add scripts for treewide mainProgram

treewideMainProgram/ed_main_program.sh

@@ -0,0 +1,15 @@
+#!/usr/bin/env bash
+
+PACKAGE_PATH=$1
+PACKAGE_NAME=$1
+
+if [ -f $1 ]; then
+  PACKAGE_NAME=$(dirname $PACKAGE_NAME)
+else
+  PACKAGE_PATH="${PACKAGE_PATH%%/}/default.nix"
+fi
+
+PACKAGE_NAME="${PACKAGE_NAME%/}"
+PACKAGE_NAME="${PACKAGE_NAME##*/}"
+
+NVIM_CLIPBOARD="mainProgram = \"$PACKAGE_NAME\";" nvim $PACKAGE_PATH