sort_s3_paths_by_date.sh

# Gets the most recent directory under an s3 path
aws s3 ls "${_s3socpath}/tc-east-10/" | # list contents of s3 path
grep "PRE"                            | # filter for PRE (prefix) entries
awk '{printf $2"\n"}'                 | # print the second column of output (remove the PRE column)
sed 's/\/$//'                         | # cut the trailing slash off of paths
sort -r -n -t"-" -k1 -k2 -k3          | # sort the output: reverse, with a delimiter of hyphen ('-'), by the year, then month, then date
sed -n 1p                               # return the first line of output only