Build default.vlt in a reproducible fashion (fixes #4562)

gzip was including a timestamp, and tar was enumerating files in an
unspecified/variable order.

Signed-off-by: Rémi Denis-Courmont <remi@remlab.net>
(+ minor modifiations)

diff --git a/share/Makefile.am b/share/Makefile.am
index fb9d776470a91532cfa53e5d52e6b7c8db3136bc..5aeb844ac715e225ced3a66f55a31d55cbecc485 100644 (file)
--- a/share/Makefile.am
+++ b/share/Makefile.am
@@ -82,7 +82,10 @@ skins2_default_vlt_FILES = \
 
 skins2/default.vlt: $(skins2_default_vlt_FILES)
        mkdir -p skins2
-       tar cvvzf skins2/default.vlt -C $(srcdir)/skins2 default/
+       (cd "$(srcdir)/skins2"; find default -print0 | \
+               LC_ALL=C sort -z | \
+               tar cvv --exclude .svn --no-recursion --null -T -) | \
+       gzip -n > skins2/default.vlt
 
 DIST_http = \
        http/.hosts \