Mercurial Hosting > luan

comparison core/src/luan/modules/Utils.java @ 713:a21e9594307d

Find changesets by keywords (author, files, the commit message), revision number or hash, or revset expression.
add Process handling to Utils.java
author Franklin Schmidt <fschmidt@gmail.com>
date Fri, 20 May 2016 17:03:57 -0600
parents cdc70de628b5
children e44e98fe9de8
comparison
equal deleted inserted replaced
712:20051fe2a943 713:a21e9594307d
4 import java.io.IOException; 4 import java.io.IOException;
5 import java.io.ByteArrayOutputStream; 5 import java.io.ByteArrayOutputStream;
6 import java.io.InputStream; 6 import java.io.InputStream;
7 import java.io.OutputStream; 7 import java.io.OutputStream;
8 import java.io.File; 8 import java.io.File;
9 import java.io.InputStreamReader;
9 import java.net.URL; 10 import java.net.URL;
10 import java.net.MalformedURLException; 11 import java.net.MalformedURLException;
11 import luan.LuanException; 12 import luan.LuanException;
12 import luan.LuanTable; 13 import luan.LuanTable;
13 import luan.LuanFunction; 14 import luan.LuanFunction;
146 147
147 static boolean exists(String path) { 148 static boolean exists(String path) {
148 return toFile(path)!=null || toUrl(path)!=null; 149 return toFile(path)!=null || toUrl(path)!=null;
149 } 150 }
150 */ 151 */
152
153
154
155
156 // process
157
158 public static class ProcessException extends IOException {
159 private ProcessException(String msg) {
160 super(msg);
161 }
162 }
163
164 public static void checkProcess(Process proc)
165 throws IOException
166 {
167 try {
168 proc.waitFor();
169 } catch(InterruptedException e) {
170 throw new RuntimeException(e);
171 }
172 int exitVal = proc.exitValue();
173 if( exitVal != 0 ) {
174 Reader err = new InputStreamReader(proc.getErrorStream());
175 String error = readAll(err);
176 err.close();
177 throw new ProcessException(error);
178 }
179 }
180
181 public static String getOutput(Process proc)
182 throws IOException
183 {
184 Reader in = new InputStreamReader(proc.getInputStream());
185 String s = readAll(in);
186 in.close();
187 return s;
188 }
189
190 public static String execProcess(String... cmd)
191 throws IOException
192 {
193 Process proc = Runtime.getRuntime().exec(cmd);
194 String s = getOutput(proc);
195 checkProcess(proc);
196 return s;
197 }
198
151 } 199 }