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libfetchers/tarball: Lock on effectiveUrl

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Basically, if a tarball URL is used as a flake input, and the URL leads
to a redirect, the final redirect destination would be recorded as the
locked URL.

This allows tarballs under https://nixos.org/channels to be used as
flake inputs. If we, as before, lock on to the original URL it would
break every time the channel updates.
This commit is contained in:
dramforever 2021-03-02 21:56:50 +08:00
parent e64cf8e0a3
commit fc6bfb261d
3 changed files with 24 additions and 9 deletions
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8
src/libfetchers/fetchers.hh
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@ -145,7 +145,13 @@ DownloadFileResult downloadFile(
bool immutable,
const Headers & headers = {});
std::pair<Tree, time_t> downloadTarball(
struct DownloadTarballMeta
{
time_t lastModified;
std::string effectiveUrl;
};
std::pair<Tree, DownloadTarballMeta> downloadTarball(
ref<Store> store,
const std::string & url,
const std::string & name,