Make install directory if it doesn't exist yet

Problem: In Fedora, `sudo python3 setup.py install` installs to
/usr/local/lib/pythonX.Y/site-packages. However that directory is
not always there as it is not installed together with the python3
package (Fedora packages should not install stuff to /usr/local).

When the directory does not exist an installation attempt fails with:

  [Errno 2] No such file or directory:
  '/usr/local/lib/python3.7/site-packages/test-easy-install-11875.write-test'

Solution: Make the directory if it doesn't exists yet. If user has
no permissions, the above error is preserved, yet with root (sudo)
it works now.

1 files changed, 6 insertions, 0 deletions

diff --git a/setuptools/command/easy_install.py b/setuptools/command/easy_install.py
index 05508ceb..5b65b95d 100755
--- a/setuptools/command/easy_install.py
+++ b/setuptools/command/easy_install.py
@@ -450,6 +450,12 @@ class easy_install(Command):
         instdir = normalize_path(self.install_dir)
         pth_file = os.path.join(instdir, 'easy-install.pth')
 
+        if not os.path.exists(instdir):
+            try:
+                os.makedirs(instdir)
+            except (OSError, IOError):
+                self.cant_write_to_target()
+
         # Is it a configured, PYTHONPATH, implicit, or explicit site dir?
         is_site_dir = instdir in self.all_site_dirs