Don't import ssh keys repeatedly

.bashrc

@@ -39,11 +39,13 @@ if [[ "${OSTYPE}" == "linux-gnu"* ]]; then
             sed -i '/^echo Agent pid.*/d' $HOME/.ssh/ssh-agent
        fi
        eval `\cat $HOME/.ssh/ssh-agent`
-    fi
 
-    for key in $(find "${HOME}/.ssh" -type f -name "*.pub"); do
-        ssh-add -q "${key%.*}"
-    done
+        for key in $(find "${HOME}/.ssh" -type f -name "*.pub"); do
+            # Don't add if a key with this fingerprint is already in the agent.
+            fp="$(ssh-keygen -lf "${key%.*}"  | awk '{print $2}')"
+            ssh-add -l |grep -q "${fp}" || ssh-add -q "${key%.*}"
+        done
+    fi
 
 #    bind -x '"\C-r"':reset
 fi