invalidate s3 versions of a given period

make_jsons.awk

#!/usr/bin/awk -f

# Finds objects between two versions, and creates
# "aws s3api delete-objects"-compatible json file.

# BUG: skips some of the input lines. Should emit the key/val on every line!

# Input:
# aws s3api --bucket=BUCKET  list-object-versions --output text

BEGIN { i=0; page=0; }
/VERSIONS/ && $5 > "2016-04-06T10:30:00.000Z" && $5 < "2016-04-06T12:30:00.000Z" {
    page_str=sprintf("%03d.json", page);
    if (i == 0) {
        print "{ \"Objects\": [" > page_str;
        i++;
        first=1;
        final=0;
    } else if (i == 999) {
        print "]}" >> page_str;
        i=0;
        page += 1
        final=1
    } else {
        if (first != 1) {
            print "," >> page_str;
        }
        printf ("%s", "  {\"Key\": \"" $4 "\", \"VersionId\": " $8 "\"}") >> page_str;
        first=0;
        i++;
        final=0;
    }
}
END { if (final != 1) { print "]}" >> page_str; } }