Generate actions from a text file

Mostly because I wanted to nest preprocessing.

This makes the build more complex and slightly less portable,
but the code itself is much cleaner.

CMakeLists.txt

@@ -90,8 +90,22 @@ configure_file (${PROJECT_SOURCE_DIR}/config.h.in
 	${PROJECT_BINARY_DIR}/config.h)
 include_directories (${PROJECT_SOURCE_DIR} ${PROJECT_BINARY_DIR})
 
+# Assuming a Unix-compatible system with a standalone preprocessor
+set (actions ${PROJECT_BINARY_DIR}/nncmpp-actions.h)
+add_custom_command (OUTPUT ${actions}
+	COMMAND cpp -I${PROJECT_BINARY_DIR} -P ${PROJECT_SOURCE_DIR}/nncmpp.actions
+		| grep . | tr [[\n]] [[\t]] | sed -ne [[y/\t/\n/]] > ${actions}
+			-e [[h; s/,[^\n]*/,/g]] -e [[s/$/COUNT/]]
+			-e [[s/[^\n]*/\tACTION_&/g]] -e [[s/.*/enum action {\n&\n};\n/p]]
+			-e [[g; s/,[^\n]*//g; y/_/-/]] -e [[s/[^\n]\{1,\}/\t"&",/g]]
+			-e [[s/.*/static const char *g_action_names[] = {\n&};\n/p]]
+			-e [[g; s/[^\n]*, //g;]] -e [[s/[^\n]\{1,\}/\t"&",/g]]
+			-e [[s/.*/static const char *g_action_descriptions[] = {\n&};/p]]
+	COMMAND test -s ${actions}
+	DEPENDS ${PROJECT_BINARY_DIR}/config.h VERBATIM)
+
 # Build the main executable and link it
-add_executable (${PROJECT_NAME} ${PROJECT_NAME}.c)
+add_executable (${PROJECT_NAME} ${PROJECT_NAME}.c ${actions})
 target_link_libraries (${PROJECT_NAME} ${Unistring_LIBRARIES}
 	${Ncursesw_LIBRARIES} termo-static ${curl_LIBRARIES} ${extra_libraries})
 add_threads (${PROJECT_NAME})