Add workaround for cargo-nextest bug

CHANGELOG.md

@@ -14,6 +14,7 @@ and this project adheres to [Semantic Versioning](http://semver.org/spec/v2.0.0.
   `Cargo.lock` is exactly what is expected (without implicit changes at build
   time) but this may end up rejecting builds which were previously passing. To
   get the old behavior back, set `cargoExtraArgs = "";`
+* Fixed a bug when testing proc macro crates with `cargoNextest` on macO. ([#376](https://github.com/ipetkov/crane/pull/376))
 
 ## [0.13.1] - 2023-08-22
 

checks/default.nix

@@ -330,6 +330,10 @@ in
 
   nextest = callPackage ./nextest.nix { };
 
+  procMacro = myLib.buildPackage {
+    src = myLib.cleanCargoSource ./proc-macro;
+  };
+
   simple = myLib.buildPackage {
     src = myLib.cleanCargoSource ./simple;
   };

checks/nextest.nix

@@ -24,13 +24,20 @@ let
     partitionType = "hash";
     cargoArtifacts = null;
   };
+
+  nextestProcMacro = cargoNextest {
+    src = ./proc-macro;
+    pname = "nextest-proc-macro";
+    cargoArtifacts = null;
+  };
 in
 runCommand "nextestTests"
 {
   buildInputs = [
     nextestSimple
     nextestPartitionsCount
     nextestPartitionsHash
+    nextestProcMacro
   ];
 } ''
   mkdir -p $out

checks/proc-macro/Cargo.toml

@@ -0,0 +1,7 @@
+[package]
+name = "my-proc-macro"
+version = "0.1.0"
+edition = "2021"
+
+[lib]
+proc-macro = true

checks/proc-macro/src/lib.rs

@@ -0,0 +1,6 @@
+use proc_macro::TokenStream;
+
+#[proc_macro_attribute]
+pub fn identity(_attr: TokenStream, item: TokenStream) -> TokenStream {
+    item
+}

lib/cargoNextest.nix

@@ -1,5 +1,7 @@
 { cargo-nextest
+, rustc
 , lib
+, stdenv
 , mkCargoDerivation
 , runCommand
 }:
@@ -30,6 +32,11 @@ let
       cargo nextest --version
     '';
 
+    # Work around Nextest bug: https://github.com/nextest-rs/nextest/issues/267
+    preCheck = (args.preCheck or "") + lib.optionalString stdenv.isDarwin ''
+      export DYLD_FALLBACK_LIBRARY_PATH=$(${rustc}/bin/rustc --print sysroot)/lib
+    '';
+
     checkPhaseCargoCommand = "cargo nextest ${cmd} $" + "{CARGO_PROFILE:+--cargo-profile $CARGO_PROFILE} ${cargoExtraArgs} ${cargoNextestExtraArgs} ${moreArgs}";
 
     nativeBuildInputs = (args.nativeBuildInputs or [ ]) ++ [ cargo-nextest ];