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Warn about the use of channel URLs

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This commit is contained in:
Eelco Dolstra 2025-04-25 11:22:21 +02:00
parent 6468ece640
commit 17a40e5195
1 changed files with 8 additions and 3 deletions
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9
src/libexpr/eval-settings.cc
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@ -84,9 +84,14 @@ bool EvalSettings::isPseudoUrl(std::string_view s)
std::string EvalSettings::resolvePseudoUrl(std::string_view url) std::string EvalSettings::resolvePseudoUrl(std::string_view url)
{ {
if (hasPrefix(url, "channel:")) if (hasPrefix(url, "channel:")) {
static bool haveWarned = false;
warnOnce(haveWarned,
"Channels are deprecated in favor of flakes in Determinate Nix. "
"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.");
return "https://nixos.org/channels/" + std::string(url.substr(8)) + "/nixexprs.tar.xz"; return "https://nixos.org/channels/" + std::string(url.substr(8)) + "/nixexprs.tar.xz";
else } else
return std::string(url); return std::string(url);
} }