Triggering a local poetry reinstall on dependency update

Right now, if a dependency changes, I need the code to fail for me to notice and run a poetry install. Is there a better way to do this?
Ideally, when I run poetry and the pyproject.toml doesn't match what's installed I'd like it to notice and either warn me or go ahead and update package versions.

Usually these are dealth with

• Having a continuous integration service like Github Actions

• Have a pull request workflow

• Have a bot that automatically opens new pull request for updated dependencies

See Dependabot by Github.

I assume you want to update your local virtualenv with poetry, whenever you checkout a branch with (possibly) modified poetry lock files.

This can be done with a git post-checkout hook, which runs whenever you check out a branch, or pulling in new commits.

To configure it to run a poetry install --sync, you need to create (or modify an existing) file .git/hooks/post-checkout (with +x):

#!/bin/sh
poetry install --sync

The downside is that it also runs when you checkout (revert) a single file. That can be prevented by checking the 3rd argument, and only running when a branch is checked out:

#!/bin/sh
flag=$3
if [[ "$flag" -eq 1 ]];then
  poetry install --sync
fi

For a mono-repo you could create an invocation for every relative path as follows:

#!/bin/sh
flag=$3
if [[ "$flag" -eq 1 ]];then
  echo "updating root project"
  poetry install --sync
  echo "updating subproject"
  poetry -C $(pwd)/sub-project-A install --sync
fi

Without the $(pwd) you (can) get the poetry error relative path can't be expressed as a file URI.