Use SSH agent config and passphrase caching

tongfang/.bash_aliases

@@ -1,4 +1,5 @@
 alias ll='ls -la'
 alias lt='ls --human-readable --size -1 -S --classify'
 alias nrebuild='sudo nixos-rebuild --use-remote-sudo switch'
-alias code='codium'
+alias code='codium'
+alias ssh='ensure_ssh_key; ssh'

tongfang/.bashrc

@@ -10,5 +10,15 @@ if command -v rg > /dev/null; then
     source <(rg --generate=complete-bash)
 fi
 
+if [ -z "$SSH_AUTH_SOCK" ]; then
+    eval $(ssh-agent -s) &>/dev/null
+fi
+
+function ensure_ssh_key {
+    if ! ssh-add -l &>/dev/null; then
+        ssh-add -t 3600 ~/.ssh/id_ed25519
+    fi
+}
+
 PROMPT_DIRTRIM=2
 PS1='\[\033[0;33m\][\u@\h:\w]\$\[\033[0m\] '