Merge pull request #8369 from obsidiansystems/inductive-derived-path

Make the Derived Path family of types inductive for dynamic derivations

tests/build.sh

@@ -78,7 +78,7 @@ expectStderr 1 nix build --impure --expr 'with (import ./multiple-outputs.nix).e
   | grepQuiet "has 2 entries in its context. It should only have exactly one entry"
 
 nix build --impure --json --expr 'builtins.unsafeDiscardOutputDependency (import ./multiple-outputs.nix).e.a_a.drvPath' --no-link | jq --exit-status '
-  (.[0] | .path | match(".*multiple-outputs-e.drv"))
+  (.[0] | match(".*multiple-outputs-e.drv"))
 '
 
 # Test building from raw store path to drv not expression.

tests/dyn-drv/build-built-drv.sh

@@ -0,0 +1,21 @@
+#!/usr/bin/env bash
+
+source common.sh
+
+# In the corresponding nix file, we have two derivations: the first, named `hello`,
+# 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 `hello`, but only to the path of the drv file. For this reason,
+# we only need to:
+#
+# - instantiate `hello`
+# - build `producingDrv`
+# - check that the path of the output coincides with that of the original derivation
+
+out1=$(nix build -f ./text-hashed-output.nix hello --no-link)
+
+clearStore
+
+drvDep=$(nix-instantiate ./text-hashed-output.nix -A producingDrv)
+
+expectStderr 1 nix build "${drvDep}^out^out" --no-link | grepQuiet "Building dynamic derivations in one shot is not yet implemented"

tests/dyn-drv/local.mk

@@ -1,6 +1,7 @@
 dyn-drv-tests := \
   $(d)/text-hashed-output.sh \
-  $(d)/recursive-mod-json.sh
+  $(d)/recursive-mod-json.sh \
+  $(d)/build-built-drv.sh
 
 install-tests-groups += dyn-drv
 

tests/test-libstoreconsumer/main.cc

@@ -23,7 +23,7 @@ int main (int argc, char **argv)
 
         std::vector<DerivedPath> paths {
             DerivedPath::Built {
-                .drvPath = store->parseStorePath(drvPath),
+                .drvPath = makeConstantStorePathRef(store->parseStorePath(drvPath)),
                 .outputs = OutputsSpec::Names{"out"}
             }
         };