#!/usr/bin/env bash
# SPDX-License-Identifier: GPL-2.0-only

build() {
    local fsck='' added=0

    add_fsck() {
        case "$1" in
            ext[234])
                add_binary e2fsck
                add_symlink /usr/bin/fsck.ext2 e2fsck
                add_symlink /usr/bin/fsck.ext3 e2fsck
                add_symlink /usr/bin/fsck.ext4 e2fsck
                if [[ -e /etc/e2fsck.conf ]]; then
                    add_file /etc/e2fsck.conf
                fi
                ;;
            xfs)
                add_binary fsck.xfs
                add_binary xfs_repair
                ;;
            *)
                if compgen -c "fsck.$1" &>/dev/null; then
                    add_binary "fsck.$1"
                else
                    return 1
                fi
                ;;
        esac
    }

    # fs_autodetect_failed is assigned in the autodetect hook
    # shellcheck disable=SC2154
    if (( ! fs_autodetect_failed )) && [[ -n "${rootfstype}${usrfstype}" ]]; then
        if [[ -n "$rootfstype" ]]; then
            add_fsck "$rootfstype" && (( ++added ))
        fi
        if [[ -n "$usrfstype" && "$usrfstype" != "$rootfstype" ]]; then
            add_fsck "$usrfstype" && (( ++added ))
        fi
    else
        for fsck in $(compgen -c fsck.); do
            add_fsck "${fsck#fsck.}" && (( ++added ))
        done
    fi

    if (( ! added )); then
        warning "No fsck helpers found. fsck will not be run on boot."
        return
    fi

    add_binary fsck
}

help() {
    cat <<HELPEOF
This hook provides fsck and filesystem specific helpers to perform an fsck
operation on the root device prior to mounting. If the autodetect hook is used,
only the fsck helper specific to your filesystem will be added to the image. It
is highly recommended that if you include this hook that you also include any
necessary modules to ensure your keyboard will work in early userspace.

To control the behavior of fsck on bootup, fsck.mode=force can be passed on
the kernel command line to insist on running a full filesystem check. Similarly
fsck.mode=skip can be passed to cause fsck not to run at all.
HELPEOF
}

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