ci(gevent): pin greenlet for legacy gevent versions (backport #4437) (#…

…4456)

* ci(gevent): pin greenlet for legacy gevent versions (#4437)

Earlier versions of gevent (v1.1, v1.2, v1.3, v1.4, v20.9) only specify a minimum greenlet version. greenlet v2.0 updated its ABI to support py3.11 and is only compatible with gevent>=22.10.2..

This change updates gevent and opentracer tests to install greenlet<2 if gevent<=20.9 is used.

Co-authored-by: Munir Abdinur <munir.abdinur@datadoghq.com>

tox.ini

@@ -31,10 +31,10 @@ envlist =
     dogpile_contrib-py{36,37,38,39,310}-dogpilecache{06,07,08,09,10,}
     futures_contrib-py27-futures{30,31,32,}
     futures_contrib-py{35,36,37,38,39,310}
-    gevent_contrib-py27-gevent{11,12,13}-sslmodules
-    gevent_contrib-py{35,36}-gevent{11,12,13}-sslmodules3-sslmodules
-    gevent_contrib-py{37,38}-gevent{13,14}-sslmodules3-sslmodules
-    gevent_contrib-py{39}-gevent{209,2012,211}-sslmodules3-sslmodules
+    gevent_contrib-py27-gevent{11,12,13}-greenlet1-sslmodules
+    gevent_contrib-py{35,36}-gevent{11,12,13}-greenlet1-sslmodules3-sslmodules
+    gevent_contrib-py{37,38}-gevent{13,14}-greenlet1-sslmodules3-sslmodules
+    gevent_contrib-py{39}-gevent{209,2012,211}-greenlet1-sslmodules3-sslmodules
     gevent_contrib-py{310}-gevent{218}-sslmodules3-sslmodules
     httplib_contrib-py{27,35,36,37,38,39,310}
     kombu_contrib-py{27,35,36}-kombu{40,41,42,43,44,45,46,}
@@ -64,20 +64,20 @@ envlist =
     py{27,35,36,37,38,39,310}-opentracer
     py{35,36,37,38,39,310}-opentracer_asyncio
     py{35,36,37,38,39,310}-opentracer_tornado-tornado{44,45,50,60,}
-    py{27,35,36}-opentracer_gevent-gevent{11,12}
-    py{37,38}-opentracer_gevent-gevent{13,14}
-    py{39,310}-opentracer_gevent-gevent{209,2012,211}
+    py{27,35,36}-opentracer_gevent-gevent{11,12}-greenlet1
+    py{37,38}-opentracer_gevent-gevent{13,14}-greenlet1
+    py{39,310}-opentracer_gevent-gevent{209,2012,211}-greenlet1
 
 isolated_build = true
 
 requires = virtualenv<=20.2.1
 
-[testenv:gevent_contrib-py{37,38}-gevent{13,14}-sslmodules3-sslmodules]
+[testenv:gevent_contrib-py{37,38}-gevent{13,14}-greenlet1-sslmodules3-sslmodules]
 # Wheels for gevent segfault pretty easily
 install_command=python -m pip install --no-binary=gevent {opts} {packages}
 usedevelop = true
 
-[testenv:py{37,38}-opentracer_gevent-gevent{13,14}]
+[testenv:py{37,38}-opentracer_gevent-gevent{13,14}-greenlet1]
 # Wheels for gevent segfault pretty easily
 install_command=python -m pip install --no-binary=gevent {opts} {packages}
 usedevelop = true
@@ -119,8 +119,12 @@ deps =
     py310-profile-minreqs: protobuf==3.8.0
     profile-minreqs: tenacity==5.0.1
     profile-!minreqs-gevent: gevent
+    # gevent==1.1 requires greenlet<2
     py27-profile-minreqs-gevent: gevent==1.1.0
+    py27-profile-minreqs-gevent: greenlet<2
+    # gevent==1.4 requires greenlet<2
     py{35,36,37,38}-profile-minreqs-gevent: gevent==1.4.0
+    py{35,36,37,38}-profile-minreqs-gevent: greenlet<2
     py39-profile-minreqs-gevent: gevent==20.6.1; sys_platform != 'win32'
     py39-profile-minreqs-gevent: gevent==21.1.2; sys_platform == 'win32'
     py39-profile-minreqs-gevent: greenlet==0.4.16; sys_platform != 'win32'
@@ -161,6 +165,9 @@ deps =
     gevent2012: gevent>=20.12,<20.13
     gevent211: gevent>=21.1,<21.2
     gevent218: gevent>=21.8,<21.9
+    # Note -  gevent<20.12 does not set a maximum supported version.
+    # To test with gevent<20.12 we need to manually install greenlet<2.
+    greenlet1: greenlet>=1,<2
     # kombu using deprecated shims removed in importlib-metadata 5.0
     kombu{40,41,42,43,44,45,46,}: importlib_metadata<5.0; python_version<'3.8'
     kombu: kombu