sekrit: don't define a default SEKRIT_GPG_ID

And abort operation if no SEKRIT_GPG_ID is provided.

bin/sekrit.1

@@ -10,7 +10,7 @@
 .\" Dedication along with this software. If not, see
 .\" <http://creativecommons.org/publicdomain/zero/1.0/>.
 .\"
-.Dd May 25, 2020
+.Dd August 26, 2020
 .Dt SEKRIT 1
 .Os
 .Sh NAME
@@ -117,8 +117,9 @@ Defaults to
 .Pa ~/keep/sekrit .
 .It Ev SEKRIT_GPG_ID
 The recipient to whom encrypt the files.
-Defaults to
-.Ar myself .
+Must be set for
+.Nm
+to work.
 .El
 .Sh EXIT STATUS
 .Ex -std

bin/sekrit.sh

@@ -193,9 +193,10 @@ shift
 
 umask 077
 : ${SEKRIT_DIR:=~/keep/sekrit}
-: ${SEKRIT_GPG_ID:=myself}
 mkdir -p "$SEKRIT_DIR"
 
+[ -n "$SEKRIT_GPG_ID" ] || err "SEKRIT_GPG_ID is empty"
+
 case "$cmd" in
 add)	sekrit_add "$@" ;;
 cp)	sekrit_cp "$@" ;;