Add `crypt` subcommand to migrate from outside the subdirectory

gocrypt.bash

@@ -79,6 +79,14 @@ gocrypt_delegate() {
     pass git commit -m "Encrypted pass operation inside gocrypt" "$gocrypt_dir" || echo "No git commit created"
 }
 
+gocrypt_crypt() {
+    gocrypt_open_check
+    [ ! -f "$1.gpg" ] && gocrypt_die "Not found: $1"
+    cmd_show "$1" | EDITOR=tee gocrypt_delegate edit "$1"
+    cmd_delete -f "$1"
+    echo "Moved $1 into encrypted storage"
+}
+
 gocrypt_help() {
     printf "%s" "\
 $PROGRAM gocrypt - hide part of the password store in a subdirectory encrypted with gocryptfs
@@ -100,6 +108,11 @@ usage
     $PROGRAM gocrypt close
         Unmount the encrypted subtree, if it was opened before.
 
+    $PROGRAM gocrypt crypt <pass_name>
+        Move a password <pass_name> from the original password store to the encrypted subdirectory. Note
+        that if you use git, this will still leave a record in the git repository of the original password
+        store.
+
     $PROGRAM gocrypt help
         Print this help message.
 
@@ -145,6 +158,10 @@ case "$1" in
         shift
         gocrypt_open $@
         ;;
+    crypt)
+        shift
+        gocrypt_crypt $@
+        ;;
     close)
         shift
         gocrypt_close $@