#!/usr/bin/env bash

set -eu
set +x

# This script links tools from their place in the bazel-bin dir to the provided
# directory. This directory should be on your $PATH if you want to actually
# make any use of this script.

bin="$1"
HACK_TOOLS_TARGET="${HACK_TOOLS_TARGET:-"//hack:tools_to_link"}"

echo "linking tools to $1"

if [[ "$2" == "$HACK_TOOLS_TARGET" ]]; then
    echo "building dev tools..."
    # if its the filegroup with the required set of dev tools, dont perform
    # the additional _binary query because it dont work

    # shellcheck disable=SC2207
    targets=($(bazel cquery --output=files "$HACK_TOOLS_TARGET"))
else
    # remove specific _linux variants (relying on host configuration) defined for 
    # binaries and remove container binaries from link targets. we only want to link
    # whatever binaries would be built for the host platform.

    echo "querying Bazel expression for binaries to link"

    # shellcheck disable=SC2207
    targets=($(bazel cquery --output=files "kind(.*_binary, ${2})" | grep -Ev "_linux|container.binary"))
fi


for b in "${targets[@]}"; do
    dst="${bin}/$(basename "$b")"
    rm -f "$dst"
    ln -sf "$PWD/$b" "$dst"
    echo "$b --> $dst"
done