[PATCH] sanity: Don't make assumptions about cwd

[Richard Purdie <richard.purdie@linuxfoundation.org>]

When using the recently fixed out of build directory bitbake invocations, I was
puzzled why bitbake seemed to be pausing. The reason was due to running the sanity
tests each and every time. This was due to current working directory assumptions
within the sanity test code. Fix this to use TOPDIR.

Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>
---
diff --git a/meta/classes/sanity.bbclass b/meta/classes/sanity.bbclass
index 4df3ca8..feffed9 100644
--- a/meta/classes/sanity.bbclass
+++ b/meta/classes/sanity.bbclass
@@ -694,7 +694,7 @@ def check_sanity(sanity_data):
     last_sanity_version = 0
     last_tmpdir = ""
     last_sstate_dir = ""
-    sanityverfile = 'conf/sanity_info'
+    sanityverfile = sanity_data.expand("${TOPDIR}/conf/sanity_info")
     if os.path.exists(sanityverfile):
         with open(sanityverfile, 'r') as f:
             for line in f:
@@ -715,7 +715,8 @@ def check_sanity(sanity_data):
     else: 
         if last_sstate_dir != sstate_dir:
             status.addresult(check_sanity_sstate_dir_change(sstate_dir, sanity_data))
-    if os.path.exists("conf") and not status.messages:
+
+    if os.path.exists(os.path.dirname(sanityverfile)) and not status.messages:
         with open(sanityverfile, 'w') as f:
             f.write("SANITY_VERSION %s\n" % sanity_version) 
             f.write("TMPDIR %s\n" % tmpdir)