org.ajoberstar.grgit.operation.ApplyOp.groovy Maven / Gradle / Ivy

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The Groovy way to use Git.

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/*
 * Copyright 2012-2015 the original author or authors.
 *
 * 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.ajoberstar.grgit.operation

import java.util.concurrent.Callable

import org.ajoberstar.grgit.Repository
import org.ajoberstar.grgit.exception.GrgitException
import org.ajoberstar.grgit.util.CoercionUtil

import org.eclipse.jgit.api.ApplyCommand
import org.eclipse.jgit.api.errors.GitAPIException

/**
 * Apply a patch to the index.
 *
 * To apply a patch to the index.
 *
 *  * grgit.apply(path: patchFile)
 * 
 *
 * See git-apply Manual Page.
 *
 * @since 0.1.0
 * @see git-apply Manual Page
 */
class ApplyOp implements Callable {
	private final Repository repo

	/**
	 * The patch file to apply to the index.
	 * @see {@link CoercionUtil#toFile(Object)}
	 */
	Object patch

	ApplyOp(Repository repo) {
		this.repo = repo
	}

	Void call() {
		ApplyCommand cmd = repo.jgit.apply()
		if (!patch) {
			throw new IllegalStateException('Must set a patch file.')
		}
		CoercionUtil.toFile(patch).withInputStream { stream ->
			cmd.patch = stream
			try {
				cmd.call()
				return null
			} catch (GitAPIException e) {
				throw new GrgitException('Problem applying patch.', e)
			}
		}
	}
}