diff options
| -rw-r--r-- | users/sterni/nix/fun/default.nix | 14 | ||||
| -rw-r--r-- | users/sterni/nix/fun/tests/default.nix | 29 |
2 files changed, 43 insertions, 0 deletions
diff --git a/users/sterni/nix/fun/default.nix b/users/sterni/nix/fun/default.nix index a32b70a62b..6b3541ed4c 100644 --- a/users/sterni/nix/fun/default.nix +++ b/users/sterni/nix/fun/default.nix @@ -26,6 +26,19 @@ let lrs = x: fs: builtins.foldl' (v: f: f v) x fs; + # Warning: cursed function + # + # Check if a function has an attribute + # set pattern with an ellipsis as its argument. + # + # s/o to puck for discovering that you could use + # builtins.toXML to introspect functions more than + # you should be able to in Nix. + hasEllipsis = f: + builtins.isFunction f && + builtins.match ".*<attrspat ellipsis=\"1\">.*" + (builtins.toXML f) != null; + in { @@ -41,5 +54,6 @@ in rls lr lrs + hasEllipsis ; } diff --git a/users/sterni/nix/fun/tests/default.nix b/users/sterni/nix/fun/tests/default.nix new file mode 100644 index 0000000000..6492554306 --- /dev/null +++ b/users/sterni/nix/fun/tests/default.nix @@ -0,0 +1,29 @@ +{ depot, ... }: + +let + inherit (depot.nix.runTestsuite) + runTestsuite + it + assertEq + ; + + inherit (depot.users.sterni.nix) + fun + ; + + hasEllipsisTests = it "checks fun.hasEllipsis" [ + (assertEq "Malicious string" false + (fun.hasEllipsis (builtins.toXML ({ foo, ... }: 12)))) + (assertEq "No function" false + (fun.hasEllipsis 23)) + (assertEq "No attribute set pattern" false + (fun.hasEllipsis (a: a + 2))) + (assertEq "No ellipsis" false + (fun.hasEllipsis ({ foo, bar }: foo + bar))) + (assertEq "Ellipsis" true + (fun.hasEllipsis ({ depot, pkgs, ... }: 42))) + ]; +in + runTestsuite "nix.fun" [ + hasEllipsisTests + ] |