Return file size along with count on cache purge or removal (#13108)

news/12176.feature.rst

@@ -0,0 +1 @@
+Pip now returns the size, along with the number, of files cleared on ``pip cache purge`` and ``pip cache remove``

src/pip/_internal/commands/cache.py

@@ -8,6 +8,7 @@
 from pip._internal.exceptions import CommandError, PipError
 from pip._internal.utils import filesystem
 from pip._internal.utils.logging import getLogger
+from pip._internal.utils.misc import format_size
 
 logger = getLogger(__name__)
 
@@ -180,10 +181,12 @@ def remove_cache_items(self, options: Values, args: List[Any]) -> None:
         if not files:
             logger.warning(no_matching_msg)
 
+        bytes_removed = 0
         for filename in files:
+            bytes_removed += os.stat(filename).st_size
             os.unlink(filename)
             logger.verbose("Removed %s", filename)
-        logger.info("Files removed: %s", len(files))
+        logger.info("Files removed: %s (%s)", len(files), format_size(bytes_removed))
 
     def purge_cache(self, options: Values, args: List[Any]) -> None:
         if args:

tests/functional/test_cache.py

@@ -256,7 +256,7 @@ def test_cache_purge_with_empty_cache(script: PipTestEnvironment) -> None:
     and exit without an error code."""
     result = script.pip("cache", "purge", allow_stderr_warning=True)
     assert result.stderr == "WARNING: No matching packages\n"
-    assert result.stdout == "Files removed: 0\n"
+    assert result.stdout == "Files removed: 0 (0 bytes)\n"
 
 
 @pytest.mark.usefixtures("populate_wheel_cache")
@@ -265,7 +265,7 @@ def test_cache_remove_with_bad_pattern(script: PipTestEnvironment) -> None:
     and exit without an error code."""
     result = script.pip("cache", "remove", "aaa", allow_stderr_warning=True)
     assert result.stderr == 'WARNING: No matching packages for pattern "aaa"\n'
-    assert result.stdout == "Files removed: 0\n"
+    assert result.stdout == "Files removed: 0 (0 bytes)\n"
 
 
 def test_cache_list_too_many_args(script: PipTestEnvironment) -> None: