Move source uncompress logic from spec parse to build time

Traditionally, %setup processing has figured out the commands needed
to extract the source in question. The problem with this is that it
happens at spec parse time, requiring access to sources that may not
even be there in plain spec queries.

Move the unpack logic from %setup internals to an `rpmuncompress` helper
executable which is now the only command %setup needs to know. This way,
spec parsing never needs to look at the actual source files, their
presence is only required for an actual build. Another advantage is
that the extraction machinery is now available to packagers without having
to call %setup with its side-effects on %buildsubdir and such.

Split the rpmbuild -ba test on missing sources into separate -bb and -bs
tests as these are now rather different: binary build only tests for
source presence if %prep is actually executed, and missing files
at source build stage are discovered at a later stage as well.

1 files changed, 1 insertions, 0 deletions

diff --git a/macros.in b/macros.in
index 6177e6fec..99857b9e1 100644
--- a/macros.in
+++ b/macros.in
@@ -67,6 +67,7 @@
 %__ld			@__LD@
 %__objdump		@__OBJDUMP@
 %__strip		@__STRIP@
+%__rpmuncompress	%{_rpmconfigdir}/rpmuncompress
 
 %__find_debuginfo	@__FIND_DEBUGINFO@