#!/usr/bin/env bash

source "${PALUDIS_EBUILD_DIR}/echo_functions.bash"

old_set=$-
set -a
for f in ${PALUDIS_BASHRC_FILES}; do
    [[ -f "${f}" ]] && source "${f}"
done
[[ "${old_set}" == *a* ]] || set +a

LOCAL=
REMOTE=

GIT_CLONE_OPTIONS=( )
GIT_PULL_OPTIONS=( )

while [[ $# -gt 0 ]]; do
    case "${1}" in

        --git-clone-option=*)
            GIT_CLONE_OPTIONS[${#GIT_CLONE_OPTIONS[@]}]="${1#*=}"
            ;;

        --git-pull-option=*)
            GIT_PULL_OPTIONS[${#GIT_PULL_OPTIONS[@]}]="${1#*=}"
            ;;

        --help)
            PROTO="${0##*/do}"
            if [[ "${PROTO}" == git ]]; then
                echo "    URL syntax: git://SERVER/PATH"
            elif [[ "${PROTO}" == git+ssh ]]; then
                echo "    URL syntax: git+ssh://[USERNAME[:PASSWORD]@]SERVER/PATH"
            elif [[ "${PROTO}" == git+http || "${PROTO}" == git+https ]]; then
                echo "    URL syntax: ${PROTO}://[USERNAME[:PASSWORD]@]SERVER[:PORT]/PATH"
            elif [[ "${PROTO}" == git+file ]]; then
                echo "    URL syntax: git+file:///PATH"
            elif [[ "${PROTO}" == git+rsync ]]; then
                echo "    URL syntax: git+rsync://[USERNAME@]SERVER[:PORT]/PATH"
            else
                ewarn "URL syntax for ${PROTO} is unknown.  This script will likely not work with the ${PROTO} protocol"
            fi

            echo "    Options:"
            echo "        --git-clone-option=OPTION       Pass OPTION to git clone"
            echo "        --git-pull-option=OPTION        Pass OPTION to git pull"
            exit 0
            ;;

        --*)
            ewarn "${0}: unknown option '${1%%=*}'"
            ;;

        *)
            if [[ -z "${LOCAL}" ]]; then
                LOCAL="${1}"
            elif [[ -z "${REMOTE}" ]]; then
                REMOTE="${1}"
            else
                eerror "${0}: extra argument '${1}'"
                exit 1
            fi
            ;;

    esac
    shift
done

if [[ -z "${LOCAL}" ]]; then
    eerror "${0}: unspecified local repository directory"
    exit 1
elif [[ -z "${REMOTE}" ]]; then
    eerror "${0}: unspecified remote repository URL"
    exit 1
fi

[[ "${REMOTE}" == git+http* || "${REMOTE}" == git+rsync* ]] && REMOTE="${REMOTE#git+}"
REMOTE="${REMOTE#git+file://}"

if [[ -d "${LOCAL}" && ! -d "${LOCAL}/.git" ]]; then
    eerror "'${LOCAL}' exists but it is not a Git repository"
    exit 1
fi

if [[ -d "${LOCAL}" ]]; then
    cd "${LOCAL}"
    OLD_REMOTE="$(${GIT_WRAPPER} git config remote.origin.url)"
    if [[ -z "${OLD_REMOTE}" && -f .git/remotes/origin ]]; then
        OLD_REMOTE="$(sed -ne '/^URL: */{s/^URL: *//p;q}' .git/remotes/origin)"
    fi
    if [[ "${OLD_REMOTE}" != "${REMOTE}" ]]; then
        if ! ${GIT_WRAPPER} git config remote.origin.url "${REMOTE}"; then
            eerror "${0}: could not switch from '${OLD_REMOTE}' to '${REMOTE}'"
            exit 1
        fi
    fi
    cd - >/dev/null
fi

if [[ -d "${LOCAL}/.git" ]]; then
    cd "${LOCAL}" && ${GIT_WRAPPER} git pull "${GIT_PULL_OPTIONS[@]}" origin
else
    ${GIT_WRAPPER} git clone "${GIT_CLONE_OPTIONS[@]}" "${REMOTE}" "${LOCAL}"
fi

