diff options
Diffstat (limited to 'nix/utils/default.nix')
| -rw-r--r-- | nix/utils/default.nix | 16 |
1 files changed, 16 insertions, 0 deletions
diff --git a/nix/utils/default.nix b/nix/utils/default.nix index 0c6c88fafd5a..a29f346519b8 100644 --- a/nix/utils/default.nix +++ b/nix/utils/default.nix @@ -43,6 +43,21 @@ let else builtins.throw "Don't know how to get (base)name of " + lib.generators.toPretty { } p; + /* Retrieves the drvPath attribute from a given derivation, but ensures that + the resulting string only depends on the `.drv` file in the nix store and + not on its realised outputs as well. + + Type: drv -> string + */ + onlyDrvPath = drv: + let + inherit (drv) drvPath; + unsafeDrvPath = builtins.unsafeDiscardStringContext drvPath; + in + builtins.appendContext unsafeDrvPath { + ${unsafeDrvPath} = { path = true; }; + }; + /* Query the type of a path exposing the same information as would be by `builtins.readDir`, but for a single, specific target path. @@ -152,6 +167,7 @@ in { inherit storePathName + onlyDrvPath pathType isDirectory isRegularFile |