Introduce allowedRequisites feature

3 files changed, 57 insertions, 1 deletions

diff --git a/tests/check-reqs.nix b/tests/check-reqs.nix
new file mode 100644
index 000000000000..5af8ea6fa185
--- /dev/null
+++ b/tests/check-reqs.nix
@@ -0,0 +1,43 @@
+with import ./config.nix;
+
+rec {
+  dep1 = mkDerivation {
+    name = "check-reqs-dep1";
+    builder = builtins.toFile "builder.sh" "mkdir $out; touch $out/file1";
+  };
+
+  dep2 = mkDerivation {
+    name = "check-reqs-dep2";
+    builder = builtins.toFile "builder.sh" "mkdir $out; touch $out/file2";
+  };
+
+  deps = mkDerivation {
+    name = "check-reqs-deps";
+    dep1 = dep1;
+    dep2 = dep2;
+    builder = builtins.toFile "builder.sh" ''
+      mkdir $out
+      ln -s $dep1/file1 $out/file1
+      ln -s $dep2/file2 $out/file2
+    '';
+  };
+
+  makeTest = nr: allowreqs: mkDerivation {
+    name = "check-reqs-" + toString nr;
+    inherit deps;
+    builder = builtins.toFile "builder.sh" ''
+      mkdir $out
+      ln -s $deps $out/depdir1
+    '';
+    allowedRequisites = allowreqs;
+  };
+
+  # When specifying all the requisites, the build succeeds.
+  test1 = makeTest 1 [ dep1 dep2 deps ];
+
+  # But missing anything it fails.
+  test2 = makeTest 2 [ dep2 deps ];
+  test3 = makeTest 3 [ dep1 deps ];
+  test4 = makeTest 4 [ deps ];
+  test5 = makeTest 5 [];
+}
diff --git a/tests/check-reqs.sh b/tests/check-reqs.sh
new file mode 100644
index 000000000000..643c2d0cdc0d
--- /dev/null
+++ b/tests/check-reqs.sh
@@ -0,0 +1,12 @@
+source common.sh
+
+RESULT=$TEST_ROOT/result
+
+# test1 should succeed.
+nix-build -o $RESULT check-reqs.nix -A test1
+
+# test{2,3,4,5} should fail.
+(! nix-build -o $RESULT check-reqs.nix -A test2)
+(! nix-build -o $RESULT check-reqs.nix -A test3)
+(! nix-build -o $RESULT check-reqs.nix -A test4)
+(! nix-build -o $RESULT check-reqs.nix -A test5)
diff --git a/tests/local.mk b/tests/local.mk
index 65aa12637055..69a227495d94 100644
--- a/tests/local.mk
+++ b/tests/local.mk
@@ -10,7 +10,8 @@ nix_tests = \
   remote-store.sh export.sh export-graph.sh negative-caching.sh \
   binary-patching.sh timeout.sh secure-drv-outputs.sh nix-channel.sh \
   multiple-outputs.sh import-derivation.sh fetchurl.sh optimise-store.sh \
-  binary-cache.sh nix-profile.sh repair.sh dump-db.sh case-hack.sh
+  binary-cache.sh nix-profile.sh repair.sh dump-db.sh case-hack.sh \
+  check-reqs.sh
   # parallel.sh
 
 install-tests += $(foreach x, $(nix_tests), tests/$(x))