1 files changed, 90 insertions, 0 deletions
diff --git a/third_party/rust/cargo_metadata/src/dependency.rs b/third_party/rust/cargo_metadata/src/dependency.rs
new file mode 100644
index 0000000000..89bcf9f2f1
--- /dev/null
+++ b/third_party/rust/cargo_metadata/src/dependency.rs
@@ -0,0 +1,90 @@
+//! This module contains `Dependency` and the types/functions it uses for deserialization.
+
+use std::fmt;
+
+use camino::Utf8PathBuf;
+#[cfg(feature = "builder")]
+use derive_builder::Builder;
+use semver::VersionReq;
+use serde::{Deserialize, Deserializer, Serialize};
+
+#[derive(Eq, PartialEq, Clone, Debug, Copy, Hash, Serialize, Deserialize)]
+/// Dependencies can come in three kinds
+pub enum DependencyKind {
+    #[serde(rename = "normal")]
+    /// The 'normal' kind
+    Normal,
+    #[serde(rename = "dev")]
+    /// Those used in tests only
+    Development,
+    #[serde(rename = "build")]
+    /// Those used in build scripts only
+    Build,
+    #[doc(hidden)]
+    #[serde(other)]
+    Unknown,
+}
+
+impl Default for DependencyKind {
+    fn default() -> DependencyKind {
+        DependencyKind::Normal
+    }
+}
+
+impl fmt::Display for DependencyKind {
+    fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
+        let s = serde_json::to_string(self).unwrap();
+        // skip opening and closing quotes
+        f.write_str(&s[1..s.len() - 1])
+    }
+}
+
+/// The `kind` can be `null`, which is interpreted as the default - `Normal`.
+pub(super) fn parse_dependency_kind<'de, D>(d: D) -> Result<DependencyKind, D::Error>
+where
+    D: Deserializer<'de>,
+{
+    Deserialize::deserialize(d).map(|x: Option<_>| x.unwrap_or_default())
+}
+
+#[derive(Clone, Serialize, Deserialize, Debug, PartialEq, Eq)]
+#[cfg_attr(feature = "builder", derive(Builder))]
+#[non_exhaustive]
+#[cfg_attr(feature = "builder", builder(pattern = "owned", setter(into)))]
+/// A dependency of the main crate
+pub struct Dependency {
+    /// Name as given in the `Cargo.toml`
+    pub name: String,
+    /// The source of dependency
+    pub source: Option<String>,
+    /// The required version
+    pub req: VersionReq,
+    /// The kind of dependency this is
+    #[serde(deserialize_with = "parse_dependency_kind")]
+    pub kind: DependencyKind,
+    /// Whether this dependency is required or optional
+    pub optional: bool,
+    /// Whether the default features in this dependency are used.
+    pub uses_default_features: bool,
+    /// The list of features enabled for this dependency.
+    pub features: Vec<String>,
+    /// The target this dependency is specific to.
+    ///
+    /// Use the [`Display`] trait to access the contents.
+    ///
+    /// [`Display`]: std::fmt::Display
+    pub target: Option<Platform>,
+    /// If the dependency is renamed, this is the new name for the dependency
+    /// as a string.  None if it is not renamed.
+    pub rename: Option<String>,
+    /// The URL of the index of the registry where this dependency is from.
+    ///
+    /// If None, the dependency is from crates.io.
+    pub registry: Option<String>,
+    /// The file system path for a local path dependency.
+    ///
+    /// Only produced on cargo 1.51+
+    pub path: Option<Utf8PathBuf>,
+}
+
+pub use cargo_platform::Platform;