chore(cargo): cargo calls for any API

That way, it's so much easier to parallelize doc and test generation,
just to be sure it's truly working.

Makefile

@@ -27,6 +27,8 @@ help:
 	$(info api-deps     -   generate a file to tell make what API file dependencies will be)
 	$(info regen-apis   -   clear out all generated apis, and regenerate them)
 	$(info help-api     -   show all api targets to build individually)
+	$(info clean-apis   -   delete all generated APIs)
+	$(info cargo        -   run cargo on all APIs, use ARGS="args ..." to specify cargo arguments)
 	$(info license      -   regenerate the main license file)
 
 $(PYTHON):

src/mako/deps.mako

@@ -11,12 +11,15 @@
 	api_name = util.library_name(a.name, a.version)
 	api_common = gen_root + '/src/cmn.rs'
 	api_clean = api_name + '-clean'
+	api_cargo = api_name + '-cargo'
 	# source, destination of individual output files
 	sds = [(directories.mako_src + '/' + i.source + '.mako', gen_root + '/' + i.get('output_dir', '') + '/' + i.source) 
 																								for i in api.templates]
 	api_json = directories.api_base + '/' + a.name + '/' + a.version + '/' + a.name + '-api.json'
 	api_json_inputs = api_json + " $(API_SHARED_INFO)"
-	api_info.append((api_name, api_clean, gen_root))
+	api_info.append((api_name, api_clean, api_cargo, gen_root))
+
+	space_join = lambda i: ' '.join(a[i] for a in api_info)
 %>\
 ${api_common}: $(RUST_SRC)/cmn.rs $(lastword $(MAKEFILE_LIST))
 	@ echo "// COPY OF '$<'"  > $@
@@ -28,19 +31,24 @@ ${gen_root_stamp}: ${' '.join(i[0] for i in sds)} ${api_json_inputs} $(MAKO_LIB_
 	@touch $@
 
 ${api_name}: ${gen_root_stamp} ${api_common}
-	
+
+${api_cargo}: ${api_name}
+	cd ${gen_root} && cargo $(ARGS)
+
 ${api_clean}:
 	-rm -Rf ${gen_root}
 % endfor
 
-.PHONY += $(.PHONY) help-api clean-apis apis ${' '.join(a[0] for a in api_info)} ${' '.join(a[1] for a in api_info)}
+.PHONY += $(.PHONY) help-api clean-apis apis ${space_join(0)} ${space_join(1)} ${space_join(2)}
 
 help-api:
 	$(info apis       -    make all APIs)
 % for a in api_info:
 	$(info ${a[0]}    -    build the ${a[0]} api)
 	$(info ${a[1]}    -    clean all generated files of the ${a[0]} api)
+	$(info ${a[2]}    -    run cargo on the ${a[0]} api, using given ARGS="arg1 ...")
 % endfor
 
-clean-apis: ${' '.join(a[1] for a in api_info)}
-apis: ${' '.join(a[0] for a in api_info)}
+clean-apis: ${space_join(1)}
+cargo: ${space_join(2)}
+apis: ${space_join(0)}