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authorLudovic Courtès <ludo@gnu.org>2023-05-22 17:19:39 +0200
committerLudovic Courtès <ludo@gnu.org>2023-05-30 00:15:29 +0200
commit8af9a2aa5fa2fa5b00234c1cbe12e9aff60888a0 (patch)
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parentd23d8fcee99e7b127f9e649925caca9cf0d36e76 (diff)
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substitute: If a server's nar URL is 404, try the next one(s).
If a substitute server advertises in its narinfo, for example, both a /zstd and a /lzip URL but the /zstd URL is unreachable, try the /lzip URL. Fixes <https://issues.guix.gnu.org/63634>. * guix/narinfo.scm (narinfo-preferred-uris): New procedure. (narinfo-best-uri): Rebase on top of it. * guix/scripts/substitute.scm (download-nar)[try-fetch]: New procedure. Use 'narinfo-preferred-uris' and 'try-fetch' to attempt all the URLs of NARINFO. * tests/substitute.scm (request-substitution): Remove 'parameterize'. Delete DESTINATION. ("substitute, preferred nar URL is 404, other is 200"): New test.
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