fix used vars with run dependencies

docs/reference/recipe_file.md

@@ -595,7 +595,7 @@ In the following example you can see the implicitly added runtime dependencies.
       # - libzlib      <-- implicitly added by libzlib
 ```
 
-  
+
 ### Ignore run exports
 
 There maybe cases where an upstream package has a problematic `run_exports` constraint.

src/variant_config.rs

@@ -405,7 +405,7 @@ impl VariantConfig {
 
             let noarch_type = parsed_recipe.build().noarch();
             // add in any host and build dependencies
-            used_vars.extend(parsed_recipe.requirements().all().filter_map(|dep| {
+            used_vars.extend(parsed_recipe.requirements().build_time().filter_map(|dep| {
                 match dep {
                     Dependency::Spec(spec) => {
                         // here we filter python as a variant and don't take it's passed variants
@@ -418,13 +418,22 @@ impl VariantConfig {
                             normalized_name.to_string().into()
                         })
                     }
-                    Dependency::PinSubpackage(pin) => {
-                        Some(pin.pin_value().name.as_normalized().to_string())
-                    }
                     _ => None,
                 }
             }));
 
+            used_vars.extend(
+                parsed_recipe
+                    .requirements()
+                    .all()
+                    .filter_map(|dep| match dep {
+                        Dependency::PinSubpackage(pin) => {
+                            Some(pin.pin_value().name.as_normalized().to_string())
+                        }
+                        _ => None,
+                    }),
+            );
+
             let use_keys = &parsed_recipe.build().variant().use_keys;
             used_vars.extend(use_keys.iter().cloned());
 
@@ -519,10 +528,8 @@ impl VariantConfig {
                     errs
                 })?;
             let noarch_type = parsed_recipe.build().noarch();
-            let build_time_requirements = parsed_recipe
-                .build_time_requirements()
-                .cloned()
-                .filter_map(|dep| {
+            let build_time_requirements =
+                parsed_recipe.build_time_requirements().filter_map(|dep| {
                     // here we filter python as a variant and don't take it's passed variants
                     // when noarch is python
                     if let Dependency::Spec(spec) = &dep {
@@ -532,7 +539,7 @@ impl VariantConfig {
                             }
                         }
                     }
-                    Some(dep)
+                    Some(dep.clone())
                 });
             all_build_dependencies.extend(build_time_requirements);
         }
@@ -620,15 +627,19 @@ impl VariantConfig {
                     })?;
 
                 // find the variables that were actually used in the recipe and that count towards the hash
+                parsed_recipe.build_time_requirements().for_each(|dep| {
+                    if let Dependency::Spec(spec) = dep {
+                        if let Some(name) = &spec.name {
+                            let val = name.as_normalized().to_owned();
+                            used_variables.insert(val);
+                        }
+                    }
+                });
+
                 parsed_recipe
-                    .build_time_requirements()
+                    .requirements()
+                    .all()
                     .for_each(|dep| match dep {
-                        Dependency::Spec(spec) => {
-                            if let Some(name) = &spec.name {
-                                let val = name.as_normalized().to_owned();
-                                used_variables.insert(val);
-                            }
-                        }
                         Dependency::PinSubpackage(pin_sub) => {
                             let pin = pin_sub.pin_value();
                             let val = pin.name.as_normalized().to_owned();
@@ -643,6 +654,7 @@ impl VariantConfig {
                                 exact_pins.insert(val);
                             }
                         }
+                        _ => {}
                     });
 
                 // actually used vars

test-data/recipes/cache_run_exports/recipe_test_1.yaml

@@ -20,4 +20,4 @@ outputs:
     requirements:
       ignore_run_exports:
         by_name:
-          - normal-run-exports
+          - normal-run-exports

test-data/recipes/cache_run_exports/recipe_test_3.yaml

@@ -9,4 +9,4 @@ cache:
 outputs:
   - package:
       name: cache-ignore-run-exports-by-name
-      version: "1.0.0"
+      version: "1.0.0"

test-data/recipes/used-vars/recipe_1.yaml

@@ -0,0 +1,12 @@
+package:
+  name: used-vars-1
+  version: "0.1.0"
+
+build:
+  noarch: python
+
+requirements:
+  build:
+    - python
+  run:
+    - numpy

test-data/recipes/used-vars/variants.yaml

@@ -0,0 +1,3 @@
+numpy:
+  - "1.5"
+  - "2.0"

test/end-to-end/test_simple.py

@@ -939,3 +939,20 @@ def test_extra_meta_is_recorded_into_about_json(
     about_json = json.loads((pkg / "info/about.json").read_text())
 
     assert snapshot_json == about_json
+
+
+def test_used_vars(rattler_build: RattlerBuild, recipes: Path, tmp_path: Path):
+    args = rattler_build.build_args(
+        recipes / "used-vars/recipe_1.yaml",
+        tmp_path,
+    )
+
+    output = rattler_build(
+        *args, "--target-platform=linux-64", "--render-only", stderr=DEVNULL
+    )
+
+    rendered = json.loads(output)
+    assert len(rendered) == 1
+    assert rendered[0]["build_configuration"]["variant"] == {
+        "target_platform": "noarch"
+    }