Check if file exists in s3 using ls and wildcard

Question

Seems so simple, but not getting the syntax right. I want to know if a file exists in my s3 bucket using wildcards. Something like

aws s3 ls s3://my-bucket/folder/*myfile* 

The goal is to see if a file called 2016_myfile.txt or a file called 2011_myfile.csv exists within this bucket.

If I run the command, it doesn't return anything even though I know this file exists there.

Answer 1

aws s3 ls does not support globs, but sync does and has a dry run mode. So if you do this (from an empty directory) you should get the results you want:

aws s3 sync s3://my-bucket . --exclude "*" --include "folder/*myfile*" --dryrun 

It will produce lines like this for matching files:

(dryrun) download s3://my-bucket/folder/myfile.txt to folder/myfile.txt (dryrun) download s3://my-bucket/folder/_myfile-foo.xml to folder/_myfile-foo.xml 

Answer 2

(re-drafted from comment as it appears this answered the question)

I myself tried, and failed to use wildcards in the aws-cli, and according to the docs, this is not currently supported. Simplest (though least efficient) solution would be to use grep:

aws s3 ls s3://my-bucket/folder/ | grep myfile 

Alternatively, you could write a short python/other script to do this more efficiently (but not in a single command)