Restore now-working build-remote-content-addressed-fixed test

This was

 - Added in dbf96e10ecc75410c9db798f208f8a8310842a4f.

 - Commented out in 07975979aae4e7729ae13ffeb7390d07d71ad4bd, which I
   believe only reached master by mistake.

 - Deleted in c32168c9bc161e0c9cea027853895971699510cb, when
   `tests/build-hook-ca.nix` was reused for a new test.

But the test works, and we ought to have it.

1 files changed, 53 insertions, 0 deletions

diff --git a/tests/build-hook-ca-floating.nix b/tests/build-hook-ca-floating.nix
new file mode 100644
index 000000000..67295985f
--- /dev/null
+++ b/tests/build-hook-ca-floating.nix
@@ -0,0 +1,53 @@
+{ busybox }:
+
+with import ./config.nix;
+
+let
+
+  mkDerivation = args:
+    derivation ({
+      inherit system;
+      builder = busybox;
+      args = ["sh" "-e" args.builder or (builtins.toFile "builder-${args.name}.sh" "if [ -e .attrs.sh ]; then source .attrs.sh; fi; eval \"$buildCommand\"")];
+      outputHashMode = "recursive";
+      outputHashAlgo = "sha256";
+      __contentAddressed = true;
+    } // removeAttrs args ["builder" "meta"])
+    // { meta = args.meta or {}; };
+
+  input1 = mkDerivation {
+    shell = busybox;
+    name = "build-remote-input-1";
+    buildCommand = "echo FOO > $out";
+    requiredSystemFeatures = ["foo"];
+  };
+
+  input2 = mkDerivation {
+    shell = busybox;
+    name = "build-remote-input-2";
+    buildCommand = "echo BAR > $out";
+    requiredSystemFeatures = ["bar"];
+  };
+
+  input3 = mkDerivation {
+    shell = busybox;
+    name = "build-remote-input-3";
+    buildCommand = ''
+      read x < ${input2}
+      echo $x BAZ > $out
+    '';
+    requiredSystemFeatures = ["baz"];
+  };
+
+in
+
+  mkDerivation {
+    shell = busybox;
+    name = "build-remote";
+    buildCommand =
+      ''
+        read x < ${input1}
+        read y < ${input3}
+        echo "$x $y" > $out
+      '';
+  }