Initial implementation of pkgtool.sh.

build.sh:build(): move cd(1) to $(dirname "${0}").
etc/{build.usage,README.md}: updated.
midipix.env:${DEFAULT_CLEAR_ENV_VARS_EXCEPT}: allow inheriting ARCH, BUILD, BUILD_DLCACHEDIR, BUILD_WORKDIR, and PREFIX* from the environment.
pkgtool.sh: initial implementation.
subr/build_init.subr:buildp_init_defaults(): allow inheriting ARCH, BUILD, BUILD_DLCACHEDIR, BUILD_WORKDIR, and PREFIX* from the environment.
subr/build_init.subr:buildp_init_env(): move cd(1) to $(dirname "${0}").
subr/build_init.subr:buildp_init_files(): correctly pass ${_status} from rtl_check_path_vars().
subr/ex_pkg_exec.subr:ex_pkg_exec(): dump subset of variables and exported variables on build failure and --dump-on-abort.
subr/pkgtool_init.subr: adapted from subr/build_init.subr.
subr/rtl_complex.subr:rtl_filter_vars(): initial implementation.
subr/rtl_string.subr:rtl_subst(): initial implementation.

1 files changed, 80 insertions, 0 deletions

diff --git a/pkgtool.sh b/pkgtool.sh
new file mode 100755
index 00000000..ec17cc0e
--- /dev/null
+++ b/pkgtool.sh
@@ -0,0 +1,80 @@
+#!/bin/sh
+# Copyright (c) 2019 Lucio Andrés Illanes Albornoz <lucio@lucioillanes.de>
+#
+
+pkgtoolp_restart_at() {
+	case "${ARG_RESTART_AT}" in
+	ALL)	"${MIDIPIX_BUILD_PWD}/build.sh" -P -r "${PKG_NAME}" -v; ;;
+	*)	"${MIDIPIX_BUILD_PWD}/build.sh" -P -r "${PKG_NAME}:${ARG_RESTART_AT}" -v; ;;
+	esac;
+};
+
+pkgtoolp_shell() {
+	rtl_log_msg info "Launching shell \`${SHELL}' within package environment and \`${PKG_BUILD_DIR}'.";
+	rtl_log_msg info "Run \$R to rebuild \`${PKG_NAME}'.";
+	rtl_log_msg info "Run \$RS <step> to restart the specified build step of \`${PKG_NAME}'";
+	rtl_log_msg info "Run \$D to automatically regenerate the patch for \`${PKG_NAME}'.";
+	export	ARCH BUILD							\
+		BUILD_DLCACHEDIR BUILD_WORKDIR					\
+		MAKE="make LIBTOOL=${PKG_LIBTOOL:-slibtool}"			\
+		MIDIPIX_BUILD_PWD						\
+		PKG_NAME							\
+		PREFIX PREFIX_CROSS PREFIX_MINGW32 PREFIX_MINIPIX		\
+		PREFIX_NATIVE PREFIX_ROOT PREFIX_RPM;
+	D="${MIDIPIX_BUILD_PWD}/${0##*/} --update-diff"				\
+	R="${MIDIPIX_BUILD_PWD}/${0##*/} --restart-at ALL"			\
+	RS="${MIDIPIX_BUILD_PWD}/${0##*/} --restart-at "			\
+	"${SHELL}";
+};
+
+pkgtoolp_update_diff() {
+	local _diff_fname_dst="" _diff_fname_src="" _fname="" _fname_base="";
+	if [ -n "${PKG_VERSION}" ]; then
+		_diff_fname_dst="${PKG_NAME}-${PKG_VERSION}.local.patch";
+	else
+		_diff_fname_dst="${PKG_NAME}.local.patch";
+	fi;
+	if ! _diff_fname_src="$(mktemp)"; then
+		rtl_log_msg failexit "Error: failed to create temporary target diff(1) file.";
+	else	trap "rm -f \"${_diff_fname_src}\" >/dev/null 2>&1" EXIT HUP INT TERM USR1 USR2;
+		(cd "${PKG_BASE_DIR}" && printf "" > "${_diff_fname_src}";
+		 for _fname in $(find "${PKG_SUBDIR}" -iname \*.orig); do
+			_fname_base="${_fname##*/}"; _fname_base="${_fname_base%.orig}";
+			case "${_fname_base}" in
+			config.sub)
+				continue; ;;
+			*)	diff -u "${_fname}" "${_fname%.orig}" >> "${_diff_fname_src}"; ;;
+			esac;
+		done);
+		if [ "${?}" -ne 0 ]; then
+			rtl_log_msg failexit "Error: failed to create diff(1).";
+		elif ! rtl_fileop mv "${_diff_fname_src}" "${MIDIPIX_BUILD_PWD}/patches/${_diff_fname_dst}"; then
+			rtl_log_msg failexit "Error: failed to rename diff(1) to \`${MIDIPIX_BUILD_PWD}/patches/${_diff_fname_dst}'.";
+		else	trap - EXIT HUP INT TERM USR1 USR2;
+			rtl_log_msg info "Updated \`${MIDIPIX_BUILD_PWD}/patches/${_diff_fname_dst}'.";
+		fi;
+	fi;
+};
+
+pkgtool() {
+	if ! cd "$(dirname "${0}")"\
+	|| ! . ./subr/pkgtool_init.subr\
+	|| ! pkgtool_init "${@}"; then
+		printf "Error: failed to setup environment.\n"; exit 1;
+	elif [ ! -e "${BUILD_WORKDIR}/${PKG_NAME}.dump" ]; then
+		rtl_log_msg failexit "Error: failed to locate environment dump for package \`${PKG_NAME}' in \`${BUILD_WORKDIR}'.";
+	elif ! . "${BUILD_WORKDIR}/${PKG_NAME}.dump"; then
+		rtl_log_msg failexit "Error: failed to source environment dump for package \`${PKG_NAME}' from \`${BUILD_WORKDIR}'.";
+	elif ! rtl_fileop cd "${PKG_BUILD_DIR}"; then
+		rtl_log_msg failexit "Error: failed to change working directory to \`${PKG_BUILD_DIR}'.";
+	elif [ -n "${ARG_RESTART_AT}" ]; then
+		pkgtoolp_restart_at;
+	elif [ "${ARG_UPDATE_DIFF:-0}" -eq 1 ]; then
+		pkgtoolp_update_diff;
+	else	pkgtoolp_shell;
+	fi;
+};
+
+set +o errexit -o noglob; pkgtool "${@}";
+
+# vim:filetype=sh textwidth=0