Make tests/dyn-drv test dir

tests/dyn-drv/common.sh

@@ -0,0 +1,8 @@
+source ../common.sh
+
+# Need backend to support text-hashing too
+requireDaemonNewerThan "2.16.0pre20230419"
+
+enableFeatures "ca-derivations dynamic-derivations"
+
+restartDaemon

tests/dyn-drv/config.nix.in

@@ -0,0 +1 @@
+../config.nix.in

tests/dyn-drv/text-hashed-output.nix

@@ -0,0 +1,29 @@
+with import ./config.nix;
+
+# A simple content-addressed derivation.
+# The derivation can be arbitrarily modified by passing a different `seed`,
+# but the output will always be the same
+rec {
+  root = mkDerivation {
+    name = "text-hashed-root";
+    buildCommand = ''
+      set -x
+      echo "Building a CA derivation"
+      mkdir -p $out
+      echo "Hello World" > $out/hello
+    '';
+    __contentAddressed = true;
+    outputHashMode = "recursive";
+    outputHashAlgo = "sha256";
+  };
+  dependent = mkDerivation {
+    name = "text-hashed-root.drv";
+    buildCommand = ''
+      echo "Copying the derivation"
+      cp ${builtins.unsafeDiscardOutputDependency root.drvPath} $out
+    '';
+    __contentAddressed = true;
+    outputHashMode = "text";
+    outputHashAlgo = "sha256";
+  };
+}

tests/dyn-drv/text-hashed-output.sh

@@ -0,0 +1,26 @@
+#!/usr/bin/env bash
+
+source common.sh
+
+# In the corresponding nix file, we have two derivations: the first, named root,
+# is a normal recursive derivation, while the second, named dependent, has the
+# new outputHashMode "text". Note that in "dependent", we don't refer to the
+# build output of root, but only to the path of the drv file. For this reason,
+# we only need to:
+#
+# - instantiate the root derivation
+# - build the dependent derivation
+# - check that the path of the output coincides with that of the original derivation
+
+drv=$(nix-instantiate ./text-hashed-output.nix -A root)
+nix show-derivation "$drv"
+
+drvDep=$(nix-instantiate ./text-hashed-output.nix -A dependent)
+nix show-derivation "$drvDep"
+
+out1=$(nix-build ./text-hashed-output.nix -A dependent --no-out-link)
+
+nix path-info $drv --derivation --json | jq
+nix path-info $out1 --derivation --json | jq
+
+test $out1 == $drv