fix: change to use manifest_root other backends (#456)

Author: nichmor

crates/pixi-build-cmake/src/main.rs

@@ -31,12 +31,28 @@ impl GenerateRecipe for CMakeGenerator {
         &self,
         model: &ProjectModelV1,
         config: &Self::Config,
-        manifest_root: PathBuf,
+        manifest_path: PathBuf,
         host_platform: Platform,
         _python_params: Option<PythonParams>,
         variants: &HashSet<NormalizedKey>,
         _channels: Vec<ChannelUrl>,
     ) -> miette::Result<GeneratedRecipe> {
+        // Determine the manifest root, because `manifest_path` can be
+        // either a direct file path or a directory path.
+        let manifest_root = if manifest_path.is_file() {
+            manifest_path
+                .parent()
+                .ok_or_else(|| {
+                    miette::Error::msg(format!(
+                        "Manifest path {} is a file but has no parent directory.",
+                        manifest_path.display()
+                    ))
+                })?
+                .to_path_buf()
+        } else {
+            manifest_path.clone()
+        };
+
         let mut generated_recipe =
             GeneratedRecipe::from_model(model.clone(), &mut DefaultMetadataProvider)
                 .into_diagnostic()?;

crates/pixi-build-mojo/src/main.rs

@@ -28,12 +28,28 @@ impl GenerateRecipe for MojoGenerator {
         &self,
         model: &ProjectModelV1,
         config: &Self::Config,
-        manifest_root: PathBuf,
+        manifest_path: PathBuf,
         host_platform: Platform,
         _python_params: Option<PythonParams>,
         variants: &HashSet<NormalizedKey>,
         _channels: Vec<ChannelUrl>,
     ) -> miette::Result<GeneratedRecipe> {
+        // Determine the manifest root, because `manifest_path` can be
+        // either a direct file path or a directory path.
+        let manifest_root = if manifest_path.is_file() {
+            manifest_path
+                .parent()
+                .ok_or_else(|| {
+                    miette::Error::msg(format!(
+                        "Manifest path {} is a file but has no parent directory.",
+                        manifest_path.display()
+                    ))
+                })?
+                .to_path_buf()
+        } else {
+            manifest_path.clone()
+        };
+
         let mut generated_recipe =
             GeneratedRecipe::from_model(model.clone(), &mut DefaultMetadataProvider)
                 .into_diagnostic()?;

crates/pixi-build-python/src/main.rs

@@ -56,14 +56,30 @@ impl GenerateRecipe for PythonGenerator {
         &self,
         model: &ProjectModelV1,
         config: &Self::Config,
-        manifest_root: PathBuf,
+        manifest_path: PathBuf,
         host_platform: Platform,
         python_params: Option<PythonParams>,
         variants: &HashSet<NormalizedKey>,
         _channels: Vec<ChannelUrl>,
     ) -> miette::Result<GeneratedRecipe> {
         let params = python_params.unwrap_or_default();
 
+        // Determine the manifest root, because `manifest_path` can be
+        // either a direct file path or a directory path.
+        let manifest_root = if manifest_path.is_file() {
+            manifest_path
+                .parent()
+                .ok_or_else(|| {
+                    miette::Error::msg(format!(
+                        "Manifest path {} is a file but has no parent directory.",
+                        manifest_path.display()
+                    ))
+                })?
+                .to_path_buf()
+        } else {
+            manifest_path.clone()
+        };
+
         let mut pyproject_metadata_provider = PyprojectMetadataProvider::new(
             &manifest_root,
             config

crates/pixi-build-rust/src/main.rs

@@ -36,14 +36,30 @@ impl GenerateRecipe for RustGenerator {
         &self,
         model: &ProjectModelV1,
         config: &Self::Config,
-        manifest_root: PathBuf,
+        manifest_path: PathBuf,
         host_platform: Platform,
         _python_params: Option<PythonParams>,
         variants: &HashSet<NormalizedKey>,
         _channels: Vec<ChannelUrl>,
     ) -> miette::Result<GeneratedRecipe> {
         // Construct a CargoMetadataProvider to read the Cargo.toml file
         // and extract metadata from it.
+        // Determine the manifest root, because `manifest_path` can be
+        // either a direct file path or a directory path.
+        let manifest_root = if manifest_path.is_file() {
+            manifest_path
+                .parent()
+                .ok_or_else(|| {
+                    miette::Error::msg(format!(
+                        "Manifest path {} is a file but has no parent directory.",
+                        manifest_path.display()
+                    ))
+                })?
+                .to_path_buf()
+        } else {
+            manifest_path.clone()
+        };
+
         let mut cargo_metadata = CargoMetadataProvider::new(
             &manifest_root,
             config.ignore_cargo_manifest.is_some_and(|ignore| ignore),