fix ssh agent on wsl

.zshrc

@@ -70,4 +70,16 @@ alias getunicode="perl -C7 -ne 'for(split(//)){print sprintf(\"U\+\%04X\", ord).
 alias mkenv="python3.7 -m venv .env && source .env/bin/activate"
 alias senv="source .env/bin/activate"
 
+if [ -z "$SSH_AUTH_SOCK" ]
+then
+   # Check for a currently running instance of the agent
+   RUNNING_AGENT="`ps -ax | grep 'ssh-agent -s' | grep -v grep | wc -l | tr -d '[:space:]'`"
+   if [ "$RUNNING_AGENT" = "0" ]
+   then
+        # Launch a new instance of the agent
+        ssh-agent -s &> ~/.ssh/ssh-agent
+   fi
+   eval `cat ~/.ssh/ssh-agent`
+fi
+
 prompt_context() {}