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Mark fetchTree as unstable again

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As discussed in our last meeting, we need a bit more time, but we are
"time boxing" the work left to do to ensure there is not unbounded
delay.

Rather than putting it back underneath `flakes`, though, put it
underneath its own `fetch-tree` experimental feature (which `flakes`
includes/implies). This signals our commitment to the plan to stabilize
it first without waiting to go through the rest of Flakes, and also will
give users a "release candidate" when we get closer to stabilization.

This reverts commit 4112dd1fc9.
This commit is contained in:
John Ericson 2023-11-08 23:08:05 -05:00
parent d854e8696b
commit f0adb72c23
6 changed files with 27 additions and 4 deletions
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15
src/libutil/experimental-features.cc
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@ -74,6 +74,21 @@ constexpr std::array<ExperimentalFeatureDetails, numXpFeatures> xpFeatureDetails
flake`](@docroot@/command-ref/new-cli/nix3-flake.md) for details.
)",
},
{
.tag = Xp::FetchTree,
.name = "fetch-tree",
.description = R"(
Enable the use of the [`fetchTree`](@docroot@/language/builtins.md#builtins-fetchTree) built-in function in the Nix language.
`fetchTree` exposes a larger suite of fetching functionality in a more systematic way.
The same fetching functionality is always used for for
[`flakes`](#xp-feature-flakes).
This built-in was previously guarded by the `flakes` experimental feature because of that overlap,
but since the plan is to work on stabilizing this first (due 2024 Q1), we are putting it underneath a separate feature.
Once we've made the changes we want to make, enabling just this feature will serve as a "release candidate" --- allowing users to try out the functionality we want to stabilize and not any other functionality we don't yet want to, in isolation.
)",
},
{
.tag = Xp::NixCommand,
.name = "nix-command",