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authorLudovic Courtès <ludo@gnu.org>2020-11-05 14:52:29 +0100
committerLudovic Courtès <ludo@gnu.org>2020-11-05 16:13:50 +0100
commitca465a9c8454289b7aded22719cd5d919e441780 (patch)
tree4b0eb37a79eacd5df06157dbf6df99cd9d493141 /guix/gexp.scm
parent18fc84bce86eedb85d44a8708a9a5ef7c1b23da5 (diff)
gexp: Warn when importing (guix config) or (ice-9 …).
While importing those modules from the host system is valid, it is often a mistake that introduces non-reproducibility. This patch prints a warning when that happens. * guix/gexp.scm (gexp-attribute): Add #:validate parameter and honor it. (gexp-modules)[validate-modules]: New procedure. Pass it to 'gexp-attribute'. * tests/gexp.scm ("gexp-modules, warning"): New test.
Diffstat (limited to 'guix/gexp.scm')
-rw-r--r--guix/gexp.scm41
1 files changed, 32 insertions, 9 deletions
diff --git a/guix/gexp.scm b/guix/gexp.scm
index 97a6101868..051831238e 100644
--- a/guix/gexp.scm
+++ b/guix/gexp.scm
@@ -35,6 +35,7 @@
#:use-module (srfi srfi-26)
#:use-module (srfi srfi-34)
#:use-module (srfi srfi-35)
+ #:use-module (ice-9 format)
#:use-module (ice-9 match)
#:export (gexp
gexp?
@@ -747,22 +748,26 @@ whether this should be considered a \"native\" input or not."
(set-record-type-printer! <gexp-output> write-gexp-output)
-(define* (gexp-attribute gexp self-attribute #:optional (equal? equal?))
+(define* (gexp-attribute gexp self-attribute #:optional (equal? equal?)
+ #:key (validate (const #t)))
"Recurse on GEXP and the expressions it refers to, summing the items
returned by SELF-ATTRIBUTE, a procedure that takes a gexp. Use EQUAL? as the
-second argument to 'delete-duplicates'."
+second argument to 'delete-duplicates'. Pass VALIDATE every gexp and
+attribute that is traversed."
(if (gexp? gexp)
(delete-duplicates
- (append (self-attribute gexp)
+ (append (let ((attribute (self-attribute gexp)))
+ (validate gexp attribute)
+ attribute)
(append-map (match-lambda
(($ <gexp-input> (? gexp? exp))
- (gexp-attribute exp self-attribute))
+ (gexp-attribute exp self-attribute
+ #:validate validate))
(($ <gexp-input> (lst ...))
(append-map (lambda (item)
- (if (gexp? item)
- (gexp-attribute item
- self-attribute)
- '()))
+ (gexp-attribute item self-attribute
+ #:validate
+ validate))
lst))
(_
'()))
@@ -788,7 +793,25 @@ false, meaning that GEXP is a plain Scheme object, return the empty list."
(_
(equal? m1 m2))))
- (gexp-attribute gexp gexp-self-modules module=?))
+ (define (validate-modules gexp modules)
+ ;; Warn if MODULES, imported by GEXP, contains modules that in general
+ ;; should not be imported from the host because they vary from user to
+ ;; user and may thus be a source of non-reproducibility. This includes
+ ;; (guix config) as well as modules that come with Guile.
+ (match (filter (match-lambda
+ ((or ('guix 'config) ('ice-9 . _)) #t)
+ (_ #f))
+ modules)
+ (() #t)
+ (suspects
+ (warning (gexp-location gexp)
+ (N_ "importing module~{ ~a~} from the host~%"
+ "importing modules~{ ~a~} from the host~%"
+ (length suspects))
+ suspects))))
+
+ (gexp-attribute gexp gexp-self-modules module=?
+ #:validate validate-modules))
(define (gexp-extensions gexp)
"Return the list of Guile extensions (packages) GEXP relies on. If (gexp?