From a2aba3c8646ea0738ff454588773164e5917798f Mon Sep 17 00:00:00 2001
From: Caleigh Runge-Hottman <caleigh@redhat.com>
Date: Mon, 1 Feb 2021 10:28:32 -0500
Subject: [PATCH] pyrsistent install fails on py2.7

The python2.7 installation of pyresistent (a jsonschema dependency)
fails with the following error message:

"pyrsistent requires Python '>=3.5' but the running Python is 2.7.15"

Pyrsistent reportedly dropped python2.7 support [1]. Py2.7 installs
of jsonschema must pin the latest pyresistent version with python2.7
support (pyrsistent-0.16.1) to avoid an installation error.

This commit also introduces the constraints-legacy.txt file, which
contains dependencies specific to python2.7.

[1] https://github.com/tobgu/pyrsistent/issues/208
---
 constraints-legacy.txt | 3 +++
 tox.ini                | 5 +++++
 2 files changed, 8 insertions(+)
 create mode 100644 constraints-legacy.txt

diff --git a/constraints-legacy.txt b/constraints-legacy.txt
new file mode 100644
index 0000000..ee888bc
--- /dev/null
+++ b/constraints-legacy.txt
@@ -0,0 +1,3 @@
+# Oldest supported versions of major libraries can be added to this
+# file. They'll be tested with Python 2.7.
+pyrsistent==0.16.1
diff --git a/tox.ini b/tox.ini
index a08a8be..3008848 100644
--- a/tox.ini
+++ b/tox.ini
@@ -6,6 +6,11 @@ deps=-rtest-requirements.txt
 commands=pytest -v {posargs}
 whitelist_externals=sh
 
+[testenv:py27]
+deps=
+	-cconstraints-legacy.txt
+	-rtest-requirements.txt
+
 [testenv:static]
 deps=
 	-rtest-requirements.txt