Git pre-commit hook to make sure you incremented your program's internal version variable.

pre-commit

#!/usr/bin/env bash
# Checks the latest release version of your GitHub project, and makes sure the local version variable has been incremented.
# This script will run before any commits happen, and interrupt if the local version has not been incremented since the last release.
# It's intended for use with projects who primarily increment versions around their release schedule.
#
# Requires that GitHub releases use tags that match the internal version. Supports oAuth info in the event of GitHub rate limiting.
# The parsing done in here is super hacky, but it's fast and it works cross-platform with minimal requirements.
# Works with any version tag format you use, and should be runnable on Windows/Linux.
#
# TO USE:
#     1) Save as "pre-commit" (no extension) in your project '.git/hooks/' directory.
#     2) Edit the config variables below.

# =====  CONFIG:  ===========
VERSION_FILE='./main.py'  # The file, relative to the project base, that contains the current internal version.
VERSION_VAR='__version__' # The name of the variable responsible for holding the version, as it appears within the file.

GH_CLIENT_ID=''  # If GitHub throttles you, register an oAuth client and use its ID & Password here. 
GH_CLIENT_SECRET=''  # (See above). https://github.com/settings/developers
#============================


remote=$(git config --get remote.origin.url)
REPO_OWNER=$(echo "$remote" | cut -d/ -f 4)
REPO_NAME=$(echo "$remote" | cut -d/ -f 5 | cut -d. -f 1)

gh_credentials=""

if [ -n "$GH_CLIENT_ID" ]; then
    gh_credentials="client_id=$GH_CLIENT_ID&client_secret=$GH_CLIENT_SECRET"
fi

remote_version=$(curl -s https://api.github.com/repos/$REPO_OWNER/$REPO_NAME/releases/latest?$gh_credentials| sed 's/ //g')
# Tags cannot contain spaces, so strip them out to make using regex on JSON more possible.

array=(${remote_version//,/ })
for i in "${!array[@]}"
do
	if [[ "${array[i]}" = *"tag_name"* ]]; then
	    found_version=$(echo "${array[i]}"| cut -d\" -f 4)
	fi
done

if [ -z "$found_version" ]; then
    echo "Found no release versions in GitHub's response"
    echo "You may be over the limit for API requests?"
	exit 2
fi

cat $VERSION_FILE | grep "$VERSION_VAR\s*="| grep $found_version|while read LINE
do
    echo "ERROR: The Internal Version has not been incremented since the last release tag!"
    echo "Found on line: \"$LINE\""
    echo "Remote version: \"$found_version\""
    exit 1
done