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monads: Add 'text-file*'.

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* guix/monads.scm (text-file*): New procedure.
* tests/monads.scm ("text-file*"): New test.
* doc/guix.texi (The Store Monad): Change example since the previous one
  would erroneously fail to retain a reference to Coreutils.  Document
  'text-file*'.
This commit is contained in:
Ludovic Courtès
2014-02-03 23:12:54 +01:00
parent 67995f4bea
commit 45adbd624f
3 changed files with 113 additions and 14 deletions
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tests/monads.scm
+25 -1
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@@ -1,5 +1,5 @@
;;; GNU Guix --- Functional package management for GNU
;;; Copyright © 2013 Ludovic Courtès <ludo@gnu.org>
;;; Copyright © 2013, 2014 Ludovic Courtès <ludo@gnu.org>
;;;
;;; This file is part of GNU Guix.
;;;
@@ -126,6 +126,30 @@
(readlink (string-append out "/guile-rocks"))))))
#:guile-for-build (package-derivation %store %bootstrap-guile)))
(test-assert "text-file*"
(let ((references (store-lift references)))
(run-with-store %store
(mlet* %store-monad
((drv (package->derivation %bootstrap-guile))
(guile -> (derivation->output-path drv))
(file (text-file "bar" "This is bar."))
(text (text-file* "foo"
%bootstrap-guile "/bin/guile "
`(,%bootstrap-guile "out") "/bin/guile "
drv "/bin/guile "
file))
(done (built-derivations (list text)))
(out -> (derivation->output-path text))
(refs (references out)))
;; Make sure we get the right references and the right content.
(return (and (lset= string=? refs (list guile file))
(equal? (call-with-input-file out get-string-all)
(string-append guile "/bin/guile "
guile "/bin/guile "
guile "/bin/guile "
file)))))
#:guile-for-build (package-derivation %store %bootstrap-guile))))
(test-assert "mapm"
(every (lambda (monad run)
(with-monad monad