FIX Previous commit with writing of shell script

src/lib/fs.py

@@ -1,5 +1,19 @@
+from pathlib import Path
+from os import chmod
+
+
 def sanitize_filename(filename: str) -> str:
     characters_not_allowed = ["<", ">", ":", '"', "/", "\\", "|", "?", "*", " ", "'"]
     for char in characters_not_allowed:
         filename = filename.replace(char, "")
     return filename
+
+
+def write_shell_script(script: str, filename: Path):
+    if filename.exists():
+        raise FileExistsError("encode.sh already exists")
+    with open(filename, "w") as f:
+        f.write("#!/bin/bash\n")
+        f.write(script)
+
+    chmod(filename, 0o755)