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lib/types: add pathInStore

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This commit is contained in:
Naïm Favier 2023-06-12 13:02:00 +02:00
parent 2e7efc14f2
commit 14d3e5685a
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2 changed files with 14 additions and 0 deletions
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9
lib/types.nix
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@ -461,6 +461,7 @@ rec {
# - strings with context, e.g. "${pkgs.foo}" or (toString pkgs.foo) # - strings with context, e.g. "${pkgs.foo}" or (toString pkgs.foo)
# - hardcoded store path literals (/nix/store/hash-foo) or strings without context # - hardcoded store path literals (/nix/store/hash-foo) or strings without context
# ("/nix/store/hash-foo"). These get a context added to them using builtins.storePath. # ("/nix/store/hash-foo"). These get a context added to them using builtins.storePath.
# If you don't need a *top-level* store path, consider using pathInStore instead.
package = mkOptionType { package = mkOptionType {
name = "package"; name = "package";
descriptionClass = "noun"; descriptionClass = "noun";
@ -491,6 +492,14 @@ rec {
merge = mergeEqualOption; merge = mergeEqualOption;
}; };
pathInStore = mkOptionType {
name = "pathInStore";
description = "path in the Nix store";
descriptionClass = "noun";
check = x: isStringLike x && builtins.match "${builtins.storeDir}/[^.].*" (toString x) != null;
merge = mergeEqualOption;
};
listOf = elemType: mkOptionType rec { listOf = elemType: mkOptionType rec {
name = "listOf"; name = "listOf";
description = "list of ${optionDescriptionPhrase (class: class == "noun" || class == "composite") elemType}"; description = "list of ${optionDescriptionPhrase (class: class == "noun" || class == "composite") elemType}";

5
nixos/doc/manual/development/option-types.section.md
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@ -20,6 +20,11 @@ merging is handled.
coerced to a string. Even if derivations can be considered as coerced to a string. Even if derivations can be considered as
paths, the more specific `types.package` should be preferred. paths, the more specific `types.package` should be preferred.
`types.pathInStore`
: A path that is contained in the Nix store. This can be a top-level store
path like `pkgs.hello` or a descendant like `"${pkgs.hello}/bin/hello"`.
`types.package` `types.package`
: A top-level store path. This can be an attribute set pointing : A top-level store path. This can be an attribute set pointing