add ssh-agent setup for linux

README.md

@@ -90,6 +90,7 @@ pamac install \
 # not available by default
 #jc mbuffer
 pamac build lightly-qt
+systemctl enable --now --user ssh-agent.service
 ```
 
 # Bitwarden

dot_config/bash/ssh-agent.sh.tmpl

@@ -0,0 +1,4 @@
+{{- if (eq .chezmoi.os "linux") -}}
+SSH_AUTH_SOCK="$XDG_RUNTIME_DIR/ssh-agent.socket"
+export SSH_AUTH_SOCK
+{{- end -}}

dot_config/systemd/user/ssh-agent.service.tmpl

@@ -0,0 +1,14 @@
+{{- if (eq .chezmoi.os "linux") -}}
+[Unit]
+Description=SSH key agent
+
+[Service]
+Type=simple
+Environment=SSH_AUTH_SOCK=%t/ssh-agent.socket
+# DISPLAY required for ssh-askpass to work
+Environment=DISPLAY=:0
+ExecStart=/usr/bin/ssh-agent -D -a $SSH_AUTH_SOCK
+
+[Install]
+WantedBy=default.target
+{{- end -}}