Add `release` script

#!/bin/bash

# Usage: script/brew-publish <name> <version> [<gh-project>]

#

# Updates the `<name>.rb` Homebrew formula to `<version>` and sends a pull

# request with the change.

set -e

brew_name="${1?}"

version="${2?}"

if ! type -p hub >/dev/null; then

  "ERROR: You have to install hub to proceed." >&2

  exit 1

fi

if [ -n "$3" ]; then

  gh_project="github.com/${3}"

else

  gh_project="$(git remote -v | grep '^origin' | grep -oE 'github.com[:/][^/]+/[^/ ]+')"

  gh_project="${gh_project%.git}"

fi

url="https://${gh_project/:/\/}/archive/${version}.tar.gz"

checksum="$(curl -fsSL "$url" | shasum | awk '{print $1}')"

if [ -z "$checksum" ]; then

  echo "ERROR: calculating the checksum failed for $url" >&2

  exit 1

fi

pushd "$(brew --prefix)"

git fetch -q origin master

formula="Library/Formula/${brew_name}.rb"

sed -i.bak -E "

  s!^(  url ).+!\\1\"${url}\"!

  s!^(  sha1 ).+!\\1\"${checksum}\"!

" "$formula"

rm -f "${formula}.bak"

branch="${brew_name}-${version}"

git checkout -q -B "$branch" origin/master

git commit -m "${brew_name} ${version#v}" -- "$formula"

# hackish way of getting the git remote name for user's fork

fork_remote="$(hub fork 2>&1 | grep -oE 'remote:? \S+' | tail -1 | awk '{print $2}')"

git push -u "$fork_remote" "$branch"

hub pull-request -m "${brew_name} ${version#v}"

git checkout -q -

#!/bin/bash

# Usage: script/release

#

# - checks out the master branch

# - changes version in `bin/ruby-build` to current date

# - commits and tags the change

# - pushes master + tag to GitHub

# - opens pull request to update the Homebrew formula

#

# TODO: handle making multiple releases on the same date

# TODO: publish release notes to GitHub

set -e

git fetch -q --tags origin master

existing="$(git tag --points-at HEAD)"

if [ -n "$existing" ]; then

  echo "Aborting: HEAD is already tagged as '${existing}'" >&2

  exit 1

fi

git checkout -q master

binfile="bin/ruby-build"

new_version="$(date '+%Y%m%d')"

version_tag="v${new_version}"

previous_tag="$(git tag | grep '^v' | sort | tail -1)"

if git diff --quiet "${previous_tag}..HEAD" -- bin share; then

  echo "Aborting: No features to release since '${previous_tag}'" >&2

  exit 1

fi

# current="$($binfile --version | awk '{print $2}')"

sed -i.bak -E "s!^(RUBY_BUILD_VERSION=).+!\\1\"${new_version}\"!" "$binfile"

rm -f "${binfile}.bak"

git commit -m "ruby-build ${new_version}" "$binfile"

git tag "$version_tag"

git push origin master "${version_tag}"

# git log --no-merges --format='%w(0,0,2)* %B' --reverse "${previous_tag}..HEAD^" -- bin share

script/brew-publish ruby-build "$version_tag"