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authorLudovic Courtès <ludo@gnu.org>2022-03-16 15:03:01 +0100
committerLudovic Courtès <ludo@gnu.org>2022-03-16 15:48:52 +0100
commit47960b55268220ca1cb7d2fed41c53873181d816 (patch)
treea0ca790a00c22231eabc008d6cf3f5fa60830c5f /gnu
parent5d4af22ef21b71556e0f9a2ddc2d33366858813b (diff)
system: Improve 'read-boot-parameters' incompatibility diagnostic.
Previously, when reading an incompatible "parameters" file, 'guix system' would print a warning and then crash with a wrong-type-arg backtrace because code expects 'read-boot-parameters' to always return a <boot-parameters> record. * gnu/system.scm (read-boot-parameters): Upon incompatibility, raise an error instead of returning #f. Also raise a '&fix-hint' condition. * tests/boot-parameters.scm ("read, construction, mandatory fields"): Define 'test-read-boot-parameters' as a macro; expect 'formatted-message?' exceptions rather than #f returns.
Diffstat (limited to 'gnu')
-rw-r--r--gnu/system.scm19
1 files changed, 15 insertions, 4 deletions
diff --git a/gnu/system.scm b/gnu/system.scm
index dc980312ab..59b3dea93c 100644
--- a/gnu/system.scm
+++ b/gnu/system.scm
@@ -354,7 +354,7 @@ file system labels."
(define (read-boot-parameters port)
"Read boot parameters from PORT and return the corresponding
-<boot-parameters> object or #f if the format is unrecognized."
+<boot-parameters> object. Raise an error if the format is unrecognized."
(define device-sexp->device
(match-lambda
(('uuid (? symbol? type) (? bytevector? bv))
@@ -481,9 +481,20 @@ file system labels."
(_ ;the old format
"/")))))
(x ;unsupported format
- (warning (G_ "unrecognized boot parameters at '~a'~%")
- (port-filename port))
- #f)))
+ (raise
+ (make-compound-condition
+ (formatted-message
+ (G_ "unrecognized boot parameters at '~a'~%")
+ (port-filename port))
+ (condition
+ (&fix-hint (hint (format #f (G_ "This probably means that this version
+of Guix is older than the one that created @file{~a}. To address this, you
+need to update Guix:
+
+@example
+guix pull
+@end example")
+ (port-filename port))))))))))
(define (read-boot-parameters-file system)
"Read boot parameters from SYSTEM's (system or generation) \"parameters\"