@Nullable
public static VirtualFile findGitDir(@NotNull VirtualFile rootDir) {
VirtualFile child = rootDir.findChild(DOT_GIT);
if (child == null) {
return null;
}
if (child.isDirectory()) {
return child;
}
// this is standard for submodules, although probably it can
String content;
try {
content = readFile(child);
} catch (IOException e) {
throw new RuntimeException("Couldn't read " + child, e);
}
String pathToDir;
String prefix = "gitdir:";
if (content.startsWith(prefix)) {
pathToDir = content.substring(prefix.length()).trim();
} else {
pathToDir = content;
}
if (!FileUtil.isAbsolute(pathToDir)) {
String canonicalPath = FileUtil.toCanonicalPath(FileUtil.join(rootDir.getPath(), pathToDir));
if (canonicalPath == null) {
return null;
}
pathToDir = FileUtil.toSystemIndependentName(canonicalPath);
}
return VcsUtil.getVirtualFileWithRefresh(new File(pathToDir));
}
public void setNewBase(final VirtualFile base) {
myBase = base;
myNewContentRevision = null;
myCurrentRevision = null;
myAfterFile = null;
myConflicts = null;
final String beforeName = myPatch.getBeforeName();
if (beforeName != null) {
myIoCurrentBase = PathMerger.getFile(new File(myBase.getPath()), beforeName);
myCurrentBase =
myIoCurrentBase == null ? null : VcsUtil.getVirtualFileWithRefresh(myIoCurrentBase);
myBaseExists = (myCurrentBase != null) && myCurrentBase.exists();
} else {
// creation
final String afterName = myPatch.getAfterName();
myBaseExists = true;
myIoCurrentBase = PathMerger.getFile(new File(myBase.getPath()), afterName);
myCurrentBase = VcsUtil.getVirtualFileWithRefresh(myIoCurrentBase);
}
}