Reduce awk(1), grep(1), seq(1), and stat(1) usage.

subr/build_init.subr:buildp_init_files(): replace timestamp w/ running total log filename suffix.
subr/build_init.subr:buildp_init_prereqs(): ensure sed(1) supports -i option.
subr/rtl_complex.subr:rtl_{get_cpu_count,is_newer}(): initial implementation.
subr/rtl_string.subr:rtl_match(): initial implementation.

1 files changed, 22 insertions, 24 deletions

diff --git a/subr/build_init.subr b/subr/build_init.subr
index c5f91174..eeeaf60b 100644
--- a/subr/build_init.subr
+++ b/subr/build_init.subr
@@ -87,7 +87,7 @@ buildp_init_env() {
 };
 
 buildp_init_files() {
-	local _log_last_fname="" _log_last_ts="" _rc=0; _status=""
+	local _log_last_fname="" _log_last_num=1 _rc=0; _status=""
 	if ! rtl_fileop mkdir "${BUILD_DLCACHEDIR}" "${BUILD_WORKDIR}"\
 	|| rtl_lmatch "${ARG_DIST}" "rpm" ","\
 	&& ! rtl_fileop mkdir "${PREFIX_RPM}"; then
@@ -98,12 +98,12 @@ buildp_init_files() {
 		_rc=1; _status="Error: failed to clean environment.";
 	elif ! rtl_check_path_vars "${DEFAULT_CHECK_PATH_VARS}"; then
 		_rc=1; _status="${_status}";
-	else
-		touch "${DEFAULT_BUILD_STATUS_IN_PROGRESS_FNAME}";
+	else	touch "${DEFAULT_BUILD_STATUS_IN_PROGRESS_FNAME}";
 		if [ -e "${DEFAULT_BUILD_LOG_FNAME}" ]; then
-			_log_last_ts="$(stat -c %Y "${DEFAULT_BUILD_LOG_FNAME}")";
-			_log_last_ts="$(awk 'BEGIN {printf(strftime("%Y-%m-%d-%H-%M-%S", '"${_log_last_ts}"'))}')";
-			_log_last_fname="${DEFAULT_BUILD_LOG_FNAME}.${_log_last_ts}";
+			while [ -e "${DEFAULT_BUILD_LOG_FNAME}.${_log_last_num}" ]; do
+				: $((_log_last_num+=1));
+			done;
+			_log_last_fname="${DEFAULT_BUILD_LOG_FNAME}.${_log_last_num}";
 			rtl_fileop mv "${DEFAULT_BUILD_LOG_FNAME}" "${_log_last_fname}";
 			rtl_fileop ln_symbolic "${_log_last_fname}" "${DEFAULT_BUILD_LOG_LAST_FNAME}";
 		fi;
@@ -224,21 +224,20 @@ buildp_init_groups() {
 buildp_init_prereqs() {
 	local _cmd="" _cmds_missing="" _rc=0; _status="";
 	for _cmd in	\
-			awk bunzip2 cat chmod cmake cp date find flock g++	\
-			gcc git grep gunzip gzip hostname install kill		\
-			ln lzip make mkdir mkfifo mv paste patch perl		\
-			pgrep pkill printf readlink rm sed seq sha256sum	\
-			sort stat tail tar test touch tr wget xz zip; do
+			awk bunzip2 bzip2 cat chmod cmake cp date find flock	\
+			g++ gcc git grep gunzip gzip hostname install kill	\
+			ln lzip make mkdir mkfifo mktemp mv paste patch perl	\
+			pgrep pkill printf readlink rm sed sha256sum sort	\
+			tail tar test touch tr uniq wget xz zip; do
 		if ! which "${_cmd}" >/dev/null 2>&1; then
 			_cmds_missing="${_cmds_missing:+${_cmds_missing} }${_cmd}";
 		fi;
 	done;
 	if [ -n "${_cmds_missing}" ]; then
 		_rc=1; _status="Error: missing prerequisite package(s): ${_cmds_missing}";
-	elif ! awk -V 2>/dev/null | grep -q "^GNU Awk "; then
-		_rc=1; _status="Error: awk(1) in \$PATH must be GNU Awk.";
-	elif ! sed --version 2>/dev/null | grep -q "^GNU sed "; then
-		_rc=1; _status="Error: sed(1) in \$PATH must be GNU sed.";
+	elif ! (FNAME="$(mktemp)" && { trap "rm -f \"\${FNAME}\"" EXIT;		\
+			sed -i'' -e '' "${FNAME}" >/dev/null 2>&1; }); then
+		_rc=1; _status="Error: sed(1) in \${PATH} does not support the \`-i' option.";
 	fi;
 	return "${_rc}";
 };
@@ -256,20 +255,19 @@ buildp_init_vars() {
 		nt32)	DEFAULT_TARGET="i686-nt32-midipix"; ;;
 		nt64)	DEFAULT_TARGET="x86_64-nt64-midipix"; ;;
 		esac;
-		if [ -e "/proc/cpuinfo" ]; then
-			DEFAULT_BUILD_CPUS="$(awk '/^processor/{cpus++} END{print cpus}' /proc/cpuinfo)";
+		if DEFAULT_BUILD_CPUS="$(rtl_get_cpu_count)"; then
 			if [ "${ARG_PARALLEL}" = "auto" ]\
 			&& [ "${DEFAULT_BUILD_CPUS}" -gt 1 ]; then
 				ARG_PARALLEL=$((${DEFAULT_BUILD_CPUS}/2));
 			fi;
+			rtl_fileop source_opt							\
+				"${HOME}/midipix_build.vars" "${HOME}/.midipix_build.vars"	\
+				../midipix_build.vars ./midipix.env;
+			if [ -z "${PREFIX}" ]; then
+				_rc=1; _status="Error: \${PREFIX} empty or unset.";
+			fi;
 		fi;
-		rtl_fileop source_opt							\
-			"${HOME}/midipix_build.vars" "${HOME}/.midipix_build.vars"	\
-			../midipix_build.vars ./midipix.env;
-		if [ -z "${PREFIX}" ]; then
-			_rc=1; _status="Error: \${PREFIX} empty or unset.";
-		fi; fi;
-	return "${_rc}";
+	fi; return "${_rc}";
 };
 
 build_init() {