add configs and memos about gpg

config/shell/.config/fish/conf.d/10-sshs.fish

@@ -1,6 +1,13 @@
 # ssh with encrypted private keys
-# $ssh_keys should be set in advance or left empty to use the default keys
-if type -q ssh
+# $ssh_key_hashes should be set in advance or left empty to use the default keys
+
+if set -q ENABLE_GPG_AGENT_SSH; and test $ENABLE_GPG_AGENT_SSH != "0";\
+   and type -q gpg-init; and type -q gpgconf
+    # GPG agent for SSH
+    bass $(gpg-init) > /dev/null 2>&1
+
+else if type -q ssh-init; and type -q ssh-add
+    # SSH with cross-session ssh-agent
     bass $(ssh-init) > /dev/null 2>&1
 
     # avoid entering passphrase every time