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fetchTree: Require the flakes experimental feature for the URL syntax

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Eelco Dolstra 2023-10-17 14:52:34 +02:00
parent 4112dd1fc9
commit f62b5500ff
1 changed files with 9 additions and 0 deletions
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9
src/libexpr/primops/fetchTree.cc
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@ -148,6 +148,11 @@ static void fetchTree(
attrs.emplace("url", fixGitURL(url)); attrs.emplace("url", fixGitURL(url));
input = fetchers::Input::fromAttrs(std::move(attrs)); input = fetchers::Input::fromAttrs(std::move(attrs));
} else { } else {
if (!experimentalFeatureSettings.isEnabled(Xp::Flakes))
state.debugThrowLastTrace(EvalError({
.msg = hintfmt("passing a string argument to 'fetchTree' requires the 'flakes' experimental feature"),
.errPos = state.positions[pos]
}));
input = fetchers::Input::fromURL(url); input = fetchers::Input::fromURL(url);
} }
} }
@ -180,6 +185,10 @@ static RegisterPrimOp primop_fetchTree({
*input* must be a [flake reference](@docroot@/command-ref/new-cli/nix3-flake.md#flake-references), either in attribute set representation or in the URL-like syntax. *input* must be a [flake reference](@docroot@/command-ref/new-cli/nix3-flake.md#flake-references), either in attribute set representation or in the URL-like syntax.
The input should be "locked", that is, it should contain a commit hash or content hash unless impure evaluation (`--impure`) is enabled. The input should be "locked", that is, it should contain a commit hash or content hash unless impure evaluation (`--impure`) is enabled.
> **Note**
>
> The URL-like syntax requires the [`flakes` experimental feature](@docroot@/contributing/experimental-features.md#xp-feature-flakes) to be enabled.
Here are some examples of how to use `fetchTree`: Here are some examples of how to use `fetchTree`:
- Fetch a GitHub repository using the attribute set representation: - Fetch a GitHub repository using the attribute set representation: