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guix package: Introduce 'evaluate-search-paths'.

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* guix/scripts/package.scm (evaluate-search-paths): New procedure, with
  most of the code formerly in 'search-path-environment-variables'.
  (search-path-environment-variables): Use it.
This commit is contained in:
Ludovic Courtès 2015-05-03 23:01:35 +02:00
parent 3badccaa73
commit 4e9f592058
1 changed files with 18 additions and 10 deletions
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28
guix/scripts/package.scm
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@ -379,10 +379,10 @@ an output path different than CURRENT-PATH."
(with-error-to-port (%make-void-port "w")
(lambda () exp)))
(define* (search-path-environment-variables entries profile
#:optional (getenv getenv))
"Return environment variable definitions that may be needed for the use of
ENTRIES, a list of manifest entries, in PROFILE. Use GETENV to determine the
(define* (evaluate-search-paths search-paths directory
#:optional (getenv (const #f)))
"Evaluate SEARCH-PATHS, a list of search-path specifications, for DIRECTORY,
and return a list of variable/value pairs. Use GETENV to determine the
current settings and report only settings not already effective."
(define search-path-definition
(match-lambda
@ -401,18 +401,26 @@ current settings and report only settings not already effective."
;; directories (see
;; <http://lists.gnu.org/archive/html/guix-devel/2015-01/msg00269.html>.)
(path (with-null-error-port
(search-path-as-list files (list profile)
(search-path-as-list files (list directory)
#:type type
#:pattern pattern))))
(if (every (cut member <> values) path)
#f
(format #f "export ~a=\"~a\""
variable
(string-join path separator)))))))
#f ;VARIABLE is already set appropriately
(cons variable (string-join path separator)))))))
(filter-map search-path-definition search-paths))
(define* (search-path-environment-variables entries profile
#:optional (getenv getenv))
"Return environment variable definitions that may be needed for the use of
ENTRIES, a list of manifest entries, in PROFILE. Use GETENV to determine the
current settings and report only settings not already effective."
(let ((search-paths (delete-duplicates
(append-map manifest-entry-search-paths entries))))
(filter-map search-path-definition search-paths)))
(filter-map (match-lambda
((variable . value)
(format #f "export ~a=\"~a\"" variable value)))
(evaluate-search-paths search-paths profile getenv))))
(define (display-search-paths entries profile)
"Display the search path environment variables that may need to be set for