diff options
Diffstat (limited to 'guix/build/download.scm')
| -rw-r--r-- | guix/build/download.scm | 26 |
1 files changed, 23 insertions, 3 deletions
diff --git a/guix/build/download.scm b/guix/build/download.scm index fec4cec3e8..824e1c354a 100644 --- a/guix/build/download.scm +++ b/guix/build/download.scm @@ -605,10 +605,22 @@ Return a list of URIs." (else (list uri)))) -(define* (url-fetch url file #:key (mirrors '())) +(define* (url-fetch url file + #:key + (mirrors '()) (content-addressed-mirrors '()) + (hashes '())) "Fetch FILE from URL; URL may be either a single string, or a list of string denoting alternate URLs for FILE. Return #f on failure, and FILE -on success." +on success. + +When MIRRORS is defined, it must be an alist of mirrors; it is used to resolve +'mirror://' URIs. + +HASHES must be a list of algorithm/hash pairs, where each algorithm is a +symbol such as 'sha256 and each hash is a bytevector. +CONTENT-ADDRESSED-MIRRORS must be a list of procedures that, given a hash +algorithm and a hash, return a URL where the specified data can be retrieved +or #f." (define uri (append-map (cut maybe-expand-mirrors <> mirrors) (match url @@ -628,13 +640,21 @@ on success." uri) #f))) + (define content-addressed-urls + (append-map (lambda (make-url) + (filter-map (match-lambda + ((hash-algo . hash) + (make-url hash-algo hash))) + hashes)) + content-addressed-mirrors)) + ;; Make this unbuffered so 'progress-proc' works as expected. _IOLBF means ;; '\n', not '\r', so it's not appropriate here. (setvbuf (current-output-port) _IONBF) (setvbuf (current-error-port) _IOLBF) - (let try ((uri uri)) + (let try ((uri (append uri content-addressed-urls))) (match uri ((uri tail ...) (or (fetch uri file) |