/*
 * Copyright 2010-2017 JetBrains s.r.o.
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 * http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

package org.jetbrains.kotlin.jps.build

inline fun withSystemProperty(property: String, newValue: String?, fn: ()->Unit) {
    val backup = System.getProperty(property)
    setOrClearSysProperty(property, newValue)

    try {
        fn()
    }
    finally {
        setOrClearSysProperty(property, backup)
    }
}


@Suppress("NOTHING_TO_INLINE")
inline fun setOrClearSysProperty(property: String, newValue: String?) {
    if (newValue != null) {
        System.setProperty(property, newValue)
    }
    else {
        System.clearProperty(property)
    }
}