/**
* Save the configuration as a Git text style configuration file.
*
* <p><b>Warning:</b> Although this method uses the traditional Git file locking approach to
* protect against concurrent writes of the configuration file, it does not ensure that the file
* has not been modified since the last read, which means updates performed by other objects
* accessing the same backing file may be lost.
*
* @throws IOException the file could not be written.
*/
public void save() throws IOException {
final byte[] out;
final String text = toText();
if (utf8Bom) {
final ByteArrayOutputStream bos = new ByteArrayOutputStream();
bos.write(0xEF);
bos.write(0xBB);
bos.write(0xBF);
bos.write(text.getBytes(RawParseUtils.UTF8_CHARSET.name()));
out = bos.toByteArray();
} else {
out = Constants.encode(text);
}
final LockFile lf = new LockFile(getFile(), fs);
if (!lf.lock()) throw new LockFailedException(getFile());
try {
lf.setNeedSnapshot(true);
lf.write(out);
if (!lf.commit())
throw new IOException(MessageFormat.format(JGitText.get().cannotCommitWriteTo, getFile()));
} finally {
lf.unlock();
}
snapshot = lf.getCommitSnapshot();
hash = hash(out);
// notify the listeners
fireConfigChangedEvent();
}
/**
* Commit this change and release the lock.
*
* <p>If this method fails (returns false) the lock is still released.
*
* @return true if the commit was successful and the file contains the new data; false if the
* commit failed and the file remains with the old data.
* @throws IllegalStateException the lock is not held.
*/
public boolean commit() {
final LockFile tmp = myLock;
requireLocked(tmp);
myLock = null;
if (!tmp.commit()) return false;
snapshot = tmp.getCommitSnapshot();
if (indexChangedListener != null && !Arrays.equals(readIndexChecksum, writeIndexChecksum))
indexChangedListener.onIndexChanged(new IndexChangedEvent());
return true;
}
