subr.ex/ex_pkg.subr:ex_pkg_register_group(): separate {owner,copy} from {auto,noauto} groups.

groups.d/dev_packages.group: updated.
etc/README.md: updated.

3 files changed, 27 insertions, 20 deletions

diff --git a/etc/README.md b/etc/README.md
index 001a583e..98f1d35b 100644
--- a/etc/README.md
+++ b/etc/README.md
@@ -328,28 +328,31 @@ contain package variable defaults, optionally the alphabetically sorted list of
 packages, if any, in ``<upper case group name>_PACKAGES``, and their package variables
 sorted alphabetically with the exception of ``${PKG_DEPENDS}`` (if present,)
 ``${PKG_SHA256SUM}``, ``${PKG_URL}``, and ``${PKG_VERSION}``, and/or ``${PKG_URLS_GIT}``,
-which are specified in this order.  
-  
-Additionally, single package files may be added beneath ``groups.d/[0-9][0-9][0-9].<group name>.d/``,
-named ``<package name>.package`` containing the package's variables, with one of the two following
-epilogues:
+which are specified in this order. Build group files require the following epilogue, the
+parameters enclosed in square brackets being optional:
 
 ```shell
-
-ex_pkg_register "<package_name>" "${RTL_FILEOP_SOURCE_FNAME}";
+ex_pkg_register_group "<group name>" "${RTL_FILEOP_SOURCE_FNAME}" [["owner|copy"] ["auto|noauto"]];
 
 # vim:filetype=sh textwidth=0
 ```
 
-or, if the group name should not be inferred automatically and explicitly set:
+If ``copy`` is specified, the build group will copy all of its packages from their respective
+build groups without taking ownership thereof, if ``owner`` is specified, the default, the build
+group owns all of its packages. If ``noauto`` is specified, the build group will not be added to
+the list of build groups to build by default, if ``auto`` is specified, the build group will be
+added to the list of build groups to build by default.  
+ 
+Additionally, single package files may be added beneath ``groups.d/[0-9][0-9][0-9].<group name>.d/``,
+named ``<package name>.package`` containing the package's variables, with the following epilogue,
+the parameters enclosed in square brackets being optional:
 
 ```shell
-
-ex_pkg_register "<package_name>" "${RTL_FILEOP_SOURCE_FNAME}" "<group name>";
+ex_pkg_register "<package_name>" "${RTL_FILEOP_SOURCE_FNAME}" ["<group name>"];
 
 # vim:filetype=sh textwidth=0
 ```
-  
+
 1. Pick a build group according to the criteria mentioned and specifiy the set of package
 variables required (see above and section [4.4](#44-package-variables)) in either the
 corresponding group file or a single package file; in the former case, do also add the
diff --git a/groups.d/dev_packages.group b/groups.d/dev_packages.group
index 13707405..c596224f 100644
--- a/groups.d/dev_packages.group
+++ b/groups.d/dev_packages.group
@@ -15,6 +15,6 @@ DEV_PACKAGES_PKG_CONFIG_LIBDIR="${PREFIX_NATIVE}/lib/pkgconfig";
 DEV_PACKAGES_PREFIX="${PREFIX_NATIVE}";
 DEV_PACKAGES_PYTHON="${PREFIX}/bin/python2";
 
-ex_pkg_register_group "dev_packages" "${RTL_FILEOP_SOURCE_FNAME}" "noauto";
+ex_pkg_register_group "dev_packages" "${RTL_FILEOP_SOURCE_FNAME}" "copy" "noauto";
 
 # vim:filetype=sh textwidth=0
diff --git a/subr.ex/ex_pkg.subr b/subr.ex/ex_pkg.subr
index 75f1aae8..c90515fb 100644
--- a/subr.ex/ex_pkg.subr
+++ b/subr.ex/ex_pkg.subr
@@ -299,6 +299,7 @@ ex_pkg_register() {
 # ex_pkg_register_group() - register single group
 # @_group_name:					single group name
 # @_fname:					pathname to file group is defined in, relative to midipix_build root
+# @[_ownerfl]:					"owner" for groups that own their packages, "copy" for shorthand groups referring to packages from other groups
 # @[_autofl]:					"auto" for groups to build by default, "noauto" for optional groups only built when requested
 # ${EXP_PKG_REGISTER_GROUP_RGROUPS}:		inout reference to variable of build groups
 # ${EXP_PKG_REGISTER_GROUP_RGROUPS_NOAUTO}:	inout reference to variable of build groups only built when requested
@@ -306,7 +307,8 @@ ex_pkg_register() {
 # Returns:		zero (0) on success, non-zero (>0) on failure.
 #
 ex_pkg_register_group() {
-	local	_eprg_group_name="${1}" _eprg_fname="${2}" _eprg_autofl="${3:-auto}"	\
+	local	_eprg_group_name="${1}" _eprg_fname="${2}"		\
+		_eprg_ownerfl="${3:-owner}" _eprg_autofl="${4:-auto}"	\
 		_eprg_pkg_name="" _eprg_pkg_names="" _eprg_rgroups="";
 
 	case "${_eprg_autofl}" in
@@ -318,17 +320,19 @@ ex_pkg_register_group() {
 		rtl_lconcat "${_eprg_rgroups}" "${_eprg_group_name}";
 	fi;
 
-	if rtl_get_var_unsafe \$_eprg_pkg_names -u "${_eprg_group_name}_PACKAGES"\
-	&& [ "${_eprg_pkg_names:+1}" = 1 ]; then
-		case "${_eprg_autofl}" in
-		auto)
+	case "${_eprg_ownerfl}" in
+	owner)
+		if rtl_get_var_unsafe \$_eprg_pkg_names -u "${_eprg_group_name}_PACKAGES"\
+		&& [ "${_eprg_pkg_names:+1}" = 1 ]; then
 			for _eprg_pkg_name in ${_eprg_pkg_names}; do
 				rtl_set_var_unsafe -u "PKG_${_eprg_pkg_name}_GROUP" "${_eprg_group_name}";
 				rtl_set_var_unsafe -u "PKG_${_eprg_pkg_name}_GROUP_FNAME" "${_eprg_fname}";
 			done;
-			;;
-		esac;
-	fi;
+		fi;
+		;;
+	copy)	;;
+	*)	;;
+	esac;
 
 	return 0;
 };