vici: Make installation of Ruby Gem and Python Egg optional

Installing them might not work well when building distro packages (e.g.
with DESTDIR installs).  It might be easier to install them later with a
script in the distro package.

When building from source on the local system it could still be useful to
install the packages directly, which can be enabled with separate configure
options.

The main problem with DESTDIR installations of the Python Egg is that
easy_install creates or modifies a file called easy-install.pth in the
installation directory.  So it's not actually possible to simply copy
the results in DESTDIR over to the actual system as that file would have
to be merged with any existing one.

Fixes #914.

configure.ac

@@ -291,8 +291,10 @@ ARG_ENABL_SET([integrity-test], [enable integrity testing of libstrongswan and p
 ARG_DISBL_SET([load-warning],   [disable the charon plugin load option warning in starter.])
 ARG_ENABL_SET([mediation],      [enable IKEv2 Mediation Extension.])
 ARG_ENABL_SET([unwind-backtraces],[use libunwind to create backtraces for memory leaks and segfaults.])
-ARG_ENABL_SET([ruby-gems],      [enable installation of provided ruby gems.])
+ARG_ENABL_SET([ruby-gems],      [enable build of provided ruby gems.])
-ARG_ENABL_SET([python-eggs],    [enable installation of provided python eggs.])
+ARG_ENABL_SET([ruby-gems-install],[enable installation of provided ruby gems.])
+ARG_ENABL_SET([python-eggs],    [enable build of provided python eggs.])
+ARG_ENABL_SET([python-eggs-install],[enable installation of provided python eggs.])
 # compile options
 ARG_ENABL_SET([coverage],       [enable lcov coverage report generation.])
 ARG_ENABL_SET([leak-detective], [enable malloc hooks to find memory leaks.])
@@ -433,6 +435,14 @@ if test x$medcli = xtrue; then
 	mediation=true
 fi
 
+if test x$ruby_gems_install = xtrue; then
+	ruby_gems=true
+fi
+
+if test x$python_eggs_install = xtrue; then
+	python_eggs=true
+fi
+
 # ===========================================
 #  check required libraries and header files
 # ===========================================
@@ -1199,11 +1209,14 @@ if test x$ruby_gems = xtrue; then
 	fi
 	AC_SUBST(RUBYGEMDIR, "$rubygemdir")
 fi
+AM_CONDITIONAL(RUBY_GEMS_INSTALL, [test "x$ruby_gems_install" = xtrue])
 
 if test x$python_eggs = xtrue; then
-	AC_PATH_PROG([EASY_INSTALL], [easy_install], [], [$PATH:/bin:/usr/bin:/usr/local/bin])
+	if test x$python_eggs_install = xtrue; then
-	if test x$EASY_INSTALL = x; then
+		AC_PATH_PROG([EASY_INSTALL], [easy_install], [], [$PATH:/bin:/usr/bin:/usr/local/bin])
-		AC_MSG_ERROR(Python easy_install not found)
+		if test x$EASY_INSTALL = x; then
+			AC_MSG_ERROR(Python easy_install not found)
+		fi
 	fi
 	if test "x$pythoneggdir" = "xmain site-packages directory"; then
 		AC_SUBST(PYTHONEGGINSTALLDIR, "")
@@ -1212,6 +1225,7 @@ if test x$python_eggs = xtrue; then
 	fi
 	AC_PATH_PROG([PY_TEST], [py.test], [], [$PATH:/bin:/usr/bin:/usr/local/bin])
 fi
+AM_CONDITIONAL(PYTHON_EGGS_INSTALL, [test "x$python_eggs_install" = xtrue])
 
 # ===============================================
 #  collect plugin list for strongSwan components

src/libcharon/plugins/vici/python/Makefile.am

@@ -24,9 +24,11 @@ clean-local:
 	(cd $(srcdir); [ ! -f setup.py ] || $(PYTHON) setup.py clean -a)
 	rm -rf $(srcdir)/setup.py $(srcdir)/vici.egg-info $(builddir)/dist
 
+if PYTHON_EGGS_INSTALL
 install-exec-local: dist/vici-$(PACKAGE_VERSION)-py$(PYTHON_VERSION).egg
 	$(EASY_INSTALL) $(PYTHONEGGINSTALLDIR) \
 		dist/vici-$(PACKAGE_VERSION)-py$(PYTHON_VERSION).egg
+endif
 
 if USE_PY_TEST
   TESTS = $(PY_TEST)

src/libcharon/plugins/vici/ruby/Makefile.am

@@ -15,6 +15,7 @@ all-local: vici-$(PACKAGE_VERSION).gem
 clean-local:
 	rm -f vici.gemspec vici-$(PACKAGE_VERSION).gem
 
+if RUBY_GEMS_INSTALL
 install-data-local: vici-$(PACKAGE_VERSION).gem
 	$(GEM) install --install-dir $(DESTDIR)$(RUBYGEMDIR) \
 		vici-$(PACKAGE_VERSION).gem
@@ -22,3 +23,4 @@ install-data-local: vici-$(PACKAGE_VERSION).gem
 uninstall-local:
 	$(GEM) uninstall --install-dir $(DESTDIR)$(RUBYGEMDIR) \
 		--version $(PACKAGE_VERSION) vici
+endif