org.fife.rsta.ac.perl.PerlParser Maven / Gradle / Ivy
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/*
* 05/10/2010
*
* Copyright (C) 2010 Robert Futrell
* robert_futrell at users.sourceforge.net
* http://fifesoft.com/rsyntaxtextarea
*
* This library is distributed under a modified BSD license. See the included
* RSTALanguageSupport.License.txt file for details.
*/
package org.fife.rsta.ac.perl;
import java.io.BufferedOutputStream;
import java.io.File;
import java.io.FileOutputStream;
import java.io.IOException;
import javax.swing.text.BadLocationException;
import javax.swing.text.DefaultEditorKit;
import javax.swing.text.Element;
import org.fife.rsta.ac.IOUtil;
import org.fife.rsta.ac.OutputCollector;
import org.fife.ui.rsyntaxtextarea.RSyntaxDocument;
import org.fife.ui.rsyntaxtextarea.parser.AbstractParser;
import org.fife.ui.rsyntaxtextarea.parser.DefaultParseResult;
import org.fife.ui.rsyntaxtextarea.parser.ParseResult;
/**
* Parses Perl code in an RSyntaxTextArea.
*
* Please keep in mind that this class is a work-in-progress!
*
* @author Robert Futrell
* @version 0.6
*/
public class PerlParser extends AbstractParser {
private DefaultParseResult result;
private boolean taintModeEnabled;
private boolean warningsEnabled;
/**
* The user's requested value for PERL5LIB when parsing Perl
* code, or null to use the default.
*/
private String perl5LibOverride;
/**
* The environment to use when launching Perl to parse code, in the format
* expected by Runtime.exec(). This may be null.
*/
private String[] perlEnvironment;
/**
* The maximum amount of time to wait for Perl to finish compiling a
* source file.
*/
private static final int MAX_COMPILE_MILLIS = 10000;
/**
* Constructor.
*/
public PerlParser() {
result = new DefaultParseResult(this);
}
/**
* Creates the array of environment variables to use when running Perl to
* syntax check code, based on the user's requested PERL5LIB.
*/
private void createPerlEnvironment() {
// Default to using the same environment as parent process
perlEnvironment = null;
// See if they specified a special value for PERL5LIB
String perl5Lib = getPerl5LibOverride();
if (perl5Lib!=null) {
String[] toAdd = { "PERL5LIB", perl5Lib };
perlEnvironment = IOUtil.getEnvironmentSafely(toAdd);
}
}
/**
* Returns the value to use for PERL5LIB when parsing Perl
* code.
*
* @return The value, or null to use the system default.
* @see #setPerl5LibOverride(String)
*/
public String getPerl5LibOverride() {
return perl5LibOverride;
}
/**
* Returns whether warnings are enabled when checking syntax.
*
* @return Whether warnings are enabled.
* @see #setWarningsEnabled(boolean)
*/
public boolean getWarningsEnabled() {
return warningsEnabled;
}
/**
* Returns whether taint mode is enabled when checking syntax.
*
* @return Whether taint mode is enabled.
* @see #setTaintModeEnabled(boolean)
*/
public boolean isTaintModeEnabled() {
return taintModeEnabled;
}
/**
* {@inheritDoc}
*/
public ParseResult parse(RSyntaxDocument doc, String style) {
result.clearNotices();
int lineCount = doc.getDefaultRootElement().getElementCount();
result.setParsedLines(0, lineCount-1);
long start = System.currentTimeMillis();
try {
// Bail early if install location is misconfigured.
File dir = PerlLanguageSupport.getPerlInstallLocation();
if (dir==null) {
return result;
}
String exe = File.separatorChar=='\\' ? "bin/perl.exe" : "bin/perl";
File perl = new File(dir, exe);
if (!perl.isFile()) {
return result;
}
File tempFile = File.createTempFile("perlParser", ".tmp");
BufferedOutputStream out = new BufferedOutputStream(
new FileOutputStream(tempFile));
try {
new DefaultEditorKit().write(out, doc, 0, doc.getLength());
} catch (BadLocationException ble) {
ble.printStackTrace();
throw new IOException(ble.getMessage());
}
out.close();
String opts = "-c";
if (getWarningsEnabled()) {
opts += "w";
}
if (isTaintModeEnabled()) {
opts += "t";
}
String[] envp = perlEnvironment;
String[] cmd = { perl.getAbsolutePath(), opts, tempFile.getAbsolutePath() };
Process p = Runtime.getRuntime().exec(cmd, envp);
Element root = doc.getDefaultRootElement();
OutputCollector stdout = new OutputCollector(p.getInputStream(),
false);
Thread t = new Thread(stdout);
t.start();
PerlOutputCollector stderr = new PerlOutputCollector(
p.getErrorStream(), this, result, root);
Thread t2 = new Thread(stderr);
t2.start();
//int rc = 0;
try {
t2.join(MAX_COMPILE_MILLIS);
t.join(MAX_COMPILE_MILLIS);
if (t.isAlive()) {
t.interrupt();
//rc = -1;
}
else {
/*rc = */p.waitFor();
}
//System.out.println(rc);
} catch (InterruptedException ie) {
ie.printStackTrace();
}
long time = System.currentTimeMillis() - start;
result.setParseTime(time);
//System.out.println(time + "ms");
} catch (IOException ioe) {
result.setError(ioe);
ioe.printStackTrace();
}
return result;
}
/**
* Sets the value to use for PERL5LIB when parsing Perl
* code.
*
* @param override The value, or null to use the system
* default.
* @see #getPerl5LibOverride()
*/
public void setPerl5LibOverride(String override) {
perl5LibOverride = override;
createPerlEnvironment(); // Refresh our cached environment map.
}
/**
* Toggles whether taint mode is enabled when checking syntax.
*
* @param enabled Whether taint mode should be enabled.
* @see #isTaintModeEnabled()
*/
public void setTaintModeEnabled(boolean enabled) {
taintModeEnabled = enabled;
}
/**
* Toggles whether warnings are returned when checking syntax.
*
* @param enabled Whether warnings are enabled.
* @see #getWarningsEnabled()
*/
public void setWarningsEnabled(boolean enabled) {
warningsEnabled = enabled;
}
}