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#!/usr/bin/guile \
-e main -s
!#
;;; Commentary:
;;;
;;; Scripts which finds unused imports in each file.
;;; Uses Guile's module system reflection to find what is imported,
;;; but simple looks at all unique symbols in the source file for what
;;; is used, which might lead to some discrepancies.
;;;
;;; Code:
(add-to-load-path (string-append (dirname (dirname (current-filename))) "/module"))
(add-to-load-path (dirname (current-filename)))
(use-modules (hnh util)
((srfi srfi-1) :select (lset-difference))
(rnrs lists)
(module-introspection))
;;; Module use high scores
;;; $ grop -Ho '#\?:use-module' -R module | uniq -c | sort -n
(define (main args)
(define filename (cadr args))
(define-values (module-declaration-lst forms)
(partition module-declaration?
(reverse (call-with-input-file filename get-forms))))
;; All symbols in source file, which are not in module declaration.
;; Otherwise all explicitly imported symbols would be marked as
;; used.
(define symbs (unique-symbols forms))
;; (format #t "~y" (find-module-declaration forms))
;; (format #t "~a~%" symbs)
(format #t "=== ~a ===~%" filename)
(for-each (lambda (mod)
;; all symbols imported from module
(define all-symbols (module-map (lambda (key value) key) mod))
;; Thes subset of all imported symbols from module which are used
(define used-symbols
(filter (lambda (symb) (memv symb symbs))
all-symbols))
(define used-count (length used-symbols))
(define total-count (length (module-map list mod)))
(format #t "~a/~a ~a~% used ~s~% unused ~s~%"
used-count total-count (module-name mod)
used-symbols
(lset-difference eq? all-symbols used-symbols)))
(remp (lambda (mod)
(member (module-name mod)
'((guile)
(guile-user)
(srfi srfi-1)
)))
(module-uses (resolve-module
(cadr (car module-declaration-lst))))))
(newline))
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