add developper tool to keep only a subset of edt files in ./data/, the others...

add developper tool to keep only a subset of edt files in ./data/, the others will be backuped in ./data/backup/ folder

dev_tool.sh

+#!/bin/bash
+
+# This script move *.edt files in ./data/backup
+# Then mv back only the *.edt files whose login begins with a letter of your choice 
+
+if [ ! -d "./data/backup" ]; then
+    mkdir ./data/backup
+    echo ./data/backup/ created
+else
+    echo backup folder exists
+fi
+
+echo "On which data (sub-)set do you want to work on ?"
+echo "1) All"
+echo "2) logins begin with letter 'a'"
+echo "3) logins begin with other letter(s)"
+echo "0) Quit"
+echo "Nothing will be changed for all other inputs"
+echo "--------------------------------------------"
+echo "Your choice is ? "
+
+read dev_choice
+
+if [ $dev_choice == 3 ] ; then
+    echo "Which letter do you want ?"
+    read login_first_letter 
+    while [[ $login_first_letter != [a-z] ]]; do
+        echo "not a letter !! re-tape a letter pls"
+        read new_letter
+        login_first_letter=$new_letter
+    done
+fi
+
+case $dev_choice in
+    0) echo "nothing is changed ;-)" ; 
+        echo Bonne programmation ;; 
+    1) mv ./data/*.edt ./data/backup ; 
+        mv ./data/backup/*.edt ./data ; 
+        echo "Done : all *.edt are moved in ./data/" ;;
+    2) mv ./data/*.edt ./data/backup ; 
+        mv ./data/backup/a*.edt ./data/ ; 
+        echo "Done : all a*.edt are moved in ./data/";;
+    3) mv ./data/*.edt ./data/backup ; 
+        mv ./data/backup/$login_first_letter*.edt ./data/ ; 
+        echo "Done : all $login_first_letter*.edt are moved in ./data/ " ;;
+    *) echo "votre choix n'existe pas" ;
+        echo "-------------------------" ;
+        echo "nothing is changed ;-)" ;;
+esac