hub/script/tag-release

#!/bin/bash
set -e

version_file="version/version.go"

if git diff --exit-code >/dev/null -- "$version_file"; then
  echo "Update the version in $version_file and try again." >&2
  exit 1
fi

version="$(grep -w 'Version =' "$version_file" | cut -d'"' -f2)"

git commit -m "hub $version" -- "$version_file"

notes_file="$(mktemp)"
{ echo "hub $version"
  echo
  GITHUB_REF="refs/tags/v$version" script/changelog
} >"$notes_file"
trap "rm -f '$notes_file'" EXIT

git tag "v${version}" -F "$notes_file" --edit

git push origin HEAD "v${version}"