Remove cachedir dependency (#11240)

## Summary Vendor the `HEADER` constant too so we can eliminate the dependency on `cachedir`.
astral-sh · Feb 5, 2025 · 6f8d9b8 · 6f8d9b8
1 parent ee2bdc2
commit 6f8d9b8
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Showing 4 changed files with 2 additions and 13 deletions.
diff --git a/Cargo.lock b/Cargo.lock
diff --git a/Cargo.toml b/Cargo.toml
@@ -85,7 +85,6 @@ base64 = { version = "0.22.1" }
 bitflags = { version = "2.6.0" }
 boxcar = { version = "0.2.5" }
 bytecheck = { version = "0.8.0" }
-cachedir = { version = "0.3.1" }
 cargo-util = { version = "0.2.14" }
 clap = { version = "4.5.17", features = ["derive", "env", "string", "wrap_help"] }
 clap_complete_command = { version = "0.6.1" }

diff --git a/crates/uv-fs/Cargo.toml b/crates/uv-fs/Cargo.toml
@@ -16,7 +16,6 @@ doctest = false
 workspace = true
 
 [dependencies]
-cachedir = { workspace = true }
 dunce = { workspace = true }
 either = { workspace = true }
 encoding_rs_io = { workspace = true }

diff --git a/crates/uv-fs/src/cachedir.rs b/crates/uv-fs/src/cachedir.rs
@@ -3,7 +3,8 @@
 use std::io::Write;
 use std::{io, path};
 
-use cachedir::HEADER;
+/// The `CACHEDIR.TAG` file header as defined by the [specification](https://bford.info/cachedir/).
+const HEADER: &[u8; 43] = b"Signature: 8a477f597d28d172789f06886806bc55";
 
 /// Adds a tag to the specified `directory`.
 ///