sitedocs-extras/tycho-version-bump-plugin/target/maven-plugin-plugin-sources/org.eclipse.tycho/tycho-core/1.5.1-20191024.160441-1/sources/org/eclipse/tycho/core/osgitools/targetplatform/EclipseInstallationLayout.java - www.eclipse.org/tycho - Git at Google

 /*******************************************************************************
  * Copyright (c) 2008, 2011 Sonatype Inc. and others.
  * All rights reserved. This program and the accompanying materials
  * are made available under the terms of the Eclipse Public License v1.0
  * which accompanies this distribution, and is available at
  * http://www.eclipse.org/legal/epl-v10.html
  *
  * Contributors:
  *    Sonatype Inc. - initial API and implementation
  *******************************************************************************/
 package org.eclipse.tycho.core.osgitools.targetplatform;

 import java.io.BufferedReader;
 import java.io.File;
 import java.io.FileFilter;
 import java.io.FileInputStream;
 import java.io.FileReader;
 import java.io.IOException;
 import java.io.InputStream;
 import java.io.InputStreamReader;
 import java.util.ArrayList;
 import java.util.Arrays;
 import java.util.LinkedHashSet;
 import java.util.List;
 import java.util.Properties;
 import java.util.Set;
 import java.util.StringTokenizer;

 import org.codehaus.plexus.component.annotations.Component;
 import org.codehaus.plexus.logging.AbstractLogEnabled;
 import org.codehaus.plexus.util.xml.XmlStreamReader;
 import org.codehaus.plexus.util.xml.Xpp3Dom;
 import org.codehaus.plexus.util.xml.Xpp3DomBuilder;

 /**
  * Finds bundles in Eclipse installation.
  *
  * See http://wiki.eclipse.org/Equinox_p2_Getting_Started See
  * http://mea-bloga.blogspot.com/2008/04/new-target-platform-preference.html
  *
  * @author igor
  *
  */

 @Component(role = EclipseInstallationLayout.class, instantiationStrategy = "per-lookup")
 public class EclipseInstallationLayout extends AbstractLogEnabled {

     private static final class FEATURE_FILTER implements FileFilter {
         @Override
         public boolean accept(File pathname) {
             if (pathname.getName().startsWith(".")) {
                 // filter out all dot files (like .svn or .DS_Store).
                 return false;
             }
             return pathname.isDirectory() || pathname.getName().endsWith(".jar");
         }
     }

     public static final String PLUGINS = "plugins";
     public static final String FEATURES = "features";

     private File location;
     private File dropinsLocation;

     public void setLocation(File location) {
         this.location = location;
         this.dropinsLocation = new File(location, "dropins");
     }

     public File getLocation() {
         return location;
     }

     public Set<File> getFeatures(File site) {
         Set<File> result = new LinkedHashSet<>();
         File[] features = new File(site, FEATURES).listFiles(new FEATURE_FILTER());
         if (features != null) {
             result.addAll(Arrays.asList(features));
         }

         return result;
     }

     public Set<File> getInstalledPlugins() {
         Set<File> result = new LinkedHashSet<>();
         try {
             result.addAll(readBundlesTxt(location));
         } catch (IOException e) {
             getLogger().warn("Exception reading P2 bundles list", e);
         }
         return result;
     }

     public Set<File> getPlugins(File site) {
         Set<File> result = new LinkedHashSet<>();

         addPlugins(result, new File(site, PLUGINS).listFiles());

         // check for bundles in the root of dropins directory
         if (dropinsLocation.equals(site)) {
             addPlugins(result, site.listFiles());
         }

         return result;
     }

     private void addPlugins(Set<File> result, File[] plugins) {
         if (plugins != null) {
             for (File plugin : plugins) {
                 if (plugin.isDirectory() && isDirectoryPlugin(plugin)) {
                     result.add(plugin);
                 } else if (plugin.isFile() && plugin.getName().endsWith(".jar")) {
                     result.add(plugin);
                 }
             }
         }
     }

     private boolean isDirectoryPlugin(File plugin) {
         return new File(plugin, "META-INF/MANIFEST.MF").canRead();
     }

     public Set<File> getSites() {
         Set<File> result = new LinkedHashSet<>();

         if (location == null) {
             return result;
         }

         if (new File(location, PLUGINS).isDirectory()) {
             result.add(location);
         }

         File platform = new File(location, "configuration/org.eclipse.update/platform.xml");
         if (platform.canRead()) {
             try {
                 try (FileInputStream is = new FileInputStream(platform)) {
                     XmlStreamReader reader = new XmlStreamReader(is);
                     Xpp3Dom dom = Xpp3DomBuilder.build(reader);
                     Xpp3Dom[] sites = dom.getChildren("site");
                     for (Xpp3Dom site : sites) {
                         String enabled = site.getAttribute("enabled");
                         if (enabled == null || Boolean.parseBoolean(enabled)) {
                             File dir = parsePlatformURL(location, site.getAttribute("url"));
                             if (dir != null) {
                                 result.add(dir);
                             }
                         }
                     }
                 }
             } catch (Exception e) {
                 getLogger().warn("Exception parsing " + toString(platform), e);
             }
         }

         addLinks(result, location, new File(location, "links"));

         // deal with dropins folder
         result.add(dropinsLocation);

         File[] dropinsFiles = dropinsLocation.listFiles();
         if (dropinsFiles != null) {
             for (File dropinsFile : dropinsFiles) {
                 File plugins = new File(dropinsFile, PLUGINS);
                 if (plugins.isDirectory()) {
                     result.add(plugins.getParentFile());
                     continue;
                 }
                 plugins = new File(dropinsFile, "eclipse/plugins");
                 if (plugins.isDirectory()) {
                     result.add(plugins.getParentFile());
                 }
             }
         }

         addLinks(result, location, dropinsLocation);

         return result;
     }

     private String toString(File file) {
         return file.getAbsolutePath();
     }

     private void addLinks(Set<File> result, File targetPlatform, File linksFolder) {
         File[] links = linksFolder.listFiles();
         if (links != null) {
             for (File link : links) {
                 if (link.isFile() && link.canRead() && link.getName().endsWith(".link")) {
                     Properties props = new Properties();
                     try {
                         try (InputStream is = new FileInputStream(link)) {
                             props.load(is);
                         }
                         String path = props.getProperty("path");
                         if (path != null) {
                             File dir = new File(path);
                             if (!dir.isAbsolute() && targetPlatform.getParentFile() != null) {
                                 dir = new File(targetPlatform.getParentFile(), path);
                             }
                             dir = dir.getAbsoluteFile();
                             if (dir.isDirectory()) {
                                 result.add(dir);
                             }
                         }
                     } catch (Exception e) {
                         getLogger().warn("Exception parsing " + toString(link), e);
                         continue;
                     }
                 }
             }
         }
     }

     private static final String PLATFORM_BASE_PREFIX = "platform:/base/";
     private static final String FILE_PREFIX = "file:";

     private File parsePlatformURL(File platformBase, String url) {
         if (url == null) {
             return null;
         }

         url = url.replace('\\', '/');

         String relPath = null;
         if (url.startsWith(PLATFORM_BASE_PREFIX)) {
             relPath = url.substring(PLATFORM_BASE_PREFIX.length());
         } else if (url.startsWith(FILE_PREFIX)) {
             relPath = url.substring(FILE_PREFIX.length());
         }

         if (relPath == null) {
             return null;
         }

         if (relPath.length() > 0 && relPath.charAt(0) == '/') {
             return new File(relPath);
         }

         return new File(platformBase, relPath);
     }

     private List<File> readBundlesTxt(File platformBase) throws IOException {
         getLogger().debug("Reading P2 bundles list");

         // there is no way to find location of bundle pool without access to P2 profile
         // so lets assume equinox.launcher comes from the pool
         File eclipseIni = new File(platformBase, "eclipse.ini");
         File pool = platformBase;
         if (eclipseIni.isFile() && eclipseIni.canRead()) {
             try (BufferedReader in = new BufferedReader(new FileReader(eclipseIni))) {
                 String str = null;
                 while ((str = in.readLine()) != null) {
                     if ("-startup".equals(str.trim())) {
                         str = in.readLine();
                         if (str != null) {
                             File file = new File(str);
                             if (!file.isAbsolute()) {
                                 file = new File(platformBase, str).getAbsoluteFile();
                             }
                             pool = file.getParentFile().getParentFile().getAbsoluteFile();
                         }
                         break;
                     }
                 }
             }
         }

         getLogger().debug("Bundle pool location " + toString(pool));

         File bundlesInfo = new File(platformBase, "configuration/org.eclipse.equinox.simpleconfigurator/bundles.info");
         if (!bundlesInfo.isFile() || !bundlesInfo.canRead()) {
             getLogger().info("Could not read P2 bundles list " + toString(bundlesInfo));
             return null;
         }

         ArrayList<File> plugins = new ArrayList<>();

         BufferedReader r = new BufferedReader(new InputStreamReader(new FileInputStream(bundlesInfo)));
         String line;
         try {
             while ((line = r.readLine()) != null) {
                 if (line.startsWith("#")) //$NON-NLS-1$
                     continue;
                 line = line.trim();
                 if (line.length() == 0)
                     continue;

                 // (expectedState is an integer).
                 if (line.startsWith("org.eclipse.equinox.simpleconfigurator.baseUrl" + "=")) { //$NON-NLS-1$ //$NON-NLS-2$
                     continue;
                 }

                 StringTokenizer tok = new StringTokenizer(line, ",");
                 /* String symbolicName = */tok.nextToken();
                 /* String version = */tok.nextToken();
                 String location = tok.nextToken();

                 plugins.add(parsePlatformURL(pool, location));
             }
         } finally {
             r.close();
         }

         return plugins;
     }

 }
	/*******************************************************************************
	* Copyright (c) 2008, 2011 Sonatype Inc. and others.
	* All rights reserved. This program and the accompanying materials
	* are made available under the terms of the Eclipse Public License v1.0
	* which accompanies this distribution, and is available at
	* http://www.eclipse.org/legal/epl-v10.html
	*
	* Contributors:
	* Sonatype Inc. - initial API and implementation
	*******************************************************************************/
	package org.eclipse.tycho.core.osgitools.targetplatform;

	import java.io.BufferedReader;
	import java.io.File;
	import java.io.FileFilter;
	import java.io.FileInputStream;
	import java.io.FileReader;
	import java.io.IOException;
	import java.io.InputStream;
	import java.io.InputStreamReader;
	import java.util.ArrayList;
	import java.util.Arrays;
	import java.util.LinkedHashSet;
	import java.util.List;
	import java.util.Properties;
	import java.util.Set;
	import java.util.StringTokenizer;

	import org.codehaus.plexus.component.annotations.Component;
	import org.codehaus.plexus.logging.AbstractLogEnabled;
	import org.codehaus.plexus.util.xml.XmlStreamReader;
	import org.codehaus.plexus.util.xml.Xpp3Dom;
	import org.codehaus.plexus.util.xml.Xpp3DomBuilder;

	/**
	* Finds bundles in Eclipse installation.
	*
	* See http://wiki.eclipse.org/Equinox_p2_Getting_Started See
	* http://mea-bloga.blogspot.com/2008/04/new-target-platform-preference.html
	*
	* @author igor
	*
	*/

	@Component(role = EclipseInstallationLayout.class, instantiationStrategy = "per-lookup")
	public class EclipseInstallationLayout extends AbstractLogEnabled {

	private static final class FEATURE_FILTER implements FileFilter {
	@Override
	public boolean accept(File pathname) {
	if (pathname.getName().startsWith(".")) {
	// filter out all dot files (like .svn or .DS_Store).
	return false;
	}
	return pathname.isDirectory() \|\| pathname.getName().endsWith(".jar");
	}
	}

	public static final String PLUGINS = "plugins";
	public static final String FEATURES = "features";

	private File location;
	private File dropinsLocation;

	public void setLocation(File location) {
	this.location = location;
	this.dropinsLocation = new File(location, "dropins");
	}

	public File getLocation() {
	return location;
	}

	public Set<File> getFeatures(File site) {
	Set<File> result = new LinkedHashSet<>();
	File[] features = new File(site, FEATURES).listFiles(new FEATURE_FILTER());
	if (features != null) {
	result.addAll(Arrays.asList(features));
	}

	return result;
	}

	public Set<File> getInstalledPlugins() {
	Set<File> result = new LinkedHashSet<>();
	try {
	result.addAll(readBundlesTxt(location));
	} catch (IOException e) {
	getLogger().warn("Exception reading P2 bundles list", e);
	}
	return result;
	}

	public Set<File> getPlugins(File site) {
	Set<File> result = new LinkedHashSet<>();

	addPlugins(result, new File(site, PLUGINS).listFiles());

	// check for bundles in the root of dropins directory
	if (dropinsLocation.equals(site)) {
	addPlugins(result, site.listFiles());
	}

	return result;
	}

	private void addPlugins(Set<File> result, File[] plugins) {
	if (plugins != null) {
	for (File plugin : plugins) {
	if (plugin.isDirectory() && isDirectoryPlugin(plugin)) {
	result.add(plugin);
	} else if (plugin.isFile() && plugin.getName().endsWith(".jar")) {
	result.add(plugin);
	}
	}
	}
	}

	private boolean isDirectoryPlugin(File plugin) {
	return new File(plugin, "META-INF/MANIFEST.MF").canRead();
	}

	public Set<File> getSites() {
	Set<File> result = new LinkedHashSet<>();

	if (location == null) {
	return result;
	}

	if (new File(location, PLUGINS).isDirectory()) {
	result.add(location);
	}

	File platform = new File(location, "configuration/org.eclipse.update/platform.xml");
	if (platform.canRead()) {
	try {
	try (FileInputStream is = new FileInputStream(platform)) {
	XmlStreamReader reader = new XmlStreamReader(is);
	Xpp3Dom dom = Xpp3DomBuilder.build(reader);
	Xpp3Dom[] sites = dom.getChildren("site");
	for (Xpp3Dom site : sites) {
	String enabled = site.getAttribute("enabled");
	if (enabled == null \|\| Boolean.parseBoolean(enabled)) {
	File dir = parsePlatformURL(location, site.getAttribute("url"));
	if (dir != null) {
	result.add(dir);
	}
	}
	}
	}
	} catch (Exception e) {
	getLogger().warn("Exception parsing " + toString(platform), e);
	}
	}

	addLinks(result, location, new File(location, "links"));

	// deal with dropins folder
	result.add(dropinsLocation);

	File[] dropinsFiles = dropinsLocation.listFiles();
	if (dropinsFiles != null) {
	for (File dropinsFile : dropinsFiles) {
	File plugins = new File(dropinsFile, PLUGINS);
	if (plugins.isDirectory()) {
	result.add(plugins.getParentFile());
	continue;
	}
	plugins = new File(dropinsFile, "eclipse/plugins");
	if (plugins.isDirectory()) {
	result.add(plugins.getParentFile());
	}
	}
	}

	addLinks(result, location, dropinsLocation);

	return result;
	}

	private String toString(File file) {
	return file.getAbsolutePath();
	}

	private void addLinks(Set<File> result, File targetPlatform, File linksFolder) {
	File[] links = linksFolder.listFiles();
	if (links != null) {
	for (File link : links) {
	if (link.isFile() && link.canRead() && link.getName().endsWith(".link")) {
	Properties props = new Properties();
	try {
	try (InputStream is = new FileInputStream(link)) {
	props.load(is);
	}
	String path = props.getProperty("path");
	if (path != null) {
	File dir = new File(path);
	if (!dir.isAbsolute() && targetPlatform.getParentFile() != null) {
	dir = new File(targetPlatform.getParentFile(), path);
	}
	dir = dir.getAbsoluteFile();
	if (dir.isDirectory()) {
	result.add(dir);
	}
	}
	} catch (Exception e) {
	getLogger().warn("Exception parsing " + toString(link), e);
	continue;
	}
	}
	}
	}
	}

	private static final String PLATFORM_BASE_PREFIX = "platform:/base/";
	private static final String FILE_PREFIX = "file:";

	private File parsePlatformURL(File platformBase, String url) {
	if (url == null) {
	return null;
	}

	url = url.replace('\\', '/');

	String relPath = null;
	if (url.startsWith(PLATFORM_BASE_PREFIX)) {
	relPath = url.substring(PLATFORM_BASE_PREFIX.length());
	} else if (url.startsWith(FILE_PREFIX)) {
	relPath = url.substring(FILE_PREFIX.length());
	}

	if (relPath == null) {
	return null;
	}

	if (relPath.length() > 0 && relPath.charAt(0) == '/') {
	return new File(relPath);
	}

	return new File(platformBase, relPath);
	}

	private List<File> readBundlesTxt(File platformBase) throws IOException {
	getLogger().debug("Reading P2 bundles list");

	// there is no way to find location of bundle pool without access to P2 profile
	// so lets assume equinox.launcher comes from the pool
	File eclipseIni = new File(platformBase, "eclipse.ini");
	File pool = platformBase;
	if (eclipseIni.isFile() && eclipseIni.canRead()) {
	try (BufferedReader in = new BufferedReader(new FileReader(eclipseIni))) {
	String str = null;
	while ((str = in.readLine()) != null) {
	if ("-startup".equals(str.trim())) {
	str = in.readLine();
	if (str != null) {
	File file = new File(str);
	if (!file.isAbsolute()) {
	file = new File(platformBase, str).getAbsoluteFile();
	}
	pool = file.getParentFile().getParentFile().getAbsoluteFile();
	}
	break;
	}
	}
	}
	}

	getLogger().debug("Bundle pool location " + toString(pool));

	File bundlesInfo = new File(platformBase, "configuration/org.eclipse.equinox.simpleconfigurator/bundles.info");
	if (!bundlesInfo.isFile() \|\| !bundlesInfo.canRead()) {
	getLogger().info("Could not read P2 bundles list " + toString(bundlesInfo));
	return null;
	}

	ArrayList<File> plugins = new ArrayList<>();

	BufferedReader r = new BufferedReader(new InputStreamReader(new FileInputStream(bundlesInfo)));
	String line;
	try {
	while ((line = r.readLine()) != null) {
	if (line.startsWith("#")) //$NON-NLS-1$
	continue;
	line = line.trim();
	if (line.length() == 0)
	continue;

	// (expectedState is an integer).
	if (line.startsWith("org.eclipse.equinox.simpleconfigurator.baseUrl" + "=")) { //$NON-NLS-1$ //$NON-NLS-2$
	continue;
	}

	StringTokenizer tok = new StringTokenizer(line, ",");
	/* String symbolicName = */tok.nextToken();
	/* String version = */tok.nextToken();
	String location = tok.nextToken();

	plugins.add(parsePlatformURL(pool, location));
	}
	} finally {
	r.close();
	}

	return plugins;
	}

	}