#!/bin/bash

if [ "$#" -ne 1 ]; then
    echo "Usage: "$(basename $0)" aur_package_dir"
    echo
    echo "This simple script when passed a directory where clones of AUR repositories are"
    echo "will iterate over then directory by directory and if any of them contains"
    echo "a PKGBUILD file then with pkgname will see if this package is installed"
    echo "and if it is will perform git reset --hard + git pull, check for pkgver/pkgrel"
    echo "against what is installedand call makepkg -sri in case they differ"
    exit 1
fi

pushd $1 > /dev/null

for dir in */; do    
    pushd $dir > /dev/null

    if [ -f PKGBUILD ]; then
        pkgbase=$(grep -m 1 pkgbase PKGBUILD | cut -d '=' -f 2)
        pkgname=$(grep -m 1 pkgname PKGBUILD | cut -d '=' -f 2)

        if [ ! -z "$pkgname" ]; then
            pkg_info=$(pacman -Qi $pkgname 2>&1)
            if [ $? -eq 0 ]; then
                installed_version=`echo "$pkg_info" | grep -m 1 Version | sed s'/Version         ://g' | xargs`
                echo "----- Found installed package "$pkgname" version: "$installed_version
                git reset --hard
                git pull
                pkgver=$(grep -m 1 pkgver PKGBUILD | cut -d '=' -f 2 | xargs)
                pkgrel=$(grep -m 1 pkgrel PKGBUILD | cut -d '=' -f 2 | xargs)
                git_version="${pkgver}-${pkgrel}"
                echo "----- Git version of this package is "$git_version
                if [ "$installed_version" != "$git_ver" ]; then
                    echo "----- Package "$pkgname" version: "$installed_version" has git version: "$git_version" will reinstall"
                    makepkg -sri
                fi
            fi
        fi
    fi
    
    popd > /dev/null
done

popd > /dev/null