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Clarify the types of the arguments to and return value from the internal helper function `resolve-dependencies`. --- guix/build/node-build-system.scm | 53 ++++++++++++++++++++++---------- 1 file changed, 36 insertions(+), 17 deletions(-) diff --git a/guix/build/node-build-system.scm b/guix/build/node-build-system.scm index dcaa719f40..b74e593838 100644 --- a/guix/build/node-build-system.scm +++ b/guix/build/node-build-system.scm @@ -73,26 +73,45 @@ (define* (patch-dependencies #:key inputs #:allow-other-keys) (define index (index-modules (map cdr inputs))) - (define (resolve-dependencies package-meta meta-key) - (fold (lambda (key+value acc) - (match key+value - ('@ acc) - ((key . value) (acons key (hash-ref index key value) acc)))) - '() - (or (assoc-ref package-meta meta-key) '()))) + (define (resolve-dependencies meta-alist meta-key) + ;; Given: + ;; - The alist from "package.json", with the '@ unwrapped + ;; - A string key, like "dependencies" + ;; Returns: an alist (without a wrapping '@) like the entry in + ;; meta-alist for meta-key, but with dependencies supplied + ;; by Guix packages mapped to the absolute store paths to use. + (match (assoc-ref meta-alist meta-key) + (#f + '()) + (('@ . orig-deps) + (fold (match-lambda* + (((key . value) acc) + (acons key (hash-ref index key value) acc))) + '() + orig-deps)))) (with-atomic-file-replacement "package.json" (lambda (in out) - (let ((package-meta (read-json in))) - (assoc-set! package-meta "dependencies" - (append - '(@) - (resolve-dependencies package-meta "dependencies") - (resolve-dependencies package-meta "peerDependencies"))) - (assoc-set! package-meta "devDependencies" - (append - '(@) - (resolve-dependencies package-meta "devDependencies"))) + ;; It is unsafe to rely on 'assoc-set!' to update an + ;; existing assosciation list variable: + ;; see 'info "(guile)Adding or Setting Alist Entries"'. + (let* ((package-meta (read-json in)) + (alist (match package-meta + ((@ . alist) alist))) + (alist + (assoc-set! + alist "dependencies" + (append + '(@) + (resolve-dependencies alist "dependencies") + (resolve-dependencies alist "peerDependencies")))) + (alist + (assoc-set! + alist "devDependencies" + (append + '(@) + (resolve-dependencies alist "devDependencies")))) + (package-meta (cons '@ alist))) (write-json package-meta out)))) #t) -- 2.32.0