makepkg: use --apparent-size when du supports it

Amazingly, using "sleep 1" to convince btrfs to report correct file
sizes is only a 90% fix.  Sometimes more sleep is needed.

Instead we use the --apparent-size argument to du to get actual file
sizes. This is used only on Linux as the various BSDs do not support
this argument.

Signed-off-by: Allan McRae <allan@archlinux.org>

configure.ac

@@ -300,6 +300,7 @@ GCC_GNU89_INLINE_CC
 INODECMD="stat -c '%i %n'"
 SIZECMD="stat -c %s"
 SEDINPLACE="sed -i"
+DUFLAGS="-sk --apparent-size"
 STRIP_BINARIES="--strip-all"
 STRIP_SHARED="--strip-unneeded"
 STRIP_STATIC="--strip-debug"
@@ -308,12 +309,14 @@ case "${host_os}" in
 		INODECMD="stat -f '%i %n'"
 		SIZECMD="stat -f %z"
 		SEDINPLACE="sed -i \"\""
+		DUFLAGS="-sk"
 		;;
 	darwin*)
 		host_os_darwin=yes
 		INODECMD="/usr/bin/stat -f '%i %n'"
 		SIZECMD="/usr/bin/stat -f %z"
 		SEDINPLACE="/usr/bin/sed -i ''"
+		DUFLAGS="-sk"
 		STRIP_BINARIES=""
 		STRIP_SHARED="-S"
 		STRIP_STATIC="-S"
@@ -325,6 +328,7 @@ AC_PATH_PROGS([DUPATH], [du], [du], [/usr/bin$PATH_SEPARATOR/bin] )
 AC_SUBST(INODECMD)
 AC_SUBST(SIZECMD)
 AC_SUBST(SEDINPLACE)
+AC_SUBST(DUFLAGS)
 AC_SUBST(STRIP_BINARIES)
 AC_SUBST(STRIP_SHARED)
 AC_SUBST(STRIP_STATIC)

scripts/Makefile.am

@@ -57,6 +57,7 @@ edit = sed \
 	-e "s|@INODECMD[@]|$(INODECMD)|g" \
 	-e 's|@SIZECMD[@]|$(SIZECMD)|g' \
 	-e 's|@SEDINPLACE[@]|$(SEDINPLACE)|g' \
+	-e 's|@DUFLAGS[@]|$(DUFLAGS)|g' \
 	-e 's|@DUPATH[@]|$(DUPATH)|g' \
 	-e 's|@SCRIPTNAME[@]|$@|g' \
 	-e 's|@configure_input[@]|Generated from $@.sh.in; do not edit by hand.|g'

scripts/makepkg.sh.in

@@ -1704,12 +1704,7 @@ write_pkginfo() {
 		local packager="Unknown Packager"
 	fi
 
-	# btrfs's delayed allocation causes the stat buffers from the kernel to "lie"
-	# to us momentarily and report 0 blocks allocated (which is how du calculates
-	# size). Sleeping for a second here is about the dirtiest thing possible,
-	# but avoids reporting entirely bogus install sizes.
-	sleep 1
-	local size="$(@DUPATH@ -sk)"
+	local size="$(@DUPATH@ @DUFLAGS@)"
 	size="$(( ${size%%[^0-9]*} * 1024 ))"
 
 	msg2 "$(gettext "Generating %s file...")" ".PKGINFO"