common

#!/bin/bash

set -e

if [[ -n $DEBUG ]]; then
  set -x
fi

# Warn if current branch is not develop and/or not inline with upstream
verify_branch() {
  git fetch

  if [ "develop" != "$(basename "$(git symbolic-ref -q HEAD)")" ]; then
    echo "┏━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━┓">&2
    echo "┃   🚨  You are not on develop 🚨    ┃">&2
    echo "┗━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━┛">&2
  fi

  echo "==> Current commit id: $(git rev-parse HEAD)" >&2

  count="$(git rev-list --count --left-right "@{upstream}...HEAD")"
  case "$count" in
    "")
      echo "==> You do not have an upstream set" >&2 ;;
    "0	0") 
      return ;;
    "0	"*)
      echo "==> Your branch is ${count#0	} commits ahead of the upstream" >&2 ;;
    *"	0")
      echo "==> Your branch is ${count%	0} commits behind upstream" >&2 ;;
    *)
      echo "==> Your branch is ${count#*	} ahead and ${count#	*} behind upstream" >&2 ;;
  esac

  if [ "y" != "$(prompt "Do you wish to continue [y/N]: ")" ]; then
    exit 1
  fi
}

identify_repo() {
  REMOTE_URL="$(git remote get-url origin)"

  if [[ "$REMOTE_URL" =~ ^https://github.com/ ]]; then
    REPOSITORY_NAME="${REMOTE_URL##https://github.com/}"
  elif [[ "$REMOTE_URL" =~ ^git@github.com:.*\.git$ ]]; then
    REPOSITORY_NAME="${REMOTE_URL##git@github.com:}"
    REPOSITORY_NAME="${REPOSITORY_NAME%%.git}"
  else
    echo "origin does not appear to be a valid GitHub Remote URL: ${REMOTE_URL}"
    exit 1
  fi
}

identify_release() {
  BRANCH_NAME=$(branch_name)
  if [[ ! "${BRANCH_NAME}" =~ ^release/.* ]]; then
    echo "┏━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━┓">&2
    echo "┃   🚨 Not on a release branch 🚨   ┃">&2
    echo "┗━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━┛">&2
    exit 1
  fi
  RELEASE_TAG="${BRANCH_NAME##*/}"
}

update_release_numbers() {
  VERSION_NUMBER="$(update_version_number)"
  RELEASE_NAME="$(prompt "Enter a name for this release: ${VERSION_NUMBER}-")"
  RELEASE_TAG="${VERSION_NUMBER}-${RELEASE_NAME}"
}

create_release_branch() {
  BRANCH_NAME="release/${RELEASE_TAG:?must be defined}"

  echo "==> Creating branch ${BRANCH_NAME}"
  git checkout -b "$BRANCH_NAME"
}

tag_release_notes() {
  local temp_file
  temp_file=$(mktemp)

  REPOSITORY_NAME="${REPOSITORY_NAME:?must be defined}"
  RELEASE_TAG="${RELEASE_TAG:?must be defined}"

  cat - "release_notes.md" <<RELEASE_NOTES_HEADER > "$temp_file"
- - -
## [${RELEASE_TAG}](https://github.com/${REPOSITORY_NAME}/releases/tag/${RELEASE_TAG})
Date: $(date +"%d %B %Y")

RELEASE_NOTES_HEADER

  mv "${temp_file}" "release_notes.md"
  git add "release_notes.md"
}

update_version_number() {
  local version_number

  # Get the current version number
  version_number=$(read_version_number)

  # Ask for the new one
  new_version_number=$(prompt "Enter version number [${version_number}]: ")

  # Use the current version if none was specified
  if [[ -z $new_version_number ]]; then
    new_version_number=$version_number
  fi

  # Put it back
  write_version_number "${new_version_number}"
  echo "${new_version_number}"
}

prompt() {
  local input
  echo -n "==> $1" >&2
  read -r input
  echo "$input"
}

read_version_number() {
  cat "version"
}

write_version_number() {
  echo "$1" > "version"
  git add "version"
}

commit_message() {
  RELEASE_TAG="${RELEASE_TAG:?must be defined}"

  cat <<COMMIT_MESSAGE
Preparing release ${RELEASE_TAG}
#
# To abort: Empty this file, Save and exit
COMMIT_MESSAGE
}

branch_name() {
  git symbolic-ref --short HEAD
}

github_api_request() {
  GITHUB_TOKEN="${GITHUB_TOKEN:-$(github_token)}"
  curl -s -H "Authorization: token $GITHUB_TOKEN" "$@"
}

github_token() {
  git credential fill <<<"host=github.com" | awk -F '=' '/password/{print $2}'
}