Attempt make reference happ deps reproducible

nix/buildDepsOnlyWithArtifacts.nix

@@ -0,0 +1,56 @@
+{ crateNameFromCargoToml, lib, mkCargoDerivation, mkDummySrc, vendorCargoDeps }:
+
+{ cargoBuildCommand ? "cargoWithProfile build"
+, cargoCheckCommand ? "cargoWithProfile check", cargoExtraArgs ? "--locked"
+, cargoTestCommand ? "cargoWithProfile test", cargoTestExtraArgs ? "--no-run"
+, ... }@args:
+let
+  crateName = crateNameFromCargoToml args;
+  cleanedArgs = builtins.removeAttrs args [
+    "cargoBuildCommand"
+    "cargoCheckCommand"
+    "cargoCheckExtraArgs"
+    "cargoExtraArgs"
+    "cargoTestCommand"
+    "cargoTestExtraArgs"
+    "outputHashes"
+    "dummySrc"
+    "outputs"
+  ];
+
+  # Run tests by default to ensure we cache any dev-dependencies
+  doCheck = args.doCheck or true;
+
+  cargoCheckExtraArgs =
+    args.cargoCheckExtraArgs or (if doCheck then "--all-targets" else "");
+
+  dummySrc = if args ? dummySrc then
+    lib.warnIf (args ? src && args.src != null)
+    "buildDepsOnly will ignore `src` when `dummySrc` is specified" args.dummySrc
+  else
+    mkDummySrc args;
+in mkCargoDerivation (cleanedArgs // {
+  inherit doCheck;
+
+  src = dummySrc;
+  pnameSuffix = "-deps";
+  pname = args.pname or crateName.pname;
+  version = args.version or crateName.version;
+
+  cargoVendorDir = args.cargoVendorDir or (vendorCargoDeps args);
+
+  # First we run `cargo check` to cache cargo's internal artifacts, fingerprints, etc. for all deps.
+  # Then we run `cargo build` to actually compile the deps and cache the results
+  buildPhaseCargoCommand = args.buildPhaseCargoCommand or ''
+    ${cargoCheckCommand} ${cargoExtraArgs} ${cargoCheckExtraArgs}
+    ${cargoBuildCommand} ${cargoExtraArgs}
+  '';
+
+  checkPhaseCargoCommand = args.checkPhaseCargoCommand or ''
+    ${cargoTestCommand} ${cargoExtraArgs} ${cargoTestExtraArgs}
+  '';
+
+  # No point in building this if not for the cargo artifacts
+  doInstallCargoArtifacts = true;
+})
+

nix/fixtures/module-repo/Cargo.toml

@@ -6,7 +6,7 @@ resolver = "2"
 hdi = "0.4.1-rc"
 hdk = "0.3.1-rc"
 holochain = "0.3.1-rc"
-serde = "1"
+serde = "1.0.197"
 
 [profile.release]
 opt-level = "z"

nix/fixtures/module-repo/ui/package.json

@@ -6,7 +6,7 @@
     "start": "node index.js"
   },
   "dependencies": {
-    "@holochain-open-dev/profiles": "github:holochain-open-dev/profiles#7dc05a2c5e681fb32d3faef5be297f14cf3d7402&path:ui"
+    "@holochain-open-dev/profiles": "github:holochain-open-dev/profiles#f95cd9b627a308dcac016b47df960dbb24b741b8&path:ui"
   },
   "exports": {
     ".": "./index.js"