add progress bar to _download_file if in Progress.Indictor context

src/poetry/puzzle/provider.py

@@ -49,6 +49,18 @@
 
 
 class Indicator(ProgressIndicator):
+    CONTEXT: str | None = None
+
+    @staticmethod
+    def set_context(context: str | None) -> None:
+        Indicator.CONTEXT = context
+
+    def _formatter_context(self) -> str:
+        if Indicator.CONTEXT is None:
+            return " "
+        else:
+            return f": {Indicator.CONTEXT} "
+
     def _formatter_elapsed(self) -> str:
         elapsed = time.time() - self._start_time
 
@@ -781,7 +793,9 @@ def progress(self) -> Iterator[None]:
             self._io.write_line("Resolving dependencies...")
             yield
         else:
-            indicator = Indicator(self._io, "{message} <debug>({elapsed:2s})</debug>")
+            indicator = Indicator(
+                self._io, "{message}{context}<debug>({elapsed:2s})</debug>"
+            )
 
             with indicator.auto(
                 "<info>Resolving dependencies...</info>",

src/poetry/utils/helpers.py

@@ -94,16 +94,41 @@ def download_file(
 ) -> None:
     import requests
 
+    from poetry.puzzle.provider import Indicator
+
     get = requests.get if not session else session.get
 
     response = get(url, stream=True)
     response.raise_for_status()
 
+    set_indicator = False
+    if "Content-Length" in response.headers:
+        try:
+            total_size = int(response.headers["Content-Length"])
+        except ValueError:
+            total_size = 0
+
+        fetched_size = 0
+        last_percent = 0
+
+        Indicator.set_context(f"Downloading {url}")
+        # if less than 1MB, we simply show that we're downloading but skip the updating
+        set_indicator = total_size > 1024 * 1024
+
     with open(dest, "wb") as f:
         for chunk in response.iter_content(chunk_size=chunk_size):
             if chunk:
                 f.write(chunk)
 
+                if set_indicator:
+                    fetched_size += len(chunk)
+                    percent = (fetched_size * 100) // total_size
+                    if percent > last_percent:
+                        last_percent = percent
+                        Indicator.set_context(f"Downloading {url} {percent:3}%")
+
+    Indicator.set_context(None)
+
 
 def get_package_version_display_string(
     package: Package, root: Path | None = None