error handling code cleanup and fixes

in some cases, use of x_ or xx_ can be error-prone,
due to the way $@ is handled; commands requiring
quotes, or with funny file names as arguments such
as spaces in the file name, or other special
characters, can make the x/xx functions break.

in those cases, where x/xx must not be used, the
commands use || err instead

in other cases, use of x/xx is superfluous, and has
been removed in some commands.

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

script/update/trees

@@ -18,8 +18,7 @@ eval "$(setvars "" arch cfgsdir codedir config config_name crossgcc_ada mode \
 
 main()
 {
-	while getopts f:b:m:u:c:x:s:l:n: option
-	do
+	while getopts f:b:m:u:c:x:s:l:n: option; do
 		_f="${1}"
 		case "${1}" in
 		-b) : ;;
@@ -38,11 +37,8 @@ main()
 	[ -z "${_f}" ] && err "missing flag (-m/-u/-b/-c/-x/-f/-s/-l/-n)"
 	[ -z "${project}" ] && err "project name not specified"
 
-	if [ ! -f "config/${project}/build.list" ]; then
-		build_projects $@
-	else
-		build_targets $@
-	fi
+	[ -f "config/${project}/build.list" ] && build_targets $@ && return 0
+	build_projects $@
 }
 
 build_projects()
@@ -209,7 +205,7 @@ check_cross_compiler()
 	fi
 
 	# we *must* ensure that u-boot's build system uses crossgcc first
-	export PATH="$(pwd)/${cbdir}/util/crossgcc/xgcc/bin:$PATH"
+	export PATH="${PWD}/${cbdir}/util/crossgcc/xgcc/bin:$PATH"
 }
 
 check_config()

script/vendor/download

@@ -134,7 +134,7 @@ mkdirs()
 {
 	[ -f "${1}" ] && \
 		printf "mkdirs ${1} ${2}: already downloaded\n" 1>&2 && return 1
-	x_ mkdir -p "${1%/*}"
+	mkdir -p "${1%/*}" || err "mkdirs: !mkdir -p ${1%/*}"
 	x_ rm -Rf "${appdir}"
 	x_ mkdir -p "${appdir}/"
 	extract_archive "${_dl}" "${appdir}" || \
@@ -190,7 +190,7 @@ extract_kbc1126ec()
 	mv Rompaq/68*.BIN ec.bin || :
 	if [ ! -f ec.bin ]; then
 		unar -D ROM.CAB Rom.bin || unar -D Rom.CAB Rom.bin || \
-		    x_ unar -D 68*.CAB Rom.bin
+		    unar -D 68*.CAB Rom.bin || err "can't extract Rom.bin"
 		x_ mv Rom.bin ec.bin
 	fi
 	[ -f ec.bin ] || err "extract_kbc1126_ec ${board}: can't extract"
@@ -203,7 +203,8 @@ extract_kbc1126ec()
 	done
 	[ "${ec_ex}" = "y" ] || \
 	    err "extract_kbc1126_ec ${board}: didn't extract ecfw1/2.bin"
-	x_ cp "${appdir}/"ec.bin.fw* "${_dest%/*}/"
+	cp "${appdir}/"ec.bin.fw* "${_dest%/*}/" || \
+	    err "extract_kbc1126_ec ${board}: can't copy ec binaries"
 }
 
 extract_e6400vga()
@@ -221,7 +222,8 @@ extract_e6400vga()
 	[ -f "${E6400_VGA_romname}" ] || \
 		err "extract_e6400vga: can't extract vga rom from bios.bin"
 	)
-	x_ cp "${appdir}/${E6400_VGA_romname}" "${_dest}"
+	cp "${appdir}/${E6400_VGA_romname}" "${_dest}" || \
+	    err "extract_e6400vga ${board}: can't copy vga rom to ${_dest}"
 }
 
 extract_sch5545ec()

script/vendor/inject

@@ -78,7 +78,7 @@ detect_board()
 		_stripped_prefix=${filename#*_}
 		board="${_stripped_prefix%.tar.xz}" ;;
 	*)
-		err "detect_board: could not detect board type"
+		err "detect_board $filename: could not detect board type"
 	esac	
 	[ -d "${boarddir}/" ] || \
 		err "detect_board: dir, ${boarddir}, doesn't exist"
@@ -98,7 +98,10 @@ build_dependencies()
 
 inject_vendorfiles()
 {
-	[ "${release}" != "y" ] && x_ patch_rom "${rom}" && return 0
+	if [ "${release}" != "y" ]; then
+		patch_rom "${rom}"
+		return 0
+	fi
 	printf "patching release images\n"
 	patch_release_roms
 }
@@ -108,11 +111,12 @@ patch_release_roms()
 	_tmpdir="tmp/romdir"
 	x_ rm -Rf "${_tmpdir}"
 	x_ mkdir -p "${_tmpdir}"
-	x_ tar -xf "${archive}" -C "${_tmpdir}"
+	tar -xf "${archive}" -C "${_tmpdir}" || \
+	    err "patch_release_roms: !tar -xf \"${archive}\" -C \"${_tmpdir}\""
 
 	for x in "${_tmpdir}"/bin/*/*.rom ; do
 		printf "patching rom: %s\n" "$x"
-		x_ patch_rom "${x}"
+		patch_rom "${x}"
 	done
 	for x in "${_tmpdir}"/bin/*/*_nomicrocode.rom ; do
 		[ -f "${x}" ] || continue
@@ -123,7 +127,7 @@ patch_release_roms()
 	done
 
 	(
-	x_ cd "${_tmpdir}/bin/"*
+	x_ cd "${_tmpdir}/bin/"* # TODO: very dodgy, re-write accordingly
 
 	# NOTE: For compatibility with older rom releases, defer to sha1
 	[ "${nukemode}" = "nuke" ] || \
@@ -211,22 +215,28 @@ inject()
 
 	if [ "${_t}" = "GbE" ]; then
 		x_ mkdir -p tmp
-		x_ cp "${_dest}" "tmp/gbe.bin"
+		cp "${_dest}" "tmp/gbe.bin" || \
+		    err "inject: !cp \"${_dest}\" \"tmp/gbe.bin\""
 		_dest="tmp/gbe.bin"
-		x_ "${nvmutil}" "${_dest}" setmac "${new_mac}"
+		"${nvmutil}" "${_dest}" setmac "${new_mac}" || \
+		    err "inject ${_dest}: can't change mac address"
 	fi
 	if [ "${cbfsname}" = "IFD" ]; then
 		if [ "${nukemode}" != "nuke" ]; then
-			x_ "${ifdtool}" -i ${_t}:${_dest} "${rom}" -O "$rom"
+			"${ifdtool}" -i ${_t}:${_dest} "${rom}" -O "$rom" || \
+			    err "inject: can't insert $_t ($dest) into $rom"
 		else
-			x_ "${ifdtool}" --nuke ${_t} "${rom}" -O "${rom}"
+			"${ifdtool}" --nuke ${_t} "${rom}" -O "${rom}" || \
+			    err "inject ${rom}: can't nuke ${_t} in IFD"
 		fi
 	else
 		if [ "${nukemode}" != "nuke" ]; then
-			x_ "${cbfstool}" "${rom}" add -f "${_dest}" \
-			    -n "${cbfsname}" -t ${_t} ${_offset}
+			"${cbfstool}" "${rom}" add -f "${_dest}" \
+			    -n "${cbfsname}" -t ${_t} ${_offset} || \
+			    err "inject $rom: can't insert $_t file $_dest"
 		else
-			x_ "${cbfstool}" "${rom}" remove -n "${cbfsname}"
+			"${cbfstool}" "${rom}" remove -n "${cbfsname}" || \
+			    err "inject $rom: can't remove ${cbfsname}"
 		fi
 
 	fi