Some refactorings

micropip/_commands/install.py

@@ -5,9 +5,9 @@
 from packaging.markers import default_environment
 
 from .._compat import loadPackage, to_js
+from .._uninstall import _uninstall
 from ..constants import FAQ_URLS
 from ..transaction import Transaction
-from .uninstall import uninstall
 
 
 async def install(
@@ -128,7 +128,14 @@ async def install(
         [pkg.name for pkg in transaction.pyodide_packages]
     )
 
-    uninstall(packages_all, ignore_missing=True)
+    distributions = []
+    for pkg_name in packages_all:
+        try:
+            distributions.append(importlib.metadata.distribution(pkg_name))
+        except importlib.metadata.PackageNotFoundError:
+            pass
+
+    _uninstall(distributions)
 
     wheel_promises = []
     # Install built-in packages

micropip/_commands/uninstall.py

@@ -4,11 +4,10 @@
 from collections.abc import Iterable
 from importlib.metadata import Distribution
 
-from .._compat import loadedPackages
-from .._utils import get_files_in_distribution, get_root
+from .._uninstall import _uninstall
 
 
-def uninstall(packages: str | Iterable[str], *, ignore_missing: bool = False) -> None:
+def uninstall(packages: str | Iterable[str]) -> None:
     """Uninstall the given packages.
 
     This function only supports uninstalling packages that are installed
@@ -23,9 +22,6 @@ def uninstall(packages: str | Iterable[str], *, ignore_missing: bool = False) ->
     ----------
     packages
         Packages to uninstall.
-
-    _ignore_missing
-        If ``True``, suppress warnings when a package is not installed.
     """
 
     if isinstance(packages, str):
@@ -37,61 +33,11 @@ def uninstall(packages: str | Iterable[str], *, ignore_missing: bool = False) ->
             dist = importlib.metadata.distribution(package)
             distributions.append(dist)
         except importlib.metadata.PackageNotFoundError:
-            if not ignore_missing:  # TODO: Can we utilize log level here?
-                warnings.warn(
-                    f"WARNING: Skipping '{package}' as it is not installed.",
-                    stacklevel=1,
-                )
-
-    for dist in distributions:
-        # Note: this value needs to be retrieved before removing files, as
-        #       dist.name uses metadata file to get the name
-        name = dist.name
-
-        root = get_root(dist)
-        files = get_files_in_distribution(dist)
-        directories = set()
-
-        for file in files:
-            if not file.is_file():
-                if not file.is_relative_to(root):
-                    # This file is not in the site-packages directory. Probably one of:
-                    # - data_files
-                    # - scripts
-                    # - entry_points
-                    # Since we don't support these, we can ignore them (except for data_files (TODO))
-                    continue
-
-                warnings.warn(
-                    f"WARNING: A file '{file}' listed in the metadata of '{dist.name}' does not exist.",
-                    stacklevel=1,
-                )
-
-                continue
-
-            file.unlink()
-
-            if file.parent != root:
-                directories.add(file.parent)
-
-        # Remove directories in reverse hierarchical order
-        for directory in sorted(directories, key=lambda x: len(x.parts), reverse=True):
-            try:
-                directory.rmdir()
-            except OSError:
-                warnings.warn(
-                    f"WARNING: A directory '{directory}' is not empty after uninstallation of '{name}'. "
-                    "This might cause problems when installing a new version of the package. ",
-                    stacklevel=1,
-                )
-
-        if hasattr(loadedPackages, name):
-            delattr(loadedPackages, name)
-        else:
-            # This should not happen, but just in case
             warnings.warn(
-                f"WARNING: a package '{name}' was not found in loadedPackages.",
+                f"WARNING: Skipping '{package}' as it is not installed.",
                 stacklevel=1,
             )
 
+    _uninstall(distributions)
+
     importlib.invalidate_caches()

micropip/_uninstall.py

@@ -0,0 +1,78 @@
+import importlib
+import importlib.metadata
+import warnings
+from collections.abc import Iterable
+from importlib.metadata import Distribution
+
+from .._compat import loadedPackages
+from .._utils import get_files_in_distribution, get_root
+
+
+def _uninstall(distributions: Iterable[Distribution]) -> None:
+    """Uninstall the given package distributions.
+
+    This function does not do any checks, so make sure that the distributions
+    are installed and that they are installed using a wheel file, i.e. packages
+    that have distribution metadata.
+
+    This function also does not invalidate the import cache, so make sure to
+    call `importlib.invalidate_caches()` after calling this function.
+
+    Parameters
+    ----------
+    distributions
+        Package distributions to uninstall.
+    """
+
+    for dist in distributions:
+        # Note: this value needs to be retrieved before removing files, as
+        #       dist.name uses metadata file to get the name
+        name = dist.name
+
+        root = get_root(dist)
+        files = get_files_in_distribution(dist)
+        directories = set()
+
+        for file in files:
+            if not file.is_file():
+                if not file.is_relative_to(root):
+                    # This file is not in the site-packages directory. Probably one of:
+                    # - data_files
+                    # - scripts
+                    # - entry_points
+                    # Since we don't support these, we can ignore them (except for data_files (TODO))
+                    continue
+
+                warnings.warn(
+                    f"WARNING: A file '{file}' listed in the metadata of '{dist.name}' does not exist.",
+                    stacklevel=1,
+                )
+
+                continue
+
+            file.unlink()
+
+            if file.parent != root:
+                directories.add(file.parent)
+
+        # Remove directories in reverse hierarchical order
+        for directory in sorted(directories, key=lambda x: len(x.parts), reverse=True):
+            try:
+                directory.rmdir()
+            except OSError:
+                warnings.warn(
+                    f"WARNING: A directory '{directory}' is not empty after uninstallation of '{name}'. "
+                    "This might cause problems when installing a new version of the package. ",
+                    stacklevel=1,
+                )
+
+        if hasattr(loadedPackages, name):
+            delattr(loadedPackages, name)
+        else:
+            # This should not happen, but just in case
+            warnings.warn(
+                f"WARNING: a package '{name}' was not found in loadedPackages.",
+                stacklevel=1,
+            )
+
+    importlib.invalidate_caches()