Add `build` feature to `dora-core` to make `git2` dependency optional

We don't want to include it for e.g. the `dora-node-api-c`.

binaries/daemon/Cargo.toml

@@ -24,7 +24,7 @@ tracing = "0.1.36"
 tracing-opentelemetry = { version = "0.18.0", optional = true }
 futures-concurrency = "7.1.0"
 serde_json = "1.0.86"
-dora-core = { workspace = true }
+dora-core = { workspace = true, features = ["build"] }
 flume = "0.10.14"
 dora-download = { workspace = true }
 dora-tracing = { workspace = true, optional = true }

libraries/core/Cargo.toml

@@ -9,6 +9,9 @@ repository.workspace = true
 
 # See more keys and their definitions at https://doc.rust-lang.org/cargo/reference/manifest.html
 
+[features]
+build = ["dep:git2", "dep:url"]
+
 [dependencies]
 dora-message = { workspace = true }
 eyre = "0.6.8"
@@ -24,6 +27,6 @@ schemars = "0.8.19"
 serde_json = "1.0.117"
 log = { version = "0.4.21", features = ["serde"] }
 dunce = "1.0.5"
-url = "2.5.4"
-git2 = { workspace = true }
 itertools = "0.14"
+url = { version = "2.5.4", optional = true }
+git2 = { workspace = true, optional = true }

libraries/core/src/lib.rs

@@ -7,6 +7,7 @@ use std::{
 
 pub use dora_message::{config, uhlc};
 
+#[cfg(feature = "build")]
 pub mod build;
 pub mod descriptor;
 pub mod metadata;