Update SSH config to automatically add keys to agent.

Update ZSH config to automatically start the SSH agent.

stowers/ssh/dot-ssh/config

@@ -1,3 +1,11 @@
+#
+AddKeysToAgent yes
+UseKeychain yes
+
+Host localhost
+  UserKnownHostsFile /dev/null
+  StrictHostKeyChecking no
+
 ## --- Jupiter ---
 # -- Physical servers --
 Host jupiter-thebe-local

stowers/zsh/dot-zshrc

@@ -1,5 +1,6 @@
 # If you come from bash you might have to change your $PATH.
 # export PATH=$HOME/bin:/usr/local/bin:$PATH
+export PATH="${PATH}:${HOME}/.local/bin"
 
 # Path to your oh-my-zsh installation.
 export ZSH="$HOME/.oh-my-zsh"

stowers/zsh/dot-zshrc.d/02-ssh-agent.sh

@@ -1,3 +1,12 @@
 #!/bin/bash
 
-export SSH_AUTH_SOCK="${XDG_RUNTIME_DIR}/ssh-agent.socket"
+if [[ -z "${SSH_CONNECTION}" ]]; then
+    if ! pgrep -u "$USER" ssh-agent >/dev/null; then
+        ssh-agent > "$TMPDIR/ssh-agent.env"
+    fi
+
+    if [[ ! -f "${SSH_AUTH_SOCK}" ]]; then
+        source "$TMPDIR/ssh-agent.env" >/dev/null
+    fi
+fi
+