/**
* Attempt to add an extension to install into this instance.
*
* @param extensionToInstall
* @throws IOException
*/
public void addExtension(File extensionToInstall) throws IOException {
if (!extensionToInstall.isDirectory()
&& !FileHandler.isZipped(extensionToInstall.getAbsolutePath())) {
throw new IOException("Can only install from a zip file, an XPI or a directory");
}
File root = obtainRootDirectory(extensionToInstall);
String id = readIdFromInstallRdf(root);
File extensionDirectory = new File(extensionsDir, id);
if (extensionDirectory.exists() && !FileHandler.delete(extensionDirectory)) {
throw new IOException("Unable to delete existing extension directory: " + extensionDirectory);
}
FileHandler.createDir(extensionDirectory);
FileHandler.makeWritable(extensionDirectory);
FileHandler.copyDir(root, extensionDirectory);
}
