Move extra specification into uv-configuration (#3897)

## Summary

I need to use this in the resolver (and it's at-home with other, similar
configuration options).

crates/uv-requirements/src/pyproject.rs

@@ -24,13 +24,13 @@ use distribution_types::{Requirement, RequirementSource, Requirements};
 use pep440_rs::VersionSpecifiers;
 use pep508_rs::{Pep508Error, RequirementOrigin, VerbatimUrl, VersionOrUrl};
 use pypi_types::VerbatimParsedUrl;
-use uv_configuration::PreviewMode;
+use uv_configuration::{ExtrasSpecification, PreviewMode};
 use uv_fs::Simplified;
 use uv_git::GitReference;
 use uv_normalize::{ExtraName, PackageName};
 use uv_warnings::warn_user_once;
 
-use crate::{ExtrasSpecification, Workspace};
+use crate::Workspace;
 
 #[derive(Debug, Error)]
 pub enum Pep621Error {
@@ -683,12 +683,12 @@ mod test {
     use indoc::indoc;
     use insta::assert_snapshot;
 
-    use uv_configuration::PreviewMode;
+    use uv_configuration::{ExtrasSpecification, PreviewMode};
     use uv_fs::Simplified;
     use uv_normalize::PackageName;
 
     use crate::ProjectWorkspace;
-    use crate::{ExtrasSpecification, RequirementsSpecification};
+    use crate::RequirementsSpecification;
 
     fn from_source(
         contents: &str,

crates/uv-requirements/src/source_tree.rs

@@ -12,13 +12,12 @@ use distribution_types::{
 };
 use pep508_rs::RequirementOrigin;
 use pypi_types::VerbatimParsedUrl;
+use uv_configuration::ExtrasSpecification;
 use uv_distribution::{DistributionDatabase, Reporter};
 use uv_fs::Simplified;
 use uv_resolver::{InMemoryIndex, MetadataResponse};
 use uv_types::{BuildContext, HashStrategy};
 
-use crate::ExtrasSpecification;
-
 /// A resolver for requirements specified via source trees.
 ///
 /// Used, e.g., to determine the input requirements when a user specifies a `pyproject.toml`

crates/uv-requirements/src/sources.rs

@@ -3,7 +3,6 @@ use std::path::{Path, PathBuf};
 use console::Term;
 
 use uv_fs::Simplified;
-use uv_normalize::ExtraName;
 use uv_warnings::warn_user;
 
 use crate::confirm;
@@ -154,37 +153,3 @@ impl std::fmt::Display for RequirementsSource {
         }
     }
 }
-
-#[derive(Debug, Default, Clone)]
-pub enum ExtrasSpecification {
-    #[default]
-    None,
-    All,
-    Some(Vec<ExtraName>),
-}
-
-impl ExtrasSpecification {
-    /// Determine the extras specification to use based on the command-line arguments.
-    pub fn from_args(all_extras: bool, extra: Vec<ExtraName>) -> Self {
-        if all_extras {
-            ExtrasSpecification::All
-        } else if extra.is_empty() {
-            ExtrasSpecification::None
-        } else {
-            ExtrasSpecification::Some(extra)
-        }
-    }
-
-    /// Returns true if a name is included in the extra specification.
-    pub fn contains(&self, name: &ExtraName) -> bool {
-        match self {
-            ExtrasSpecification::All => true,
-            ExtrasSpecification::None => false,
-            ExtrasSpecification::Some(extras) => extras.contains(name),
-        }
-    }
-
-    pub fn is_empty(&self) -> bool {
-        matches!(self, ExtrasSpecification::None)
-    }
-}

crates/uv-requirements/src/specification.rs

@@ -47,13 +47,13 @@ use requirements_txt::{
     EditableRequirement, FindLink, RequirementEntry, RequirementsTxt, RequirementsTxtRequirement,
 };
 use uv_client::BaseClientBuilder;
-use uv_configuration::{NoBinary, NoBuild, PreviewMode};
+use uv_configuration::{ExtrasSpecification, NoBinary, NoBuild, PreviewMode};
 use uv_fs::Simplified;
 use uv_normalize::{ExtraName, PackageName};
 
 use crate::pyproject::{Pep621Metadata, PyProjectToml};
 use crate::ProjectWorkspace;
-use crate::{ExtrasSpecification, RequirementsSource, Workspace, WorkspaceError};
+use crate::{RequirementsSource, Workspace, WorkspaceError};
 
 #[derive(Debug, Default)]
 pub struct RequirementsSpecification {