[PATCH] python-smartpm: use md5 as the digest for rpm_sys channel

[Markus Lehtonen <markus.lehtonen@linux.intel.com>]

Use md5 sum instead of mtime as the "digest" method for rpm_sys channel.
The digest is used to determine if the channel has been updated. It was
found out that mtime was not a reliable digest. On some systems mtime
of the rpm db does not get updated after every transaction if transactions
(smart install / remove commands) are fired in quick succession. As a
consequence smartpm cache and rpm db get out of sync.

[YOCTO #10244]

Signed-off-by: Markus Lehtonen <markus.lehtonen@linux.intel.com>
---
 ...m_sys-use-md5sum-instead-of-mtime-as-the-.patch | 33 ++++++++++++++++++++++
 meta/recipes-devtools/python/python-smartpm_git.bb |  1 +
 2 files changed, 34 insertions(+)
 create mode 100644 meta/recipes-devtools/python/python-smartpm/channels-rpm_sys-use-md5sum-instead-of-mtime-as-the-.patch

diff --git a/meta/recipes-devtools/python/python-smartpm/channels-rpm_sys-use-md5sum-instead-of-mtime-as-the-.patch b/meta/recipes-devtools/python/python-smartpm/channels-rpm_sys-use-md5sum-instead-of-mtime-as-the-.patch
new file mode 100644
index 0000000..00b1d2a
--- /dev/null
+++ b/meta/recipes-devtools/python/python-smartpm/channels-rpm_sys-use-md5sum-instead-of-mtime-as-the-.patch
@@ -0,0 +1,33 @@
+channels/rpm_sys: use md5sum instead of mtime as the digest
+
+Upstream-Status: Pending
+
+Signed-off-by: Markus Lehtonen <markus.lehtonen@linux.intel.com>
+---
+ smart/channels/rpm_sys.py | 3 ++-
+ 1 file changed, 2 insertions(+), 1 deletion(-)
+
+diff --git a/smart/channels/rpm_sys.py b/smart/channels/rpm_sys.py
+index b9fda27..ea7c8a7 100644
+--- a/smart/channels/rpm_sys.py
++++ b/smart/channels/rpm_sys.py
+@@ -24,6 +24,7 @@ from smart.backends.rpm.base import getTS, rpm_join_dbpath
+ from smart.channel import PackageChannel
+ from smart import *
+ import os
++import hashlib
+ 
+ class RPMSysChannel(PackageChannel):
+ 
+@@ -35,7 +36,7 @@ class RPMSysChannel(PackageChannel):
+         dbdir = rpm_join_dbpath(sysconf.get("rpm-root", "/"),
+                             sysconf.get("rpm-dbpath", "var/lib/rpm"))
+         path = os.path.join(dbdir, "Packages")
+-        digest = os.path.getmtime(path)
++        digest = hashlib.md5(open(path, 'rb').read()).hexdigest()
+         if digest == self._digest:
+             return True
+         self.removeLoaders()
+-- 
+2.6.6
+
diff --git a/meta/recipes-devtools/python/python-smartpm_git.bb b/meta/recipes-devtools/python/python-smartpm_git.bb
index 0c26048..861910c 100644
--- a/meta/recipes-devtools/python/python-smartpm_git.bb
+++ b/meta/recipes-devtools/python/python-smartpm_git.bb
@@ -26,6 +26,7 @@ SRC_URI = "\
           file://smart-locale.patch \
           file://smartpm-rpm5-support-check-signatures.patch \
           file://smart-add-deugging-when-targetpath-is-empty.patch \
+          file://channels-rpm_sys-use-md5sum-instead-of-mtime-as-the-.patch \
          "
 
 SRCREV = "407a7eca766431257dcd1da15175cc36a1bb22d0"
-- 
2.6.6