#!/usr/bin/env bash

__SOURCE__="${BASH_SOURCE[0]}"

while [[ -h "${__SOURCE__}" ]]; do

__SOURCE__="$(find "${__SOURCE__}" -type l -ls | sed -n 's@^.* -> \(.*\)@\1@p')"

done

__DIR__="$(cd -P "$(dirname "${__SOURCE__}")" && pwd)"

__NAME__="${__SOURCE__##*/}"

__AUTHOR__='S0AndS0'

__DESCRIPTION__='Short-cut to "git checkout" for named repository'

## Provides 'failure'

source "${__DIR__}/shared_functions/modules/trap-failure/failure.sh"

trap 'failure "LINENO" "BASH_LINENO" "${BASH_COMMAND}" "${?}"' ERR

## Provides: argument_parser <arg-array-reference> <acceptable-arg-reference>

source "${__DIR__}/shared_functions/modules/argument-parser/argument-parser.sh"

## Provides: __license__ <description> <author>

source "${__DIR__}/shared_functions/license"

usage(){

_message="${1}"

_repo_name="${_repo_name:-repository-name}"

_branch="${_branch:-new-branch-name}"

_branch_name="${_branch_name:-existing-branch-name}"

cat <<EOF

## Usage

# ssh ${USER}@host-or-ip ${__NAME__} ${_git_args[@]:-$_repo_name}

#

# ${__DESCRIPTION__}

#

# --branch -b="new-branch-name"

# Check out new branch within ${_repo_name} with: git checkout -b ${_branch}

#

# ${_branch_name}

# Check out exsisting branch within ${_repo_name} with: git checkout ${_branch_name}

#

# ${_repo_name}

# Name of repository to initialize

#

# -l --license

# Shows script or project license then exits

#

# -h --help help

# Display this message and exit

EOF

(("${#_message}")) && [[ "${_message}" != '0' ]] && {

printf >&2 'Error - %s\n' "${_message}"

}

}

_args=("${@:?# No arguments provided try: ${__NAME__} help}")

_valid_args=('--help|-h|help:bool'

'--license|-l|license:bool'

'--branch|-b:posix'

'--branch-name:posix-nil'

'--repo-name:posix-nil')

argument_parser '_args' '_valid_args'

_exit_status="$?"

## Catch --branch <name> <repo>

(("${#_branch}")) && {

_repo_name="${_branch_name}"

_branch_name=''

}

if ((_help)) || ((_exit_status)); then

usage "${_exit_status}"

exit "${_exit_status}"

elif ((_license)); then

__license__ "${__DESCRIPTION__}" "${__AUTHOR__}"

exit 0

fi

(("${#_repo_name}")) || {

usage 'missing repository name argument!'

exit "1"

}

! (("${#_branch}")) && ! (("${#_branch_name}")) && {

usage 'missing "--branch" or "--branch-name" argument!'

exit "1"

}

_git_path="${HOME}/git/${_repo_name:?# No repository name provided}"

[[ -d "${_git_path}" ]] || {

usage "no repository found with ${_repo_name}"

exit "1"

}

[[ -d "${_git_path}/.git" ]] || {

usage "directory found with ${_repo_name} but not initialized correctly"

exit "1"

}

_git_args=()

if (("${#_branch}")); then

_git_args+=('-b' "${_branch}")

elif (("${#_branch_name}")); then

_git_args+=("${_branch_name}")

else

usage 'missing "--branch" or "--branch-name" argument!'

exit 1

fi

_old_PWD="${PWD}"

cd "${_git_path}" || exit 1

git checkout ${_git_args[@]}

_git_exit_status="${?}"

[[ "${_old_PWD}" == "${_git_path}" ]] || {

cd "${_old_PWD}"

}

((_git_exit_status)) && {

printf >&2 '%s encountered errors!\n' "${__NAME__}"

exit 1

}

printf '%s finished!\n' "${__NAME__}"