improve abs_path of file dependency

utils/utils.py

@@ -1,6 +1,8 @@
 import hashlib
 import time
 from pathlib import PurePosixPath, Path, PureWindowsPath
+import base64
+import re
 
 def windows_to_linux_path(windows_path):
     return PureWindowsPath(windows_path).as_posix()
@@ -17,4 +19,17 @@ def compute_sha256(file_path, chunk_size=1024 ** 2):
             sha256.update(chunk)
     print("finish compute sha256 for", file_path, f"time: {time.time() - start}")
     # Return the hexadecimal digest of the hash
-    return sha256.hexdigest()
+    return sha256.hexdigest()
+
+
+def get_alphanumeric_hash(input_string: str) -> str:
+    # Generate a SHA-256 hash of the input string
+    sha256_hash = hashlib.sha256(input_string.encode()).digest()
+    
+    # Encode the hash in base64 to get a string with [A-Za-z0-9+/=]
+    base64_hash = base64.b64encode(sha256_hash).decode('ascii')
+    
+    # Remove any non-alphanumeric characters (+, /, =)
+    alphanumeric_hash = re.sub(r'[^a-zA-Z0-9]', '', base64_hash)
+    
+    return alphanumeric_hash