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utils: Memoize 'absolute-dirname'. 

* guix/utils.scm (absolute-dirname): Wrap in 'mlambda'.
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Ludovic Courtès 2017-06-26 17:48:28 +02:00
parent 0b1be8fd57
commit 87b711d200
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1 changed files with 12 additions and 10 deletions
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guix/utils.scm
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@ -731,17 +731,19 @@ environment variable name like \"XDG_CONFIG_HOME\"; SUFFIX is a suffix like
;;; Source location. ;;; Source location.
;;; ;;;
(define (absolute-dirname file) (define absolute-dirname
"Return the absolute name of the directory containing FILE, or #f upon ;; Memoize to avoid repeated 'stat' storms from 'search-path'.
(mlambda (file)
"Return the absolute name of the directory containing FILE, or #f upon
failure." failure."
(match (search-path %load-path file) (match (search-path %load-path file)
(#f #f) (#f #f)
((? string? file) ((? string? file)
;; If there are relative names in %LOAD-PATH, FILE can be relative and ;; If there are relative names in %LOAD-PATH, FILE can be relative and
;; needs to be canonicalized. ;; needs to be canonicalized.
(if (string-prefix? "/" file) (if (string-prefix? "/" file)
(dirname file) (dirname file)
(canonicalize-path (dirname file)))))) (canonicalize-path (dirname file)))))))
(define-syntax current-source-directory (define-syntax current-source-directory
(lambda (s) (lambda (s)