Update news and vendoring scripts

Signed-off-by: Dan Ryan <dan@danryan.co>

news/2639.vendor

@@ -1 +1,14 @@
-Vendored new libraries ``vistir`` and ``pip-shims``.
+- Vendored new libraries ``vistir`` and ``pip-shims``.
+
+- Update vendored libraries:
+  - ``scandir`` to ``1.9.0``
+  - ``click-completion`` to ``0.4.1``
+  - ``semver`` to ``2.8.1``
+  - ``shellingham`` to ``1.2.4``
+  - ``pytoml`` to ``0.1.18``
+  - ``certifi`` to ``2018.8.13``
+  - ``ptyprocess`` to ``0.6.0``
+  - ``requirementslib`` to ``1.1.2``
+  - ``pythonfinder`` to ``1.0.2``
+  - ``pipdeptree`` to ``0.13.0``
+  - ``python-dotenv`` to ``0.9.1``

pipenv/patched/piptools/utils.py

@@ -341,7 +341,7 @@ def fs_str(string):
 _fs_encoding = sys.getfilesystemencoding() or sys.getdefaultencoding()
 
 
-# Borrowed from Pew.
+# Borrowed from pew to avoid importing pew which imports psutil
 # See https://github.com/berdario/pew/blob/master/pew/_utils.py#L82
 @contextmanager
 def temp_environ():

tasks/vendoring/__init__.py

@@ -407,17 +407,24 @@ def rewrite_all_imports(ctx):
 
 
 @invoke.task
-def download_licenses(ctx, vendor_dir=None, requirements_file='vendor.txt', package=None):
+def download_licenses(ctx, vendor_dir=None, requirements_file='vendor.txt', package=None, only=False):
     log('Downloading licenses')
     if not vendor_dir:
         vendor_dir = _get_vendor_dir(ctx)
     requirements_file = vendor_dir / requirements_file
     requirement = "-r {0}".format(requirements_file.as_posix())
     if package:
-        requirement = _ensure_package_in_requirements(ctx, requirements_file, package)
+        if not only:
+            # for packages we want to add to the requirements file
+            requirement = _ensure_package_in_requirements(ctx, requirements_file, package)
+        else:
+            # for packages we want to get the license for by themselves
+            requirement = package
     tmp_dir = vendor_dir / '__tmp__'
+    # TODO: Fix this whenever it gets sorted out (see https://github.com/pypa/pip/issues/5739)
+    ctx.run('pip install flit')
     ctx.run(
-        'pip download --no-binary :all: --no-deps -d {0} {1}'.format(
+        'pip download --no-binary :all: --no-build-isolation --no-deps -d {0} {1}'.format(
             tmp_dir.as_posix(),
             requirement,
         )