ManifestParser.java
- /*
- * Copyright (C) 2015, Google Inc. and others
- *
- * This program and the accompanying materials are made available under the
- * terms of the Eclipse Distribution License v. 1.0 which is available at
- * https://www.eclipse.org/org/documents/edl-v10.php.
- *
- * SPDX-License-Identifier: BSD-3-Clause
- */
- package org.eclipse.jgit.gitrepo;
- import java.io.FileInputStream;
- import java.io.IOException;
- import java.io.InputStream;
- import java.net.URI;
- import java.net.URISyntaxException;
- import java.text.MessageFormat;
- import java.util.ArrayList;
- import java.util.Collections;
- import java.util.HashMap;
- import java.util.HashSet;
- import java.util.Iterator;
- import java.util.List;
- import java.util.Map;
- import java.util.Set;
- import javax.xml.parsers.ParserConfigurationException;
- import javax.xml.parsers.SAXParserFactory;
- import org.eclipse.jgit.annotations.NonNull;
- import org.eclipse.jgit.api.errors.GitAPIException;
- import org.eclipse.jgit.gitrepo.RepoProject.CopyFile;
- import org.eclipse.jgit.gitrepo.RepoProject.LinkFile;
- import org.eclipse.jgit.gitrepo.RepoProject.ReferenceFile;
- import org.eclipse.jgit.gitrepo.internal.RepoText;
- import org.eclipse.jgit.internal.JGitText;
- import org.eclipse.jgit.lib.Repository;
- import org.xml.sax.Attributes;
- import org.xml.sax.InputSource;
- import org.xml.sax.SAXException;
- import org.xml.sax.XMLReader;
- import org.xml.sax.helpers.DefaultHandler;
- /**
- * Repo XML manifest parser.
- *
- * @see <a href="https://code.google.com/p/git-repo/">git-repo project page</a>
- * @since 4.0
- */
- public class ManifestParser extends DefaultHandler {
- private final String filename;
- private final URI baseUrl;
- private final String defaultBranch;
- private final Repository rootRepo;
- private final Map<String, Remote> remotes;
- private final Set<String> plusGroups;
- private final Set<String> minusGroups;
- private final List<RepoProject> projects;
- private final List<RepoProject> filteredProjects;
- private final IncludedFileReader includedReader;
- private String defaultRemote;
- private String defaultRevision;
- private int xmlInRead;
- private RepoProject currentProject;
- /**
- * A callback to read included xml files.
- */
- public interface IncludedFileReader {
- /**
- * Read a file from the same base dir of the manifest xml file.
- *
- * @param path
- * The relative path to the file to read
- * @return the {@code InputStream} of the file.
- * @throws GitAPIException
- * @throws IOException
- */
- public InputStream readIncludeFile(String path)
- throws GitAPIException, IOException;
- }
- /**
- * Constructor for ManifestParser
- *
- * @param includedReader
- * a
- * {@link org.eclipse.jgit.gitrepo.ManifestParser.IncludedFileReader}
- * object.
- * @param filename
- * a {@link java.lang.String} object.
- * @param defaultBranch
- * a {@link java.lang.String} object.
- * @param baseUrl
- * a {@link java.lang.String} object.
- * @param groups
- * a {@link java.lang.String} object.
- * @param rootRepo
- * a {@link org.eclipse.jgit.lib.Repository} object.
- */
- public ManifestParser(IncludedFileReader includedReader, String filename,
- String defaultBranch, String baseUrl, String groups,
- Repository rootRepo) {
- this.includedReader = includedReader;
- this.filename = filename;
- this.defaultBranch = defaultBranch;
- this.rootRepo = rootRepo;
- this.baseUrl = normalizeEmptyPath(URI.create(baseUrl));
- plusGroups = new HashSet<>();
- minusGroups = new HashSet<>();
- if (groups == null || groups.length() == 0
- || groups.equals("default")) { //$NON-NLS-1$
- // default means "all,-notdefault"
- minusGroups.add("notdefault"); //$NON-NLS-1$
- } else {
- for (String group : groups.split(",")) { //$NON-NLS-1$
- if (group.startsWith("-")) //$NON-NLS-1$
- minusGroups.add(group.substring(1));
- else
- plusGroups.add(group);
- }
- }
- remotes = new HashMap<>();
- projects = new ArrayList<>();
- filteredProjects = new ArrayList<>();
- }
- /**
- * Read the xml file.
- *
- * @param inputStream
- * a {@link java.io.InputStream} object.
- * @throws java.io.IOException
- */
- public void read(InputStream inputStream) throws IOException {
- xmlInRead++;
- final XMLReader xr;
- try {
- xr = SAXParserFactory.newInstance().newSAXParser().getXMLReader();
- } catch (SAXException | ParserConfigurationException e) {
- throw new IOException(JGitText.get().noXMLParserAvailable, e);
- }
- xr.setContentHandler(this);
- try {
- xr.parse(new InputSource(inputStream));
- } catch (SAXException e) {
- throw new IOException(RepoText.get().errorParsingManifestFile, e);
- }
- }
- /** {@inheritDoc} */
- @SuppressWarnings("nls")
- @Override
- public void startElement(
- String uri,
- String localName,
- String qName,
- Attributes attributes) throws SAXException {
- if (qName == null) {
- return;
- }
- switch (qName) {
- case "project":
- if (attributes.getValue("name") == null) {
- throw new SAXException(RepoText.get().invalidManifest);
- }
- currentProject = new RepoProject(attributes.getValue("name"),
- attributes.getValue("path"),
- attributes.getValue("revision"),
- attributes.getValue("remote"),
- attributes.getValue("groups"));
- currentProject
- .setRecommendShallow(attributes.getValue("clone-depth"));
- break;
- case "remote":
- String alias = attributes.getValue("alias");
- String fetch = attributes.getValue("fetch");
- String revision = attributes.getValue("revision");
- Remote remote = new Remote(fetch, revision);
- remotes.put(attributes.getValue("name"), remote);
- if (alias != null) {
- remotes.put(alias, remote);
- }
- break;
- case "default":
- defaultRemote = attributes.getValue("remote");
- defaultRevision = attributes.getValue("revision");
- break;
- case "copyfile":
- if (currentProject == null) {
- throw new SAXException(RepoText.get().invalidManifest);
- }
- currentProject.addCopyFile(new CopyFile(rootRepo,
- currentProject.getPath(), attributes.getValue("src"),
- attributes.getValue("dest")));
- break;
- case "linkfile":
- if (currentProject == null) {
- throw new SAXException(RepoText.get().invalidManifest);
- }
- currentProject.addLinkFile(new LinkFile(rootRepo,
- currentProject.getPath(), attributes.getValue("src"),
- attributes.getValue("dest")));
- break;
- case "include":
- String name = attributes.getValue("name");
- if (includedReader != null) {
- try (InputStream is = includedReader.readIncludeFile(name)) {
- if (is == null) {
- throw new SAXException(
- RepoText.get().errorIncludeNotImplemented);
- }
- read(is);
- } catch (Exception e) {
- throw new SAXException(MessageFormat
- .format(RepoText.get().errorIncludeFile, name), e);
- }
- } else if (filename != null) {
- int index = filename.lastIndexOf('/');
- String path = filename.substring(0, index + 1) + name;
- try (InputStream is = new FileInputStream(path)) {
- read(is);
- } catch (IOException e) {
- throw new SAXException(MessageFormat
- .format(RepoText.get().errorIncludeFile, path), e);
- }
- }
- break;
- case "remove-project": {
- String name2 = attributes.getValue("name");
- projects.removeIf((p) -> p.getName().equals(name2));
- break;
- }
- default:
- break;
- }
- }
- /** {@inheritDoc} */
- @Override
- public void endElement(
- String uri,
- String localName,
- String qName) throws SAXException {
- if ("project".equals(qName)) { //$NON-NLS-1$
- projects.add(currentProject);
- currentProject = null;
- }
- }
- /** {@inheritDoc} */
- @Override
- public void endDocument() throws SAXException {
- xmlInRead--;
- if (xmlInRead != 0)
- return;
- // Only do the following after we finished reading everything.
- Map<String, URI> remoteUrls = new HashMap<>();
- if (defaultRevision == null && defaultRemote != null) {
- Remote remote = remotes.get(defaultRemote);
- if (remote != null) {
- defaultRevision = remote.revision;
- }
- if (defaultRevision == null) {
- defaultRevision = defaultBranch;
- }
- }
- for (RepoProject proj : projects) {
- String remote = proj.getRemote();
- String revision = defaultRevision;
- if (remote == null) {
- if (defaultRemote == null) {
- if (filename != null) {
- throw new SAXException(MessageFormat.format(
- RepoText.get().errorNoDefaultFilename,
- filename));
- }
- throw new SAXException(RepoText.get().errorNoDefault);
- }
- remote = defaultRemote;
- } else {
- Remote r = remotes.get(remote);
- if (r != null && r.revision != null) {
- revision = r.revision;
- }
- }
- URI remoteUrl = remoteUrls.get(remote);
- if (remoteUrl == null) {
- String fetch = remotes.get(remote).fetch;
- if (fetch == null) {
- throw new SAXException(MessageFormat
- .format(RepoText.get().errorNoFetch, remote));
- }
- remoteUrl = normalizeEmptyPath(baseUrl.resolve(fetch));
- remoteUrls.put(remote, remoteUrl);
- }
- proj.setUrl(remoteUrl.resolve(proj.getName()).toString())
- .setDefaultRevision(revision);
- }
- filteredProjects.addAll(projects);
- removeNotInGroup();
- removeOverlaps();
- }
- static URI normalizeEmptyPath(URI u) {
- // URI.create("scheme://host").resolve("a/b") => "scheme://hosta/b"
- // That seems like bug https://bugs.openjdk.java.net/browse/JDK-4666701.
- // We workaround this by special casing the empty path case.
- if (u.getHost() != null && !u.getHost().isEmpty() &&
- (u.getPath() == null || u.getPath().isEmpty())) {
- try {
- return new URI(u.getScheme(),
- u.getUserInfo(), u.getHost(), u.getPort(),
- "/", u.getQuery(), u.getFragment()); //$NON-NLS-1$
- } catch (URISyntaxException x) {
- throw new IllegalArgumentException(x.getMessage(), x);
- }
- }
- return u;
- }
- /**
- * Getter for projects.
- *
- * @return projects list reference, never null
- */
- public List<RepoProject> getProjects() {
- return projects;
- }
- /**
- * Getter for filterdProjects.
- *
- * @return filtered projects list reference, never null
- */
- @NonNull
- public List<RepoProject> getFilteredProjects() {
- return filteredProjects;
- }
- /** Remove projects that are not in our desired groups. */
- void removeNotInGroup() {
- Iterator<RepoProject> iter = filteredProjects.iterator();
- while (iter.hasNext())
- if (!inGroups(iter.next()))
- iter.remove();
- }
- /** Remove projects that sits in a subdirectory of any other project. */
- void removeOverlaps() {
- Collections.sort(filteredProjects);
- Iterator<RepoProject> iter = filteredProjects.iterator();
- if (!iter.hasNext())
- return;
- RepoProject last = iter.next();
- while (iter.hasNext()) {
- RepoProject p = iter.next();
- if (last.isAncestorOf(p))
- iter.remove();
- else
- last = p;
- }
- removeNestedCopyAndLinkfiles();
- }
- private void removeNestedCopyAndLinkfiles() {
- for (RepoProject proj : filteredProjects) {
- List<CopyFile> copyfiles = new ArrayList<>(proj.getCopyFiles());
- proj.clearCopyFiles();
- for (CopyFile copyfile : copyfiles) {
- if (!isNestedReferencefile(copyfile)) {
- proj.addCopyFile(copyfile);
- }
- }
- List<LinkFile> linkfiles = new ArrayList<>(proj.getLinkFiles());
- proj.clearLinkFiles();
- for (LinkFile linkfile : linkfiles) {
- if (!isNestedReferencefile(linkfile)) {
- proj.addLinkFile(linkfile);
- }
- }
- }
- }
- boolean inGroups(RepoProject proj) {
- for (String group : minusGroups) {
- if (proj.inGroup(group)) {
- // minus groups have highest priority.
- return false;
- }
- }
- if (plusGroups.isEmpty() || plusGroups.contains("all")) { //$NON-NLS-1$
- // empty plus groups means "all"
- return true;
- }
- for (String group : plusGroups) {
- if (proj.inGroup(group))
- return true;
- }
- return false;
- }
- private boolean isNestedReferencefile(ReferenceFile referencefile) {
- if (referencefile.dest.indexOf('/') == -1) {
- // If the referencefile is at root level then it won't be nested.
- return false;
- }
- for (RepoProject proj : filteredProjects) {
- if (proj.getPath().compareTo(referencefile.dest) > 0) {
- // Early return as remaining projects can't be ancestor of this
- // referencefile config (filteredProjects is sorted).
- return false;
- }
- if (proj.isAncestorOf(referencefile.dest)) {
- return true;
- }
- }
- return false;
- }
- private static class Remote {
- final String fetch;
- final String revision;
- Remote(String fetch, String revision) {
- this.fetch = fetch;
- this.revision = revision;
- }
- }
- }