majic-ansible-roles Changeset

Changeset - 3f7b6eade8d7

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Branko Majic (branko) - 4 years ago 2020-12-25 17:51:40
branko@majic.rs

MAR-177: Do not pin pip/setuptools to specific versions when setting up Python virtual environment:

- Provided more details for the pkg-resources workaround.
- Skip installing latest version of pip - it will get installed
automatically via the virtualenv command already.
- Do not pin the setuptools package when installing.
- Updated release notes.

2 files changed with 36 insertions and 10 deletions:

docs/releasenotes.rst

roles/wsgi_website/tasks/main.yml

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docs/releasenotes.rst

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@@ @@ -2,6 +2,20 @@ Release notes @@
 =============
 NEXT RELEASE
 ------------
 **Bug fixes:**
 * ``wsgi_website_`` role
   * When the virtual environment is created, the ``setuptools`` and
     ``pip`` packages will not get pinned to any specific version,
     allowing roles that are based on ``wsgi_website`` to easily
     install preferred versions, and avoid idempotence problems in the
     process.
 .0.0
 -----

roles/wsgi_website/tasks/main.yml

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@@ @@ -113,8 +113,24 @@ @@
     group: "{{ user }}"
     mode: 02750
 # setuptools is excluded on Stretch, because it would pull-in the
 # pkg-resources package that then messes with pip freeze etc.
 # @TODO: Get rid of this if possible in Debian Buster.
 # Do not install setuptools when creating the virtual environment -
 # otherwise it will also install Debian-specific pkg-resources
 # package. The pkg-resources package can be removed, but this breaks
 # the package downloading via pip.
+#
 # Install setuptools later on via separate pip invocation.
+#
 # The pkg-resources package is also annoying because it shows-up in
 # the output of the pip freeze command, and also interferes with the
 # virtual environment management using pip-tools.
+#
 # For more details, see:
+#
 # - https://github.com/pypa/pip/issues/4022
 # - https://bugs.launchpad.net/ubuntu/+source/python-pip/+bug/1635463
 # - https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=871790
 - name: Create Python virtual environment
   command: '/usr/bin/virtualenv --no-setuptools --python "{{ python_interpreter }}" --prompt "({{ fqdn }})" "{{ home }}/virtualenv"'
   args:
@@ @@ -127,20 +143,16 @@ @@
     #   created (thanks to 'creates' parameter).
     - skip_ansible_lint
 - name: Install latest pip and setuptools in virtual environment
 # @TODO: Park of the pkg-resources described above.
 - name: Install setuptools in virtual environment
   pip:
     name:
       - "pip>=18.0.0,<19.0.0"
       - "setuptools>=40.0.0,<41.0.0"
       - "setuptools"
     virtualenv: "{{ home }}/virtualenv"
   become: true
   become_user: "{{ admin }}"
 # Workaround for:
+#
 # - https://github.com/pypa/pip/issues/4022
 # - https://bugs.launchpad.net/ubuntu/+source/python-pip/+bug/1635463
 # - https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=871790
 # @TODO: Park of the pkg-resources described above.
 - name: Remove the pkg-resources package from virtual environment (see comments above for details)
   pip:
     name: pkg-resources

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