info.freelibrary.maven.LLP2JLPMojo Maven / Gradle / Ivy

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package info.freelibrary.maven;

import org.apache.maven.plugins.annotations.Component;

import org.apache.maven.plugins.annotations.LifecyclePhase;
import org.apache.maven.plugins.annotations.Mojo;

import org.apache.maven.plugin.logging.Log;
import org.apache.maven.plugin.AbstractMojo;
import org.apache.maven.plugin.MojoExecutionException;

import org.apache.maven.model.Profile;

import org.apache.maven.project.MavenProject;

import info.freelibrary.util.FileUtils;
import info.freelibrary.util.StringUtils;

import java.io.File;
import java.io.IOException;

import java.util.List;
import java.util.Properties;

/**
 * Goal which copies native files from the LD_LIBRARY_PATH to the
 * java.library.path.
 */
@Mojo(name = "copy", defaultPhase = LifecyclePhase.GENERATE_RESOURCES)
public class LLP2JLPMojo extends AbstractMojo {

    /**
     * A string possible used in the LD_LIBRARY_PATH variable declaration.
     */
    private static String BASEDIR_PROPERTY = "${project.basedir}";

    /**
     * The Maven project from which this plugin is being run.
     */
    @Component
    private MavenProject myProject;

    /**
     * Executes the LLP2JLP-Maven-Plugin, copying the files from the file system
     * represented by the ${LD_LIBRARY_PATH} variable to the file system
     * represented by the ${java.library.path} variable. These should be defined
     * in a Maven profile, in the case of the LD_LIBRARY_PATH, and the
     * ${MAVEN_OPTS} variable, in the case of the java.library.path.
     */
    public void execute() throws MojoExecutionException {
        String jlp = System.getProperty("java.library.path");
        Log log = getLog();

        List profiles = myProject.getActiveProfiles();

        for (int index = 0; index < profiles.size(); index++) {
            Profile profile = (Profile) profiles.get(index);
            Properties properties = profile.getProperties();
            String llp = properties.getProperty("LD_LIBRARY_PATH");

            // If that's not found, perhaps this is a Mac build?
            if (llp == null) {
                llp = properties.getProperty("DYLD_LIBRARY_PATH");
            }

            if (llp == null) {
                continue; // this isn't a project specific profile
            }

            if (jlp != null && !jlp.contains(":")) {
                File jlpDir = new File(jlp);
                File llpDir;

                if (llp.startsWith(BASEDIR_PROPERTY)) {
                    llp = llp.substring(BASEDIR_PROPERTY.length());
                    llpDir = new File(myProject.getBasedir(), llp);
                } else {
                    if (log.isDebugEnabled()) {
                        log.debug(llp + " wasn't a basedir path");
                    }

                    llpDir = new File(llp);
                }

                if (log.isInfoEnabled()) {
                    log.info(StringUtils.formatMessage(
                            "Copying files from {} to {}", new String[] {
                                    llpDir.getAbsolutePath(),
                                    jlpDir.getAbsolutePath()}));

                }

                try {
                    FileUtils.copy(llpDir, jlpDir);
                } catch (IOException details) {
                    throw new MojoExecutionException("Couldn't copy files",
                            details);
                }
            } else {
                throw new MojoExecutionException(
                        "java.library.path should be set in MAVEN_OPTS");
            }
        }
    }
}