tree ccccb081aa22e5ce6614ad87cf473b446c70f311
parent 38dd043be6bf0ca128737422d45e07de74c62e6a
author Rob Mohr <mohrr@google.com> 1631071022 -0700
committer CQ Bot Account <pigweed-scoped@luci-project-accounts.iam.gserviceaccount.com> 1631081022 +0000

pw_env_setup: Pin Python package versions

Add a file to pass to the '--constraint' option of 'pip'. This allows
setup.cfg files to only set actual requirements on dependencies but
ensures the actual version retrieved for a given commit is always the
same.

Added a new command 'pw python-packages'. 'pw python-packages list'
writes the list of versions of installed packages to a file.
'pw python-packages diff' compares the list of installed packages to the
constraint file. If there are new packages or updates to package
versions 'pw python-packages diff' will fail.

Added an option to pw_env_setup, '--unpin-pip-packages'. If this is set
the constraint file defined in the top-level '.gn' file is ignored. This
should periodically be used to update versions of packages in the
constraint file.

Change-Id: I49337e029b0c5c82ac1414448d97d952d9df4dae
Bug: 459
Reviewed-on: https://pigweed-review.googlesource.com/c/pigweed/pigweed/+/58280
Pigweed-Auto-Submit: Rob Mohr <mohrr@google.com>
Commit-Queue: Auto-Submit <auto-submit@pigweed.google.com.iam.gserviceaccount.com>
Reviewed-by: Wyatt Hepler <hepler@google.com>