fix migration from symfony 3 to 5 script

tools/migrations/migrate_from_symfony_3_to_5.sh

-#!/bin/bash
-BASE_DIR=$(realpath "$(dirname $0)/../..")
+#!/usr/bin/env bash
+BASE_DIR=$PWD
 source $BASE_DIR/.env
 
 BACKUP_DB="${MYSQL_DATABASE}_BACKUP_3_TO_5"
@@ -18,9 +18,7 @@ if [ "$backup" -ne 0 ]; then
     echo "Creating DB $BACKUP_DB"
     $mysql_cmd -e "CREATE DATABASE $BACKUP_DB"
     echo "Saving $MYSQL_DATABASE to $BACKUP_DB"
-    docker-compose exec mysql mysqldump -u root -p$MYSQL_ROOT_PASSWORD $MYSQL_DATABASE |\
-        grep -v Warning |
-        docker exec -i $(docker-compose ps -q mysql) mysql -u root -p$MYSQL_ROOT_PASSWORD $BACKUP_DB
+    docker-compose exec -e BACKUP_DB=$BACKUP_DB mysql bash -c 'mysqldump -u root -p$MYSQL_ROOT_PASSWORD $MYSQL_DATABASE | grep -v Warning | mysql -u root -p$MYSQL_ROOT_PASSWORD $BACKUP_DB'
     ret=$?
     if [ $ret -ne 0 ]; then
         echo "Backup failed, aborting"
@@ -54,13 +52,11 @@ COLUMNS_REPLACEMENTS[user]="roles,\(.*\)credential_expired/'[\"USER_ROLE\"]' as
 # Old capsule table does not have a password field
 COLUMNS_REPLACEMENTS[capsule]='password/SUBSTRING(edition_link, -40) as password/'
 
-TABLES="user reset_password_request capsule doctrine_migration_versions editeur_capsule"
+TABLES="user capsule editeur_capsule"
 echo "SET foreign_key_checks = 0;" > $$.sql
+
 for table in $TABLES; do
-    COLUMNS=$($mysql_cmd --batch --disable-column-names \
-        -e "SELECT COLUMN_NAME FROM INFORMATION_SCHEMA.COLUMNS WHERE TABLE_NAME = '$table' AND TABLE_SCHEMA='$MYSQL_DATABASE'" |\
-        grep -v "Warning" | tr '\r\n' ', ' | sed 's/, $//'
-    )
+    COLUMNS=$(docker-compose exec -T -e TABLE=$table mysql bash -c 'mysql -u root -p$MYSQL_ROOT_PASSWORD --batch --disable-column-names -e "SELECT COLUMN_NAME FROM INFORMATION_SCHEMA.COLUMNS WHERE TABLE_NAME = \"$TABLE\" AND TABLE_SCHEMA=\"$MYSQL_DATABASE\"" | grep -v "Warning" | tr -d "\r" | tr "\n" ", " | sed "s/,\$//"')
     if [ ! -z "${COLUMNS_REPLACEMENTS[$table]}" ]; then
         COLUMNS_OLD=$(echo $COLUMNS | sed "s/${COLUMNS_REPLACEMENTS[$table]}")
     else
@@ -69,9 +65,10 @@ for table in $TABLES; do
     echo "DELETE FROM $MYSQL_DATABASE.$table;" >> $$.sql
     echo "INSERT INTO $MYSQL_DATABASE.$table ($COLUMNS) SELECT $COLUMNS_OLD FROM $BACKUP_DB.$table;" >> $$.sql
 done
+
 # Ensure that dt_maj is not NULL
 echo "UPDATE $MYSQL_DATABASE.capsule SET dt_maj=dt_crea WHERE dt_maj IS NULL;" >> $$.sql
 echo "SET foreign_key_checks = 1;" >> $$.sql
 cat $$.sql | docker exec -i $(docker-compose ps -q mysql) mysql -u root -p$MYSQL_ROOT_PASSWORD
 echo "All done"
-rm $$.sql
+# rm $$.sql