release.sh

#!/bin/bash

bold=$(tput bold)
normal=$(tput sgr0)

set -e

echo "-----------------------------------------------"
echo "        🚀 Creating a new release  🚀"
echo "-----------------------------------------------"

# Get the current version from the package.json
CURRENT=$(cat package.json \
  | grep version \
  | head -1 \
  | awk -F: '{ print $2 }' \
  | sed 's/[",]//g' \
  | tr -d '[[:space:]]')

# Prompt the user for the new release version
printf "Current release version:${bold} ${CURRENT} ${normal}\n"
printf "Please enter new release version: "
read -r RELEASE

if [ -z $RELEASE ]; then
  echo "Please specify a release number"
  exit 1
fi

printf "Bumping version from ${bold} ${CURRENT} ${normal} 👉 ${bold} ${RELEASE} ${normal} \n"

# Show a little progress bar animation
prog() {
  local w=80 p=$1;  shift
  # create a string of spaces, then change them to dots
  printf -v dots "%*s" "$(( $p*$w/100 ))" ""; dots=${dots// /.};
  # print those dots on a fixed-width space plus the percentage etc.
  printf "\r\e[K|%-*s| %3d %% %s" "$w" "$dots" "$p" "$*";
}

# Fake a timeout for fun
for x in {1..100} ; do
  prog "$x"
  sleep .01   # do some work here
done ; echo

# Create & switch to the release branch
git checkout -b release-$RELEASE

# Bump the package.json & package-lock.json versions
# https://docs.npmjs.com/cli/version
npm version $RELEASE --no-git-tag-version

# Commit & push the release branch to GitHub
git add .
git commit -am "Bump version to $RELEASE"
git push origin release-$RELEASE