dir=self._sd.name, log_dir=self.logdir)
         self.log.debug('QEMUMachine "%s" created', name)
         self.log.debug('QEMUMachine "%s" temp_dir: %s', name, vm.temp_dir)
+        self.log.debug('QEMUMachine "%s" log_dir: %s', name, vm.log_dir)
         if args:
             vm.add_args(*args)
         return vm
-- 
2.25.4