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Merge pull request #36 from DeterminateSystems/deprecate-channel-urls

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Warn about the use of channel URLs
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Eelco Dolstra 2025-04-25 15:01:32 +00:00 • committed by GitHub
commit 97487c58a1
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1 changed files with 12 additions and 4 deletions
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16
src/libexpr/eval-settings.cc
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@ -84,9 +84,17 @@ bool EvalSettings::isPseudoUrl(std::string_view s)
std::string EvalSettings::resolvePseudoUrl(std::string_view url)
{
if (hasPrefix(url, "channel:"))
return "https://nixos.org/channels/" + std::string(url.substr(8)) + "/nixexprs.tar.xz";
else
if (hasPrefix(url, "channel:")) {
auto realUrl = "https://nixos.org/channels/" + std::string(url.substr(8)) + "/nixexprs.tar.xz";
static bool haveWarned = false;
warnOnce(haveWarned,
"Channels are deprecated in favor of flakes in Determinate Nix. "
"Instead of '%s', use '%s'. "
"For a guide on Nix flakes, see: https://zero-to-nix.com/. "
"For details and to offer feedback on the deprecation process, see: https://github.com/DeterminateSystems/nix-src/issues/34.",
url, realUrl);
return realUrl;
} else
return std::string(url);
}
@ -103,4 +111,4 @@ Path getNixDefExpr()
: getHome() + "/.nix-defexpr";
}
} // namespace nix
} // namespace nix