copy a file with permissions

git-svn-id: https://hudson.dev.java.net/svn/hudson/trunk/hudson/main@18899 71c3de6d-444a-0410-be80-ed276b4c234a

core/pom.xml

@@ -318,6 +318,11 @@ THE SOFTWARE.
       </exclusions>
     </dependency>
 
+    <dependency>
+      <groupId>org.jruby.ext.posix</groupId>
+      <artifactId>jna-posix</artifactId>
+      <version>1.0.1</version>
+    </dependency>
     <dependency>
       <groupId>org.jvnet.hudson.svnkit</groupId>
       <artifactId>svnkit</artifactId>

core/src/main/java/hudson/FilePath.java

@@ -43,6 +43,7 @@ import hudson.util.FormValidation;
 import static hudson.util.jna.GNUCLibrary.LIBC;
 import static hudson.Util.fixEmpty;
 import static hudson.FilePath.TarCompression.GZIP;
+import hudson.os.PosixAPI;
 import org.apache.tools.ant.BuildException;
 import org.apache.tools.ant.DirectoryScanner;
 import org.apache.tools.ant.Project;
@@ -938,10 +939,14 @@ public final class FilePath implements Serializable {
      *
      * On Windows, no-op.
      *
+     * @param mask
+     *      File permission mask. To simplify the permission copying,
+     *      if the parameter is -1, this method becomes no-op.
      * @since 1.303
+     * @see #mode()
      */
     public void chmod(final int mask) throws IOException, InterruptedException {
-        if(!isUnix())   return;
+        if(!isUnix() || mask==-1)   return;
         act(new FileCallable<Void>() {
             public Void invoke(File f, VirtualChannel channel) throws IOException {
                 if(LIBC.chmod(f.getAbsolutePath(),mask)!=0)
@@ -951,6 +956,23 @@ public final class FilePath implements Serializable {
         });
     }
 
+    /**
+     * Gets the file permission bit mask.
+     *
+     * @return
+     *      -1 on Windows, since such a concept doesn't make sense.
+     * @since 1.311
+     * @see #chmod(int)
+     */
+    public int mode() throws IOException, InterruptedException {
+        if(!isUnix())   return -1;
+        return act(new FileCallable<Integer>() {
+            public Integer invoke(File f, VirtualChannel channel) throws IOException {
+                return PosixAPI.get().stat(f.getPath()).mode();
+            }
+        });
+    }
+
     /**
      * List up files and directories in this directory.
      *
@@ -1186,6 +1208,16 @@ public final class FilePath implements Serializable {
         }
     }
 
+    /**
+     * Copies this file to the specified target, with file permissions intact.
+     * @since 1.311
+     */
+    public void copyToWithPermission(FilePath target) throws IOException, InterruptedException {
+        copyToWithPermission(target);
+        // copy file permission
+        target.chmod(mode());
+    }
+
     /**
      * Sends the contents of this file into the given {@link OutputStream}.
      */

core/src/main/java/hudson/os/PosixAPI.java

@@ -0,0 +1,72 @@
+package hudson.os;
+
+import org.jruby.ext.posix.POSIX;
+import org.jruby.ext.posix.POSIXFactory;
+import org.jruby.ext.posix.POSIXHandler;
+import org.jruby.ext.posix.POSIX.ERRORS;
+
+import java.io.File;
+import java.io.InputStream;
+import java.io.PrintStream;
+import java.util.logging.Logger;
+
+/**
+ * POSIX API wrapper.
+ * 
+ * @author Kohsuke Kawaguchi
+ */
+public class PosixAPI {
+    public static POSIX get() {
+        return posix;
+    }
+
+    private static final POSIX posix = POSIXFactory.getPOSIX(new POSIXHandler() {
+        public void error(ERRORS errors, String s) {
+            throw new RuntimeException(s+" "+errors);
+        }
+
+        public void unimplementedError(String s) {
+            throw new UnsupportedOperationException(s);
+        }
+
+        public void warn(WARNING_ID warning_id, String s, Object... objects) {
+            LOGGER.fine(s);
+        }
+
+        public boolean isVerbose() {
+            return false;
+        }
+
+        public File getCurrentWorkingDirectory() {
+            // TODO
+            throw new UnsupportedOperationException();
+        }
+
+        public String[] getEnv() {
+            // TODO
+            throw new UnsupportedOperationException();
+        }
+
+        public InputStream getInputStream() {
+            // TODO
+            throw new UnsupportedOperationException();
+        }
+
+        public PrintStream getOutputStream() {
+            // TODO
+            throw new UnsupportedOperationException();
+        }
+
+        public int getPID() {
+            // TODO
+            throw new UnsupportedOperationException();
+        }
+
+        public PrintStream getErrorStream() {
+            // TODO
+            throw new UnsupportedOperationException();
+        }
+    }, true);
+
+    private static final Logger LOGGER = Logger.getLogger(PosixAPI.class.getName());
+}