fix: handle a few corner cases

sdk/python/flet/version.py

@@ -1,15 +1,23 @@
-import subprocess as sp
+"""Provide the current Flet version."""
+
 
-from pkg_resources import parse_version
+import os
+import subprocess as sp
+from pathlib import Path
 
+import flet
 from flet.utils import which
 
+
 # this value will be replaced by CI
 version = ""
 
 
 def update_version():
-    in_repo = sp.run(
+    """Return the current version or default."""
+    working = Path().absolute()
+    os.chdir(Path(flet.__file__).absolute().parent)
+    in_repo = which("git") and sp.run(
         ["git", "status"],
         capture_output=True,
         text=True,
@@ -18,15 +26,31 @@ def update_version():
     if in_repo:
         # NOTE: this may break if there is a tag name starting with
         #         "v" that isn't a version number
-        tags = sp.run(
-            ["git", "tag"],
+        class RepositoryError(OSError):
+            pass
+
+        git_p = sp.run(
+            ["git", "describe", "--abbrev=0"],
             capture_output=True,
             text=True,
-        ).stdout.splitlines()
-        versions = filter(lambda t: t.startswith("v"), tags)
-        return sorted(versions, key=parse_version)[-1][1:]
-    return "0.1.60"
+        )
+        err = git_p.stderr.strip()
+
+        if "cannot describe anything" in err:
+            msg = "You may be using a repo cloned from a fork. "
+            msg += "If so please clone the original Flet repo"
+            raise RepositoryError(msg)
+
+        if err:
+            msg = "Unknown error while fetching the version: {err}"
+            raise RepositoryError(msg)
+        version = git_p.stdout.strip()[1:]
+
+    else:
+        version = "0.1.60"
+    os.chdir(working)
+    return version
 
 
-if not globals().get("version", None):
+if not version:
     version = update_version()