#!/usr/bin/env bash

# Opens the GitHub page for a repo/branch in your browser.
# https://github.com/paulirish/git-open/
#
# git open
# git open [remote] [branch]


# are we in a git repo?
if ! git rev-parse --is-inside-work-tree &>/dev/null; then
  echo "Not a git repository." 1>&2
  exit 1
fi

# assume remote origin if not provided
remote=${1:-"origin"}

# @TODO ls-remote will also expand "insteadOf" items `giturl=$(git ls-remote --get-url $remote)``
giturl=$(git config --get "remote.${remote}.url")

if [[ -z "$giturl" ]]; then
  echo "Git remote is not set for $remote" 1>&2
  exit 1
fi

# Initial case examples: 'git@example.com:user/project', 'https://example.com:8080/scm/user/project.git/'
# Trim "/" and ".git" from the end of the url
giturl=${giturl%/} giturl=${giturl%.git}

# Trim before last '@' and protocol (*://) from beginning
uri=${giturl##*@} uri=${uri##*://}

# Trims before first ':' or '/' to get path
path=${uri#*[/:]}

# Trims after first ':' or '/' to remove path
server=${uri%%[/:]*}

# Get current branch
branch=${2:-$(git symbolic-ref -q --short HEAD)}

providerUrlDifference="tree"
case "$server" in
    "bitbucket.org") providerUrlDifference="src" ;;
esac

# @TODO: support non-https?
openurl="https://$server/$path"

# simplify URL for master
if [[ $branch != "master" ]]; then
    # Make # and % characters url friendly
    #   github.com/paulirish/git-open/pull/24
    branch=${branch//%/%25} branch=${branch//#/%23}
    openurl="$openurl/$providerUrlDifference/$branch"
fi

# get current open browser command
case $( uname -s ) in
  Darwin)  open=open;;
  MINGW*)  open=start;;
  CYGWIN*) open=cygstart;;
  MSYS*)   open="powershell.exe –NoProfile Start";;
  *)       open=${BROWSER:-xdg-open};;
esac

# if testing, log results to stdout. otherwise, mute the output
if [ "$BATS_CWD" ]; then
  open=echo
else
  exec &>/dev/null
fi;

# open it in a browser
$open "$openurl"

exit $?