[gnome-continuous-yocto/gnomeostree-3.28-rocko: 2002/8267] bitbake: bitbake-selftest: introduce BB_TMPDIR_NOCLEAN

[Emmanuele Bassi <ebassi src gnome org>]

commit 9cce855f472b871ef72f7a0bc053937b67097d0c
Author: Markus Lehtonen <markus lehtonen linux intel com>
Date:   Thu Aug 18 19:55:53 2016 +0300

    bitbake: bitbake-selftest: introduce BB_TMPDIR_NOCLEAN
    
    Set this env variable to 'yes' to preserve temporary directories used by
    the fetcher tests. Useful for debugging tests.
    
    (Bitbake rev: 04132b261df9def3a0cff14c93c29b26ff906e8b)
    
    Signed-off-by: Markus Lehtonen <markus lehtonen linux intel com>
    Signed-off-by: Richard Purdie <richard purdie linuxfoundation org>

 bitbake/bin/bitbake-selftest  |    1 +
 bitbake/lib/bb/tests/fetch.py |    5 ++++-
 2 files changed, 5 insertions(+), 1 deletions(-)
---
diff --git a/bitbake/bin/bitbake-selftest b/bitbake/bin/bitbake-selftest
index 25905d7..1e00e33 100755
--- a/bitbake/bin/bitbake-selftest
+++ b/bitbake/bin/bitbake-selftest
@@ -41,6 +41,7 @@ ENV_HELP = """\
 Environment variables:
   BB_SKIP_NETTESTS      set to 'yes' in order to skip tests using network
                         connection
+  BB_TMPDIR_NOCLEAN     set to 'yes' to preserve test tmp directories
 """
 
 class main(unittest.main):
diff --git a/bitbake/lib/bb/tests/fetch.py b/bitbake/lib/bb/tests/fetch.py
index 272078f..e8c416a 100644
--- a/bitbake/lib/bb/tests/fetch.py
+++ b/bitbake/lib/bb/tests/fetch.py
@@ -360,7 +360,10 @@ class FetcherTest(unittest.TestCase):
 
     def tearDown(self):
         os.chdir(self.origdir)
-        bb.utils.prunedir(self.tempdir)
+        if os.environ.get("BB_TMPDIR_NOCLEAN") == "yes":
+            print("Not cleaning up %s. Please remove manually." % self.tempdir)
+        else:
+            bb.utils.prunedir(self.tempdir)
 
 class MirrorUriTest(FetcherTest):