build: allow for reproducible builds

[vpp.git] / src / pkg / CMakeLists.txt

diff --git a/src/pkg/CMakeLists.txt b/src/pkg/CMakeLists.txt
index d447774..5fa2826 100644 (file)
--- a/src/pkg/CMakeLists.txt
+++ b/src/pkg/CMakeLists.txt
@@ -18,8 +18,23 @@ endif()
 get_cmake_property(VPP_COMPONENTS COMPONENTS)
 string(REPLACE ";" " " VPP_COMPONENTS "${VPP_COMPONENTS}")
 
+##############################################################################
+# pinned timestamp for reproducible builds
+##############################################################################
+set(VPP_SOURCE_DATE_EPOCH
+   ""
+   CACHE
+   STRING "Artifact build timestamp for reproducible builds"
+)
+
+if(VPP_SOURCE_DATE_EPOCH STREQUAL "")
+   set(VPP_TIMESTAMP_ARG "")
+else()
+   set(VPP_TIMESTAMP_ARG "--date=@${VPP_SOURCE_DATE_EPOCH}")
+endif()
+
 execute_process(
-  COMMAND date -R
+  COMMAND date -R ${VPP_TIMESTAMP_ARG}
   OUTPUT_VARIABLE TIMESTAMP
   OUTPUT_STRIP_TRAILING_WHITESPACE
 )
@@ -53,8 +68,6 @@ foreach(f copyright vpp.preinst vpp.postrm vpp.postinst vpp.service)
   )
 endforeach()
 
-file(WRITE ${VPP_BINARY_DIR}/debian/compat "10\n")
-
 add_custom_target(pkg-deb
   COMMENT "Building .deb packages..."
   WORKING_DIRECTORY ${VPP_BINARY_DIR}