static FileStateValue create(RootedPath rootedPath, @Nullable TimestampGranularityMonitor tsgm)
throws InconsistentFilesystemException, IOException {
Path path = rootedPath.asPath();
// Stat, but don't throw an exception for the common case of a nonexistent file. This still
// throws an IOException in case any other IO error is encountered.
FileStatus stat = path.statIfFound(Symlinks.NOFOLLOW);
if (stat == null) {
return NONEXISTENT_FILE_STATE_NODE;
}
return createWithStatNoFollow(rootedPath, FileStatusWithDigestAdapter.adapt(stat), tsgm);
}
static FileStateValue createWithStatNoFollow(
RootedPath rootedPath,
FileStatusWithDigest statNoFollow,
@Nullable TimestampGranularityMonitor tsgm)
throws InconsistentFilesystemException, IOException {
Path path = rootedPath.asPath();
if (statNoFollow.isFile()) {
return statNoFollow.isSpecialFile()
? SpecialFileStateValue.fromStat(statNoFollow, tsgm)
: RegularFileStateValue.fromPath(path, statNoFollow, tsgm);
} else if (statNoFollow.isDirectory()) {
return DIRECTORY_FILE_STATE_NODE;
} else if (statNoFollow.isSymbolicLink()) {
return new SymlinkFileStateValue(path.readSymbolicLinkUnchecked());
}
throw new InconsistentFilesystemException(
"according to stat, existing path "
+ path
+ " is "
+ "neither a file nor directory nor symlink.");
}
/**
* If this instance is configured with DEPEND_ON_EXTERNAL_PKG and rootedPath is a file that isn't
* under a package root then this adds a dependency on the //external package. If the action is
* ERROR_OUT, it will throw an error instead.
*/
public void maybeHandleExternalFile(RootedPath rootedPath, SkyFunction.Environment env)
throws FileOutsidePackageRootsException {
if (isInternal(rootedPath, pkgLocator.get())) {
return;
}
externalFileSeen = true;
if (externalFileAction == ExternalFileAction.ERROR_OUT) {
throw new FileOutsidePackageRootsException(rootedPath);
}
// The outputBase may be null if we're not actually running a build.
Path outputBase = pkgLocator.get().getOutputBase();
if (outputBase != null
&& !rootedPath
.asPath()
.startsWith(pkgLocator.get().getOutputBase().getRelative(Label.EXTERNAL_PATH_PREFIX))) {
return;
}
// For files that are under $OUTPUT_BASE/external, add a dependency on the //external package
// so that if the WORKSPACE file changes, the File/DirectoryStateValue will be re-evaluated.
//
// Note that:
// - We don't add a dependency on the parent directory at the package root boundary, so
// the only transitive dependencies from files inside the package roots to external files
// are through symlinks. So the upwards transitive closure of external files is small.
// - The only way other than external repositories for external source files to get into the
// skyframe graph in the first place is through symlinks outside the package roots, which we
// neither want to encourage nor optimize for since it is not common. So the set of external
// files is small.
PackageValue pkgValue =
(PackageValue) env.getValue(PackageValue.key(Label.EXTERNAL_PACKAGE_IDENTIFIER));
if (pkgValue == null) {
return;
}
Preconditions.checkState(!pkgValue.getPackage().containsErrors());
}