#!/bin/sh

set -e

if [ "$#" -ne 1 ]; then
    echo "$0: error: usage: $0 <tree-ish>"
    exit 1
fi


SRCROOT="$(realpath $(pwd))"
TREEISH="${1}"

# Form the destination path.
if (expr "${TREEISH}" : "llbuild.*"); then
    DSTNAME="${TREEISH}"
else
    DSTNAME="llbuild-${TREEISH}"
fi
DST="/tmp/${DSTNAME}"

# The destination path must not exist...
echo "note: installing sources from '${SRCROOT}' to '${DST}'"
if [ -e "${DST}" ]; then
    echo "$0: error: destination directory ('${DST}') already exists"
    exit 1
fi

# Exclude SCM, temporary files, and any large test inputs.
mkdir "${DST}"
rsync -arv "${SRCROOT}/" "${DST}/" \
    --exclude .git \
    --exclude "*~" \
    --exclude "*.pyc" \
    --exclude build \
    --exclude docs/_build \
    --exclude experiments \
    --exclude utils/Xcode/FileCheck \
    --exclude perftests/Inputs