Add, commit, tag and push in one go

avup.sh

#!/usr/bin/env bash

# Add, commit, tag and push
tag_and_push()
{
	# find version (x.x.x) in uncommitted changes
	local VERSION=''
	VERSION=$(git diff -U0 |
		grep -E "^\+.*([0-9]{1,2}\.[0-9]{1,2}\.[0-9]{1,2})")

	# cut out version if between double quotes
	VERSION=${VERSION#*\"}
	VERSION=${VERSION%\"*}

	# cut out version if between single quotes
	VERSION=${VERSION#*\'}
	VERSION=${VERSION%\'*}

	if [ -z "$VERSION" ]
	then
		echo "error: there's no version change" >&2
		return 1
	fi

	[ -r $(git rev-parse --show-cdup)/CHANGELOG.* ] && {
		git diff --name-only | grep 'CHANGELOG[\.md]*$' &>/dev/null || {
			read -r -n 1 -p "CHANGELOG not changed! Proceed? (y/n) "
			echo
			case "$REPLY" in
				y)
					;;
				*)
					return 2
					;;
			esac
		}
	}

	read -r -n 1 -p "Do you want to tag $VERSION? (y/n) "
	echo
	case "$REPLY" in
		''|y)
			git add --all &&
				git commit -m "Advanced version number to $VERSION" &&
				git tag -a "$VERSION" -m "Version $VERSION" &&
				git push origin master &&
				git push origin "$VERSION"
			;;
	esac
}

if [ "$0" == "$BASH_SOURCE" ]
then
	tag_and_push "$@"
fi