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/*
* Copyright (C) 2020 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.commands.incident;
import android.util.Log;
import com.android.commands.incident.sections.PersistLogSection;
import java.io.PrintStream;
import java.util.ArrayList;
import java.util.Arrays;
import java.util.Collections;
import java.util.List;
import java.util.ListIterator;
/**
* Helper command runner for incidentd to run customized command to gather data for a non-standard
* section.
*/
public class IncidentHelper {
private static final String TAG = "IncidentHelper";
private static boolean sLog = false;
private final List<String> mArgs;
private ListIterator<String> mArgsIterator;
private IncidentHelper(String[] args) {
mArgs = Collections.unmodifiableList(Arrays.asList(args));
mArgsIterator = mArgs.listIterator();
}
private static void showUsage(PrintStream out) {
out.println("This command is not designed to be run manually.");
out.println("Usage:");
out.println(" run [sectionName]");
}
private void run(String[] args) throws ExecutionException {
Section section = null;
List<String> sectionArgs = new ArrayList<>();
while (mArgsIterator.hasNext()) {
String arg = mArgsIterator.next();
if ("-l".equals(arg)) {
sLog = true;
Log.i(TAG, "Args: [" + String.join(",", args) + "]");
} else if ("run".equals(arg)) {
section = getSection(nextArgRequired());
mArgsIterator.forEachRemaining(sectionArgs::add);
break;
} else {
log(Log.WARN, TAG, "Error: Unknown argument: " + arg);
return;
}
}
section.run(System.in, System.out, sectionArgs);
}
private static Section getSection(String name) throws IllegalArgumentException {
if ("persisted_logs".equals(name)) {
return new PersistLogSection();
}
throw new IllegalArgumentException("Section not found: " + name);
}
private String nextArgRequired() {
if (!mArgsIterator.hasNext()) {
throw new IllegalArgumentException(
"Arg required after \"" + mArgs.get(mArgsIterator.previousIndex()) + "\"");
}
return mArgsIterator.next();
}
/**
* Print the given message to stderr, also log it if asked to (set by -l cmd arg).
*/
public static void log(int priority, String tag, String msg) {
System.err.println(tag + ": " + msg);
if (sLog) {
Log.println(priority, tag, msg);
}
}
/**
* Command-line entry point.
*
* @param args The command-line arguments
*/
public static void main(String[] args) {
if (args.length == 0) {
showUsage(System.err);
System.exit(0);
}
IncidentHelper incidentHelper = new IncidentHelper(args);
try {
incidentHelper.run(args);
} catch (IllegalArgumentException e) {
showUsage(System.err);
System.err.println();
e.printStackTrace(System.err);
if (sLog) {
Log.e(TAG, "Error: ", e);
}
} catch (Exception e) {
e.printStackTrace(System.err);
if (sLog) {
Log.e(TAG, "Error: ", e);
}
System.exit(1);
}
}
}
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