Add ssh-agent service and ssh config

Add a systemd user service to start the ssh-agent and add an ssh
config to automatically add ssh identities to the agent when they
are used (otherwise we have to add them manually). I will see how
this works out.

See: https://wiki.archlinux.org/title/SSH_keys#SSH_agents

config.yaml

@@ -63,6 +63,12 @@ dotfiles:
   d_local_bin:
     src: local/bin
     dst: ~/.local/bin
+  f_ssh_config:
+    src: ssh/config
+    dst: ~/.ssh/config
+  f_ssh-agent.service:
+    src: config/systemd/user/ssh-agent.service
+    dst: ~/.config/systemd/user/ssh-agent.service
 profiles:
   everywhere:
     dotfiles:
@@ -90,6 +96,7 @@ profiles:
     - f_pam_environment
     - f_xdg_desktop_portal_wlr_config
     - d_local_bin
+    - f_ssh-agent.service
   knafeh:
     dotfiles:
     - d_vim
@@ -111,3 +118,4 @@ profiles:
     - f_xdg_desktop_portal_wlr_config
     - f_geoclue-agent.service
     - d_local_bin
+    - f_ssh-agent.service

dotfiles/config/systemd/user/ssh-agent.service

@@ -0,0 +1,13 @@
+# From: https://wiki.archlinux.org/title/SSH_keys#SSH_agents
+[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

dotfiles/ssh/config

@@ -0,0 +1 @@
+AddKeysToAgent yes

dotfiles/zshrc

@@ -37,7 +37,6 @@ if [[ "$OSTYPE" =~ ^linux.*$ ]]; then
         # 2021-06-22: fix "Firefox is already running" message
         # See: https://mastransky.wordpress.com/2020/03/16/wayland-x11-how-to-run-firefox-in-mixed-environment/
         export MOZ_DBUS_REMOTE=1
-        export KITTY_ENABLE_WAYLAND=1
         export QT_QPA_PLATFORM=wayland-egl
         export CLUTTER_BACKEND=wayland
         # 2020-02-10: https://github.com/swaywm/sway/wiki#issues-with-java-applications
@@ -49,10 +48,6 @@ fi
 {%@@ if profile == "balozi" @@%}
 # Enable asdf version manager zsh completions
 . /opt/asdf-vm/asdf.sh
-# Enable setting JAVA_HOME, requires the asdf-java plugin installed for this
-# user. Currently disabled because it adds a noticeable lag to the shell
-# See: https://github.com/halcyon/asdf-java 
-#. ~/.asdf/plugins/java/set-java-home.zsh
 {%@@ endif @@%}
 
 alias ls='ls -F --color=auto'
@@ -62,7 +57,6 @@ alias less='less -R' # preserves colors in GNU coreutils' `less`
 # see: https://github.com/jan-warchol/selenized/tree/master/other-apps/dircolors
 export LS_COLORS="$LS_COLORS:ow=1;7;34:st=30;44:su=30;41"
 
-
 # Environment
 export PS1='[%n@%m: %~]$ '
 export EDITOR=vim
@@ -103,6 +97,8 @@ export GPG_TTY=$(tty)
 # Refresh gpg-agent tty in case user switches into an X Session
 gpg-connect-agent updatestartuptty /bye >/dev/null
 
+export SSH_AUTH_SOCK="$XDG_RUNTIME_DIR/ssh-agent.socket"
+
 # Speed up JVM start for short-lived Java programs
 # See: https://zeroturnaround.com/rebellabs/your-maven-build-is-slow-speed-it-up/
 export MAVEN_OPTS="-XX:+TieredCompilation -XX:TieredStopAtLevel=1"