com.redhat.ceylon.cmr.maven.MavenUtils Maven / Gradle / Ivy

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package com.redhat.ceylon.cmr.maven;

import java.io.File;
import java.io.FileInputStream;
import java.io.IOException;
import java.io.InputStream;
import java.util.HashSet;
import java.util.Set;

import javax.xml.parsers.DocumentBuilder;
import javax.xml.parsers.DocumentBuilderFactory;
import javax.xml.parsers.ParserConfigurationException;

import org.w3c.dom.Document;
import org.w3c.dom.Element;
import org.w3c.dom.Node;
import org.w3c.dom.NodeList;
import org.xml.sax.SAXException;

import com.redhat.ceylon.cmr.api.ModuleDependencyInfo;
import com.redhat.ceylon.cmr.api.ModuleInfo;
import com.redhat.ceylon.common.Backends;
import com.redhat.ceylon.model.cmr.ModuleScope;

/**
 * Utility class which does not depend on anything Aether (optional dep), so can be safely public
 *
 * @author Stéphane Épardaud 
 */
public class MavenUtils {
    
    public static String getDefaultMavenSettings() {
        String path = System.getProperty("maven.repo.local");
        if (path != null) {
            File file = new File(path, "settings.xml");
            if (file.exists())
                return file.getAbsolutePath();
        }

        path = System.getProperty("user.home");
        if (path != null) {
            File file = new File(path, ".m2/settings.xml");
            if (file.exists())
                return file.getAbsolutePath();
        }

        path = System.getenv("M2_HOME");
        if (path != null) {
            File file = new File(path, "conf/settings.xml");
            if (file.exists())
                return file.getAbsolutePath();
        }

        return "classpath:settings.xml";
    }

    public static ModuleInfo getDependencies(File file, String name, String version) throws IOException {
        try(InputStream is = new FileInputStream(file)){
            return getDependencies(is, name, version);
        }
    }

    public static ModuleInfo getDependencies(InputStream stream, String name, String version) throws IOException {
        Document doc;
        try {
            DocumentBuilderFactory dbFactory = DocumentBuilderFactory.newInstance();
            DocumentBuilder dBuilder = dbFactory.newDocumentBuilder();
            doc = dBuilder.parse(stream);
        } catch (ParserConfigurationException e) {
            throw new IOException(e);
        } catch (SAXException e) {
            throw new IOException(e);
        }
        doc.getDocumentElement().normalize();
        Element root = doc.getDocumentElement();
        String modGroupId = getText(root, "groupId");
        // can be null, inherited from parent
        if(modGroupId == null){
            Element parent = getFirstElement(root, "parent");
            if(parent != null)
                modGroupId = getText(parent, "groupId");
        }
        String modArtifactId = getText(root, "artifactId");
        String modVersion = getText(root, "version");
        String modName = modGroupId + ":" + modArtifactId;
        if(name != null && !name.equals(modName))
            return null;
        if(version != null && !version.equals(modVersion))
            return null;
        Element deps = getFirstElement(root, "dependencies");
        Set ret = new HashSet<>();
        if(deps != null){
            NodeList depList = deps.getElementsByTagName("dependency");
            if(depList != null){
                for(int i=0;i 0)
                    builder.append("\n");
                builder.append(desc);
            }
        }
    }
}