improve load_helper to skip repeated include

bin/epm

@@ -47,9 +47,14 @@ fi
 
 load_helper()
 {
+    local shieldname="loaded$(echo "$1" | sed -e 's|-||g')"
+    # already loaded
+    eval "test -n \"\$$shieldname\"" && debug "Already loaded $1" && return
+
     local CMD="$SHAREDIR/$1"
     # do not use fatal() here, it can be initial state
     [ -r "$CMD" ] || { echo "FATAL: Have no $CMD helper file" ; exit 1; }
+    eval "$shieldname=1"
     # shellcheck disable=SC1090
     . $CMD
 }

bin/esu

@@ -33,13 +33,20 @@ SHAREDIR=$PROGDIR
 
 load_helper()
 {
+    local shieldname="loaded$(echo "$1" | sed -e 's|-||g')"
+    # already loaded
+    eval "test -n \"\$$shieldname\"" && debug "Already loaded $1" && return
+
     local CMD="$SHAREDIR/$1"
     # do not use fatal() here, it can be initial state
     [ -r "$CMD" ] || { echo "FATAL: Have no $CMD helper file" ; exit 1; }
+    eval "$shieldname=1"
     # shellcheck disable=SC1090
     . $CMD
 }
 
+load_helper epm-sh-functions
+
 esu_print_help()
 {
     cat <<EOF
@@ -49,7 +56,6 @@ EOF
 }
 
 
-load_helper epm-sh-functions
 
 if [ "$1" = "-h" ] || [ "$1" = "--help" ] ; then
     esu_print_help

bin/serv

@@ -48,11 +48,19 @@ fi
 
 load_helper()
 {
+    local shieldname="loaded$(echo "$1" | sed -e 's|-||g')"
+    # already loaded
+    eval "test -n \"\$$shieldname\"" && debug "Already loaded $1" && return
+
     local CMD="$SHAREDIR/$1"
-    [ -r "$CMD" ] || fatal "Have no $CMD helper file"
+    # do not use fatal() here, it can be initial state
+    [ -r "$CMD" ] || { echo "FATAL: Have no $CMD helper file" ; exit 1; }
+    eval "$shieldname=1"
+    # shellcheck disable=SC1090
     . $CMD
 }
 
+
 load_helper epm-sh-functions
 
 INITDIR=/etc/init.d