improve makefile support for submodules

Makefile

@@ -1,8 +1,10 @@
 SHELL=/bin/bash
 
+
 build: submodules resh-collect resh-daemon
 
-install: build $(HOME)/.resh $(HOME)/.resh/bin
+
+install: build | $(HOME)/.resh $(HOME)/.resh/bin
 	cp submodules/bash-preexec/bash-preexec.sh ~/.bash-preexec.sh -f
 	cp bashrc.sh ~/.resh/bashrc -f
 	cp resh-* ~/.resh/bin/ -f
@@ -29,9 +31,16 @@ $(HOME)/.resh/bin:
 
 .PHONY: submodules build install
 
-submodules: submodules/bash-preexec/bash-preexec.sh
-	# this is always run and updates submodules
-	git submodule update --recursive
+submodules: | submodules/bash-preexec/bash-preexec.sh
+	@# sets submodule.recurse to true if unset
+	@# sets status.submoduleSummary to true if unset
+	@git config --get submodule.recurse >/dev/null || git config --global submodule.recurse true
+	@git config --get status.submoduleSummary >/dev/null || git config --global status.submoduleSummary true
+	@git config --get diff.submodule >/dev/null || git config --global diff.submodule log
+	@# warns user if submodule.recurse is not set to true
+	@[[ "true" == `git config --get submodule.recurse` ]] || echo "WARN: You should REALLY set 'git config --global submodule.recurse true'!"
+	@#git config --global push.recurseSubmodules check
 
 submodules/%:
-	git submodule init
+	git submodule sync --recursive 
+	git submodule update --init --recursive