tde_create_tarball: Add options to ensure reproducibility.

Signed-off-by: Slávek Banko <slavek.banko@axis.cz>

modules/TDEMacros.cmake

@@ -1951,6 +1951,13 @@ macro( tde_create_tarball )
     string( REGEX REPLACE "^([^\n]*)\n.*" "\\1" TAR_VERSION "${TAR_VERSION}" )
     if( "${TAR_VERSION}" MATCHES "GNU *tar" )
       set( TAR_SETOWNER "--owner=root;--group=root" )
+      set( TAR_REPRODUCIBLE "--pax-option=exthdr.name=%d/PaxHeaders/%f,delete=atime,delete=ctime" )
+      tde_read_src_metadata()
+      if( TDE_PKG_DATETIME )
+        list( APPEND TAR_REPRODUCIBLE --mtime "${TDE_PKG_DATETIME}" )
+      elseif( TDE_SCM_MODULE_DATETIME )
+        list( APPEND TAR_REPRODUCIBLE --mtime "${TDE_SCM_MODULE_DATETIME}" )
+      endif( )
     elseif( "${TAR_VERSION}" MATCHES "bsd *tar" )
       set( TAR_SETOWNER "--uname=root;--gname=root" )
     else( )
@@ -1963,9 +1970,9 @@ macro( tde_create_tarball )
   endif( )
   if( _compression )
     if( "${_compression}" STREQUAL "gzip" )
-      set( _compression "-z" )
+      set( TAR_COMPRESSION "|" ${_compression} "-n" )
     else( )
-      set( _compression "--use-compress-program=\"${_compression}\"" )
+      set( TAR_COMPRESSION "|" ${_compression} )
     endif( )
   endif( )
 
@@ -1976,8 +1983,9 @@ macro( tde_create_tarball )
     DEPENDS "${CMAKE_CURRENT_BINARY_DIR}/${_target}" )
 
   add_custom_command(
-    COMMAND ${TAR_EXECUTABLE} cf ${CMAKE_CURRENT_BINARY_DIR}/${_target}
-        ${_compression} ${TAR_SETOWNER} -- ${_files}
+    COMMAND ${TAR_EXECUTABLE} cf -
+        ${TAR_SETOWNER} ${TAR_REPRODUCIBLE} -- ${_files}
+        ${TAR_COMPRESSION} > ${CMAKE_CURRENT_BINARY_DIR}/${_target}
     WORKING_DIRECTORY "${_sourcedir}"
     OUTPUT  "${CMAKE_CURRENT_BINARY_DIR}/${_target}"
     DEPENDS ${_files_deps}