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-rw-r--r--guix/build/download.scm83
1 files changed, 73 insertions, 10 deletions
diff --git a/guix/build/download.scm b/guix/build/download.scm
index a22d4064ca..ce31038b05 100644
--- a/guix/build/download.scm
+++ b/guix/build/download.scm
@@ -2,6 +2,7 @@
;;; Copyright © 2012, 2013, 2014, 2015, 2016, 2017, 2018, 2019, 2020, 2021 Ludovic Courtès <ludo@gnu.org>
;;; Copyright © 2015 Mark H Weaver <mhw@netris.org>
;;; Copyright © 2017 Tobias Geerinckx-Rice <me@tobias.gr>
+;;; Copyright © 2021 Timothy Sample <samplet@ngyro.com>
;;;
;;; This file is part of GNU Guix.
;;;
@@ -34,6 +35,8 @@
#:use-module (srfi srfi-19)
#:use-module (srfi srfi-26)
#:autoload (ice-9 ftw) (scandir)
+ #:autoload (guix base16) (bytevector->base16-string)
+ #:autoload (guix swh) (swh-download-directory)
#:use-module (ice-9 match)
#:use-module (ice-9 format)
#:export (open-socket-for-uri
@@ -626,10 +629,53 @@ Return a list of URIs."
(else
(list uri))))
+(define* (disarchive-fetch/any uris file
+ #:key (timeout 10) (verify-certificate? #t))
+ "Fetch a Disarchive specification from any of URIS, assemble it,
+and write the output to FILE."
+ (define (fetch-specification uris)
+ (any (lambda (uri)
+ (false-if-exception*
+ (let-values (((port size) (http-fetch uri
+ #:verify-certificate?
+ verify-certificate?
+ #:timeout timeout)))
+ (let ((specification (read port)))
+ (close-port port)
+ specification))))
+ uris))
+
+ (define (resolve addresses output)
+ (any (match-lambda
+ (('swhid swhid)
+ (match (string-split swhid #\:)
+ (("swh" "1" "dir" id)
+ (format #t "Downloading ~a from Software Heritage...~%" file)
+ (false-if-exception*
+ (swh-download-directory id output)))
+ (_ #f)))
+ (_ #f))
+ addresses))
+
+ (format #t "Trying to use Disarchive to assemble ~a...~%" file)
+ (match (and=> (resolve-module '(disarchive) #:ensure #f)
+ (lambda (disarchive)
+ (cons (module-ref disarchive '%disarchive-log-port)
+ (module-ref disarchive 'disarchive-assemble))))
+ (#f
+ (format #t "could not load Disarchive~%"))
+ ((%disarchive-log-port . disarchive-assemble)
+ (match (fetch-specification uris)
+ (#f
+ (format #t "could not find its Disarchive specification~%"))
+ (spec (parameterize ((%disarchive-log-port (current-output-port)))
+ (disarchive-assemble spec file #:resolver resolve)))))))
+
(define* (url-fetch url file
#:key
(timeout 10) (verify-certificate? #t)
(mirrors '()) (content-addressed-mirrors '())
+ (disarchive-mirrors '())
(hashes '())
print-build-trace?)
"Fetch FILE from URL; URL may be either a single string, or a list of
@@ -693,6 +739,18 @@ otherwise simply ignore them."
hashes))
content-addressed-mirrors))
+ (define disarchive-uris
+ (append-map (match-lambda
+ ((? string? mirror)
+ (map (match-lambda
+ ((hash-algo . hash)
+ (string->uri
+ (string-append mirror
+ (symbol->string hash-algo) "/"
+ (bytevector->base16-string hash)))))
+ hashes)))
+ disarchive-mirrors))
+
;; Make this unbuffered so 'progress-report/file' works as expected. 'line
;; means '\n', not '\r', so it's not appropriate here.
(setvbuf (current-output-port) 'none)
@@ -705,15 +763,20 @@ otherwise simply ignore them."
(or (fetch uri file)
(try tail)))
(()
- (format (current-error-port) "failed to download ~s from ~s~%"
- file url)
-
- ;; Remove FILE in case we made an incomplete download, for example due
- ;; to ENOSPC.
- (catch 'system-error
- (lambda ()
- (delete-file file))
- (const #f))
- #f))))
+ ;; If we are looking for a software archive, one last thing we
+ ;; can try is to use Disarchive to assemble it.
+ (or (disarchive-fetch/any disarchive-uris file
+ #:verify-certificate? verify-certificate?
+ #:timeout timeout)
+ (begin
+ (format (current-error-port) "failed to download ~s from ~s~%"
+ file url)
+ ;; Remove FILE in case we made an incomplete download, for
+ ;; example due to ENOSPC.
+ (catch 'system-error
+ (lambda ()
+ (delete-file file))
+ (const #f))
+ #f))))))
;;; download.scm ends here