Create or update the Manifest when used as a task.
if (manifestFile == null) {
throw new BuildException("the file attribute is required");
}
Manifest toWrite = Manifest.getDefaultManifest();
Manifest current = null;
BuildException error = null;
if (manifestFile.exists()) {
FileInputStream fis = null;
InputStreamReader isr = null;
try {
fis = new FileInputStream(manifestFile);
if (encoding == null) {
isr = new InputStreamReader(fis, "UTF-8");
} else {
isr = new InputStreamReader(fis, encoding);
}
current = new Manifest(isr);
} catch (ManifestException m) {
error = new BuildException("Existing manifest " + manifestFile
+ " is invalid", m, getLocation());
} catch (IOException e) {
error = new BuildException("Failed to read " + manifestFile,
e, getLocation());
} finally {
FileUtils.close(isr);
}
}
//look for and print warnings
for (Enumeration e = nestedManifest.getWarnings();
e.hasMoreElements();) {
log("Manifest warning: " + (String) e.nextElement(),
Project.MSG_WARN);
}
try {
if (mode.getValue().equals("update") && manifestFile.exists()) {
if (current != null) {
toWrite.merge(current);
} else if (error != null) {
throw error;
}
}
toWrite.merge(nestedManifest);
} catch (ManifestException m) {
throw new BuildException("Manifest is invalid", m, getLocation());
}
if (toWrite.equals(current)) {
log("Manifest has not changed, do not recreate",
Project.MSG_VERBOSE);
return;
}
PrintWriter w = null;
try {
FileOutputStream fos = new FileOutputStream(manifestFile);
OutputStreamWriter osw = new OutputStreamWriter(fos, Manifest.JAR_ENCODING);
w = new PrintWriter(osw);
toWrite.write(w);
} catch (IOException e) {
throw new BuildException("Failed to write " + manifestFile,
e, getLocation());
} finally {
if (w != null) {
w.close();
}
}
