Install AUR packages automatically.

aur-install.sh

#!/bin/bash

#------------
# This script installs Arch User Repository packages automatically.
# Learn more here:
# https://wiki.archlinux.org/index.php/Arch_User_Repository
#
# (C)2018 Gustavo R. Rehermann. The MIT License.
#------------

BAD_DEP_EXTS=("so" "h" "dll" "la" "a")

if [ "$EUID" -ne 0 ]; then
    echo "You need to run this program with 'sudo' to be able to install AUR packages."

    exit 1
else
    if [ -z "$SUDO_USER" ]; then
        echo "You can't run the aur-install script as root, for security reasons."
        
        exit 1
    fi
fi

if [ -z "$1" ]; then
    echo "Select a package to install!"
    echo "Syntax: aur-install <package>"

    exit 1
fi

if [ "$(curl -o "/dev/null" --silent --head --write-out '%{http_code}\n' "https://aur.archlinux.org/cgit/aur.git/snapshot/$1.tar.gz")" == "404" ]; then
    echo "Error: Repository snapshot not found in the AUR! Are you sure it exists? Try using 'pacman -S $1' to check if it already exists in the official repos."

    exit 1
fi

begindir="$(pwd)"

printf "Preparing folders and permission stuff... "
SUHOME="/home/$SUDO_USER"
mkdir -p "/var/log/aurins" "/var/cache/aurins" >/dev/null 2>"/var/log/aurins/$1.log" || {
    echo "error starting up folders! Check '/var/log/aurins/$1.log' for more."
    exit 2
}
chown -R "$SUDO_USER:$SUDO_USER" "$SUHOME/.aurins-build" >/var/log/aurins/$1.log 2>&1 || {
    echo "error disowning build folder from root! Check '/var/log/aurins/$1.log' for more."
    exit 2
}
chmod -R 775 "$SUHOME/.aurins-build" >/var/log/aurins/$1.log 2>&1 || {
    echo "error changing build folder permissions! Check '/var/log/aurins/$1.log' for more."
    exit 2
}

printf "done.\\nDownloading the latest snapshot for %s... " "$1"
curl -s -o "/var/cache/aurins/$1.tar.gz" "https://aur.archlinux.org/cgit/aur.git/snapshot/$1.tar.gz" 2>"/var/log/aurins/$1.log"  || {
    echo "error downloading the package! Check '/var/log/aurins/$1.log' for more."
    exit 2
}

printf "done.\\nExtracting the snapshot file... "
{ sudo -u $SUDO_USER mkdir -p "$SUHOME/.aurins-build/$1" >/dev/null 2>"/var/log/aurins/$1.log"; } || {
    echo "error starting up folders! Check '/var/log/aurins/$1.log' for more."
    exit 2
}
{ sudo -u $SUDO_USER tar -xzf "/var/cache/aurins/$1.tar.gz" -C "$SUHOME/.aurins-build" >>"/var/log/aurins/$1.log" 2>&1; } || {
    echo "error extracting the package! Check '/var/log/aurins/$1.log' for more."
    exit 2
}

echo "done."

cd "$SUHOME/.aurins-build/$1" 2>>"/var/log/aurins/$1.log" || {
    echo "Can't cd to the extracted package directory! (Are you sure sudo is fine? Maybe he needs some medication...)"
    exit 3
}

eval $(pcregrep -M "depends\=\(([\'\"].*?[\'\"];?\s*)*\)" "./PKGBUILD")
test -v makedepends && {
    depends+=( "${makedepends[@]}" )
}

if [ ${#depends[@]} -ne 0 ]; then
    pacdeps=()

    for dep in "${depends[@]}"; do
        ( for ext in "${BAD_DEP_EXTS[@]}"; do
            if [[ $dep == *.$ext ]]; then
                exit 1
                
            fi
            
            pacman -Qi $dep >/dev/null 2>&1 && exit 1
        done ) && pacdeps+=($dep)
    done
    
    if [ ${#pacdeps[@]} -ne 0 ]; then
        echo "Found dependencies:"
        for pd in "${pacdeps[@]}"; do
            echo " - $pd"
        done
        
        printf "Installing the package's dependencies... "

        pacman -S --noconfirm "${pacdeps[@]}" >>"/var/log/aurins/$1.log" 2>&1 || {
            echo "error installing dependencies! Check '/var/log/aurins/$1.log' for more."
            exit 2
        }
        
        echo "done."
    fi
fi

printf "Building the package... "
{ sudo -u $SUDO_USER makepkg; } >>"/var/log/aurins/$1.log" 2>&1 || {
    echo "error building the package! Check '/var/log/aurins/$1.log' for more."
    exit 2
}
printf "done.\\nInstalling the package..."
{ sudo -u $SUDO_USER makepkg --install; } >>"/var/log/aurins/$1.log" 2>&1 || {
    echo "error installing the package! Check '/var/log/aurins/$1.log' for more."
    exit 2
}
{ sudo -u $SUDO_USER makepkg --clean; } >>"/var/log/aurins/$1" 2>&1 || {
    echo "error cleaning up the package folder! Check '/var/log/aurins/$1.log' for more."
    exit 2
}

printf "done.\\nInstalled everything succesfully."

cd "$begindir" >/dev/null 2>&1 || {
    echo "Whoops! For some reason I couldn't cd back to your starting directory. Could you do it for me? Thanks!"
}

exit 0