/*
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* Copyright (c) 2013 by syntevo GmbH. All Rights Reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions are met:
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*
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* o Redistributions of source code must retain the above copyright notice,
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* this list of conditions and the following disclaimer.
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*
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* o Redistributions in binary form must reproduce the above copyright notice,
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* this list of conditions and the following disclaimer in the documentation
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* and/or other materials provided with the distribution.
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*
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* o Neither the name of syntevo GmbH nor the names of
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* its contributors may be used to endorse or promote products derived
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* from this software without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
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* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
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* THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
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* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR
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* CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
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* EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
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* PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS;
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* OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
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* WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE
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* OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE,
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* EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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package com.syntevo.bugtraq;
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import java.io.File;
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import java.io.IOException;
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import java.util.ArrayList;
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import java.util.Collections;
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import java.util.HashSet;
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import java.util.List;
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import java.util.Set;
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import org.eclipse.jgit.errors.ConfigInvalidException;
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import org.eclipse.jgit.lib.Config;
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import org.eclipse.jgit.lib.Constants;
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import org.eclipse.jgit.lib.FileMode;
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import org.eclipse.jgit.lib.ObjectId;
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import org.eclipse.jgit.lib.ObjectLoader;
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import org.eclipse.jgit.lib.Repository;
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import org.eclipse.jgit.revwalk.RevCommit;
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import org.eclipse.jgit.revwalk.RevTree;
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import org.eclipse.jgit.revwalk.RevWalk;
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import org.eclipse.jgit.storage.file.FileBasedConfig;
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import org.eclipse.jgit.treewalk.TreeWalk;
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import org.eclipse.jgit.treewalk.filter.PathFilterGroup;
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import org.jetbrains.annotations.NotNull;
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import org.jetbrains.annotations.Nullable;
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public final class BugtraqConfig {
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// Constants ==============================================================
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private static final String DOT_GIT_BUGTRAQ = ".gitbugtraq";
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private static final String BUGTRAQ = "bugtraq";
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private static final String URL = "url";
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private static final String ENABLED = "enabled";
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private static final String LOG_REGEX = "logRegex";
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// Static =================================================================
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@Nullable
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public static BugtraqConfig read(@NotNull Repository repository) throws IOException, ConfigInvalidException {
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final Config baseConfig = getBaseConfig(repository);
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final Set<String> allNames = new HashSet<String>();
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final Config config = repository.getConfig();
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allNames.addAll(config.getSubsections(BUGTRAQ));
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if (baseConfig != null) {
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allNames.addAll(baseConfig.getSubsections(BUGTRAQ));
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}
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final List<BugtraqEntry> entries = new ArrayList<BugtraqEntry>();
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for (String name : allNames) {
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final String url = getString(name, URL, config, baseConfig);
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final String enabled = getString(name, ENABLED, config, baseConfig);
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if (enabled != null && !"true".equals(enabled)) {
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continue;
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}
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final String logIdRegex = getString(name, LOG_REGEX, config, baseConfig);
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if (url == null || logIdRegex == null) {
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return null;
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}
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final List<String> logIdRegexs = new ArrayList<String>();
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logIdRegexs.add(logIdRegex);
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for (int index = 1; index < Integer.MAX_VALUE; index++) {
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final String logIdRegexN = getString(name, LOG_REGEX + index, config, baseConfig);
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if (logIdRegexN == null) {
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break;
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}
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logIdRegexs.add(logIdRegexN);
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}
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entries.add(new BugtraqEntry(url, logIdRegexs));
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}
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if (entries.isEmpty()) {
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return null;
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}
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return new BugtraqConfig(entries);
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}
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// Fields =================================================================
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@NotNull
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private final List<BugtraqEntry> entries;
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// Setup ==================================================================
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BugtraqConfig(@NotNull List<BugtraqEntry> entries) {
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this.entries = entries;
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}
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// Accessing ==============================================================
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@NotNull
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public List<BugtraqEntry> getEntries() {
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return Collections.unmodifiableList(entries);
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}
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// Utils ==================================================================
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@Nullable
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private static Config getBaseConfig(Repository repository) throws IOException, ConfigInvalidException {
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final Config baseConfig;
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if (repository.isBare()) {
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// read bugtraq config directly from the repository
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String content = null;
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RevWalk rw = new RevWalk(repository);
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TreeWalk tw = new TreeWalk(repository);
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tw.setFilter(PathFilterGroup.createFromStrings(DOT_GIT_BUGTRAQ));
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try {
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ObjectId headId = repository.getRef(Constants.HEAD).getTarget().getObjectId();
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RevCommit commit = rw.parseCommit(headId);
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RevTree tree = commit.getTree();
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tw.reset(tree);
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while (tw.next()) {
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ObjectId entid = tw.getObjectId(0);
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FileMode entmode = tw.getFileMode(0);
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if (FileMode.REGULAR_FILE == entmode) {
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ObjectLoader ldr = repository.open(entid, Constants.OBJ_BLOB);
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content = new String(ldr.getCachedBytes(), commit.getEncoding());
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break;
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}
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}
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} finally {
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rw.dispose();
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tw.release();
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}
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if (content == null) {
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// config not found
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baseConfig = null;
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}
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else {
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// parse the config
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Config config = new Config();
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config.fromText(content);
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baseConfig = config;
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}
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}
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else {
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// read bugtraq config from work tree
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final File baseFile = new File(repository.getWorkTree(), DOT_GIT_BUGTRAQ);
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if (baseFile.isFile()) {
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FileBasedConfig fileConfig = new FileBasedConfig(baseFile, repository.getFS());
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fileConfig.load();
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baseConfig = fileConfig;
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}
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else {
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baseConfig = null;
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}
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}
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return baseConfig;
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}
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@Nullable
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private static String getString(@NotNull String subsection, @NotNull String key, @NotNull Config config, @Nullable Config baseConfig) {
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final String value = config.getString(BUGTRAQ, subsection, key);
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if (value != null) {
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return trimMaybeNull(value);
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}
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if (baseConfig != null) {
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return trimMaybeNull(baseConfig.getString(BUGTRAQ, subsection, key));
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}
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return value;
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}
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@Nullable
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private static String trimMaybeNull(@Nullable String string) {
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if (string == null) {
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return null;
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}
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string = string.trim();
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if (string.length() == 0) {
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return null;
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}
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return string;
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}
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}
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