regex as optional dep

crates/core/block/Cargo.toml

@@ -14,14 +14,12 @@ maintenance = { status = "passively-maintained" }
 [dependencies]
 rimecraft-registry = { path = "../registry" }
 glam = "0.25"
-rimecraft-state = { path = "../state", optional = true }
+rimecraft-state = { path = "../state" }
 rimecraft-edcode = { path = "../../util/edcode", optional = true }
 serde = { version = "1.0", optional = true }
 
 [features]
-default = ["state"]
 serde = ["dep:serde"]
-state = ["dep:rimecraft-state"]
 edcode = ["dep:rimecraft-edcode"]
 
 [lints]

crates/core/state/Cargo.toml

@@ -12,11 +12,16 @@ categories = []
 maintenance = { status = "passively-maintained" }
 
 [dependencies]
-regex = "1.10"
+regex = { version = "1.10", optional = true }
 serde = { version = "1.0", optional = true }
 
 [features]
 serde = ["dep:serde"]
+# use `regex` crate instead of `regex-lite`.
+regex = ["dep:regex"]
+
+[target.'cfg(not(feature = "regex"))'.dependencies]
+regex-lite = "0.1"
 
 [lints]
 workspace = true

crates/core/state/src/lib.rs

@@ -12,7 +12,11 @@ use std::{
 };
 
 use property::{BiIndex, ErasedProperty, Property, Wrap};
+
+#[cfg(feature = "regex")]
 use regex::Regex;
+#[cfg(not(feature = "regex"))]
+use regex_lite::Regex;
 
 use crate::property::ErasedWrap;
 

crates/util/fmt/Cargo.toml

@@ -14,10 +14,15 @@ maintenance = { status = "passively-maintained" }
 [dependencies]
 serde = { version = "1.0", features = ["derive"], optional = true }
 rgb = "0.8"
-regex = "1.10"
+regex = { version = "1.10", optional = true }
 
 [features]
 serde = ["dep:serde"]
+# use `regex` crate instead of `regex-lite`.
+regex = ["dep:regex"]
+
+[target.'cfg(not(feature = "regex"))'.dependencies]
+regex-lite = "0.1"
 
 [lints]
 workspace = true

crates/util/fmt/src/lib.rs

@@ -2,9 +2,13 @@
 
 use std::{fmt::Display, ops::Deref, sync::OnceLock};
 
-use regex::Regex;
 use rgb::RGB8;
 
+#[cfg(feature = "regex")]
+use regex::Regex;
+#[cfg(not(feature = "regex"))]
+use regex_lite::Regex;
+
 /// Color index of a formatting.
 #[derive(Debug, Clone, Copy, PartialEq, Eq, Hash)]
 pub struct ColorIndex(pub Option<u32>);