#!/usr/bin/env bash
#
# Apply the scoutfs-notify patch series to a scoutfs working tree.
#
# Usage:  apply.sh /path/to/scoutfs
#
set -euo pipefail

HERE=$(cd "$(dirname "$0")" && pwd)
TREE="${1:?usage: $0 /path/to/scoutfs}"

if [ ! -d "$TREE/.git" ]; then
    echo "error: $TREE is not a git working tree" >&2
    echo "hint: use 'patch -p1' directly for tarball trees (see README)" >&2
    exit 2
fi

BASE="$(head -n1 "$HERE/base.txt" | awk '{print $1}')"
if [ -n "$BASE" ]; then
    if ! git -C "$TREE" rev-parse --verify "$BASE" >/dev/null 2>&1; then
        echo "warning: base '$BASE' not found in target tree" >&2
    fi
fi

cd "$TREE"
git am --3way --keep-cr "$HERE"/patches/*.patch