INSTALL

#!/bin/bash

# Run command silently.
_q() {
    eval "$@" &>/dev/null;
}

# If the distro is Arch (and yaourt is installed),
#   use yaourt to install the package from the aur.
_testDistro() {
    [[ "$(_distro)" == "Arch" ]] || 
        return;
    yaourt -Sa "${PKG}" &&
        exit 0;
}

# Return distro name.
# Arch is the default.
# If running Fedora, make sure `lsb_release` or `redhat-lsb` is installed.
_distro() {
    if [[ "$(ls /bin | grep lsb_release)" == "" ]]; then
        echo "Arch" ;
    else
        echo "$(lsb_release -si)" ;
    fi ;
}

# Download the package
#   (if it hasn't been downloaded already).
_verifyDownload() {
    # Move down into the package directory.
    # pushd 1
    [ -d "${PKG}" ] && 
        _q pushd "${PKG}";

    # Quit if the download and extraction was successful.
    _q ls -d Archdroid* && 
        return 0;    

    # Otherwise, download it.
    _download;
    TEMP_DL=0;

    # Loop back to top.
    _verifyDownload;
}

# Download xz package from github.
_download() {
    # Clean up any previous downloads
    _q ls ${PKG}* &&
        rm ${PKG}*;

    # Make sure all commands run successfully.
    # If they do, return.
    (
        wget "${SRC}" &&
        xz -dv "${PKG}.tar.xz" &&
        tar -xf "${PKG}.tar" &&
        rm "${PKG}.tar";
    ) && 
        return 0;

    # Otherwise, give up.
    # Ask the user to download it instead.
    local scriptDir;
    scriptDir="$(dirname $0)";
    [[ "${scriptDir}" == "." ]] &&
        scriptDir="${PWD}";

    cat << EOH >&2
Failed to download the package.
Try downloading it manually from here:
${SRC}
Then place ${PKG}.tar.xz in this folder:
${scriptDir}
Then rerun $0
EOH

    exit 1;
}

# Install the package locally.
_install() {
    local -a Themes;
    local dest curr t;

    Themes=( $(ls) );
    dest="/usr/share/icons";
    curr="${PWD}";

    # Set up destination directories.
    for t in "${Themes[@]}"; do
        [ -d "${t}" ] &&
            sudo install -dm 755 "${dest}/${t}";
    done ;

    # Copy themes to the destination directories.
    sudo cp -drf --no-preserve='ownership' . "${dest}/";

    # Update 'icon-theme.cache' for each of the themes.
    # pushd 2
    _q pushd "${dest}";
    for t in "${Themes[@]}"; do
        echo "${t}";
        sudo gtk-update-icon-cache -ftq "${t}";
    done;
    # popd 2
    _q popd;
}

# Remove any temporary files that this script downloaded.
_cleanUp() {
	cd "${ROOT}";
    # popd all
	dirs -c;

    # If this script didn't download anything (i.e., the repo was git cloned),
    #   don't remove anything.
	[ "${TEMP_DL}" ] || 
        return;

	[ -d "${THEME_DIR}" ] &&
	   rm -R "${THEME_DIR}";
}

declare -r ROOT="${PWD}";
declare -r PKG="archdroid-icon-theme";
declare -r REPO="https://raw.githubusercontent.com/GreenRaccoon23";
declare -r SRC="${REPO}/${PKG}/master/${PKG}.tar.xz";

# Install through the aur if running Arch.
_testDistro;

# Otherwise, install directy from the git repo.
# Download the .xz package if it hasn't been yet.
declare TEMP_DL;
_verifyDownload;

# At this point, $PWD should be 'archdroid-icon-theme/archdroid-icon-theme'.
declare -r THEME_DIR="${PWD}";
_install;

# Remove any temporary files that this script downloaded.
_cleanUp;