Allow setting $TMPDIR to $PWD/... during pip wheel

Needed for https://bugzilla.redhat.com/show_bug.cgi?id=1806625

python-pip.spec

@@ -23,7 +23,7 @@ Name:           python-%{srcname}
 # When updating, update the bundled libraries versions bellow!
 # You can use vendor_meta.sh in the dist git repo
 Version:        19.0.3
-Release:        6%{?dist}
+Release:        7%{?dist}
 Summary:        A tool for installing and managing Python packages
 
 # We bundle a lot of libraries with pip, which itself is under MIT license.
@@ -119,6 +119,12 @@ Patch7:         urllib3-1.25.3.patch
 # https://github.com/pypa/pip/commit/8e8d28dd8ecc9226ea4e0f75d54151df90f4d78e
 Patch8:         requests-2.22.0.patch
 
+# Allow setting $TMPDIR to $PWD/... during pip wheel
+# This is needed to have proper debugsource packages with pyproject-rpm-macros
+# https://bugzilla.redhat.com/show_bug.cgi?id=1806625
+# Backported from https://github.com/pypa/pip/pull/7873
+Patch9:         7873.patch
+
 # Downstream only patch
 # Users might have local installations of pip from using
 # `pip install --user --upgrade pip` on older/newer versions.
@@ -314,6 +320,7 @@ popd
 %patch6 -p1
 %patch7 -p1
 %patch8 -p1
+%patch9 -p1
 
 # this goes together with patch4
 rm src/pip/_vendor/certifi/*.pem
@@ -532,6 +539,9 @@ ln -sf %{buildroot}%{_bindir}/pip3 _bin/pip
 %endif
 
 %changelog
+* Fri Apr 10 2020 Miro Hrončok <mhroncok@redhat.com> - 19.0.3-7
+- Allow setting $TMPDIR to $PWD/... during pip wheel (#1806625)
+
 * Thu Jan 02 2020 Miro Hrončok <mhroncok@redhat.com> - 19.0.3-6
 - Upgrade urllib3 to 1.25.3, requests to 2.22.0
 - Fix urllib3 CVE-2019-11324 (#1774595)