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build-system/haskell: Fix package.conf parsing.

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* guix/build/haskell-build-system.scm (register)[conf-depends]: Properly
  react to EOF while reading GHC package conf files.
This commit is contained in:
Eric Bavier 2016-01-19 18:01:07 -06:00
parent afe9f40949
commit 252ddedd4b
1 changed files with 3 additions and 2 deletions
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5
guix/build/haskell-build-system.scm
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@ -192,7 +192,8 @@ (define (conf-depends conf-file)
(let loop ((collecting #f)
(deps '()))
(let* ((line (read-line port))
(field (and=> (regexp-exec field-rx line)
(field (and=> (and (not (eof-object? line))
(regexp-exec field-rx line))
(cut match:substring <> 1))))
(cond
((and=> field (cut string=? <> "depends"))
@ -200,7 +201,7 @@ (define (conf-depends conf-file)
;; so drop those characters. A line may list more than one .conf.
(let ((d (string-tokenize (string-drop line 8))))
(loop #t (append d deps))))
((and collecting field)
((or (eof-object? line) (and collecting field))
(begin
(close-port port)
(reverse! deps)))