#!/bin/bash
# waits for commits on any branch on origin, checks it out and builds it

. .aliases

while true; do
    echo "Checking for new commits on any branch ..."
    git fetch origin
    branch_with_new_commits=`git fetch origin >/dev/null; git for-each-ref --format='%(refname:short) %(upstream:track)' refs/heads | grep '\[behind' | cut -d' ' -f1 | head -n1`

    if [ -n "$branch_with_new_commits" ]; then
          echo "checking out branch: $branch_with_new_commits"
          if git show-ref --quiet --heads "$branch_with_new_commits"; then
              echo "Branch $branch_with_new_commits already exists. Checking it out and pulling latest changes."
              git checkout "$branch_with_new_commits"
              git pull origin "$branch_with_new_commits"
          else
              echo "Creating and checking out new branch: $branch_with_new_commits"
              git checkout -b "$branch_with_new_commits" "origin/$branch_with_new_commits"
          fi

          echo "building ..."
          ./gradlew test
    fi

    # wait 10s with a little animation
    echo -e -n " waiting for changes (/) ..."
    sleep 2
    echo -e -n "\r\033[K waiting for changes (-) ..."
    sleep 2
    echo -e -n "\r\033[K waiting for changes (\) ..."
    sleep 2
    echo -e -n "\r\033[K waiting for changes (|) ..."
    sleep 2
    echo -e -n "\r\033[K waiting for changes ( ) ... "
    sleep 2
    echo -e -n "\r\033[K checking for changes"
done