Hi All,
Attached is a simple link task which allows you to create unix
links from ant build files. It supports both hard and symbolic links.
I'm definitely an ant beginner - so please feel free to point out any
mistakes. I want to learn the right way to do things.
Couple of questions - how do we handle platform specific tasks like
this ? (ie. is it acceptable for general consumption ?, core or
optional, or neither ?).
I'm intending to add support for target directories as well.
ie. ln TARGET-0...[TARGET-N] DIRECTORY
and the option of removing existing destination files, if people would
find that useful ?
Any implementation ideas for non UNIX platforms ??
Cheers,
Marcus
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/*
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package org.apache.tools.ant.taskdefs;
import java.io.*;
import org.apache.tools.ant.*;
import org.apache.tools.ant.types.Commandline;
/**
* Task to create a link (optionally symbolic) from one file to another.
*
* @author [EMAIL PROTECTED]
*/
public class Link extends Task {
public void setFile(File src) {
this.src = src;
}
public void setToFile(File dest) {
this.dest = dest;
}
public void setSymbolic(boolean symbolic) {
this.symbolic = symbolic;
}
public void execute() throws BuildException {
if (src == null || !src.exists()) {
throw new BuildException(
"The file attribute must be present, and name an existing file",
location
);
}
if (dest == null || dest.exists()) {
throw new BuildException(
"The toFile attribute must be present, and not name an " +
"existing file", location
);
}
if (src.equals(dest)) {
throw new BuildException(
"Source filename cannot be the destination filename.", location
);
}
log("Linking " + src + (symbolic ? ", symbolically" : "") +
" to " + dest, Project.MSG_INFO
);
linkFile(src, dest, symbolic);
}
private void linkFile(File from, File to, boolean symbolic)
throws BuildException {
Commandline link = new Commandline();
link.setExecutable("ln");
if (symbolic)
link.createArgument().setValue("-s");
link.createArgument().setFile(from);
link.createArgument().setFile(to);
Execute ex =
new Execute(
new LogStreamHandler(
this, Project.MSG_INFO, Project.MSG_WARN
), null
);
ex.setCommandline(link.getCommandline());
try {
ex.execute();
} catch (IOException e) {
throw new BuildException(e);
}
}
private File src;
private File dest;
private boolean symbolic = true;
}
