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Allow tarball URLs to redirect to a lockable immutable URL

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Previously, for tarball flakes, we recorded the original URL of the
tarball flake, rather than the URL to which it ultimately
redirects. Thus, a flake URL like
http://example.org/patchelf-latest.tar that redirects to
http://example.org/patchelf-<revision>.tar was not really usable. We
couldn't record the redirected URL, because sites like GitHub redirect
to CDN URLs that we can't rely on to be stable.

So now we use the redirected URL only if the server returns the
`x-nix-is-immutable` or `x-amz-meta-nix-is-immutable` headers in its
response.

(cherry picked from commit 1ad3328c5e)
This commit is contained in:
Eelco Dolstra 2023-06-07 14:26:30 +02:00
parent 8ce966ee00
commit 114ba0e363
11 changed files with 177 additions and 30 deletions
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2
flake.nix
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@ -590,6 +590,8 @@
tests.sourcehutFlakes = runNixOSTestFor "x86_64-linux" ./tests/nixos/sourcehut-flakes.nix;
tests.tarballFlakes = runNixOSTestFor "x86_64-linux" ./tests/nixos/tarball-flakes.nix;
tests.containers = runNixOSTestFor "x86_64-linux" ./tests/nixos/containers/containers.nix;
tests.setuid = lib.genAttrs