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Execute AsciiDoc from Java using the Jython Interpreter
import java.io.*;
import javax.script.*;
import org.python.core.PySystemState;
import org.python.core.PyString;
import org.python.util.PythonInterpreter;
/**
* This class executes the AsciiDoc python scripts (asciidoc.py and a2x.py) from
* Java using the Jython interpreter.
*
* <p>The goal is to eventually use this class in
* a Maven or Gradle plugin to allow AsciiDoc to be integrated into a build.</p>
*
* <p>Ideally, we would like to use the JSR-233 APIs. However, at the time of
* writing, the Jython implementation of JSR-233 did not support passing arguments
* to the script, which is essential for using the AsciiDoc scripts.</p>
*
* Compile:
*
* javac -cp jython.jar AsciiDoc.java
*
* Usage:
*
* java -cp .:jython.jar AsciiDoc mydoc.asciidoc
* java -cp .:jython.jar AsciiDoc mydoc.asciidoc html5
* java -cp .:jython.jar AsciiDoc mydoc.asciidoc docbook
*/
public class AsciiDoc {
private static final String ASCIIDOC_INSTALL_DIR =
System.getProperty("user.home") + "/mirror/checkout/asciidoc";
public static void main(String[] args) {
if (args.length == 0) {
System.err.println("Expecting a document to process");
}
String document = args[0];
String outputFormat = "html5";
if (args.length == 2) {
outputFormat = args[1];
}
String program = "a2x.py";
if ("html5".equals(outputFormat)) {
program = "asciidoc.py";
}
File programPath = new File(ASCIIDOC_INSTALL_DIR + "/" + program);
PySystemState sys = new PySystemState();
sys.argv.clear();
sys.argv.append(new PyString(programPath.getAbsolutePath()));
if ("html5".equals(outputFormat) || "xhtml11".equals(outputFormat)) {
sys.argv.append(new PyString("-b" + outputFormat));
sys.argv.append(new PyString("-atoc2"));
sys.argv.append(new PyString("-apygments"));
// sys.argv.append(new PyString("-aicons"));
// sys.argv.append(new PyString("-adata-uri"));
// sys.argv.append(new PyString("-atheme=default"));
} else {
sys.argv.append(new PyString("-f" + outputFormat));
}
sys.argv.append(new PyString(document));
PythonInterpreter python = new PythonInterpreter(null, sys);
python.set("__file__", programPath.getAbsolutePath());
long before = System.currentTimeMillis();
python.exec(readFile(programPath));
System.out.println("Executed in " + ((System.currentTimeMillis() - before) / 1000d) + "s");
}
public static String readFile(File f) {
StringBuilder contents = new StringBuilder();
try {
BufferedReader input = new BufferedReader(new FileReader(f));
try {
String line = null;
while ((line = input.readLine()) != null) {
contents.append(line);
contents.append(System.getProperty("line.separator"));
}
} finally {
input.close();
}
} catch (IOException ex) {
ex.printStackTrace();
}
return contents.toString();
}
}
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