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store: Change 'export-paths' to always export in topological order. 

* guix/store.scm (export-paths): Pass PATHS through
  'topologically-sorted' before iterating.
* tests/store.scm ("export/import paths, ensure topological order"): New
  test.
This commit is contained in:
Ludovic Courtès 2014-02-10 23:30:09 +01:00
parent 829b1b253e
commit 99fbddf9a6
2 changed files with 22 additions and 3 deletions
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6
guix/store.scm
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@ -732,10 +732,10 @@ is raised if the set of paths read from PORT is not signed (as per
(= 1 (read-int s))))
(define* (export-paths server paths port #:key (sign? #t))
"Export the store paths listed in PATHS to PORT, signing them if SIGN?
is true."
"Export the store paths listed in PATHS to PORT, in topological order,
signing them if SIGN? is true."
(let ((s (nix-server-socket server)))
(let loop ((paths paths))
(let loop ((paths (topologically-sorted server paths)))
(match paths
(()
(write-int 0 port))

19
tests/store.scm
View File

@ -398,6 +398,25 @@ Deriver: ~a~%"
get-string-all))
files)))))))
(test-assert "export/import paths, ensure topological order"
(let* ((file1 (add-text-to-store %store "foo" (random-text)))
(file2 (add-text-to-store %store "bar" (random-text)
(list file1)))
(files (list file1 file2))
(dump1 (call-with-bytevector-output-port
(cute export-paths %store (list file1 file2) <>)))
(dump2 (call-with-bytevector-output-port
(cute export-paths %store (list file2 file1) <>))))
(delete-paths %store files)
(and (every (negate file-exists?) files)
(bytevector=? dump1 dump2)
(let* ((source (open-bytevector-input-port dump1))
(imported (import-paths %store source)))
(and (equal? imported (list file1 file2))
(every file-exists? files)
(null? (references %store file1))
(equal? (list file1) (references %store file2)))))))
(test-assert "import corrupt path"
(let* ((text (random-text))
(file (add-text-to-store %store "text" text))