conf: Generate and install config sippets for option descriptions

The strongswan.d directory is also created relative to the configured
location of strongswan.conf.

conf/.gitignore

@@ -0,0 +1,3 @@
+default.conf
+*/*.conf
+*/*.tmp

conf/Makefile.am

@@ -1,6 +1,63 @@
-EXTRA_DIST = strongswan.conf
+# make this relative to the location of strongswan.conf
+strongswanconfdir = `dirname $(strongswan_conf)`
+strongswanddir = $(strongswanconfdir)/strongswan.d
+charonconfdir = $(strongswanddir)/charon
 
-install-exec-local :
-		test -e "$(DESTDIR)${sysconfdir}" || $(INSTALL) -d "$(DESTDIR)$(sysconfdir)"
-		test -e "$(DESTDIR)$(sysconfdir)/strongswan.conf" || $(INSTALL) -m 640 $(srcdir)/strongswan.conf $(DESTDIR)$(sysconfdir)/strongswan.conf || true
-		test -e "$(DESTDIR)${sysconfdir}/strongswan.d" || $(INSTALL) -d "$(DESTDIR)$(sysconfdir)/strongswan.d"
+options = \
+	options/charon.opt
+
+plugins = \
+	plugins/test.opt
+
+alloptions = $(options) $(plugins)
+
+confsnippets = $(alloptions:opt=conf)
+
+# we only install snippets for enabled plugins
+plugins_install_tmp = $(charon_plugins:%=plugins/%.tmp)
+plugins_install_src = $(charon_plugins:%=plugins/%.conf)
+
+strongswand_DATA = $(options:opt=conf)
+charonconf_DATA = $(plugins_install_src)
+
+BUILT_SOURCES = default.conf $(confsnippets)
+EXTRA_DIST = format-options.py strongswan.conf default.opt \
+	default.conf $(alloptions) $(confsnippets)
+
+.opt.conf:
+	$(AM_V_GEN) \
+	case "$<" in \
+	*plugins/*) \
+		sed \
+		-e "s:\@PLUGIN_NAME\@:`basename $< .opt`:" \
+		$(srcdir)/default.opt | cat - $< | \
+		$(PYTHON) $(srcdir)/format-options.py -f conf -r charon.plugins > $(srcdir)/$@ \
+		;; \
+	*) \
+		$(PYTHON) $(srcdir)/format-options.py -f conf -r charon.plugins $< > $(srcdir)/$@ \
+		;; \
+	esac
+
+# we need another implicit rule to generate files from the generic template only
+# if the rules above did not catch it.  this requires an intermediate step that
+# generates a copy of the generic config template.
+$(plugins_install_tmp):
+	@cp $(srcdir)/default.conf $(srcdir)/$@
+
+.tmp.conf:
+	$(AM_V_GEN) \
+	sed \
+	-e "s:\@PLUGIN_NAME\@:`basename $< .tmp`:" \
+	$(srcdir)/$< > $(srcdir)/$@
+
+maintainer-clean-local:
+	cd $(srcdir) && \
+		rm -f $(confsnippets) default.conf plugins/*.conf plugins/*.tmp
+
+install-exec-local:
+	test -e "$(DESTDIR)${strongswanconfdir}" || $(INSTALL) -d "$(DESTDIR)$(strongswanconfdir)"
+	test -e "$(DESTDIR)$(strongswanconfdir)/strongswan.conf" || $(INSTALL) -m 640 $(srcdir)/strongswan.conf $(DESTDIR)$(strongswanconfdir)/strongswan.conf || true
+
+install-data-hook:
+	chmod 0640 $(DESTDIR)$(strongswanddir)/*.conf
+	chmod 0640 $(DESTDIR)$(charonconfdir)/*.conf

conf/default.opt

@@ -0,0 +1,3 @@
+charon.plugins.@PLUGIN_NAME@.load := yes
+	Whether to load the plugin. Can also be an integer to increase the priority
+	of this plugin.

conf/options/charon.opt

@@ -0,0 +1,2 @@
+charon.threads = 16
+	Number of threads

conf/plugins/test.opt

@@ -0,0 +1,30 @@
+charon.plugins.test.opt
+	This is a normal option without default
+
+charon.plugins.test.noncomment := set this
+	This will not be commented out
+
+charon.plugins.test.def = default
+	Option with default
+
+charon.plugins.test.sectionnocomment.opt = val
+	The section this is in has no description
+
+charon.plugins.test.sub {}
+	This section has comments
+
+charon.plugins.test.sub.opt = option in sub
+	Section option
+
+charon.plugins.test.<commented> { # }
+	Commented example section
+
+charon.plugins.test.<commented>.val = value
+	This is commented anyway
+
+charon.plugins.test.<commented>.assign := value
+	This is commented too because of the commented section
+
+charon.plugins.test.sub = value
+	Sections can also be options with values
+	Longer description with **bold** and _italic_.

conf/strongswan.conf

@@ -5,8 +5,9 @@
 # Configuration changes should be made in the included files
 
 charon {
+	load_modular = yes
 	plugins {
-
+		include strongswan.d/charon/*.conf
 	}
 }
 

configure.ac

@@ -302,6 +302,7 @@ AC_PROG_EGREP
 AC_PROG_AWK
 AC_PROG_LEX
 AC_PROG_YACC
+AM_PATH_PYTHON(,,[:])
 AC_PATH_PROG([PERL], [perl], [], [$PATH:/bin:/usr/bin:/usr/local/bin])
 AC_PATH_PROG([GPERF], [gperf], [], [$PATH:/bin:/usr/bin:/usr/local/bin])