Downloader for Git Bash for Windows

git-downloader

#!/usr/bin/env bash

##################################################################
#  Automatically download Git Bash for Windows portable version  #
##################################################################
# Quick running:
#   curl -Ls https://gist.githubusercontent.com/andkirby/16e3c7e4be8bac4c6b3bd0ae8f713552/raw/git-downloader | bash
##################################################################


set -o pipefail
set -o errexit
set -o nounset
#set -o xtrace

# Set magic variables for current file & dir
__dir="$(cd "$(dirname "${BASH_SOURCE[0]}")" && pwd)"
__file="${__dir}/$(basename "${BASH_SOURCE[0]}")"
readonly __dir __file

if [ -z "${${EXEPATH}" ]; then
  echo "Sorry, it does not look like you use Git Bash for Windows." >&2
  exit 2
fi

api_releases=$(curl --silent --location https://api.github.com/repos/git-for-windows/git/releases/latest)

app_bitness=64

download_url=$(echo ${api_releases} | grep -Eo 'https://[^" ]+Portable[^" ]+64[^ "]+\.exe')

download_file=$(echo ${download_url} | awk -F '/' '{print $NF}')

release_version=$(echo ${download_url} | grep -Eo '\/v.*?\/' | tr -d '\/v')

current_version=$(git --version | grep -Eo '[0-9.]+[^ ]+')

if [[ "${current_version}" == "${release_version}" ]]; then
  echo "You have the Git For Windows same version (${current_version})." >&2
  exit 3
fi

if [[ ! -e ${HOME}/${download_file} ]]; then
  curl --silent --location --output ${HOME}/${download_file} ${download_url}
fi

echo "Downloaded File: ${HOME}/${download_file}"
echo "You Git path: ${EXEPATH}"

echo "Close GitBush and run the package:"
echo
echo "  "$(echo ${HOME}/${download_file} | sed -r 's|/(\w)/|\1:/|')