bin/post-checkout from 18F/openFEC

bin/post-checkout

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#/usr/bin/env bash

# git hook to run a command after `git checkout` if a specified file was changed
# Run `chmod +x post-checkout` to make it executable then put it into `.git/hooks/`.

PREV_HEAD=$1

changed_files="$(git diff-tree -r --name-only --no-commit-id $PREV_HEAD HEAD)"

check_run() {
    echo "$changed_files" | grep --quiet "$1" && eval "$2"
}

# Update dependencies
check_run requirements.txt "pip install -r requirements.txt --upgrade"