[OE-core] [PATCH] classes/buildhistory: avoid buildhistory triggering rebuilds (again)

[Paul Eggleton]

Postfuncs are now incorporated into task signatures as of BitBake
rev b84d010144de687667cf855ddcb41c9b863c236e, so we need to exclude
the one we're adding to do_fetch. The change to the SSTATEPOSTINSTFUNCS
variable value was also entering the signatures of do_populate_sysroot
and probably other tasks, so we need to use a slightly hacky trick to
avoid that as well.

Apart from the final do_rootfs / do_populate_sysroot, this now means
that adding and removing INHERIT += "buildhistory" will not cause tasks
to be re-run.

Also update the copyright date, properly this time.

Signed-off-by: Paul Eggleton <paul.eggleton at linux.intel.com>
---
 meta/classes/buildhistory.bbclass | 5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

diff --git a/meta/classes/buildhistory.bbclass b/meta/classes/buildhistory.bbclass
index 6d1e74a..c048ca2 100644
--- a/meta/classes/buildhistory.bbclass
+++ b/meta/classes/buildhistory.bbclass
@@ -3,7 +3,7 @@
 #
 # Based in part on testlab.bbclass and packagehistory.bbclass
 #
-# Copyright (C) 2013 Intel Corporation
+# Copyright (C) 2011-2014 Intel Corporation
 # Copyright (C) 2007-2011 Koen Kooi <koen at openembedded.org>
 #
 
@@ -18,6 +18,8 @@ BUILDHISTORY_COMMIT_AUTHOR ?= "buildhistory <buildhistory@${DISTRO}>"
 BUILDHISTORY_PUSH_REPO ?= ""
 
 SSTATEPOSTINSTFUNCS += "buildhistory_emit_pkghistory"
+# We want to avoid influence the signatures of sstate tasks
+SSTATEPOSTINSTFUNCS[vardepvalue] := "${@d.getVar('SSTATEPOSTINSTFUNCS', False).replace(' buildhistory_emit_pkghistory', '')}"
 
 #
 # Write out metadata about this package for comparision when writing future packages
@@ -595,6 +597,7 @@ def _get_srcrev_values(d):
     return (dict_srcrevs, dict_tag_srcrevs)
 
 do_fetch[postfuncs] += "write_srcrev"
+do_fetch[vardepsexclude] += "write_srcrev"
 python write_srcrev() {
     pkghistdir = d.getVar('BUILDHISTORY_DIR_PACKAGE', True)
     srcrevfile = os.path.join(pkghistdir, 'latest_srcrev')
-- 
1.8.5.3