handle errors on exits from subshells

most of these are probably redundant, and will never
be called, but lbmk needs to be as safe as possible
under fault conditions. fail early, fail hard.

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

script/update/release

@@ -50,11 +50,11 @@ build_release()
 	cd "${srcdir}" || err "${_xm}: !cd \"${srcdir}\""
 	fetch_trees
 	x_ mv src/docs docs
-	)
+	) || err "can't copy docs"
 	(
 	cd "${srcdir%/*}" || err "${_xm}: mktarball \"${srcdir}\""
 	mktarball "${srcdir##*/}" "${srcdir##*/}.tar.xz" || err "${_xm}: mksrc"
-	)
+	) || err "can't create pre-crossgcc src tarball"
 	[ "${mode}" = "src" ] && return 0 # for src mode, xgcc tarballs are
 					  # not included in the src archive
 
@@ -64,7 +64,7 @@ build_release()
 	(
 	cd "${srcdir}" || err "${_xm}: 2 !cd \"${srcdir}\""
 	mkrom_images
-	)
+	) || err "can't build rom images"
 	for _cbd in "${srcdir}/src/coreboot/"*; do
 		[ -d "${_cbd}/util/crossgcc/tarballs" ] || continue
 		_xgccdir="${vdir}/crossgcc/${_cbd##*/}"
@@ -78,7 +78,7 @@ build_release()
 	cd "${srcdir%/*}" || err "${_xm} 2: mktarball \"${srcdir}\""
 	tar -xf "${srcdir##*/}.tar.xz" || err "!extract ${srcdir##*/}.tar.xz"
 	rm -f "${srcdir##*/}.tar.xz" || err "!rm -f ${srcdir##*/}.tar.xz"
-	)
+	) || err "can't extract pre-crossgcc src tarball"
 	for _xgcc in "${vdir}/crossgcc/"*; do
 		[ -d "${_xgcc}" ] || continue
 		mkdir -p "${srcdir}/src/coreboot/${_xgcc##*/}/util/crossgcc/tarballs" || \
@@ -91,7 +91,7 @@ build_release()
 	(
 	cd "${srcdir%/*}" || err "${_xm}: mktarball \"${srcdir}\""
 	mktarball "${srcdir##*/}" "${srcdir##*/}.tar.xz" || err "${_xm}: mksrc"
-	)
+	) || err "can't create src tarball with crossgcc"
 
 	# now test the vendor insert script, using the release archive:
 	(
@@ -106,7 +106,7 @@ build_release()
 		    err "TESTFAIL: inject: ${vrom##*/}"
 		continue
 	done
-	)
+	) || err "vendorfile inject test failure"
 
 	rm -Rf "${srcdir}" || err "!rm -Rf ${srcdir}"
 }
@@ -210,7 +210,7 @@ nukerom()
 	(
 	cd "${romdir}" || err "!cd romdir ${romdir}, nukerom"
 	sha512sum *.rom >> vendorhashes || err "!create vendorhashes, nukerom"
-	)
+	) || err "can't create vendor hashes"
 
 	for romfile in "${romdir}"/*.rom; do
 		[ -f "${romfile}" ] || continue
@@ -257,7 +257,7 @@ mkrom_tarball()
 	(
 	cd "${romdir%/bin/${target}}" || err "!cd ${romdir%/bin/${target}}"
 	mktarball "bin/${target}" "${archivename}.tar.xz"
-	)
+	) || err "can't create rom tarball"
 	mv "${romdir%/bin/${target}}/${archivename}.tar.xz"* "${f%/*}" || \
 	    err "!mktarball, rom, ${f%/*}/${romdir%/bin/${target}}/${archivename}.tar.xz"
 
@@ -289,7 +289,7 @@ mktarball()
 	[ "${2%/*}" != "${2}" ] && x_ cd "${2%/*}"
 	sha512sum "${2##*/}" > "${2##*/}.sha512" || \
 	    err "!sha512sum \"${2##*/}\" > \"${2##*/}.sha512\""
-	)
+	) || err "failed to create tarball checksum"
 }
 
 main $@

script/update/trees

@@ -61,7 +61,7 @@ build_projects()
 		x_ cd src/uefitool
 		cmake UEFIExtract/ || [ -f Makefile ] || \
 		    err "build_projects: !cmake UEFIExtract/"
-	)
+	) || err "can't build cmake on uefiextract"
 	fi
 
 	[ "${mode}" = "distclean" ] && mode="clean"