com.tpspay.postmaven.postbuild.GenerateBuildMojo Maven / Gradle / Ivy

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A maven build plugin for building Postilion nodes.

There is a newer version: 1.0.1

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package com.tpspay.postmaven.postbuild;

import java.io.BufferedReader;
import java.io.File;
import java.io.FileReader;
import java.io.FileWriter;
import java.io.IOException;
import java.util.ArrayList;
import java.util.List;

import org.apache.maven.plugin.MojoExecutionException;
import org.apache.maven.plugin.MojoFailureException;
import org.apache.maven.project.MavenProject;

/**
 * Goal to generate the build.generated.py file
 * 
 * @goal post-buildpy
 * 
 * @phase generate-sources
 * 
 * @author John Oxley <[email protected]>
 */
public class GenerateBuildMojo extends AbstractPostilionBuildMojo {
	private static final String NL = System.getProperty("line.separator");

	/**
	 * Location of the generated build.py file
	 * 
	 * @parameter default-value="build.py"
	 */
	private String buildFile;

	/**
	 * @parameter default-value="${project}"
	 * @required
	 * @readonly
	 */
	private MavenProject project;

	public static String generateClasspaths(List fileList) {
		StringBuilder sb = new StringBuilder();
		for (String file : fileList) {
			sb.append(NL);
			sb.append("\"");
			sb.append(file.replace("\\", "\\\\"));
			sb.append("\",");
		}

		return sb.toString().substring(NL.length());
	}

	public void execute() throws MojoExecutionException, MojoFailureException {
		try {
			getLog().info("Generating build.generated.py");

			String classpaths = getClasspaths();

			File orig = new File(buildFile);
			File generated = new File(buildGeneratedFile);
			if (generated.exists()) {
				getLog().info("Deleting existing " + generated.getAbsolutePath());
				generated.delete();
			}

			getLog().info("Original file: " + orig.getAbsolutePath());
			getLog().info("Generated file: " + generated.getAbsolutePath());

			BufferedReader reader = new BufferedReader(new FileReader(orig));
			FileWriter writer = new FileWriter(generated);

			String line = reader.readLine();
			while (line != null) {
				String write = line;
				if (line.contains("${postilion.dependencies}")) {
					write = classpaths;
				}
				if (line.contains("${project.version}")) {
					write = line.replace("${project.version}", project.getVersion());
				}
				writer.write(write);
				writer.write(NL);
				line = reader.readLine();
			}

			writer.close();
			reader.close();
		} catch (IOException e) {
			throw new MojoExecutionException("Problem deleting build directory", e);
		}
	}

	private String getClasspaths() {
		File dir = new File("target/dependencies");
		if (!dir.exists()) {
			return null;
		}

		File[] files = dir.listFiles();

		if (files.length == 0) {
			return null;
		}

		List fileList = new ArrayList();
		for (File f : files) {
			fileList.add(f.getPath());
		}

		return generateClasspaths(fileList);
	}
}