feat(analyzer): move compute_md5 to shared library

shared/libretime_shared/files.py

@@ -0,0 +1,17 @@
+import hashlib
+from pathlib import Path
+
+
+def compute_md5(filepath: Path) -> str:
+    """
+    Compute a file md5sum.
+    """
+    with filepath.open("rb") as file:
+        buffer = hashlib.md5()  # nosec
+        while True:
+            blob = file.read(8192)
+            if not blob:
+                break
+            buffer.update(blob)
+
+        return buffer.hexdigest()

shared/tests/files_test.py

@@ -0,0 +1,10 @@
+from pathlib import Path
+
+from libretime_shared.files import compute_md5
+
+
+def test_compute_md5(tmp_path: Path) -> None:
+    tmp_file = tmp_path / "somefile.txt"
+    tmp_file.write_text("some test")
+
+    assert compute_md5(tmp_file) == "f1b75ac7689ff88e1ecc40c84b115785"