tarball: Avoid flate2 and tar for release builds

Author: eth3lbert

crates/crates_io_tarball/Cargo.toml

@@ -8,14 +8,14 @@ edition = "2021"
 workspace = true
 
 [features]
-builder = []
+builder = ["dep:flate2", "dep:tar"]
 
 [dependencies]
 cargo-manifest = "=0.16.1"
-flate2 = "=1.0.35"
+flate2 = { version = "=1.0.35", optional = true }
 serde = { version = "=1.0.215", features = ["derive"] }
 serde_json = "=1.0.133"
-tar = "=0.4.43"
+tar = { version = "=0.4.43", optional = true }
 thiserror = "=2.0.3"
 tracing = "=0.1.40"
 tokio = { version = "=1.41.1", features = ["io-util", "macros", "rt-multi-thread"] }
@@ -32,3 +32,5 @@ insta = "=1.41.1"
 rayon = "=1.10.0"
 tracing-subscriber = { version = "=0.3.18", features = ["env-filter"] }
 walkdir = "=2.5.0"
+flate2 = { version = "=1.0.35" }
+tar = { version = "=0.4.43" }