48 lines
1.8 KiB
Scheme
48 lines
1.8 KiB
Scheme
#!/usr/bin/guile \
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--no-auto-compile -e main -s
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Sort Buckets: script to sort a CSV of bucket-name,size in descending order of
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bucket size.
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Copyright (C) 2025 Ray Miller <ray@1729.org.uk>.
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This program is free software: you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation, either version 3 of the License, or
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(at your option) any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program. If not, see <http://www.gnu.org/licenses/>.
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!#
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(use-modules (ice-9 match)
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(srfi srfi-1)
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(dsv))
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(define (parse-size s)
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(match-let (((val unit) (string-split s #\space)))
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(let ((val (string->number val)))
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(match unit
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("Bytes" val)
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("KiB" (* 1024 val))
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("MiB" (* 1024 1024 val))
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("GiB" (* 1024 1024 1024 val))
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("TiB" (* 1024 1024 1024 1024 val))))))
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(define (sort-csv in-file out-file)
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(let* ((data (call-with-input-file in-file (lambda (port) (dsv->scm port #:format 'rfc4180))))
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(sorted (map cdr (sort-list
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(map (lambda (xs) (cons (parse-size (last xs)) xs)) data)
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(lambda (a b) (> (first a) (first b)))))))
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(call-with-output-file out-file (lambda (port) (scm->dsv sorted port #:format 'rfc4180)))))
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(define (main args)
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(case (length args)
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((3) (sort-csv (second args) (third args)))
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((2) (sort-csv (second args) (second args)))
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(else (error "Usage: sort-buckets FILENAME [OUTPUT]"))))
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