add features to top-level crate

Author: mplanchard

crates/cuid/Cargo.toml

@@ -11,8 +11,8 @@ homepage.workspace = true
 repository.workspace = true
 
 [dependencies]
-cuid1.workspace = true
-cuid2.workspace = true
+cuid1 = { workspace = true, optional = true }
+cuid2 = { workspace = true, optional = true }
 
 [lib]
 name = "cuid"
@@ -21,3 +21,8 @@ path = "src/lib.rs"
 [[bin]]
 name = "cuid"
 path = "src/bin.rs"
+
+[features]
+default = ["v1", "v2"]
+v1 = ["dep:cuid1"]
+v2 = ["dep:cuid2"]

crates/cuid/src/lib.rs

@@ -24,6 +24,7 @@
 //!
 //! ```sh
 //! $> cuid --v2
+//! i12sf8k69lbvktlr7qb4p6xv
 //! ```
 //!
 //! See the [original v1 implementation] and [original v2 implementation] for
@@ -33,10 +34,15 @@
 //! [original v2 implementation]: https://github.com/paralleldrive/cuid2
 //!
 
-pub use cuid1::{cuid as cuid1, is_cuid as is_cuid1, is_slug as is_cuid1_slug, slug as cuid1_slug};
+#[cfg(feature = "v1")]
+pub use cuid1::{
+    cuid as cuid1, is_cuid as is_cuid1, is_slug as is_cuid1_slug, slug as cuid1_slug,
+};
+#[cfg(feature = "v1")]
 #[doc(hidden)]
 pub use cuid1::{one_off_cuid1, one_off_cuid1_slug};
 
+#[cfg(feature = "v2")]
 pub use cuid2::{
     cuid as cuid2, is_cuid2, is_slug as is_cuid2_slug, slug as cuid2_slug,
     CuidConstructor as Cuid2Constructor,