epm(): allow use it when run with pipe

bin/epm-epm_install

@@ -25,7 +25,7 @@ load_helper epm-install
 check_url_is_accessible()
 {
     local res
-    epm tool eget --check "$1"
+    eget --check "$1"
 }
 
 # update URL variable

bin/epm-sh-functions

@@ -280,8 +280,12 @@ clean_store_output()
 # run epm, possible from side repo
 epm()
 {
-	[ -n "$PROGNAME" ] || fatal "Can't use epm call from the piped script"
-	bash $PROGDIR/$PROGNAME --inscript "$@"
+	if [ -n "$PROGNAME" ] ; then
+		#|| fatal "Can't use epm call from the piped script"
+		bash $PROGDIR/$PROGNAME --inscript "$@"
+	else
+		epm_main --inscript "$@"
+	fi
 }
 
 # run $SUDO epm, possible from side repo