build: strip micro version if minor is even

To avoid manually adding the 3.4 stable version when doing the
release, check in configure if building a stable (even minor) version
and strip micro at that time.

configure.ac

@@ -18,6 +18,14 @@ PKG_PROG_PKG_CONFIG([0.22])
 
 GLIB_GSETTINGS
 
+SHELL_VERSION="$PACKAGE_VERSION"
+shell_major=`echo "$PACKAGE_VERSION" | cut -d'.' -f1`
+shell_minor=`echo "$PACKAGE_VERSION" | cut -d'.' -f2`
+if test "$(($shell_minor % 2))" -eq 0; then
+	SHELL_VERSION="$shell_major.$shell_minor"
+fi
+AC_SUBST([SHELL_VERSION])
+
 dnl keep this in alphabetic order
 dnl by default, install only extensions that do not change completely the shell experience,
 dnl that don't require GSettings and that don't require external packages for typelibs

extension.mk

@@ -11,7 +11,7 @@ metadata.json: metadata.json.in $(top_builddir)/config.status
 	    -e "s|[@]uuid@|$(uuid)|" \
 	    -e "s|[@]gschemaname@|$(gschemaname)|" \
 	    -e "s|[@]gettext_domain@|$(GETTEXT_PACKAGE)|" \
-	    -e "s|[@]shell_current@|$(PACKAGE_VERSION)|" \
+	    -e "s|[@]shell_current@|$(SHELL_VERSION)|" \
 	    -e "s|[@]url@|$(extensionurl)|" \
 	    $< > $@