bazelwrapper

#!/bin/bash

set -e
# Make sure we're in the project root directory.
SCRIPTPATH="$( cd "$(dirname "${BASH_SOURCE[0]}")" >/dev/null 2>&1 ; pwd -P )"
pushd "$SCRIPTPATH/.." > /dev/null


BAZEL="${SCRIPTPATH}/bazel"

function clean() {
    echo "INFO: Bazel force cleaning"
    $BAZEL clean --expunge

    # The Bazel server can have issues across Bazel versions
    killall -9 bazel || true
}

XCODE_SELECT_ENV_PATH="${PWD}/.xcode_select_env"
CURRENT_XCODE_PATH="$(/usr/bin/xcode-select -p)"
XCODE_VERSION=$(/usr/bin/xcodebuild -version | grep Xcode | cut -d ' ' -f2)
CURRENT_XCODE_HASH="${CURRENT_XCODE_PATH}-${XCODE_VERSION}-${BAZEL_VERSION}"
if [[ -f "${XCODE_SELECT_ENV_PATH}" ]]; then
    EXISTING_XCODE_HASH="$(cat "${XCODE_SELECT_ENV_PATH}")"
    if [[ $EXISTING_XCODE_HASH != "${CURRENT_XCODE_HASH}" ]]; then
        echo "Xcode select path or Bazel version has changed, must clear cached data"
        clean
    fi
fi

echo "${CURRENT_XCODE_HASH}" > "${XCODE_SELECT_ENV_PATH}"
if [[ -n $BAZEL_FORCE_CLEAN ]]; then
    clean
fi


# Make variable support
# In the context of Xcode builds, variables are defined as "Make variable"
# strings.
# In practice, the variables are stored as strings, and then later assigned to
# the value of the current environment.
ARGS=()

HAS_XCODE_VERSION_FLAG=false

for ARG in "$@"; do
    if [[ "$ARG" =~ \$(.*) ]]; then
      # Get the name of the make variable
      MAKEVAR=$(echo $ARG | sed 's,.*\$(\(.*\)).*,\1,g')
      # Next, parameter expansion of the variable by name
      VALUE="${!MAKEVAR}"
      REPLACED="$(echo $ARG | sed "s,\$(\(.*\)),$VALUE,g")"
      ARGS+=(${REPLACED})
    else
      ARGS+=("${ARG}")
    fi
    if [[ "$ARG" =~ "--xcode_version" ]]; then
       HAS_XCODE_VERSION_FLAG=true
    fi
done

# If we don't select an Xcode then use the default Xcode
if [[ "$1" == "build" ]] || [[ "$1" == "test" ]]; then
    if [[ ! $HAS_XCODE_VERSION_FLAG == true ]]; then
       ARGS+=("--xcode_version=$(/usr/bin/xcodebuild -version | grep Xcode | cut -d ' ' -f2)")
    fi
fi

# Exec in a subshell in order to trap
(exec -a "$BAZEL" /usr/bin/env - TERM="${TERM}" SHELL="${SHELL}" PATH="${PATH}" HOME="${HOME}" "${BAZEL}" "${ARGS[@]}")