Reduce classes with use_user_site attribute

src/pip/_internal/commands/install.py

@@ -246,7 +246,6 @@ class InstallCommand(RequirementCommand):
                     target_dir=target_temp_dir.path,
                     pycompile=options.compile,
                     require_hashes=options.require_hashes,
-                    use_user_site=options.use_user_site,
                 )
 
                 self.populate_requirement_set(
@@ -297,6 +296,7 @@ class InstallCommand(RequirementCommand):
                         root=options.root_path,
                         prefix=options.prefix_path,
                         warn_script_location=options.warn_script_location,
+                        use_user_site=options.use_user_site,
                     )
 
                     possible_lib_locations = get_lib_location_guesses(

src/pip/_internal/operations/prepare.py

@@ -266,7 +266,7 @@ class RequirementPreparer(object):
                     req.archive(self.download_dir)
         return abstract_dist
 
-    def prepare_editable_requirement(self, req, require_hashes):
+    def prepare_editable_requirement(self, req, require_hashes, use_user_site):
         """Prepare an editable requirement
         """
         assert req.editable, "cannot prepare a non-editable req as editable"
@@ -288,7 +288,7 @@ class RequirementPreparer(object):
 
             if self._download_should_save:
                 req.archive(self.download_dir)
-            req.check_if_exists()
+            req.check_if_exists(use_user_site)
 
         return abstract_dist
 

src/pip/_internal/req/req_install.py

@@ -120,7 +120,6 @@ class InstallRequirement(object):
         self.install_succeeded = None
         # UninstallPathSet of uninstalled distribution (for possible rollback)
         self.uninstalled_pathset = None
-        self.use_user_site = False
         self.target_dir = None
         self.options = options if options else {}
         self.pycompile = pycompile
@@ -639,7 +638,8 @@ class InstallRequirement(object):
                 'Unexpected version control type (in %s): %s'
                 % (self.link, vc_type))
 
-    def uninstall(self, auto_confirm=False, verbose=False):
+    def uninstall(self, auto_confirm=False, verbose=False,
+                  use_user_site=False):
         """
         Uninstall the distribution currently satisfying this requirement.
 
@@ -652,7 +652,7 @@ class InstallRequirement(object):
         linked to global site-packages.
 
         """
-        if not self.check_if_exists():
+        if not self.check_if_exists(use_user_site):
             logger.warning("Skipping %s as it is not installed.", self.name)
             return
         dist = self.satisfied_by or self.conflicts_with
@@ -730,7 +730,7 @@ class InstallRequirement(object):
             return True
 
     def install(self, install_options, global_options=None, root=None,
-                prefix=None, warn_script_location=True):
+                prefix=None, warn_script_location=True, use_user_site=False):
         global_options = global_options if global_options is not None else []
         if self.editable:
             self.install_editable(
@@ -744,6 +744,7 @@ class InstallRequirement(object):
             self.move_wheel_files(
                 self.source_dir, root=root, prefix=prefix,
                 warn_script_location=warn_script_location,
+                use_user_site=use_user_site,
             )
             self.install_succeeded = True
             return
@@ -894,7 +895,7 @@ class InstallRequirement(object):
 
         self.install_succeeded = True
 
-    def check_if_exists(self):
+    def check_if_exists(self, use_user_site):
         """Find an installed distribution that satisfies or conflicts
         with this requirement, and set self.satisfied_by or
         self.conflicts_with appropriately.
@@ -921,7 +922,7 @@ class InstallRequirement(object):
             existing_dist = pkg_resources.get_distribution(
                 self.req.name
             )
-            if self.use_user_site:
+            if use_user_site:
                 if dist_in_usersite(existing_dist):
                     self.conflicts_with = existing_dist
                 elif (running_under_virtualenv() and
@@ -940,10 +941,10 @@ class InstallRequirement(object):
         return self.link and self.link.is_wheel
 
     def move_wheel_files(self, wheeldir, root=None, prefix=None,
-                         warn_script_location=True):
+                         warn_script_location=True, use_user_site=False):
         move_wheel_files(
             self.name, self.req, wheeldir,
-            user=self.use_user_site,
+            user=use_user_site,
             home=self.target_dir,
             root=root,
             prefix=prefix,

src/pip/_internal/req/req_set.py

@@ -13,7 +13,7 @@ logger = logging.getLogger(__name__)
 class RequirementSet(object):
 
     def __init__(self,
-                 require_hashes=False, target_dir=None, use_user_site=False,
+                 require_hashes=False, target_dir=None,
                  pycompile=True):
         """Create a RequirementSet.
 
@@ -29,7 +29,6 @@ class RequirementSet(object):
         self.unnamed_requirements = []
         self.successfully_downloaded = []
         self.reqs_to_cleanup = []
-        self.use_user_site = use_user_site
         self.target_dir = target_dir  # set from --target option
         self.pycompile = pycompile
         # Maps from install_req -> dependencies_of_install_req
@@ -81,7 +80,6 @@ class RequirementSet(object):
                     wheel.filename
                 )
 
-        install_req.use_user_site = self.use_user_site
         install_req.target_dir = self.target_dir
         install_req.pycompile = self.pycompile
         install_req.is_direct = (parent_req_name is None)

src/pip/_internal/resolve.py

@@ -146,7 +146,7 @@ class Resolver(object):
         if self.ignore_installed:
             return None
 
-        req_to_install.check_if_exists()
+        req_to_install.check_if_exists(self.use_user_site)
         if not req_to_install.satisfied_by:
             return None
 
@@ -187,7 +187,7 @@ class Resolver(object):
 
         if req.editable:
             return self.preparer.prepare_editable_requirement(
-                req, self.require_hashes
+                req, self.require_hashes, self.use_user_site,
             )
 
         # satisfied_by is only evaluated by calling _check_skip_installed,
@@ -215,7 +215,7 @@ class Resolver(object):
         # pkgs repeat check_if_exists to uninstall-on-upgrade
         # (#14)
         if not self.ignore_installed:
-            req.check_if_exists()
+            req.check_if_exists(self.use_user_site)
 
         if req.satisfied_by:
             should_modify = (