plugins/git4idea/src/git4idea/repo/GitConfig.java - platform/tools/idea - Git at Google

   /*
  * Copyright 2000-2011 JetBrains s.r.o.
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
  * You may obtain a copy of the License at
  *
  * http://www.apache.org/licenses/LICENSE-2.0
  *
  * Unless required by applicable law or agreed to in writing, software
  * distributed under the License is distributed on an "AS IS" BASIS,
  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
  * See the License for the specific language governing permissions and
  * limitations under the License.
  */
 package git4idea.repo;

   import com.intellij.dvcs.repo.RepoStateException;
 import com.intellij.ide.plugins.IdeaPluginDescriptor;
 import com.intellij.openapi.diagnostic.Logger;
 import com.intellij.openapi.util.Condition;
 import com.intellij.openapi.util.Pair;
 import com.intellij.openapi.util.text.StringUtil;
 import com.intellij.util.ArrayUtil;
 import com.intellij.util.Function;
 import com.intellij.util.containers.ContainerUtil;
 import git4idea.GitLocalBranch;
 import git4idea.GitPlatformFacade;
 import git4idea.GitRemoteBranch;
 import git4idea.GitSvnRemoteBranch;
 import git4idea.branch.GitBranchUtil;
 import org.ini4j.Ini;
 import org.ini4j.Profile;
 import org.jetbrains.annotations.NotNull;
 import org.jetbrains.annotations.Nullable;

 import java.io.File;
 import java.io.IOException;
 import java.util.*;
 import java.util.regex.Matcher;
 import java.util.regex.Pattern;

 /**
  * <p>Reads information from the {@code .git/config} file, and parses it to actual objects.</p>
  *
  * <p>Currently doesn't read all the information: general information about remotes and branch tracking</p>
  *
  * <p>Parsing is performed with the help of <a href="http://ini4j.sourceforge.net/">ini4j</a> library.</p>
  *
  * TODO: note, that other git configuration files (such as ~/.gitconfig) are not handled yet.
  *
  * @author Kirill Likhodedov
  */
 public class GitConfig {

   /**
    * Special remote typical for git-svn configuration:
    * <pre>[branch "trunk]
    *   remote = .
    *   merge = refs/remotes/trunk
    * </pre>
    * @deprecated Use {@link GitSvnRemoteBranch}
    */
   @Deprecated
   public static final String DOT_REMOTE = ".";

   private static final Logger LOG = Logger.getInstance(GitConfig.class);

   private static final Pattern REMOTE_SECTION = Pattern.compile("(?:svn-)?remote \"(.*)\"");
   private static final Pattern URL_SECTION = Pattern.compile("url \"(.*)\"");
   private static final Pattern BRANCH_INFO_SECTION = Pattern.compile("branch \"(.*)\"");
   private static final Pattern BRANCH_COMMON_PARAMS_SECTION = Pattern.compile("branch");

   @NotNull private final Collection<Remote> myRemotes;
   @NotNull private final Collection<Url> myUrls;
   @NotNull private final Collection<BranchConfig> myTrackedInfos;


   private GitConfig(@NotNull Collection<Remote> remotes, @NotNull Collection<Url> urls, @NotNull Collection<BranchConfig> trackedInfos) {
     myRemotes = remotes;
     myUrls = urls;
     myTrackedInfos = trackedInfos;
   }

   /**
    * <p>Returns Git remotes defined in {@code .git/config}.</p>
    *
    * <p>Remote is returned with all transformations (such as {@code pushUrl, url.<base>.insteadOf}) already applied to it.
    *    See {@link GitRemote} for details.</p>
    *
    * <p><b>Note:</b> remotes can be defined separately in {@code .git/remotes} directory, by creating a file for each remote with
    *    remote parameters written in the file. This method returns ONLY remotes defined in {@code .git/config}.</p>
    * @return Git remotes defined in {@code .git/config}.
    */
   @NotNull
   Collection<GitRemote> parseRemotes() {
     // populate GitRemotes with substituting urls when needed
     return ContainerUtil.map(myRemotes, new Function<Remote, GitRemote>() {
       @Override
       public GitRemote fun(@Nullable Remote remote) {
         assert remote != null;
         return convertRemoteToGitRemote(myUrls, remote);
       }
     });
   }

   @NotNull
   private static GitRemote convertRemoteToGitRemote(@NotNull Collection<Url> urls, @NotNull Remote remote) {
     UrlsAndPushUrls substitutedUrls = substituteUrls(urls, remote);
     return new GitRemote(remote.myName, substitutedUrls.getUrls(), substitutedUrls.getPushUrls(),
                          remote.getFetchSpecs(), computePushSpec(remote));
   }

   /**
    * Create branch tracking information based on the information defined in {@code .git/config}.
    */
   @NotNull
   Collection<GitBranchTrackInfo> parseTrackInfos(@NotNull final Collection<GitLocalBranch> localBranches,
                                                  @NotNull final Collection<GitRemoteBranch> remoteBranches) {
     return ContainerUtil.mapNotNull(myTrackedInfos, new Function<BranchConfig, GitBranchTrackInfo>() {
       @Override
       public GitBranchTrackInfo fun(BranchConfig config) {
         if (config != null) {
           return convertBranchConfig(config, localBranches, remoteBranches);
         }
         return null;
       }
     });
   }

   /**
    * Creates an instance of GitConfig by reading information from the specified {@code .git/config} file.
    * @throws RepoStateException if {@code .git/config} couldn't be read or has invalid format.<br/>
    *         If in general it has valid format, but some sections are invalid, it skips invalid sections, but reports an error.
    */
   @NotNull
   static GitConfig read(@NotNull GitPlatformFacade platformFacade, @NotNull File configFile) {
     GitConfig emptyConfig = new GitConfig(Collections.<Remote>emptyList(), Collections.<Url>emptyList(),
                                           Collections.<BranchConfig>emptyList());
     if (!configFile.exists()) {
       LOG.info("No .git/config file at " + configFile.getPath());
       return emptyConfig;
     }

     Ini ini = new Ini();
     ini.getConfig().setMultiOption(true);  // duplicate keys (e.g. url in [remote])
     ini.getConfig().setTree(false);        // don't need tree structure: it corrupts url in section name (e.g. [url "http://github.com/"]
     try {
       ini.load(configFile);
     }
     catch (IOException e) {
       LOG.warn(new RepoStateException("Couldn't load .git/config file at " + configFile.getPath(), e));
       return emptyConfig;
     }

     IdeaPluginDescriptor plugin = platformFacade.getPluginByClassName(GitConfig.class.getName());
     ClassLoader classLoader = plugin == null ? null : plugin.getPluginClassLoader(); // null if IDEA is started from IDEA

     Pair<Collection<Remote>, Collection<Url>> remotesAndUrls = parseRemotes(ini, classLoader);
     Collection<BranchConfig> trackedInfos = parseTrackedInfos(ini, classLoader);

     return new GitConfig(remotesAndUrls.getFirst(), remotesAndUrls.getSecond(), trackedInfos);
   }

   @NotNull
   private static Collection<BranchConfig> parseTrackedInfos(@NotNull Ini ini, @Nullable ClassLoader classLoader) {
     Collection<BranchConfig> configs = new ArrayList<BranchConfig>();
     for (Map.Entry<String, Profile.Section> stringSectionEntry : ini.entrySet()) {
       String sectionName = stringSectionEntry.getKey();
       Profile.Section section = stringSectionEntry.getValue();
       if (sectionName.startsWith("branch")) {
         BranchConfig branchConfig = parseBranchSection(sectionName, section,  classLoader);
         if (branchConfig != null) {
           configs.add(branchConfig);
         }
       }
     }
     return configs;
   }

   @Nullable
   private static GitBranchTrackInfo convertBranchConfig(@Nullable BranchConfig branchConfig,
                                                         @NotNull Collection<GitLocalBranch> localBranches,
                                                         @NotNull Collection<GitRemoteBranch> remoteBranches) {
     if (branchConfig == null) {
       return null;
     }
     final String branchName = branchConfig.getName();
     String remoteName = branchConfig.getBean().getRemote();
     String mergeName = branchConfig.getBean().getMerge();
     String rebaseName = branchConfig.getBean().getRebase();

     if (StringUtil.isEmptyOrSpaces(mergeName) && StringUtil.isEmptyOrSpaces(rebaseName)) {
       LOG.info("No branch." + branchName + ".merge/rebase item in the .git/config");
       return null;
     }
     if (StringUtil.isEmptyOrSpaces(remoteName)) {
       LOG.info("No branch." + branchName + ".remote item in the .git/config");
       return null;
     }

     boolean merge = mergeName != null;
     final String remoteBranchName = (merge ? mergeName : rebaseName);
     assert remoteName != null;
     assert remoteBranchName != null;

     GitLocalBranch localBranch = findLocalBranch(branchName, localBranches);
     GitRemoteBranch remoteBranch = GitBranchUtil.findRemoteBranchByName(remoteBranchName, remoteName, remoteBranches);
     if (localBranch == null || remoteBranch == null) {
       return null;
     }
     return new GitBranchTrackInfo(localBranch, remoteBranch, merge);
   }

   @Nullable
   private static GitLocalBranch findLocalBranch(@NotNull String branchName, @NotNull Collection<GitLocalBranch> localBranches) {
     final String name = GitBranchUtil.stripRefsPrefix(branchName);
     try {
       return ContainerUtil.find(localBranches, new Condition<GitLocalBranch>() {
         @Override
         public boolean value(@Nullable GitLocalBranch input) {
           assert input != null;
           return input.getName().equals(name);
         }
       });
     }
     catch (NoSuchElementException e) {
       LOG.info("Couldn't find branch with name " + name);
       return null;
     }
   }

   @Nullable
   private static BranchConfig parseBranchSection(String sectionName, Profile.Section section, @Nullable ClassLoader classLoader) {
     BranchBean branchBean = section.as(BranchBean.class, classLoader);
     Matcher matcher = BRANCH_INFO_SECTION.matcher(sectionName);
     if (matcher.matches()) {
       return new BranchConfig(matcher.group(1), branchBean);
     }
     if (BRANCH_COMMON_PARAMS_SECTION.matcher(sectionName).matches()) {
       LOG.debug(String.format("Common branch option(s) defined .git/config. sectionName: %s%n section: %s", sectionName, section));
       return null;
     }
     LOG.error(String.format("Invalid branch section format in .git/config. sectionName: %s%n section: %s", sectionName, section));
     return null;
   }

   @NotNull
   private static Pair<Collection<Remote>, Collection<Url>> parseRemotes(@NotNull Ini ini, @Nullable ClassLoader classLoader) {
     Collection<Remote> remotes = new ArrayList<Remote>();
     Collection<Url> urls = new ArrayList<Url>();
     for (Map.Entry<String, Profile.Section> stringSectionEntry : ini.entrySet()) {
       String sectionName = stringSectionEntry.getKey();
       Profile.Section section = stringSectionEntry.getValue();

       if (sectionName.startsWith("remote") || sectionName.startsWith("svn-remote")) {
         Remote remote = parseRemoteSection(sectionName, section, classLoader);
         if (remote != null) {
           remotes.add(remote);
         }
       }
       else if (sectionName.startsWith("url")) {
         Url url = parseUrlSection(sectionName, section, classLoader);
         if (url != null) {
           urls.add(url);
         }
       }
     }
     return Pair.create(remotes, urls);
   }

   @NotNull
   private static List<String> computePushSpec(@NotNull Remote remote) {
     List<String> pushSpec = remote.getPushSpec();
     return pushSpec == null ? remote.getFetchSpecs() : pushSpec;
   }

   /**
    * <p>
    *   Applies {@code url.<base>.insteadOf} and {@code url.<base>.pushInsteadOf} transformations to {@code url} and {@code pushUrl} of
    *   the given remote.
    * </p>
    * <p>
    *   The logic, is as follows:
    *   <ul>
    *     <li>If remote.url starts with url.insteadOf, it it substituted.</li>
    *     <li>If remote.pushUrl starts with url.insteadOf, it is substituted.</li>
    *     <li>If remote.pushUrl starts with url.pushInsteadOf, it is not substituted.</li>
    *     <li>If remote.url starts with url.pushInsteadOf, but remote.pushUrl is given, additional push url is not added.</li>
    *   </ul>
    * </p>
    *
    * <p>
    *   TODO: if there are several matches in url sections, the longest should be applied. // currently only one is applied
    * </p>
    *
    * <p>
    *   This is according to {@code man git-config ("url.<base>.insteadOf" and "url.<base>.pushInsteadOf" sections},
    *   {@code man git-push ("URLS" section)} and the following discussions in the Git mailing list:
    *   <a href="http://article.gmane.org/gmane.comp.version-control.git/183587">insteadOf override urls and pushUrls</a>,
    *   <a href="http://thread.gmane.org/gmane.comp.version-control.git/127910">pushInsteadOf doesn't override explicit pushUrl</a>.
    * </p>
    */
   @NotNull
   private static UrlsAndPushUrls substituteUrls(@NotNull Collection<Url> urlSections, @NotNull Remote remote) {
     List<String> urls = new ArrayList<String>(remote.getUrls().size());
     Collection<String> pushUrls = new ArrayList<String>();

     // urls are substituted by insteadOf
     // if there are no pushUrls, we create a pushUrl for pushInsteadOf substitutions
     for (final String remoteUrl : remote.getUrls()) {
       boolean substituted = false;
       for (Url url : urlSections) {
         String insteadOf = url.getInsteadOf();
         String pushInsteadOf = url.getPushInsteadOf();
         // null means no entry, i.e. nothing to substitute. Empty string means substituting everything
         if (insteadOf != null && remoteUrl.startsWith(insteadOf)) {
           urls.add(substituteUrl(remoteUrl, url, insteadOf));
           substituted = true;
           break;
         }
         else if (pushInsteadOf != null && remoteUrl.startsWith(pushInsteadOf)) {
           if (remote.getPushUrls().isEmpty()) { // only if there are no explicit pushUrls
               pushUrls.add(substituteUrl(remoteUrl, url, pushInsteadOf)); // pushUrl is different
           }
           urls.add(remoteUrl);                                             // but url is left intact
           substituted = true;
           break;
         }
       }
       if (!substituted) {
         urls.add(remoteUrl);
       }
     }

     // pushUrls are substituted only by insteadOf, not by pushInsteadOf
     for (final String remotePushUrl : remote.getPushUrls()) {
       boolean substituted = false;
       for (Url url : urlSections) {
         String insteadOf = url.getInsteadOf();
         // null means no entry, i.e. nothing to substitute. Empty string means substituting everything
         if (insteadOf != null && remotePushUrl.startsWith(insteadOf)) {
           pushUrls.add(substituteUrl(remotePushUrl, url, insteadOf));
           substituted = true;
           break;
         }
       }
       if (!substituted) {
         pushUrls.add(remotePushUrl);
       }
     }

     // if no pushUrls are explicitly defined yet via pushUrl or url.<base>.pushInsteadOf, they are the same as urls.
     if (pushUrls.isEmpty()) {
       pushUrls = new ArrayList<String>(urls);
     }

     return new UrlsAndPushUrls(urls, pushUrls);
   }

   private static class UrlsAndPushUrls {
     final List<String> myUrls;
     final Collection<String> myPushUrls;

     private UrlsAndPushUrls(List<String> urls, Collection<String> pushUrls) {
       myPushUrls = pushUrls;
       myUrls = urls;
     }

     public Collection<String> getPushUrls() {
       return myPushUrls;
     }

     public List<String> getUrls() {
       return myUrls;
     }
   }

   @NotNull
   private static String substituteUrl(@NotNull String remoteUrl, @NotNull Url url, @NotNull String insteadOf) {
     return url.myName + remoteUrl.substring(insteadOf.length());
   }

   @Nullable
   private static Remote parseRemoteSection(@NotNull String sectionName, @NotNull Profile.Section section, @Nullable ClassLoader classLoader) {
     RemoteBean remoteBean = section.as(RemoteBean.class, classLoader);
     Matcher matcher = REMOTE_SECTION.matcher(sectionName);
     if (matcher.matches()) {
       return new Remote(matcher.group(1), remoteBean);
     }
     LOG.error(String.format("Invalid remote section format in .git/config. sectionName: %s section: %s", sectionName, section));
     return null;
   }

   @Nullable
   private static Url parseUrlSection(@NotNull String sectionName, @NotNull Profile.Section section, @Nullable ClassLoader classLoader) {
     UrlBean urlBean = section.as(UrlBean.class, classLoader);
     Matcher matcher = URL_SECTION.matcher(sectionName);
     if (matcher.matches()) {
       return new Url(matcher.group(1), urlBean);
     }
     LOG.error(String.format("Invalid url section format in .git/config. sectionName: %s section: %s", sectionName, section));
     return null;
   }

   private static class Remote {

     private final String myName;
     private final RemoteBean myRemoteBean;

     private Remote(@NotNull String name, @NotNull RemoteBean remoteBean) {
       myRemoteBean = remoteBean;
       myName = name;
     }

     @NotNull
     private Collection<String> getUrls() {
       return nonNullCollection(myRemoteBean.getUrl());
     }

     @NotNull
     private Collection<String> getPushUrls() {
       return nonNullCollection(myRemoteBean.getPushUrl());
     }

     @Nullable
     // no need in wrapping null here - we check for it in #computePushSpec
     private List<String> getPushSpec() {
       String[] push = myRemoteBean.getPush();
       return push == null ? null : Arrays.asList(push);
     }

     @NotNull
     private List<String> getFetchSpecs() {
       return Arrays.asList(notNull(myRemoteBean.getFetch()));
     }

   }

   private interface RemoteBean {
     @Nullable String[] getFetch();
     @Nullable String[] getPush();
     @Nullable String[] getUrl();
     @Nullable String[] getPushUrl();
   }

   private static class Url {
     private final String myName;
     private final UrlBean myUrlBean;

     private Url(String name, UrlBean urlBean) {
       myUrlBean = urlBean;
       myName = name;
     }

     @Nullable
     // null means to entry, i.e. nothing to substitute. Empty string means substituting everything
     public String getInsteadOf() {
       return myUrlBean.getInsteadOf();
     }

     @Nullable
     // null means to entry, i.e. nothing to substitute. Empty string means substituting everything
     public String getPushInsteadOf() {
       return myUrlBean.getPushInsteadOf();
     }
   }

   private interface UrlBean {
     @Nullable String getInsteadOf();
     @Nullable String getPushInsteadOf();
   }

   private static class BranchConfig {
     private final String myName;
     private final BranchBean myBean;

     public BranchConfig(String name, BranchBean bean) {
       myName = name;
       myBean = bean;
     }

     public String getName() {
       return myName;
     }

     public BranchBean getBean() {
       return myBean;
     }
   }

   private interface BranchBean {
     @Nullable String getRemote();
     @Nullable String getMerge();
     @Nullable String getRebase();
   }

   @NotNull
   private static String[] notNull(@Nullable String[] s) {
     return s == null ? ArrayUtil.EMPTY_STRING_ARRAY : s;
   }

   @NotNull
   private static Collection<String> nonNullCollection(@Nullable String[] array) {
     return array == null ? Collections.<String>emptyList() : new ArrayList<String>(Arrays.asList(array));
   }

 }
	/*
	* Copyright 2000-2011 JetBrains s.r.o.
	*
	* Licensed under the Apache License, Version 2.0 (the "License");
	* you may not use this file except in compliance with the License.
	* You may obtain a copy of the License at
	*
	* http://www.apache.org/licenses/LICENSE-2.0
	*
	* Unless required by applicable law or agreed to in writing, software
	* distributed under the License is distributed on an "AS IS" BASIS,
	* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
	* See the License for the specific language governing permissions and
	* limitations under the License.
	*/
	package git4idea.repo;

	import com.intellij.dvcs.repo.RepoStateException;
	import com.intellij.ide.plugins.IdeaPluginDescriptor;
	import com.intellij.openapi.diagnostic.Logger;
	import com.intellij.openapi.util.Condition;
	import com.intellij.openapi.util.Pair;
	import com.intellij.openapi.util.text.StringUtil;
	import com.intellij.util.ArrayUtil;
	import com.intellij.util.Function;
	import com.intellij.util.containers.ContainerUtil;
	import git4idea.GitLocalBranch;
	import git4idea.GitPlatformFacade;
	import git4idea.GitRemoteBranch;
	import git4idea.GitSvnRemoteBranch;
	import git4idea.branch.GitBranchUtil;
	import org.ini4j.Ini;
	import org.ini4j.Profile;
	import org.jetbrains.annotations.NotNull;
	import org.jetbrains.annotations.Nullable;

	import java.io.File;
	import java.io.IOException;
	import java.util.*;
	import java.util.regex.Matcher;
	import java.util.regex.Pattern;

	/**
	* <p>Reads information from the {@code .git/config} file, and parses it to actual objects.</p>
	*
	* <p>Currently doesn't read all the information: general information about remotes and branch tracking</p>
	*
	* <p>Parsing is performed with the help of <a href="http://ini4j.sourceforge.net/">ini4j</a> library.</p>
	*
	* TODO: note, that other git configuration files (such as ~/.gitconfig) are not handled yet.
	*
	* @author Kirill Likhodedov
	*/
	public class GitConfig {

	/**
	* Special remote typical for git-svn configuration:
	* <pre>[branch "trunk]
	* remote = .
	* merge = refs/remotes/trunk
	* </pre>
	* @deprecated Use {@link GitSvnRemoteBranch}
	*/
	@Deprecated
	public static final String DOT_REMOTE = ".";

	private static final Logger LOG = Logger.getInstance(GitConfig.class);

	private static final Pattern REMOTE_SECTION = Pattern.compile("(?:svn-)?remote \"(.*)\"");
	private static final Pattern URL_SECTION = Pattern.compile("url \"(.*)\"");
	private static final Pattern BRANCH_INFO_SECTION = Pattern.compile("branch \"(.*)\"");
	private static final Pattern BRANCH_COMMON_PARAMS_SECTION = Pattern.compile("branch");

	@NotNull private final Collection<Remote> myRemotes;
	@NotNull private final Collection<Url> myUrls;
	@NotNull private final Collection<BranchConfig> myTrackedInfos;


	private GitConfig(@NotNull Collection<Remote> remotes, @NotNull Collection<Url> urls, @NotNull Collection<BranchConfig> trackedInfos) {
	myRemotes = remotes;
	myUrls = urls;
	myTrackedInfos = trackedInfos;
	}

	/**
	* <p>Returns Git remotes defined in {@code .git/config}.</p>
	*
	* <p>Remote is returned with all transformations (such as {@code pushUrl, url.<base>.insteadOf}) already applied to it.
	* See {@link GitRemote} for details.</p>
	*
	* <p><b>Note:</b> remotes can be defined separately in {@code .git/remotes} directory, by creating a file for each remote with
	* remote parameters written in the file. This method returns ONLY remotes defined in {@code .git/config}.</p>
	* @return Git remotes defined in {@code .git/config}.
	*/
	@NotNull
	Collection<GitRemote> parseRemotes() {
	// populate GitRemotes with substituting urls when needed
	return ContainerUtil.map(myRemotes, new Function<Remote, GitRemote>() {
	@Override
	public GitRemote fun(@Nullable Remote remote) {
	assert remote != null;
	return convertRemoteToGitRemote(myUrls, remote);
	}
	});
	}

	@NotNull
	private static GitRemote convertRemoteToGitRemote(@NotNull Collection<Url> urls, @NotNull Remote remote) {
	UrlsAndPushUrls substitutedUrls = substituteUrls(urls, remote);
	return new GitRemote(remote.myName, substitutedUrls.getUrls(), substitutedUrls.getPushUrls(),
	remote.getFetchSpecs(), computePushSpec(remote));
	}

	/**
	* Create branch tracking information based on the information defined in {@code .git/config}.
	*/
	@NotNull
	Collection<GitBranchTrackInfo> parseTrackInfos(@NotNull final Collection<GitLocalBranch> localBranches,
	@NotNull final Collection<GitRemoteBranch> remoteBranches) {
	return ContainerUtil.mapNotNull(myTrackedInfos, new Function<BranchConfig, GitBranchTrackInfo>() {
	@Override
	public GitBranchTrackInfo fun(BranchConfig config) {
	if (config != null) {
	return convertBranchConfig(config, localBranches, remoteBranches);
	}
	return null;
	}
	});
	}

	/**
	* Creates an instance of GitConfig by reading information from the specified {@code .git/config} file.
	* @throws RepoStateException if {@code .git/config} couldn't be read or has invalid format.<br/>
	* If in general it has valid format, but some sections are invalid, it skips invalid sections, but reports an error.
	*/
	@NotNull
	static GitConfig read(@NotNull GitPlatformFacade platformFacade, @NotNull File configFile) {
	GitConfig emptyConfig = new GitConfig(Collections.<Remote>emptyList(), Collections.<Url>emptyList(),
	Collections.<BranchConfig>emptyList());
	if (!configFile.exists()) {
	LOG.info("No .git/config file at " + configFile.getPath());
	return emptyConfig;
	}

	Ini ini = new Ini();
	ini.getConfig().setMultiOption(true); // duplicate keys (e.g. url in [remote])
	ini.getConfig().setTree(false); // don't need tree structure: it corrupts url in section name (e.g. [url "http://github.com/"]
	try {
	ini.load(configFile);
	}
	catch (IOException e) {
	LOG.warn(new RepoStateException("Couldn't load .git/config file at " + configFile.getPath(), e));
	return emptyConfig;
	}

	IdeaPluginDescriptor plugin = platformFacade.getPluginByClassName(GitConfig.class.getName());
	ClassLoader classLoader = plugin == null ? null : plugin.getPluginClassLoader(); // null if IDEA is started from IDEA

	Pair<Collection<Remote>, Collection<Url>> remotesAndUrls = parseRemotes(ini, classLoader);
	Collection<BranchConfig> trackedInfos = parseTrackedInfos(ini, classLoader);

	return new GitConfig(remotesAndUrls.getFirst(), remotesAndUrls.getSecond(), trackedInfos);
	}

	@NotNull
	private static Collection<BranchConfig> parseTrackedInfos(@NotNull Ini ini, @Nullable ClassLoader classLoader) {
	Collection<BranchConfig> configs = new ArrayList<BranchConfig>();
	for (Map.Entry<String, Profile.Section> stringSectionEntry : ini.entrySet()) {
	String sectionName = stringSectionEntry.getKey();
	Profile.Section section = stringSectionEntry.getValue();
	if (sectionName.startsWith("branch")) {
	BranchConfig branchConfig = parseBranchSection(sectionName, section, classLoader);
	if (branchConfig != null) {
	configs.add(branchConfig);
	}
	}
	}
	return configs;
	}

	@Nullable
	private static GitBranchTrackInfo convertBranchConfig(@Nullable BranchConfig branchConfig,
	@NotNull Collection<GitLocalBranch> localBranches,
	@NotNull Collection<GitRemoteBranch> remoteBranches) {
	if (branchConfig == null) {
	return null;
	}
	final String branchName = branchConfig.getName();
	String remoteName = branchConfig.getBean().getRemote();
	String mergeName = branchConfig.getBean().getMerge();
	String rebaseName = branchConfig.getBean().getRebase();

	if (StringUtil.isEmptyOrSpaces(mergeName) && StringUtil.isEmptyOrSpaces(rebaseName)) {
	LOG.info("No branch." + branchName + ".merge/rebase item in the .git/config");
	return null;
	}
	if (StringUtil.isEmptyOrSpaces(remoteName)) {
	LOG.info("No branch." + branchName + ".remote item in the .git/config");
	return null;
	}

	boolean merge = mergeName != null;
	final String remoteBranchName = (merge ? mergeName : rebaseName);
	assert remoteName != null;
	assert remoteBranchName != null;

	GitLocalBranch localBranch = findLocalBranch(branchName, localBranches);
	GitRemoteBranch remoteBranch = GitBranchUtil.findRemoteBranchByName(remoteBranchName, remoteName, remoteBranches);
	if (localBranch == null \|\| remoteBranch == null) {
	return null;
	}
	return new GitBranchTrackInfo(localBranch, remoteBranch, merge);
	}

	@Nullable
	private static GitLocalBranch findLocalBranch(@NotNull String branchName, @NotNull Collection<GitLocalBranch> localBranches) {
	final String name = GitBranchUtil.stripRefsPrefix(branchName);
	try {
	return ContainerUtil.find(localBranches, new Condition<GitLocalBranch>() {
	@Override
	public boolean value(@Nullable GitLocalBranch input) {
	assert input != null;
	return input.getName().equals(name);
	}
	});
	}
	catch (NoSuchElementException e) {
	LOG.info("Couldn't find branch with name " + name);
	return null;
	}
	}

	@Nullable
	private static BranchConfig parseBranchSection(String sectionName, Profile.Section section, @Nullable ClassLoader classLoader) {
	BranchBean branchBean = section.as(BranchBean.class, classLoader);
	Matcher matcher = BRANCH_INFO_SECTION.matcher(sectionName);
	if (matcher.matches()) {
	return new BranchConfig(matcher.group(1), branchBean);
	}
	if (BRANCH_COMMON_PARAMS_SECTION.matcher(sectionName).matches()) {
	LOG.debug(String.format("Common branch option(s) defined .git/config. sectionName: %s%n section: %s", sectionName, section));
	return null;
	}
	LOG.error(String.format("Invalid branch section format in .git/config. sectionName: %s%n section: %s", sectionName, section));
	return null;
	}

	@NotNull
	private static Pair<Collection<Remote>, Collection<Url>> parseRemotes(@NotNull Ini ini, @Nullable ClassLoader classLoader) {
	Collection<Remote> remotes = new ArrayList<Remote>();
	Collection<Url> urls = new ArrayList<Url>();
	for (Map.Entry<String, Profile.Section> stringSectionEntry : ini.entrySet()) {
	String sectionName = stringSectionEntry.getKey();
	Profile.Section section = stringSectionEntry.getValue();

	if (sectionName.startsWith("remote") \|\| sectionName.startsWith("svn-remote")) {
	Remote remote = parseRemoteSection(sectionName, section, classLoader);
	if (remote != null) {
	remotes.add(remote);
	}
	}
	else if (sectionName.startsWith("url")) {
	Url url = parseUrlSection(sectionName, section, classLoader);
	if (url != null) {
	urls.add(url);
	}
	}
	}
	return Pair.create(remotes, urls);
	}

	@NotNull
	private static List<String> computePushSpec(@NotNull Remote remote) {
	List<String> pushSpec = remote.getPushSpec();
	return pushSpec == null ? remote.getFetchSpecs() : pushSpec;
	}

	/**
	* <p>
	* Applies {@code url.<base>.insteadOf} and {@code url.<base>.pushInsteadOf} transformations to {@code url} and {@code pushUrl} of
	* the given remote.
	* </p>
	* <p>
	* The logic, is as follows:
	* <ul>
	* <li>If remote.url starts with url.insteadOf, it it substituted.</li>
	* <li>If remote.pushUrl starts with url.insteadOf, it is substituted.</li>
	* <li>If remote.pushUrl starts with url.pushInsteadOf, it is not substituted.</li>
	* <li>If remote.url starts with url.pushInsteadOf, but remote.pushUrl is given, additional push url is not added.</li>
	* </ul>
	* </p>
	*
	* <p>
	* TODO: if there are several matches in url sections, the longest should be applied. // currently only one is applied
	* </p>
	*
	* <p>
	* This is according to {@code man git-config ("url.<base>.insteadOf" and "url.<base>.pushInsteadOf" sections},
	* {@code man git-push ("URLS" section)} and the following discussions in the Git mailing list:
	* <a href="http://article.gmane.org/gmane.comp.version-control.git/183587">insteadOf override urls and pushUrls</a>,
	* <a href="http://thread.gmane.org/gmane.comp.version-control.git/127910">pushInsteadOf doesn't override explicit pushUrl</a>.
	* </p>
	*/
	@NotNull
	private static UrlsAndPushUrls substituteUrls(@NotNull Collection<Url> urlSections, @NotNull Remote remote) {
	List<String> urls = new ArrayList<String>(remote.getUrls().size());
	Collection<String> pushUrls = new ArrayList<String>();

	// urls are substituted by insteadOf
	// if there are no pushUrls, we create a pushUrl for pushInsteadOf substitutions
	for (final String remoteUrl : remote.getUrls()) {
	boolean substituted = false;
	for (Url url : urlSections) {
	String insteadOf = url.getInsteadOf();
	String pushInsteadOf = url.getPushInsteadOf();
	// null means no entry, i.e. nothing to substitute. Empty string means substituting everything
	if (insteadOf != null && remoteUrl.startsWith(insteadOf)) {
	urls.add(substituteUrl(remoteUrl, url, insteadOf));
	substituted = true;
	break;
	}
	else if (pushInsteadOf != null && remoteUrl.startsWith(pushInsteadOf)) {
	if (remote.getPushUrls().isEmpty()) { // only if there are no explicit pushUrls
	pushUrls.add(substituteUrl(remoteUrl, url, pushInsteadOf)); // pushUrl is different
	}
	urls.add(remoteUrl); // but url is left intact
	substituted = true;
	break;
	}
	}
	if (!substituted) {
	urls.add(remoteUrl);
	}
	}

	// pushUrls are substituted only by insteadOf, not by pushInsteadOf
	for (final String remotePushUrl : remote.getPushUrls()) {
	boolean substituted = false;
	for (Url url : urlSections) {
	String insteadOf = url.getInsteadOf();
	// null means no entry, i.e. nothing to substitute. Empty string means substituting everything
	if (insteadOf != null && remotePushUrl.startsWith(insteadOf)) {
	pushUrls.add(substituteUrl(remotePushUrl, url, insteadOf));
	substituted = true;
	break;
	}
	}
	if (!substituted) {
	pushUrls.add(remotePushUrl);
	}
	}

	// if no pushUrls are explicitly defined yet via pushUrl or url.<base>.pushInsteadOf, they are the same as urls.
	if (pushUrls.isEmpty()) {
	pushUrls = new ArrayList<String>(urls);
	}

	return new UrlsAndPushUrls(urls, pushUrls);
	}

	private static class UrlsAndPushUrls {
	final List<String> myUrls;
	final Collection<String> myPushUrls;

	private UrlsAndPushUrls(List<String> urls, Collection<String> pushUrls) {
	myPushUrls = pushUrls;
	myUrls = urls;
	}

	public Collection<String> getPushUrls() {
	return myPushUrls;
	}

	public List<String> getUrls() {
	return myUrls;
	}
	}

	@NotNull
	private static String substituteUrl(@NotNull String remoteUrl, @NotNull Url url, @NotNull String insteadOf) {
	return url.myName + remoteUrl.substring(insteadOf.length());
	}

	@Nullable
	private static Remote parseRemoteSection(@NotNull String sectionName, @NotNull Profile.Section section, @Nullable ClassLoader classLoader) {
	RemoteBean remoteBean = section.as(RemoteBean.class, classLoader);
	Matcher matcher = REMOTE_SECTION.matcher(sectionName);
	if (matcher.matches()) {
	return new Remote(matcher.group(1), remoteBean);
	}
	LOG.error(String.format("Invalid remote section format in .git/config. sectionName: %s section: %s", sectionName, section));
	return null;
	}

	@Nullable
	private static Url parseUrlSection(@NotNull String sectionName, @NotNull Profile.Section section, @Nullable ClassLoader classLoader) {
	UrlBean urlBean = section.as(UrlBean.class, classLoader);
	Matcher matcher = URL_SECTION.matcher(sectionName);
	if (matcher.matches()) {
	return new Url(matcher.group(1), urlBean);
	}
	LOG.error(String.format("Invalid url section format in .git/config. sectionName: %s section: %s", sectionName, section));
	return null;
	}

	private static class Remote {

	private final String myName;
	private final RemoteBean myRemoteBean;

	private Remote(@NotNull String name, @NotNull RemoteBean remoteBean) {
	myRemoteBean = remoteBean;
	myName = name;
	}

	@NotNull
	private Collection<String> getUrls() {
	return nonNullCollection(myRemoteBean.getUrl());
	}

	@NotNull
	private Collection<String> getPushUrls() {
	return nonNullCollection(myRemoteBean.getPushUrl());
	}

	@Nullable
	// no need in wrapping null here - we check for it in #computePushSpec
	private List<String> getPushSpec() {
	String[] push = myRemoteBean.getPush();
	return push == null ? null : Arrays.asList(push);
	}

	@NotNull
	private List<String> getFetchSpecs() {
	return Arrays.asList(notNull(myRemoteBean.getFetch()));
	}

	}

	private interface RemoteBean {
	@Nullable String[] getFetch();
	@Nullable String[] getPush();
	@Nullable String[] getUrl();
	@Nullable String[] getPushUrl();
	}

	private static class Url {
	private final String myName;
	private final UrlBean myUrlBean;

	private Url(String name, UrlBean urlBean) {
	myUrlBean = urlBean;
	myName = name;
	}

	@Nullable
	// null means to entry, i.e. nothing to substitute. Empty string means substituting everything
	public String getInsteadOf() {
	return myUrlBean.getInsteadOf();
	}

	@Nullable
	// null means to entry, i.e. nothing to substitute. Empty string means substituting everything
	public String getPushInsteadOf() {
	return myUrlBean.getPushInsteadOf();
	}
	}

	private interface UrlBean {
	@Nullable String getInsteadOf();
	@Nullable String getPushInsteadOf();
	}

	private static class BranchConfig {
	private final String myName;
	private final BranchBean myBean;

	public BranchConfig(String name, BranchBean bean) {
	myName = name;
	myBean = bean;
	}

	public String getName() {
	return myName;
	}

	public BranchBean getBean() {
	return myBean;
	}
	}

	private interface BranchBean {
	@Nullable String getRemote();
	@Nullable String getMerge();
	@Nullable String getRebase();
	}

	@NotNull
	private static String[] notNull(@Nullable String[] s) {
	return s == null ? ArrayUtil.EMPTY_STRING_ARRAY : s;
	}

	@NotNull
	private static Collection<String> nonNullCollection(@Nullable String[] array) {
	return array == null ? Collections.<String>emptyList() : new ArrayList<String>(Arrays.asList(array));
	}

	}