Use ~/.gitconfig.local for env specific settings

Signing key tooling, machine specific diff tools, etc

git/gitconfig

@@ -6,8 +6,6 @@
 [gpg]
   format = ssh
 
-[gpg "ssh"]
-  program = "/Applications/1Password.app/Contents/MacOS/op-ssh-sign"
 
 [commit]
   gpgsign = true
@@ -39,3 +37,6 @@
 
 [push]
 	autoSetupRemote = true
+
+[include]
+    path = ~/.gitconfig.local

git/makefile

@@ -8,6 +8,7 @@ include ../lib/shared.mk
 init:
 	$(report) header "Setting up gitconfig"
 	$(mk_link) $(SOURCE) $(TARGET)
+	touch $(TARGET).local
 
 up: init