We no longer need to handle a static build directory

pip/locations.py

@@ -6,18 +6,12 @@
 import os.path
 import site
 import sys
-import tempfile
 
 from distutils import sysconfig
-from distutils.command.install import install, SCHEME_KEYS
+from distutils.command.install import install, SCHEME_KEYS  # noqa
 
-from pip.compat import get_path_uid, WINDOWS
+from pip.compat import WINDOWS
 from pip.utils import appdirs
-from pip import exceptions
-
-
-# Hack for flake8
-install
 
 
 # CA Bundle Locations
@@ -108,48 +102,9 @@ def __get_username():
     return pwd.getpwuid(os.geteuid()).pw_name
 
 
-def _get_build_prefix():
-    """ Returns a safe build_prefix """
-    path = os.path.join(
-        tempfile.gettempdir(),
-        'pip_build_%s' % __get_username().replace(' ', '_')
-    )
-    if WINDOWS:
-        """ on windows(tested on 7) temp dirs are isolated """
-        return path
-    try:
-        os.mkdir(path)
-        write_delete_marker_file(path)
-    except OSError:
-        file_uid = None
-        try:
-            # raises OSError for symlinks
-            # https://github.com/pypa/pip/pull/935#discussion_r5307003
-            file_uid = get_path_uid(path)
-        except OSError:
-            file_uid = None
-
-        if file_uid != os.geteuid():
-            msg = (
-                "The temporary folder for building (%s) is either not owned by"
-                " you, or is a symlink." % path
-            )
-            print(msg)
-            print(
-                "pip will not work until the temporary folder is either "
-                "deleted or is a real directory owned by your user account."
-            )
-            raise exceptions.InstallationError(msg)
-    return path
-
 if running_under_virtualenv():
-    build_prefix = os.path.join(sys.prefix, 'build')
     src_prefix = os.path.join(sys.prefix, 'src')
 else:
-    # Note: intentionally NOT using mkdtemp
-    # See https://github.com/pypa/pip/issues/906 for plan to move to mkdtemp
-    build_prefix = _get_build_prefix()
-
     # FIXME: keep src in cwd for now (it is not a temporary folder)
     try:
         src_prefix = os.path.join(os.getcwd(), 'src')
@@ -162,7 +117,6 @@ def _get_build_prefix():
 # under Mac OS X + virtualenv sys.prefix is not properly resolved
 # it is something like /path/to/python/bin/..
 # Note: using realpath due to tmp dirs on OSX being symlinks
-build_prefix = os.path.abspath(os.path.realpath(build_prefix))
 src_prefix = os.path.abspath(src_prefix)
 
 # FIXME doesn't account for venv linked to global site-packages

pip/req/req_set.py

@@ -13,9 +13,8 @@
 from pip.download import (url_to_path, unpack_url)
 from pip.exceptions import (InstallationError, BestVersionAlreadyInstalled,
                             DistributionNotFound, PreviousBuildDirError)
-from pip.locations import (PIP_DELETE_MARKER_FILENAME, build_prefix)
 from pip.req.req_install import InstallRequirement
-from pip.utils import (display_path, rmtree, dist_in_usersite, normalize_path)
+from pip.utils import display_path, dist_in_usersite, normalize_path
 from pip.utils.logging import indent_log
 from pip.vcs import vcs
 
@@ -558,18 +557,6 @@ def cleanup_files(self):
             for req in self.reqs_to_cleanup:
                 req.remove_temporary_source()
 
-            if self._pip_has_created_build_dir():
-                logger.debug('Removing temporary dir %s...', self.build_dir)
-                rmtree(self.build_dir)
-
-    def _pip_has_created_build_dir(self):
-        return (
-            self.build_dir == build_prefix and
-            os.path.exists(
-                os.path.join(self.build_dir, PIP_DELETE_MARKER_FILENAME)
-            )
-        )
-
     def _to_install(self):
         """Create the installation order.
 

tests/unit/test_locations.py

@@ -8,10 +8,7 @@
 import tempfile
 import getpass
 
-import pytest
-
 from mock import Mock
-import pip
 
 from pip.locations import distutils_scheme
 
@@ -77,86 +74,6 @@ def get_mock_getpwuid(self, uid):
         result.pw_name = self.username
         return result
 
-    def get_build_dir_location(self):
-        """ returns a string pointing to the
-            current build_prefix.
-        """
-        return os.path.join(self.tempdir, 'pip_build_%s' % self.username)
-
-    def test_dir_path(self):
-        """ test the path name for the build_prefix
-        """
-        from pip import locations
-        assert locations._get_build_prefix() == self.get_build_dir_location()
-
-    # skip on windows, build dir is not created
-    @pytest.mark.skipif("sys.platform == 'win32'")
-    @pytest.mark.skipif("not hasattr(os, 'O_NOFOLLOW')")
-    def test_dir_created(self):
-        """ test that the build_prefix directory is generated when
-            _get_build_prefix is called.
-        """
-        assert not os.path.exists(self.get_build_dir_location()), \
-            "the build_prefix directory should not exist yet!"
-        from pip import locations
-        locations._get_build_prefix()
-        assert os.path.exists(self.get_build_dir_location()), \
-            "the build_prefix directory should now exist!"
-
-    # skip on windows, build dir is not created
-    @pytest.mark.skipif("sys.platform == 'win32'")
-    def test_dir_created_without_NOFOLLOW(self, monkeypatch):
-        """ test that the build_prefix directory is generated when
-            os.O_NOFOLLOW doen't exist
-        """
-        if hasattr(os, 'O_NOFOLLOW'):
-            monkeypatch.delattr("os.O_NOFOLLOW")
-        assert not os.path.exists(self.get_build_dir_location()), \
-            "the build_prefix directory should not exist yet!"
-        from pip import locations
-        locations._get_build_prefix()
-        assert os.path.exists(self.get_build_dir_location()), \
-            "the build_prefix directory should now exist!"
-
-    # skip on windows; this exception logic only runs on linux
-    @pytest.mark.skipif("sys.platform == 'win32'")
-    @pytest.mark.skipif("not hasattr(os, 'O_NOFOLLOW')")
-    def test_error_raised_when_owned_by_another(self):
-        """ test calling _get_build_prefix when there is a temporary
-            directory owned by another user raises an InstallationError.
-        """
-        from pip import locations
-        os.geteuid = lambda: 1111
-        os.mkdir(self.get_build_dir_location())
-
-        with pytest.raises(pip.exceptions.InstallationError):
-            locations._get_build_prefix()
-
-    # skip on windows; this exception logic only runs on linux
-    @pytest.mark.skipif("sys.platform == 'win32'")
-    def test_error_raised_when_owned_by_another_without_NOFOLLOW(
-            self, monkeypatch):
-        """ test calling _get_build_prefix when there is a temporary
-            directory owned by another user raises an InstallationError.
-            (when os.O_NOFOLLOW doesn't exist
-        """
-        if hasattr(os, 'O_NOFOLLOW'):
-            monkeypatch.delattr("os.O_NOFOLLOW")
-        from pip import locations
-        os.geteuid = lambda: 1111
-        os.mkdir(self.get_build_dir_location())
-
-        with pytest.raises(pip.exceptions.InstallationError):
-            locations._get_build_prefix()
-
-    def test_no_error_raised_when_owned_by_you(self):
-        """ test calling _get_build_prefix when there is a temporary
-            directory owned by you raise no InstallationError.
-        """
-        from pip import locations
-        os.mkdir(self.get_build_dir_location())
-        locations._get_build_prefix()
-
 
 class TestDisutilsScheme: