modified develop_academy.sh to compile dev only once when changed

scripts/develop_academy.sh

@@ -39,17 +39,42 @@ if ! command -v nvm &> /dev/null; then
   source $NVM_DIR/nvm.sh;
 fi
 
-# Prepare yarn 
-if ! command -v yarn --version &> /dev/null; then
-  npm install --global yarn
-fi
-
 # Prepare the frontend
 nvm install 16
 nvm use 16
+
+# Checking if the frontend needs compilation
 cd react_frontend/
-yarn install
-yarn build
+DIRECTORY_TO_MONITOR="."
+
+checksum=$(find "$DIRECTORY_TO_MONITOR" \( -path "*/node_modules" -o \
+    -path "*/__pycache__" \) -prune \
+           -o -type f -exec md5sum {} + | \
+           sort | \
+           md5sum | \
+           awk '{print $1}')
+
+existing_checksum_file="$DIRECTORY_TO_MONITOR/checksum.txt"
+
+if [ -f "$existing_checksum_file" ]; then
+    existing_checksum=$(cat "$existing_checksum_file")
+    if [ "$existing_checksum" != "$new_checksum" ]; then
+        if command -v npm &> /dev/null; then
+            npm install --force
+            npm run dev & 
+            sleep 10
+
+        else
+            yarn install 
+            yarn dev run &
+            sleep 10
+        fi
+    fi
+else
+    echo "$new_checksum" > "$existing_checksum_file"
+fi
+
+
 cd ..
 
 # Prepare the compose file
@@ -59,7 +84,8 @@ if [ $radi_version != "humble" ]; then
 fi
 cp compose_cfg/$compose_file docker-compose.yaml
 
+
 # Proceed with docker-compose commands
-docker compose up; 
-docker compose down;
+docker-compose up
+docker-compose down
 rm docker-compose.yaml