I'm trying to retrieve the most recent file uploaded before a certain time in a versioning-enabled GCS bucket. For example:
$ gsutil ls -la gs://my-versioned-bucket/
7 2016-02-28T23:59:27Z gs://my-versioned-bucket/file#1456707567816000 metageneration=1
7 2016-02-29T01:00:11Z gs://my-versioned-bucket/file#1456707611782000 metageneration=1
7 2016-02-29T01:43:02Z gs://my-versioned-bucket/file#1456710182089000 metageneration=1
TOTAL: 3 objects, 21 bytes (21 B)
Suppose I wanted to get the file that was active at the end of 2016-2-28 (namely generation #1456707567816000 in this case). Is there any better option than getting the list of all versions and looping through them?
Update real-world example:
I have a job that continuously regenerates a set of files (from an external source). Once it finishes, it starts again. An error from the external source started at time X, and renders all files generated after that date mangled. I know time X, but I don't know which set of files were corrupted. What's the easiest way to identify the most recent valid set of files (i.e. the latest generation that's older than X)?