[build]: Fix sonic-cfggen contextlib err (sonic-net#7996)

A recent version of contextlib2 (https://pypi.org/project/contextlib2/21.6.0/#history) has broken Python2 compatibility, so the version picked up by netaddr when using Python2 must be specified, or else builds fail Co-authored-by: Tom Zhu <[email protected]>
stephenxs · Jun 29, 2021 · 1d3e7ab · 1d3e7ab
1 parent c301877
commit 1d3e7ab
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diff --git a/dockers/docker-sonic-mgmt/Dockerfile.j2 b/dockers/docker-sonic-mgmt/Dockerfile.j2
@@ -35,6 +35,7 @@ RUN apt-get update && apt-get install -y build-essential \
 
 RUN pip install cffi==1.10.0 \
                 "cryptography>=2.5" \
+                contextlib2==0.6.0.post1 \
                 "future>=0.16.0" \
                 gitpython \
                 ipaddr \

diff --git a/src/sonic-config-engine/setup.py b/src/sonic-config-engine/setup.py
@@ -31,7 +31,8 @@
         'Jinja2<3.0.0',
         'pyangbind==0.6.0',
         'zipp==1.2.0',  # importlib-resources needs zipp and seems to have a bug where it will try to install too new of a version for Python 2
-        'importlib-resources==3.3.1'  # importlib-resources v4.0.0 was released 2020-12-23 and drops support for Python 2
+        'importlib-resources==3.3.1',  # importlib-resources v4.0.0 was released 2020-12-23 and drops support for Python 2
+        'contextlib2==0.6.0.post1'
     ]