package_{ipk, deb, rpm}.bbclass: support additional user-defined metadata

Additional metadata from user-defined variable is written into
control/spec file of binary package.

Three variables are searched for adiitional package metadata:

  * PACKAGE_ADD_METADATA_<PKGTYPE>_<PN>
  * PACKAGE_ADD_METADATA_<PKGTYPE>
  * PACKAGE_ADD_METADATA

First found variable with defined value wins.

<PN> is a package name. <PKGTYPE> is a distinct name of specific
package type:

  * IPK for .ipk packages
  * DEB for .deb packages
  * RPM for .rpm packages

Variable can contain multiple [one-line] metadata fields separated by
literal sequence '\n'. Separator can be redefined through variable flag
'separator'. In package control/spec file separator is replaced by
newline character.

(From OE-Core rev: 773d7352309241e15ef5acadcbe416bdd7d45c18)

Signed-off-by: Leonid Borisenko <ive.found@gmail.com>
Signed-off-by: Martin Jansa <Martin.Jansa@gmail.com>
Signed-off-by: Saul Wold <sgw@linux.intel.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>

meta/classes/package_deb.bbclass

@@ -318,6 +318,11 @@ python do_package_deb () {
             raise bb.build.FuncFailed("Missing field for deb generation: %s" % value)
         # more fields
 
+        custom_fields_chunk = get_package_additional_metadata("deb", localdata)
+        if custom_fields_chunk is not None:
+            ctrlfile.write(unicode(custom_fields_chunk))
+            ctrlfile.write("\n")
+
         mapping_rename_hook(localdata)
 
         def debian_cmp_remap(var):

meta/classes/package_ipk.bbclass

@@ -331,6 +331,11 @@ python do_package_ipk () {
             raise bb.build.FuncFailed("Missing field for ipk generation: %s" % value)
         # more fields
 
+        custom_fields_chunk = get_package_additional_metadata("ipk", localdata)
+        if custom_fields_chunk is not None:
+            ctrlfile.write(custom_fields_chunk)
+            ctrlfile.write("\n")
+
         mapping_rename_hook(localdata)
 
         def debian_cmp_remap(var):

meta/classes/package_rpm.bbclass

@@ -737,6 +737,7 @@ python write_specfile () {
     srcmaintainer  = d.getVar('MAINTAINER', True)
     srchomepage    = d.getVar('HOMEPAGE', True)
     srcdescription = d.getVar('DESCRIPTION', True) or "."
+    srccustomtagschunk = get_package_additional_metadata("rpm", d)
 
     srcdepends     = strip_multilib_deps(d.getVar('DEPENDS', True), d)
     srcrdepends    = []
@@ -790,6 +791,7 @@ python write_specfile () {
         splitlicense = (localdata.getVar('LICENSE', True) or "")
         splitsection = (localdata.getVar('SECTION', True) or "")
         splitdescription = (localdata.getVar('DESCRIPTION', True) or ".")
+        splitcustomtagschunk = get_package_additional_metadata("rpm", localdata)
 
         translate_vers('RDEPENDS', localdata)
         translate_vers('RRECOMMENDS', localdata)
@@ -863,6 +865,9 @@ python write_specfile () {
             spec_preamble_bottom.append('License: %s' % splitlicense)
         spec_preamble_bottom.append('Group: %s' % splitsection)
 
+        if srccustomtagschunk != splitcustomtagschunk:
+            spec_preamble_bottom.append(splitcustomtagschunk)
+
         # Replaces == Obsoletes && Provides
         robsoletes = bb.utils.explode_dep_versions2(splitrobsoletes or "")
         rprovides = bb.utils.explode_dep_versions2(splitrprovides or "")
@@ -965,6 +970,8 @@ python write_specfile () {
     spec_preamble_top.append('Group: %s' % srcsection)
     spec_preamble_top.append('Packager: %s' % srcmaintainer)
     spec_preamble_top.append('URL: %s' % srchomepage)
+    if srccustomtagschunk:
+        spec_preamble_top.append(srccustomtagschunk)
     tail_source(d)
 
     # Replaces == Obsoletes && Provides