Factor shell script size command into configure script

Commit 149839c539 introduced a small behavior regression as a drawback
for a better portability. repo-add now includes the approximate size (to the
nearest KB) rather than an exact size due to the switching of the du command
to a more portable form. Instead of sacrificing the exact size, use
configure to help us determine a valid command to acquire our filesize and
place it in the sync database.

Signed-off-by: Dan McGee <dan@archlinux.org>

configure.ac

@@ -182,18 +182,24 @@ GCC_VISIBILITY_CC
 GCC_GNU89_INLINE_CC
 
 # Host-dependant definitions
+SIZECMD="stat -c %s"
 case "${host_os}" in
+	*bsd*)
+		SIZECMD="stat -f %z"
+		;;
 	cygwin*)
 		host_os_cygwin=yes
 		CFLAGS="$CFLAGS -DCYGWIN"
 		;;
 	darwin*)
 		host_os_darwin=yes
+		SIZECMD="stat -f %z"
 		;;
 esac
 
 AM_CONDITIONAL([CYGWIN], test "x$host_os_cygwin" = "xyes")
 AM_CONDITIONAL([DARWIN], test "x$host_os_darwin" = "xyes")
+AC_SUBST(SIZECMD)
 
 # Check for architecture, used in default makepkg.conf
 # (Note single space left after CARCHFLAGS)
@@ -365,6 +371,7 @@ ${PACKAGE_NAME}:
     Architecture           : ${CARCH}
     Architecture flags     : ${CARCHFLAGS}
     Host Type              : ${CHOST}
+    Filesize command       : ${SIZECMD}
 
     libalpm version        : ${LIB_VERSION}
     libalpm version info   : ${LIB_VERSION_INFO}

scripts/Makefile.am

@@ -37,6 +37,7 @@ edit = sed \
 	-e 's|@PACKAGE_BUGREPORT[@]|$(PACKAGE_BUGREPORT)|g' \
 	-e 's|@PACKAGE_NAME[@]|$(PACKAGE_NAME)|g' \
 	-e 's|@DBEXT[@]|$(DBEXT)|g' \
+	-e 's|@SIZECMD[@]|$(SIZECMD)|g' \
 	-e 's|@configure_input[@]|Generated from $@.in; do not edit by hand.|g'
 
 ## All the scripts depend on Makefile so that they are rebuilt when the

scripts/repo-add.sh.in

@@ -122,7 +122,7 @@ db_write_delta()
 
 	# get md5sum and size of delta
 	md5sum="$(md5sum "$deltafile" | cut -d ' ' -f 1)"
-	csize=$(du -kL "$deltafile" | awk '{print $1 * 1024}')
+	csize=$(@SIZECMD@ "$deltafile")
 
 	# ensure variables were found
 	if [ -z "$pkgname" -o -z "$fromver" -o -z "$tover" -o -z "$arch" ]; then
@@ -170,7 +170,7 @@ db_write_entry()
 	IFS=$OLDIFS
 
 	# get compressed size of package
-	csize=$(du -kL "$pkgfile" | awk '{print $1 * 1024}')
+	csize=$(@SIZECMD@ "$pkgfile")
 
 	startdir=$(pwd)
 	pushd "$gstmpdir" 2>&1 >/dev/null