20.02.2018 08:42, Jeff Cody wrote:
On Fri, Feb 16, 2018 at 02:46:35PM -0600, Eric Blake wrote:
On 02/15/2018 07:51 AM, Vladimir Sementsov-Ogievskiy wrote:
Simple way to have auto generated filenames with auto clenup. Like

FilePath but without using 'with' statement and without additional
indentation of the whole test.

Signed-off-by: Vladimir Sementsov-Ogievskiy <vsement...@virtuozzo.com>
  tests/qemu-iotests/iotests.py | 32 ++++++++++++++++++++++++++++++++
  1 file changed, 32 insertions(+)
Jeff, where do we stand on your iotests cleanups?  Is this something you
want to use?

This patch has niceties that my patch does not, in that explicit clean-up is
not required.  This is also a slight design difference; my patch series
explicitly avoided auto-cleanup, so that ./check could handle it, or
(optionally) leave behind all the mouse droppings for later analysis, in the
case of test failure.

Ideally, I'd love clean-up to be optional; if a test fails, I'd like to have
the option of examining all the intermediate files and output of the test
(and once it resides in its own subdir, that is also side-affect free for
the other tests).

Hmm. Now I think explicit clean-up (by ./chek, not by test) is better, at least for just removing any files in TEST_DIR. Now it's often a problem to save test outputs to debug it, and generic way to do it is good idea.. However, it may be cool to combine both variants (so that, file_path will understand the option form Jeff's patches).

Anyway, for now I left this patch as is.

diff --git a/tests/qemu-iotests/iotests.py b/tests/qemu-iotests/iotests.py
index c1302a2f9b..f2d05ca3fd 100644
--- a/tests/qemu-iotests/iotests.py
+++ b/tests/qemu-iotests/iotests.py
@@ -27,6 +27,7 @@ import struct
  import json
  import signal
  import logging
+import atexit
  sys.path.append(os.path.join(os.path.dirname(__file__), '..', '..', 
  import qtest
@@ -250,6 +251,37 @@ class FilePath(object):
          return False
+def file_path_remover():
+    for path in reversed(file_path_remover.paths):
+        try:
+            os.remove(path)
+        except OSError:
+            pass
+def file_path(*names):
+    ''' Another way to get auto-generated filename that cleans itself up.
+    Use it as simple as:
+    img_a, img_b = file_path('a.img', 'b.img')
+    sock = file_path('socket')
+    '''
+    if not hasattr(file_path_remover, 'paths'):
+        file_path_remover.paths = []
+        atexit.register(file_path_remover)
+    paths = []
+    for name in names:
+        filename = '{0}-{1}'.format(os.getpid(), name)
+        path = os.path.join(test_dir, filename)
+        file_path_remover.paths.append(path)
+        paths.append(path)
+    return paths[0] if len(paths) == 1 else paths
  class VM(qtest.QEMUQtestMachine):
      '''A QEMU VM'''

Eric Blake, Principal Software Engineer
Red Hat, Inc.           +1-919-301-3266
Virtualization:  qemu.org | libvirt.org

Best regards,

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