[Reproducible-builds] Bug#832998: live-build: please expose SOURCE_DATE_EPOCH when running chroot commands

[Chris Lamb]

Source: live-build
Version: 1:20151215
Severity: wishlist
Tags: patch
X-Debbugs-Cc: reproducible-builds at lists.alioth.debian.org

Hi,

The attached patch exposes the SOURCE_DATE_EPOCH variable when running
scripts inside the chroot, otherwise the chroot operation resets the
environment.

This is needed to generate reproducible images when using the S_D_E
patchset for libisofs and libisoburn.


Regards,

-- 
      ,''`.
     : :'  :     Chris Lamb
     `. `'`      lamby at debian.org / chris-lamb.co.uk
       `-
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diff --git a/functions/chroot.sh b/functions/chroot.sh
index 23c5046..88c5466 100755
--- a/functions/chroot.sh
+++ b/functions/chroot.sh
@@ -26,6 +26,12 @@ Chroot ()
 		fi
 	done
 
+	# Only pass SOURCE_DATE_EPOCH if its already set
+	if [ "${SOURCE_DATE_EPOCH:-}" != "" ]
+	then
+		ENV="${ENV} SOURCE_DATE_EPOCH=${SOURCE_DATE_EPOCH}"
+	fi
+
 	${_LINUX32} chroot "${CHROOT}" /usr/bin/env -i HOME="/root" PATH="/usr/local/sbin:/usr/local/bin:/sbin:/bin:/usr/sbin:/usr/bin" TERM="${TERM}" DEBIAN_FRONTEND="${LB_DEBCONF_FRONTEND}" DEBIAN_PRIORITY="${LB_DEBCONF_PRIORITY}" DEBCONF_NONINTERACTIVE_SEEN="true" DEBCONF_NOWARNINGS="true" ${ENV} ${COMMANDS}
 
 	return "${?}"