diff options
Diffstat (limited to 'guix/scripts/package.scm')
| -rw-r--r-- | guix/scripts/package.scm | 66 |
1 files changed, 65 insertions, 1 deletions
diff --git a/guix/scripts/package.scm b/guix/scripts/package.scm index cea49a57f4..5eddb7defe 100644 --- a/guix/scripts/package.scm +++ b/guix/scripts/package.scm @@ -330,6 +330,53 @@ but ~a is available upstream~%") ((getaddrinfo-error ftp-error) #f) (else (apply throw key args)))))) +(define* (search-path-environment-variables packages profile + #:optional (getenv getenv)) + "Return environment variable definitions that may be needed for the use of +PACKAGES in PROFILE. Use GETENV to determine the current settings and report +only settings not already effective." + + ;; The search path info is not stored in the manifest. Thus, we infer the + ;; search paths from same-named packages found in the distro. + + (define package-in-manifest->package + (match-lambda + ((name version _ ...) + (match (append (find-packages-by-name name version) + (find-packages-by-name name)) + ((p _ ...) p) + (_ #f))))) + + (define search-path-definition + (match-lambda + (($ <search-path-specification> variable directories separator) + (let ((values (or (and=> (getenv variable) + (cut string-tokenize* <> separator)) + '())) + (directories (filter file-exists? + (map (cut string-append profile + "/" <>) + directories)))) + (if (every (cut member <> values) directories) + #f + (format #f "export ~a=\"~a\"" + variable + (string-join directories separator))))))) + + (let* ((packages (filter-map package-in-manifest->package packages)) + (search-paths (delete-duplicates + (append-map package-native-search-paths + packages)))) + (filter-map search-path-definition search-paths))) + +(define (display-search-paths packages profile) + "Display the search path environment variables that may need to be set for +PACKAGES, in the context of PROFILE." + (let ((settings (search-path-environment-variables packages profile))) + (unless (null? settings) + (format #t (_ "The following environment variable definitions may be needed:~%")) + (format #t "~{ ~a~%~}" settings)))) + ;;; ;;; Command-line options. @@ -354,6 +401,8 @@ Install, remove, or upgrade PACKAGES in a single transaction.\n")) -u, --upgrade[=REGEXP] upgrade all the installed packages matching REGEXP")) (display (_ " --roll-back roll back to the previous generation")) + (display (_ " + --search-paths display needed environment variable definitions")) (newline) (display (_ " -p, --profile=PROFILE use PROFILE instead of the user's default profile")) @@ -408,6 +457,9 @@ Install, remove, or upgrade PACKAGES in a single transaction.\n")) (option '("roll-back") #f #f (lambda (opt name arg result) (alist-cons 'roll-back? #t result))) + (option '("search-paths") #f #f + (lambda (opt name arg result) + (cons `(query search-paths) result))) (option '(#\p "profile") #t #f (lambda (opt name arg result) (alist-cons 'profile arg @@ -728,7 +780,9 @@ Install, remove, or upgrade PACKAGES in a single transaction.\n")) (build-derivations (%store) (list prof-drv))) (begin (switch-symlinks name prof) - (switch-symlinks profile name)))))))))) + (switch-symlinks profile name) + (display-search-paths packages + profile)))))))))) (define (process-query opts) ;; Process any query specified by OPTS. Return #t when a query was @@ -776,6 +830,16 @@ Install, remove, or upgrade PACKAGES in a single transaction.\n")) (for-each (cute package->recutils <> (current-output-port)) (find-packages-by-description regexp)) #t)) + + (('search-paths) + (let* ((manifest (profile-manifest profile)) + (packages (manifest-packages manifest)) + (settings (search-path-environment-variables packages + profile + (const #f)))) + (format #t "~{~a~%~}" settings) + #t)) + (_ #f)))) (let ((opts (parse-options))) |