add option to optimize PNG images with optipng

This can decrease package size by optimizing PNG image size. Images are
just stored with better compression and/or filter options. The actual
image content is not altered.

Additionally this can automatically fix broken PNG images which caused
some trouble lately.

Signed-off-by: Christian Hesse <mail@eworm.de>
Signed-off-by: Allan McRae <allan@archlinux.org>

1 files changed, 3 insertions, 2 deletions

diff --git a/etc/makepkg.conf.in b/etc/makepkg.conf.in
index 19f673d1..71ec624b 100644
--- a/etc/makepkg.conf.in
+++ b/etc/makepkg.conf.in
@@ -71,7 +71,7 @@ BUILDENV=(!distcc color !ccache check !sign)
 #   These are default values for the options=() settings
 #########################################################################
 #
-# Default: OPTIONS=(strip docs libtool staticlibs emptydirs zipman purge !upx !debug)
+# Default: OPTIONS=(strip docs libtool staticlibs emptydirs zipman purge !upx !optipng !debug)
 #  A negated option will do the opposite of the comments below.
 #
 #-- strip:      Strip symbols from binaries/libraries
@@ -82,9 +82,10 @@ BUILDENV=(!distcc color !ccache check !sign)
 #-- zipman:     Compress manual (man and info) pages in MAN_DIRS with gzip
 #-- purge:      Remove files specified by PURGE_TARGETS
 #-- upx:        Compress binary executable files using UPX
+#-- optipng:    Optimize PNG images with optipng
 #-- debug:      Add debugging flags as specified in DEBUG_* variables
 #
-OPTIONS=(strip docs libtool staticlibs emptydirs zipman purge !upx !debug)
+OPTIONS=(strip docs libtool staticlibs emptydirs zipman purge !upx !optipng !debug)
 
 #-- File integrity checks to use. Valid: md5, sha1, sha256, sha384, sha512
 INTEGRITY_CHECK=(md5)