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substitutes: Log the failing queries.

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* guix/substitutes.scm (%debug?): New variable.
(handle-narinfo-response): Log the failing queries if the %debug? parameter is
set.
This commit is contained in:
Mathieu Othacehe 2022-12-28 15:19:29 +01:00
parent 62f9f34525
commit 8b665a4ff3
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1 changed files with 17 additions and 0 deletions
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17
guix/substitutes.scm
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@ -90,6 +90,16 @@ (define %narinfo-cache-directory
(string-append %state-directory "/substitute/cache"))
(string-append (cache-directory #:ensure? #f) "/substitute")))
(define %debug?
;; Enable debug mode by setting the GUIX_SUBSTITUTE_DEBUG environmnent
;; variable.
(make-parameter
(getenv "GUIX_SUBSTITUTE_DEBUG")))
(define-syntax-rule (debug fmt args ...)
(when (%debug?)
(format #t fmt args ...)))
(define (narinfo-cache-file cache-url path)
"Return the name of the local file that contains an entry for PATH. The
entry is stored in a sub-directory specific to CACHE-URL."
@ -224,6 +234,13 @@ (define (handle-narinfo-response request response port result)
(let* ((path (uri-path (request-uri request)))
(hash-part (basename
(string-drop-right path 8)))) ;drop ".narinfo"
;; Log the failing queries and indicate if it failed because the
;; narinfo is being baked.
(let ((baking?
(assoc-ref (response-headers response) 'x-baking)))
(debug "could not fetch ~a~a ~a~a~%"
url path code
(if baking? " (baking)" "")))
(if len
(get-bytevector-n port len)
(read-to-eof port))