mk: add forx function for shorthand loops

Signed-off-by: Leah Rowe <leah@libreboot.org>

include/fw/inject.sh

@@ -24,8 +24,7 @@ inject()
 	archive="$1";
 	new_mac="xx:xx:xx:xx:xx:xx"
 
-	nuke=""
-	xchanged=""
+	eval "`newvar nuke xchanged`"
 
 	[ $# -gt 1 ] && case "$2" in
 	nuke)
@@ -169,9 +168,7 @@ modify_mac()
 	x_ cp "${CONFIG_GBE_BIN_PATH##*../}" "$xbtmp/gbe"
 
 	if [ -n "$new_mac" ] && [ "$new_mac" != "restore" ]; then
-		x_ make -C util/nvmutil clean
-		x_ make -C util/nvmutil
-
+		forx 'x_ make -C util/nvmutil %s' clean nvmutil
 		x_ "$nvmutil" "$xbtmp/gbe" setmac "$new_mac"
 	fi
 

include/fw/rom.sh

@@ -131,10 +131,7 @@ mkcorebootbin()
 		return 0
 
 	$if_not_dry_build \
-		check_coreboot_util cbfstool
-
-	$if_not_dry_build \
-		check_coreboot_util ifdtool
+		forx 'check_coreboot_util %s' cbfstool ifdtool
 
 	for y in "$target_dir/config"/*; do
 		defconfig="$y"

include/fw/vendor.sh

@@ -443,10 +443,7 @@ bootstrap()
 	x_ "$mk" -f coreboot "${cbdir##*/}"
 	x_ "$mk" -f me_cleaner
 
-	x_ "$mk" -b bios_extract
-	x_ "$mk" -b biosutilities
-	x_ "$mk" -b uefitool
-	x_ "$mk" -b libarchive # for bsdtar and bsdunzip
+	forx 'x_ \"$mk\" -b %s' bios_extract biosutilities uefitool libarchive
 
 	[ -d "${kbc1126_ec_dump%/*}" ] && \
 		x_ make -C "$cbdir/util/kbc1126"

include/mk/release.sh

@@ -22,9 +22,7 @@ release()
 	x_ git clone . "$rsrc"
 	update_xbmkver "$rsrc"
 
-	prep_release src
-	prep_release tarball
-	prep_release bin
+	forx 'prep_release %s' src tarball bin
 
 	x_ rm -Rf "$rsrc"
 
@@ -55,8 +53,7 @@ prep_release_src()
 
 	x_ ./mk -f
 
-	fx_ "x_ rm -Rf" x_ find . -name ".git"
-	fx_ "x_ rm -Rf" x_ find . -name ".gitmodules"
+	forx 'fx_ \"x_ rm -Rf\" x_ find . -name \".%s\"' git gitmodules
 
 	( fx_ nuke x_ find config -type f -name "nuke.list" ) || \
 	    err "can't prune project files" "prep_release_src" "$@"; :
@@ -93,10 +90,7 @@ prep_release_bin()
 {
 	x_ ./mk -d coreboot
 
-	x_ ./mk -b coreboot
-	x_ ./mk -b pico-serprog
-	x_ ./mk -b stm32-vserprog
-	x_ ./mk -b pcsx-redux
+	forx 'x_ ./mk -b' coreboot pico-serprog stm32-vserprog pcsx-redux
 
 	fx_ mkrom_tarball x_ find bin -mindepth 1 -maxdepth 1 \
 	    -type d -name "serprog_*"

mk

@@ -9,15 +9,27 @@
 
 set -u -e
 
-eval "`printf "LANG LANGUAGE LC_CTYPE LC_NUMERIC LC_TIME LC_COLLATE \
-    LC_MONETARY LC_MESSAGES LC_PAPER LC_NAME LC_ADDRESS LC_TELEPHONE \
-    LC_MEASUREMENT LC_IDENTIFICATION LC_ALL\n" | \
-    awk '{ for (i=1; i<=NF; i++) $i = "export " $i "=C.UTF-8;"; print }'`"
-
 findpath()
 {
-	eval "$(printf '%s\n' "$@" | awk '{printf "readlink -f \"%s\" \
-	    2>/dev/null || realpath \"%s\" 2>/dev/null || return 1;",$0,$0}')"
+	forx 'readlink -f \"%s\" 2>/dev/null || \
+	    x_ realpath \"%s\" 2>/dev/null' "$@"
+}
+
+# WARNING: relies on -o option in grep.
+# gnu, busybox, openbsd, netbsd and freebsd all have it
+forx()
+{
+
+	awkarg="{printf \"${1-};\""
+	shift 1 2>/dev/null || :
+
+	scount="$(printf "%s\n" "$awkarg" | grep -o "%s" | wc -l)"
+	while [ $scount -gt 0 ]; do
+		awkarg="$awkarg,\$0"
+		scount="$(expr $scount - 1 || :)"
+	done
+
+	eval "$(printf '%s\n' "$@" | awk "$awkarg}")"
 }
 
 x_()
@@ -33,6 +45,10 @@ err()
 	exit 1
 }
 
+forx 'export %s=\"C.UTF-8\"' LANG LANGUAGE LC_CTYPE LC_NUMERIC LC_TIME \
+    LC_COLLATE LC_MONETARY LC_MESSAGES LC_PAPER LC_NAME LC_ADDRESS \
+    LC_TELEPHONE LC_MEASUREMENT LC_IDENTIFICATION LC_ALL
+
 (
 mk="$0"
 [ "${mk##*/}" != "$mk" ] || \