Nexus Repository Storage Space Analyzer - Takes json result from https://support.sonatype.com/hc/en-us/articles/115009519847

nexus-analyze.py

#!/usr/bin/env python3

import sys
import json
import math

space = []

def convert_size(size_bytes):
   if size_bytes == 0:
       return "0B"
   size_name = ("B", "KB", "MB", "GB", "TB", "PB", "EB", "ZB", "YB")
   i = int(math.floor(math.log(size_bytes, 1024)))
   p = math.pow(1024, i)
   s = round(size_bytes / p, 2)
   return "%s %s" % (s, size_name[i])

with open(sys.argv[1]) as json_file:
    data = json.load(json_file)


for repotype in data:
    for repo in data[repotype]['repositories']:
        space.append([data[repotype]['repositories'][repo]["totalBytes"], data[repotype]['repositories'][repo]["reclaimableBytes"], repo, repotype])

for entry in sorted(space, key=lambda x: float(x[0]), reverse=True):
    print('{} ({} reclaimable) {} ({})'.format(convert_size(entry[0]), convert_size(entry[1]), entry[2], entry[3]))

output.txt

885.06 GB (33.5 MB reclaimable) xxx (docker)
250.43 GB (186.65 GB reclaimable) xxx (docker)
106.78 GB (337.36 MB reclaimable) xxx  (default)
72.73 GB (19.36 MB reclaimable) xxx (default)
[...]