[gnome-continuous-yocto/gnomeostree-3.28-rocko: 2608/8267] oeqa/selftest/base: backup and restore local configuration files

[Emmanuele Bassi <ebassi src gnome org>]

commit c902e7b93700e56245d8f04397ff01fa278183a3
Author: Jose Lamego <jose a lamego linux intel com>
Date:   Wed Sep 21 12:54:59 2016 -0700

    oeqa/selftest/base: backup and restore local configuration files
    
    Selftests' cleanup method during test setup is not capable of
    restoring local configuration files that remain modified after
    aborting a test through a keyboard interruption.
    This change creates backups for local.conf and bblayers.conf at
    test setup, restore them when found, and deletes them at cleanup.
    
    [YOCTO #9390]
    
    (From OE-Core rev: 0877278e07e4c2494c4c23199490dc47a5cee69d)
    
    Signed-off-by: Jose Lamego <jose a lamego linux intel com>
    Signed-off-by: Ross Burton <ross burton intel com>
    Signed-off-by: Richard Purdie <richard purdie linuxfoundation org>

 meta/lib/oeqa/selftest/base.py |   32 +++++++++++++++++++++++++++++++-
 1 files changed, 31 insertions(+), 1 deletions(-)
---
diff --git a/meta/lib/oeqa/selftest/base.py b/meta/lib/oeqa/selftest/base.py
index b5a52fe..26c93f9 100644
--- a/meta/lib/oeqa/selftest/base.py
+++ b/meta/lib/oeqa/selftest/base.py
@@ -28,17 +28,47 @@ class oeSelfTest(unittest.TestCase):
     def __init__(self, methodName="runTest"):
         self.builddir = os.environ.get("BUILDDIR")
         self.localconf_path = os.path.join(self.builddir, "conf/local.conf")
+        self.localconf_backup = os.path.join(self.builddir, "conf/local.bk")
         self.testinc_path = os.path.join(self.builddir, "conf/selftest.inc")
         self.local_bblayers_path = os.path.join(self.builddir, "conf/bblayers.conf")
+        self.local_bblayers_backup = os.path.join(self.builddir,
+                                                  "conf/bblayers.bk")
         self.testinc_bblayers_path = os.path.join(self.builddir, "conf/bblayers.inc")
         self.machineinc_path = os.path.join(self.builddir, "conf/machine.inc")
         self.testlayer_path = oeSelfTest.testlayer_path
         self._extra_tear_down_commands = []
-        self._track_for_cleanup = [self.testinc_path, self.testinc_bblayers_path, self.machineinc_path]
+        self._track_for_cleanup = [
+            self.testinc_path, self.testinc_bblayers_path,
+            self.machineinc_path, self.localconf_backup,
+            self.local_bblayers_backup]
         super(oeSelfTest, self).__init__(methodName)
 
     def setUp(self):
         os.chdir(self.builddir)
+        # Check if local.conf or bblayers.conf files backup exists
+        # from a previous failed test and restore them
+        if os.path.isfile(self.localconf_backup) or os.path.isfile(
+                self.local_bblayers_backup):
+            self.log.debug("Found a local.conf and/or bblayers.conf backup \
+from a previously aborted test. Restoring these files now, but tests should \
+be re-executed from a clean environment to ensure accurate results.")
+            try:
+                shutil.copyfile(self.localconf_backup, self.localconf_path)
+            except OSError as e:
+                if e.errno != errno.ENOENT:
+                    raise
+            try:
+                shutil.copyfile(self.local_bblayers_backup,
+                                self.local_bblayers_path)
+            except OSError as e:
+                if e.errno != errno.ENOENT:
+                    raise
+        else:
+            # backup local.conf and bblayers.conf
+            shutil.copyfile(self.localconf_path, self.localconf_backup)
+            shutil.copyfile(self.local_bblayers_path,
+                            self.local_bblayers_backup)
+            self.log.debug("Creating local.conf and bblayers.conf backups.")
         # we don't know what the previous test left around in config or inc files
         # if it failed so we need a fresh start
         try: