#!/usr/bin/env bash

set -o errexit -o nounset -o pipefail
shopt -s inherit_errexit lastpipe

script_path="$( readlink --canonicalize-existing -- "${BASH_SOURCE[0]}" )"
readonly script_path
script_dir="$( dirname -- "$script_path" )"
readonly script_dir

update_gems() {
    echo
    echo ======================================================================
    echo Updating gems
    echo ======================================================================
    bundle config set frozen false
    bundle update
    echo ----------------------------------------------------------------------
}

push_changes() {
    echo
    echo ======================================================================
    echo Pushing changes
    echo ======================================================================

    local git_status
    git_status="$( git status --porcelain=v1 )"

    if [ -z "$git_status" ]; then
        echo 'No changes.'
        echo ----------------------------------------------------------------------
        return
    fi

    if [ "$git_status" != ' M Gemfile.lock' ]; then
        echo 'Error: unrecognized modifications in the repository:'
        echo "$git_status"
        echo ----------------------------------------------------------------------
        return 1
    fi

    git commit -am 'bump dependencies'
    git push -q
    echo ----------------------------------------------------------------------
}

main() {
    cd -- "$script_dir/.."
    update_gems
    push_changes
}

main