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/*
* Copyright (C) 2018 The Android Open Source Project
*
* 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 com.android.tradefed.device.cloud;
import java.io.File;
import java.util.ArrayList;
import java.util.List;
/** Utility class to format commands to reach a remote gce device. */
public class GceRemoteCmdFormatter {
/**
* SCP can be used to push or pull file depending of the structure of the args. Ensure we can
* support both.
*/
public enum ScpMode {
PUSH,
PULL;
}
/**
* Utility to create a ssh command for a gce device based on some parameters.
*
* @param sshKey the ssh key {@link File}.
* @param extraOptions a List of {@link String} that can be added for extra ssh options. can be
* null.
* @param hostName the hostname where to connect to the gce device.
* @param command the actual command to run on the gce device.
* @return a list representing the ssh command for a gce device.
*/
public static List<String> getSshCommand(
File sshKey,
List<String> extraOptions,
String user,
String hostName,
String... command) {
List<String> cmd = new ArrayList<>();
cmd.add("ssh");
cmd.add("-o");
cmd.add("LogLevel=ERROR");
cmd.add("-o");
cmd.add("UserKnownHostsFile=/dev/null");
cmd.add("-o");
cmd.add("StrictHostKeyChecking=no");
cmd.add("-o");
cmd.add("ServerAliveInterval=10");
cmd.add("-i");
cmd.add(sshKey.getAbsolutePath());
if (extraOptions != null) {
for (String op : extraOptions) {
cmd.add(op);
}
}
cmd.add(user + "@" + hostName);
for (String cmdOption : command) {
cmd.add(cmdOption);
}
return cmd;
}
/**
* Utility to create a scp command to fetch a file from a remote gce device.
*
* @param sshKey the ssh key {@link File}.
* @param extraOptions a List of {@link String} that can be added for extra ssh options. can be
* null.
* @param hostName the hostname where to connect to the gce device.
* @param remoteFile the file to be fetched on the remote gce device.
* @param localFile the local file where to put the remote file.
* @param mode whether we are pushing the local file to the remote or pulling the remote
* @return a list representing the scp command for a gce device.
*/
public static List<String> getScpCommand(
File sshKey,
List<String> extraOptions,
String user,
String hostName,
String remoteFile,
String localFile,
ScpMode mode) {
List<String> cmd = new ArrayList<>();
cmd.add("scp");
cmd.add("-o");
cmd.add("LogLevel=ERROR");
cmd.add("-o");
cmd.add("UserKnownHostsFile=/dev/null");
cmd.add("-o");
cmd.add("StrictHostKeyChecking=no");
cmd.add("-o");
cmd.add("ServerAliveInterval=10");
cmd.add("-i");
cmd.add(sshKey.getAbsolutePath());
if (extraOptions != null) {
for (String op : extraOptions) {
cmd.add(op);
}
}
if (ScpMode.PULL.equals(mode)) {
cmd.add(String.format("%s@%s:%s", user, hostName, remoteFile));
cmd.add(localFile);
} else {
cmd.add(localFile);
cmd.add(String.format("%s@%s:%s", user, hostName, remoteFile));
}
return cmd;
}
}
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