blob: 3feb702599160541d5475cfd292012c1d514e0a0 [file] [log] [blame]
package aQute.libg.command;
import java.io.*;
import java.util.*;
import java.util.Map.Entry;
import java.util.concurrent.*;
import aQute.libg.reporter.*;
public class Command {
boolean trace;
Reporter reporter;
List<String> arguments = new ArrayList<String>();
Map<String,String> variables = new LinkedHashMap<String,String>();
long timeout = 0;
File cwd = new File("").getAbsoluteFile();
static Timer timer = new Timer(Command.class.getName(), true);
Process process;
volatile boolean timedout;
String fullCommand;
public Command(String fullCommand) {
this.fullCommand = fullCommand;
}
public Command() {}
public int execute(Appendable stdout, Appendable stderr) throws Exception {
return execute((InputStream) null, stdout, stderr);
}
public int execute(String input, Appendable stdout, Appendable stderr) throws Exception {
InputStream in = new ByteArrayInputStream(input.getBytes("UTF-8"));
return execute(in, stdout, stderr);
}
public int execute(InputStream in, Appendable stdout, Appendable stderr) throws Exception {
if (reporter != null) {
reporter.trace("executing cmd: %s", arguments);
}
String args[] = arguments.toArray(new String[arguments.size()]);
String vars[] = new String[variables.size()];
int i = 0;
for (Entry<String,String> s : variables.entrySet()) {
vars[i++] = s.getKey() + "=" + s.getValue();
}
if (fullCommand == null)
process = Runtime.getRuntime().exec(args, vars.length == 0 ? null : vars, cwd);
else
process = Runtime.getRuntime().exec(fullCommand, vars.length == 0 ? null : vars, cwd);
// Make sure the command will not linger when we go
Runnable r = new Runnable() {
public void run() {
process.destroy();
}
};
Thread hook = new Thread(r, arguments.toString());
Runtime.getRuntime().addShutdownHook(hook);
TimerTask timer = null;
OutputStream stdin = process.getOutputStream();
if (timeout != 0) {
timer = new TimerTask() {
public void run() {
timedout = true;
process.destroy();
}
};
Command.timer.schedule(timer, timeout);
}
InputStream out = process.getInputStream();
try {
InputStream err = process.getErrorStream();
try {
Collector cout = new Collector(out, stdout);
cout.start();
Collector cerr = new Collector(err, stderr);
cerr.start();
try {
int c = in.read();
while (c >= 0) {
stdin.write(c);
if (c == '\n')
stdin.flush();
c = in.read();
}
}
catch (InterruptedIOException e) {
// Ignore here
}
catch (Exception e) {
// Who cares?
}
finally {
stdin.close();
}
if (reporter != null)
reporter.trace("exited process");
cerr.join();
cout.join();
if (reporter != null)
reporter.trace("stdout/stderr streams have finished");
}
finally {
err.close();
}
}
finally {
out.close();
if (timer != null)
timer.cancel();
Runtime.getRuntime().removeShutdownHook(hook);
}
byte exitValue = (byte) process.waitFor();
if (reporter != null)
reporter.trace("cmd %s executed with result=%d, result: %s/%s, timedout=%s", arguments, exitValue, stdout,
stderr, timedout);
if (timedout)
return Integer.MIN_VALUE;
return exitValue;
}
public void add(String... args) {
for (String arg : args)
arguments.add(arg);
}
public void addAll(Collection<String> args) {
arguments.addAll(args);
}
public void setTimeout(long duration, TimeUnit unit) {
timeout = unit.toMillis(duration);
}
public void setTrace() {
this.trace = true;
}
public void setReporter(Reporter reporter) {
this.reporter = reporter;
}
public void setCwd(File dir) {
if (!dir.isDirectory())
throw new IllegalArgumentException("Working directory must be a directory: " + dir);
this.cwd = dir;
}
public void cancel() {
process.destroy();
}
class Collector extends Thread {
final InputStream in;
final Appendable sb;
Collector(InputStream inputStream, Appendable sb) {
this.in = inputStream;
this.sb = sb;
setDaemon(true);
}
public void run() {
try {
int c = in.read();
while (c >= 0) {
sb.append((char) c);
c = in.read();
}
}
catch (IOException e) {
// We assume the socket is closed
}
catch (Exception e) {
try {
sb.append("\n**************************************\n");
sb.append(e.toString());
sb.append("\n**************************************\n");
}
catch (IOException e1) {}
if (reporter != null) {
reporter.trace("cmd exec: %s", e);
}
}
}
}
public Command var(String name, String value) {
variables.put(name, value);
return this;
}
public Command arg(String... args) {
add(args);
return this;
}
public Command full(String full) {
fullCommand = full;
return this;
}
public void inherit() {
ProcessBuilder pb = new ProcessBuilder();
for (Entry<String,String> e : pb.environment().entrySet()) {
var(e.getKey(), e.getValue());
}
}
public String var(String name) {
return variables.get(name);
}
public String toString() {
StringBuilder sb = new StringBuilder();
String del = "";
for (String argument : arguments) {
sb.append(del);
sb.append(argument);
del = " ";
}
return sb.toString();
}
}