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add cross-references to nix-path overriding (#11288)

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* add cross-references to `nix-path` overriding

while this information is already present in the settings, it's more
likely to be first accessed through the "lookup path" page, which
currently requires following two links to get to the practically
important bits.

Co-authored-by: Robert Hensing <roberth@users.noreply.github.com>
This commit is contained in:
Valentin Gagarin 2024-08-13 19:22:32 +02:00 committed by GitHub
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commit 4956e7c44c
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2 changed files with 6 additions and 6 deletions
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7
doc/manual/src/language/constructs/lookup-path.md
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@ -4,11 +4,8 @@
>
> *lookup-path* = `<` *identifier* [ `/` *identifier* ]... `>`
A lookup path is an identifier with an optional path suffix that resolves to a [path value](@docroot@/language/types.md#type-path) if the identifier matches a search path entry.
The value of a lookup path is determined by [`builtins.nixPath`](@docroot@/language/builtins.md#builtins-nixPath).
See [`builtins.findFile`](@docroot@/language/builtins.md#builtins-findFile) for details on lookup path resolution.
A lookup path is an identifier with an optional path suffix that resolves to a [path value](@docroot@/language/types.md#type-path) if the identifier matches a search path entry in [`builtins.nixPath`](@docroot@/language/builtins.md#builtins-nixPath).
The algorithm for lookup path resolution is described in the documentation on [`builtins.findFile`](@docroot@/language/builtins.md#builtins-findFile).
> **Example**
>

5
src/libexpr/primops.cc
View file

@ -4857,7 +4857,10 @@ void EvalState::createBaseEnv()
addConstant("__nixPath", v, {
.type = nList,
.doc = R"(
The value of the [`nix-path` configuration setting](@docroot@/command-ref/conf-file.md#conf-nix-path): a list of search path entries used to resolve [lookup paths](@docroot@/language/constructs/lookup-path.md).
A list of search path entries used to resolve [lookup paths](@docroot@/language/constructs/lookup-path.md).
Its value is primarily determined by the [`nix-path` configuration setting](@docroot@/command-ref/conf-file.md#conf-nix-path), which are
- Overridden by the [`NIX_PATH`](@docroot@/command-ref/env-common.md#env-NIX_PATH) environment variable or the `--nix-path` option
- Extended by the [`-I` option](@docroot@/command-ref/opt-common.md#opt-I) or `--extra-nix-path`
> **Example**
>