From 36754eee28187b41e9a6ef15cd3c9911449a4e8d Mon Sep 17 00:00:00 2001 From: =?UTF-8?q?Ludovic=20Court=C3=A8s?= Date: Fri, 15 Feb 2019 22:58:29 +0100 Subject: packages: Remove duplicates from package cache. Previously the same package could appear several times if several variables were bound to it, as is notably the case for "python" currently. This, in turn, would lead to obnoxious "ambiguous package specification" messages. * gnu/packages.scm (generate-package-cache)[expand-cache]: Change RESULT to RESULT+SEEN and adjust accordingly. Call 'first' on the result of 'fold-module-public-variables*'. * tests/packages.scm ("fold-available-packages with/without cache"): Check for lack of duplicates in FROM-CACHE. --- gnu/packages.scm | 53 ++++++++++++++++++++++++++++++----------------------- 1 file changed, 30 insertions(+), 23 deletions(-) (limited to 'gnu/packages.scm') diff --git a/gnu/packages.scm b/gnu/packages.scm index a1814205f9..7b17e70c53 100644 --- a/gnu/packages.scm +++ b/gnu/packages.scm @@ -371,34 +371,41 @@ reducing the memory footprint." (define cache-file (string-append directory %package-cache-file)) - (define (expand-cache module symbol variable result) + (define (expand-cache module symbol variable result+seen) (match (false-if-exception (variable-ref variable)) ((? package? package) - (if (hidden-package? package) - result - (cons `#(,(package-name package) - ,(package-version package) - ,(module-name module) - ,symbol - ,(package-outputs package) - ,(->bool (member (%current-system) - (package-supported-systems package))) - ,(->bool (package-superseded package)) - ,@(let ((loc (package-location package))) - (if loc - `(,(location-file loc) - ,(location-line loc) - ,(location-column loc)) - '(#f #f #f)))) - result))) + (match result+seen + ((result . seen) + (if (or (vhash-assq package seen) + (hidden-package? package)) + (cons result seen) + (cons (cons `#(,(package-name package) + ,(package-version package) + ,(module-name module) + ,symbol + ,(package-outputs package) + ,(->bool + (member (%current-system) + (package-supported-systems package))) + ,(->bool (package-superseded package)) + ,@(let ((loc (package-location package))) + (if loc + `(,(location-file loc) + ,(location-line loc) + ,(location-column loc)) + '(#f #f #f)))) + result) + (vhash-consq package #t seen)))))) (_ - result))) + result+seen))) (define exp - (fold-module-public-variables* expand-cache '() - (all-modules (%package-module-path) - #:warn - warn-about-load-error))) + (first + (fold-module-public-variables* expand-cache + (cons '() vlist-null) + (all-modules (%package-module-path) + #:warn + warn-about-load-error)))) (mkdir-p (dirname cache-file)) (call-with-output-file cache-file -- cgit v1.2.3