epm: allow use $EGET in prescription scripts

bin/epm-prescription

@@ -36,6 +36,9 @@ if [ ! -x "$script" ] ; then
     fatal "Can't find $script prescription."
 fi
 
+# allow use EGET in the scripts
+__set_EGET
+
 info "Running $($script --description) ..."
 docmd $script --run
 

bin/epm-sh-functions

@@ -383,6 +383,20 @@ assure_exists()
 	( direct='' epm_assure "$1" $package $3 ) || fatal "Can't assure in '$1' command from $package$textpackage package"
 }
 
+__set_EGET()
+{
+	# use internal eget only if exists
+	if [ -s $SHAREDIR/tools_eget ] ; then
+		export EGET="$SHAREDIR/tools_eget"
+		return
+	fi
+
+	# FIXME: we need disable output here, eget can be used for get output
+	assure_exists eget >/dev/null
+	# use external command, not the function
+	export EGET="$(which eget)" || fatal "Missed command eget from installed package eget"
+}
+
 # will replaced within disabled_eget in packaged version
 eget()
 {