Update the import script

Author: aciidgh

README.md

@@ -7,8 +7,8 @@ and [llbuild](https://github.com/apple/swift-llbuild).
 Development
 -------------
 
-All changes to source files in this repository need to be done in the repository of the Swift Package Manager repository ([link](https://github.com/apple/swift-package-manager)) and then copied here using the Script in `Utilities/import` which takes the local path to the SwiftPM directory as input (or uses `../swiftpm` as default).
-All targets with a TSC prefix in [SwiftPM](https://github.com/apple/swift-package-manager) are part of the swift-tools-support-core and will be imported by the import script. The plan is to eventually move ownership to this repository.
+All changes to source files in this repository need to be done in the repository of the Swift Package Manager repository ([link](https://github.com/apple/swift-package-manager)) and then copied here using the Script in `Utilities/import` which looks for SwiftPM next to its own checkout (`../swiftpm`).
+All files under the TSC directory in [SwiftPM](https://github.com/apple/swift-package-manager) are part of the swift-tools-support-core and will be imported by the import script. The plan is to eventually move ownership to this repository.
 
 License
 -------

Utilities/import

@@ -1,4 +1,6 @@
-#!/bin/sh
+#!/usr/bin/env bash
+
+set -eu
 
 # This source file is part of the Swift.org open source project
 #
@@ -7,92 +9,13 @@
 #
 # See http://swift.org/LICENSE.txt for license information
 # See http://swift.org/CONTRIBUTORS.txt for Swift project authors
-#
-# -------------------------------------------------------------------------
-# This script is used to bootstrap the tools-support-core package from its
-# sources in the Swift Package Manager repository.
-#
-# It does so by copying the sources of its targets from the directory that gets
-# specified as the directory that contains the Swift package manager.
-#
-# See below for a list of all directories that get copied.
-
-EXEC_PATH=$0
-EXEC_DIR_NAME=`dirname $EXEC_PATH`
-TSC_PACKAGE_DIR=$EXEC_DIR_NAME/..
-
-TSC_TARGETS=(
-	TSCclibc
-	TSCBasic
-	TSCLibc
-	TSCTestSupport
-	TSCTestSupportExecutable
-	TSCUtility
-)
-
-TSC_TEST_TARGETS=(
-	TSCBasicPerformanceTests
-	TSCBasicTests
-	TSCTestSupportTests
-	TSCUtilityTests
-)
-
-function copySources {
-	local DIR=$1
-	shift
-	local SUB_DIR=$1
-	shift
-	local TARGETS=("$@")
-
-	# create the sub directory - don't mind if it exists already
-	mkdir $SUB_DIR &> /dev/null
-
-	ALL_EXIST=1
-	for TARGET in "${TARGETS[@]}"
-	do
-		SRC_DIR_PATH=$DIR/$SUB_DIR/$TARGET
-		if [ ! -d $SRC_DIR_PATH ]; then
-			echo "$SRC_DIR_PATH does not exist"
-			ALL_EXIST=0
-		fi
-	done
-
-	if [ $ALL_EXIST -ne 1 ]; then
-		echo "Aborting."
-		exit -1
-	fi
-
-	ALL_COPIED=1
-	for TARGET in "${TARGETS[@]}"
-	do
-		SRC_DIR_PATH=$DIR/$SUB_DIR/$TARGET
-		DST_DIR_PATH=$TSC_PACKAGE_DIR/$SUB_DIR/$TARGET
-		rm -rf $DST_DIR_PATH
-		cp -r $SRC_DIR_PATH $DST_DIR_PATH
-		if [ $? -ne 0 ]; then
-			echo "Couldn't copy $SRC_DIR_PATH to $DST_DIR_PATH."
-			ALL_COPIED=0
-		fi
-	done
 
-	if [ $ALL_COPIED -ne 1 ]; then
-		echo "Aborting."
-		exit -1
-	fi	
-}
+__dir="$(cd "$(dirname "${BASH_SOURCE[0]}")" && pwd)"
 
-SWIFTPM_DIR="${1:-../swiftpm}"
+SRCROOT="`cd "${__dir}/..";pwd`"
+echo "SRCROOT is $SRCROOT"
 
-echo "Copying ${TSC_TARGETS[@]} from $SWIFTPM_DIR to $TSC_PACKAGE_DIR"
-copySources $SWIFTPM_DIR "Sources" "${TSC_TARGETS[@]}"
-echo "Done!"
-echo "Copying ${TSC_TEST_TARGETS[@]} from $SWIFTPM_DIR to $TSC_PACKAGE_DIR"
-copySources $SWIFTPM_DIR "Tests" "${TSC_TEST_TARGETS[@]}"
-echo "Done!"
+IMPORT_DIR="`cd "${SRCROOT}/../swiftpm/TSC";pwd`"
 
-if [ -x "$(command -v swift)" ]; then
-	echo "Found 'swift' at `which swift`. Generating Linux main for unit tests."
-	swift test --generate-linuxmain
-else
-	echo "Didn't find 'swift' and will skip generating linux main for unit tests."
-fi
+echo Copying from $IMPORT_DIR
+cp -r ${IMPORT_DIR}/* $SRCROOT