[OE-core] [PATCH v2] package_rpm: Add custom extension support for spec generation.

[Richard Purdie]

Add hooks to allow customisation of the rpm spec files. Since python functions
aren't visible in the data store, one variable is used to trigger the call to
a separately named function. A dummy function is not provided since this then
triggers various class ordering complexities which are best avoided.

Ultimately this will be replaced by a refactor of the code to generate the 
spec file using a python class.

This allows the tizen layer to add hooks for the security manifests for
example.

Signed-off-by: Richard Purdie <richard.purdie at linuxfoundation.org>

diff --git a/meta/classes/package_rpm.bbclass b/meta/classes/package_rpm.bbclass
index eecfcb2..ac69b68 100644
--- a/meta/classes/package_rpm.bbclass
+++ b/meta/classes/package_rpm.bbclass
@@ -306,6 +306,7 @@ python write_specfile () {
     spec_files_bottom = []
 
     perfiledeps = (d.getVar("MERGEPERFILEDEPS", True) or "0") == "0"
+    extra_pkgdata = (d.getVar("RPM_EXTRA_PKGDATA", True) or "0") == "0"
 
     for pkg in packages.split():
         localdata = bb.data.createCopy(d)
@@ -389,6 +390,8 @@ python write_specfile () {
             else:
                 bb.note("Creating RPM package for %s" % splitname)
                 spec_files_top.append('%files')
+                if extra_pkgdata:
+                    package_rpm_extra_pkgdata(splitname, spec_files_top, localdata)
                 spec_files_top.append('%defattr(-,-,-,-)')
                 if file_list:
                     bb.note("Creating RPM package for %s" % splitname)
@@ -495,6 +498,8 @@ python write_specfile () {
             bb.note("Not creating empty RPM package for %s" % splitname)
         else:
             spec_files_bottom.append('%%files -n %s' % splitname)
+            if extra_pkgdata:
+                package_rpm_extra_pkgdata(splitname, spec_files_bottom, localdata)
             spec_files_bottom.append('%defattr(-,-,-,-)')
             if file_list:
                 bb.note("Creating RPM package for %s" % splitname)