I would like to use the AWS CLI to query the contents of a bucket and see if a particular file exists, but the bucket contains thousands of files. How can I filter the results to only show key names that match a pattern? For example:
aws s3api list-objects --bucket myBucketName --query "Contents[?Key==*mySearchPattern*]"
The --query
argument uses JMESPath expressions. JMESPath has an internal function contains
that allows you to search for a string pattern.
This should give the desired results:
aws s3api list-objects --bucket myBucketName --query "Contents[?contains(Key, `mySearchPattern`)]"
(With Linux I needed to use single quotes '
rather than back ticks `
around mySearchPattern
.)
If you want to search for keys starting with certain characters, you can also use the --prefix
argument:
aws s3api list-objects --bucket myBucketName --prefix "myPrefixToSearchFor"