isStorePath
lib.isStorePath
Docs pulled from | This Revision | 10 minutes ago
Check whether a value x is a store path.
Inputs
x- 1. Function argument
Type
isStorePath :: a -> bool
Examples
lib.strings.isStorePath usage example
isStorePath "/nix/store/d945ibfx9x185xf04b890y4f9g3cbb63-python-2.7.11/bin/python"
=> false
isStorePath "/nix/store/d945ibfx9x185xf04b890y4f9g3cbb63-python-2.7.11"
=> true
isStorePath pkgs.python
=> true
isStorePath [] || isStorePath 42 || isStorePath {} || …
=> false
Noogle detected
Implementation
The following is the current implementation of this function.
isStorePath =
x:
if isStringLike x then
let
str = toString x;
in
substring 0 1 str == "/"
&& (
dirOf str == storeDir
# Match content‐addressed derivations, which _currently_ do not have a
# store directory prefix.
# This is a workaround for https://github.com/NixOS/nix/issues/12361
# which was needed during the experimental phase of ca-derivations and
# should be removed once the issue has been resolved.
|| builtins.match "/[0-9a-z]{52}" str != null
)
else
false;