vars/build.vars:{native_packages_*,dist_minipix}: enables parallelisation.

vars/env.vars:${DEFAULT_BUILD_VARS}: adds ${PKG_PARALLELISE}.
subr/ex_pkg_dispatch.subr: implements parallelisation.

1 files changed, 52 insertions, 39 deletions

diff --git a/subr/ex_pkg_dispatch.subr b/subr/ex_pkg_dispatch.subr
index 7a8a95d2..4fbc2b17 100644
--- a/subr/ex_pkg_dispatch.subr
+++ b/subr/ex_pkg_dispatch.subr
@@ -9,7 +9,7 @@
 ex_pkg_dispatch() {
 	local _tgt_name="${1}" _restart="${2}" _restart_at="${3}"		\
 		_dispatch_fn="${4}" _tgt_name_uc				\
-		_pkg_names _pkg_name _pkg_name_uc				\
+		_pkg_names _njob _njobs _njobs_max _pkg_name _pkg_name_uc	\
 		_pipe_path _stderrout_path _pipe_msg _script_rc;
 	ex_rtl_fileop mkdir "${BUILD_WORKDIR}";
 	_pipe_path="${BUILD_WORKDIR}/build.fifo";
@@ -20,47 +20,60 @@ ex_pkg_dispatch() {
 	&& [ "${_restart}" != ALL ]; then
 		_pkg_names="$(ex_rtl_lfilter "${_pkg_names}" "${_restart}")";
 	fi;
-	for _pkg_name in ${_pkg_names}; do
-		_pkg_name_uc="$(ex_rtl_toupper "${_pkg_name}")";
-		if [ -n "$(ex_rtl_get_var_unsafe PKG_${_pkg_name_uc}_DISABLED)" ]; then
-			"${_dispatch_fn}" disabled_pkg "${_pkg_name}" "${_tgt_name}";
-			continue;
-		elif ex_pkg_state_test "${_pkg_name}" finish\
-		&& [ -z "${_restart_at}" ]; then
-			"${_dispatch_fn}" skipped_pkg "${_pkg_name}" "${_tgt_name}";
-			continue;
+	set -- ${_pkg_names};
+	while [ ${#} -gt 0 ]; do
+		_script_rc=0; _njobs=0;
+		if [ "$(ex_rtl_get_var_unsafe ${_tgt_name_uc}_PARALLELISE)" = 1 ]; then
+			_njobs_max="${DEFAULT_BUILD_CPUS}";
 		else
-			ex_rtl_fileop mkfifo "${_pipe_path}";
-			_stderrout_path="${BUILD_WORKDIR}/${_pkg_name}_stderrout.log";
-			_script_rc=1;
-			"${_dispatch_fn}" start_pkg "${_pkg_name}" "${_tgt_name}";
+			_njobs_max=1;
 		fi;
-		(set -o errexit -o noglob;
-		ex_pkg_env "${_pkg_name}" "${_tgt_name}" "${_restart_at}";
-		trap "if [ \${?} -eq 0 ]; then					\
-			echo \"done ${PKG_NAME}\" >&3;				\
-		      else							\
-			echo \"fail ${PKG_NAME}\" >&3;				\
-		      fi;" EXIT HUP INT TERM USR1 USR2;
-		ex_pkg_exec "${_pkg_name}" "${_tgt_name}" "${_restart_at}"	\
-			"${_dispatch_fn}";) 1>"${_stderrout_path}" 2>&1 3>"${_pipe_path}" &
-		while read _pipe_msg; do
-		case "${_pipe_msg%% *}" in
-		done)	_script_rc=0;
-			"${_dispatch_fn}" finish_pkg "${_pkg_name}" "${_tgt_name}";
-			break; ;;
-		fail)	_script_rc=1;
-			"${_dispatch_fn}" fail_pkg "${_pkg_name}" "${_tgt_name}";
-			break; ;;
-		step)	"${_dispatch_fn}" step_pkg ${_pipe_msg#step }; ;;
-		*)	_script_rc=1;
-			"${_dispatch_fn}" fail_pkg "${_pkg_name}" "${_tgt_name}";
-			break; ;;
-		esac; done <"${_pipe_path}";
-		ex_rtl_fileop rm "${_pipe_path}";
-		if [ "${_script_rc:-1}" -eq 1 ]; then
-			return 1;
+		ex_rtl_fileop mkfifo "${_pipe_path}";
+		for _njob in $(seq 1 ${_njobs_max}); do
+			if [ ${#} -eq 0 ]; then
+				break;
+			else
+				_pkg_name="${1}"; shift;
+				_pkg_name_uc="$(ex_rtl_toupper "${_pkg_name}")";
+			fi;
+			if [ -n "$(ex_rtl_get_var_unsafe PKG_${_pkg_name_uc}_DISABLED)" ]; then
+				"${_dispatch_fn}" disabled_pkg "${_pkg_name}" "${_tgt_name}";
+				continue;
+			elif ex_pkg_state_test "${_pkg_name}" finish\
+			&& [ -z "${_restart_at}" ]; then
+				"${_dispatch_fn}" skipped_pkg "${_pkg_name}" "${_tgt_name}";
+				continue;
+			else
+				_stderrout_path="${BUILD_WORKDIR}/${_pkg_name}_stderrout.log";
+				"${_dispatch_fn}" start_pkg "${_pkg_name}" "${_tgt_name}";
+			fi;
+			(set -o errexit -o noglob;
+			ex_pkg_env "${_pkg_name}" "${_tgt_name}" "${_restart_at}";
+			trap "if [ \${?} -eq 0 ]; then					\
+				echo \"done ${_pkg_name} ${_tgt_name}\" >&3;		\
+			      else							\
+				echo \"fail ${_pkg_name} ${_tgt_name}\" >&3;		\
+			      fi;" EXIT HUP INT TERM USR1 USR2;
+			ex_pkg_exec "${_pkg_name}" "${_tgt_name}" "${_restart_at}"	\
+				"${_dispatch_fn}";) 1>"${_stderrout_path}" 2>&1 3>"${_pipe_path}" &
+			: $((_njobs+=1));
+		done;
+		if [ "${_njobs:-0}" -gt 0 ]; then
+			while read _pipe_msg; do
+			case "${_pipe_msg%% *}" in
+			done)	"${_dispatch_fn}" finish_pkg ${_pipe_msg#done };
+				[ $((_njobs-=1)) -eq 0 ] && break; ;;
+			fail)	_script_rc=1;
+				"${_dispatch_fn}" fail_pkg ${_pipe_msg#fail };
+				[ $((_njobs-=1)) -eq 0 ] && break; ;;
+			step)	"${_dispatch_fn}" step_pkg ${_pipe_msg#step };
+			esac; done <"${_pipe_path}";
+			if [ "${_script_rc:-1}" -eq 1 ]; then
+				ex_rtl_fileop rm "${_pipe_path}";
+				return 1;
+			fi;
 		fi;
+		ex_rtl_fileop rm "${_pipe_path}";
 	done;
 	"${_dispatch_fn}" finish_target "" "${_tgt_name}";
 };