add encrypted mail password

modules/mail/himalaya.nix

@@ -11,6 +11,8 @@
 
     home-manager.users.${config.user} = {
 
+      home.packages = with pkgs; [ age ];
+
       programs.himalaya = { enable = true; };
 
       accounts.email = {
@@ -59,7 +61,9 @@
             mu.enable = false;
             notmuch.enable = false;
             passwordCommand =
-              "cat /home/${config.user}/.config/himalaya/passwd";
+              "${pkgs.age}/bin/age --decrypt --identity /home/${config.user}/.ssh/id_rsa ${
+                builtins.toString ./mailpass.age
+              }";
             smtp = {
               host = serverHostname;
               port = 587;

modules/mail/mailpass.age

@@ -0,0 +1,10 @@
+age-encryption.org/v1
+-> ssh-rsa 6vVbxg
+X7xJSc42VFglgjPxz45J3uoGtyZZdI6qyIEL+ZKxzhgYTa66/LVhJT/sLJlg7lnp
+DoZCGEvVIrTzlysHeWvNKUIkK/iiRLdsqJybPWs/hai9J2q3OcXehbvU+adHhhxn
+7y3Ycle+XeQ2QnFtMZBL0niQNAo3CMNKO6SNQeFwzwGgHmPmAF2JVnwxB5l09Y+e
+12T6aQCuh1pZ7oRjFQHg3T1aqXcslyBLLNuT4CXkIQ4hXSPAJGHUcy+rj8+3NsXW
+BwI7w3CtBLGDaZue6FBucD3ii4lIcBtUzx9BsgHfsrHPvgx8jAt6cLyWmMFwQO0Y
+43zNsHUHok2GEzKE1zLcAA
+--- HyCGtqqnrN0ukBo11RTE7l3HUvT2o+qxvlghoY0cY80
+:<3A>Eln<6C><<3C>2029I70J/Za<5A>\<5C>{<7B><>{<7B>X3<05><><EFBFBD>!<21><>B<08>q<><1B>D<EFBFBD>:gÇ<67>G~W<><18>I<EFBFBD>vWjm