Add basic exception handling around the S3 request

Author: lesamouraipourpre

circuitpython_build_tools/build.py

@@ -83,14 +83,17 @@ def mpy_cross(mpy_cross_filename, circuitpython_tag, quiet=False):
 
     if s3_url is not None:
         print(f"Checking S3 for {s3_url}")
-        r = requests.get(s3_url)
-        if r.status_code == 200:
-            with open(mpy_cross_filename, "wb") as f:
-                f.write(r.content)
-                # Set the User Execute bit
-                os.chmod(mpy_cross_filename, os.stat(mpy_cross_filename)[0] | stat.S_IXUSR)
-                print("  FOUND")
-                return
+	try:
+            r = requests.get(s3_url)
+            if r.status_code == 200:
+                with open(mpy_cross_filename, "wb") as f:
+                    f.write(r.content)
+                    # Set the User Execute bit
+                    os.chmod(mpy_cross_filename, os.stat(mpy_cross_filename)[0] | stat.S_IXUSR)
+                    print("  FOUND")
+                    return
+        except Exception as e:
+            print(f"    exception fetching from S3: {e}")
         print("  NOT FOUND")
 
     if not quiet: