The "tagIt" bash script, used to generate tags for NVDA add-on repos

tagIt.sh

#!/bin/bash
# tagIt v2.0
# This script generates an appropriate git tag for an NVDA add-on's release.
# Author: Luke Davis, @XLTechie on GitHub
# By using this script, you agree that I have no responsibility for what you do with it, how you modify it, and
# that I have provided no express or implied warranty.
# I disclaim all responsibility for the outcome of your use, and hereby release it into the public domain.
#
# Usage: tagIt "the tag message"
# When started from an add-on's git repository, it will determine the add-on
# version number and channel from the buildVars.py file at the root of the repo.
# It will then create a tag of the form:
# v{version_number}{-channel}
# E.g., for a stable (None) channel add-on, with version 24.1.3, the tag would be:
# v24.1.3
# If that same add-on was in the dev channel:
# v24.1.3-dev
# Or in the beta channel:
# v24.1.3-beta
# Of course, you are responsible for making certain that the repo is on the correct commit and branch before running this.
# You are also responsible for making sure that git actually pushes the tag,
# so that any automation can perform an appropriate build based on the tagged version.
# Use either:
# git push --tags
# or:
# git push --follow-tags
# or by setting the appropriate option in git config:
# git config push.followTags true

set -e

dir=$(git rev-parse --show-toplevel ) ||{
echo 1>&2 "Not a git repository."
 exit 1
}

python_bin=$(which python) || {
echo 1>&2 "Can not find python on path $PATH"
exit 2
}

[ -r "$dir"/buildVars.py ] || {
echo 1>&2 "Can not read \"$dir/buildVars.py\""
exit 3
}

[ -z "$1" ] && {
echo 1>&2 -e "Usage:\n$0 \"TAG MESSAGE\"\nWhere TAG MESSAGE is the message given to git for this tag, which is what makes it a full tag object."
echo 2>&1 "You almost certainly want to quote it, to escape it from the shell."
exit 4
}

eval $({
cat "$dir"/buildVars.py
cat <<EOD
tag = f'v{addon_info["addon_version"]}'
if addon_info["addon_updateChannel"] is not None:
	tag += f'-{addon_info["addon_updateChannel"]}'
print(f"echo Tagging {tag};")
print(f"git tag {tag} -m '$1'")
EOD
} | $python_bin)