diff options
Diffstat (limited to 'guix/build/store-copy.scm')
| -rw-r--r-- | guix/build/store-copy.scm | 35 |
1 files changed, 34 insertions, 1 deletions
diff --git a/guix/build/store-copy.scm b/guix/build/store-copy.scm index a296bdf78f..fe2eb6f69a 100644 --- a/guix/build/store-copy.scm +++ b/guix/build/store-copy.scm @@ -1,5 +1,5 @@ ;;; GNU Guix --- Functional package management for GNU -;;; Copyright © 2013, 2014 Ludovic Courtès <ludo@gnu.org> +;;; Copyright © 2013, 2014, 2017 Ludovic Courtès <ludo@gnu.org> ;;; ;;; This file is part of GNU Guix. ;;; @@ -20,7 +20,9 @@ #:use-module (guix build utils) #:use-module (srfi srfi-1) #:use-module (ice-9 rdelim) + #:use-module (ice-9 ftw) #:export (read-reference-graph + closure-size populate-store)) ;;; Commentary: @@ -46,6 +48,37 @@ The data at PORT is the format produced by #:references-graphs." (loop (read-line port) result))))) +(define (file-size file) + "Return the size of bytes of FILE, entering it if FILE is a directory." + (file-system-fold (const #t) + (lambda (file stat result) ;leaf + (+ (stat:size stat) result)) + (lambda (directory stat result) ;down + (+ (stat:size stat) result)) + (lambda (directory stat result) ;up + result) + (lambda (file stat result) ;skip + result) + (lambda (file stat errno result) + (format (current-error-port) + "file-size: ~a: ~a~%" file + (strerror errno)) + result) + 0 + file + lstat)) + +(define (closure-size reference-graphs) + "Return an estimate of the size of the closure described by +REFERENCE-GRAPHS, a list of reference-graph files." + (define (graph-from-file file) + (call-with-input-file file read-reference-graph)) + + (define items + (delete-duplicates (append-map graph-from-file reference-graphs))) + + (reduce + 0 (map file-size items))) + (define* (populate-store reference-graphs target) "Populate the store under directory TARGET with the items specified in REFERENCE-GRAPHS, a list of reference-graph files." |