static SpecialFileStateValue fromStat(
FileStatusWithDigest stat, @Nullable TimestampGranularityMonitor tsgm) throws IOException {
long mtime = stat.getLastModifiedTime();
// Note that TimestampGranularityMonitor#notifyDependenceOnFileTime is a thread-safe
// method.
if (tsgm != null) {
tsgm.notifyDependenceOnFileTime(mtime);
}
return new SpecialFileStateValue(FileContentsProxy.create(mtime, stat.getNodeId()));
}
/**
* Create a FileFileStateValue instance corresponding to the given existing file.
*
* @param stat must be of type "File". (Not a symlink).
*/
private static RegularFileStateValue fromPath(
Path path, FileStatusWithDigest stat, @Nullable TimestampGranularityMonitor tsgm)
throws InconsistentFilesystemException {
Preconditions.checkState(stat.isFile(), path);
try {
byte[] digest = stat.getDigest();
if (digest == null) {
digest = path.getFastDigest();
}
if (digest == null) {
long mtime = stat.getLastModifiedTime();
// Note that TimestampGranularityMonitor#notifyDependenceOnFileTime is a thread-safe
// method.
if (tsgm != null) {
tsgm.notifyDependenceOnFileTime(mtime);
}
return new RegularFileStateValue(
stat.getSize(),
stat.getLastModifiedTime(),
null,
FileContentsProxy.create(mtime, stat.getNodeId()));
} else {
// We are careful here to avoid putting the value ID into FileMetadata if we already have
// a digest. Arbitrary filesystems may do weird things with the value ID; a digest is more
// robust.
return new RegularFileStateValue(
stat.getSize(), stat.getLastModifiedTime(), digest, null);
}
} catch (IOException e) {
String errorMessage =
e.getMessage() != null ? "error '" + e.getMessage() + "'" : "an error";
throw new InconsistentFilesystemException(
"'stat' said "
+ path
+ " is a file but then we "
+ "later encountered "
+ errorMessage
+ " which indicates that "
+ path
+ " is no "
+ "longer a file. Did you delete it during the build?");
}
}
