removed unused mini-buffer feature, optimised imports/features

Cargo.toml

@@ -10,9 +10,8 @@ rust-version = "1.43.0" # cached requires 1.42.0
 #license-file = "LICENSE"
 
 [features]
-default = ["mini-buffer", "multi-threaded", "infer-backend"]
-mini-buffer = []
-multi-threaded = []
+default = ["multi-threaded", "infer-backend"]
+multi-threaded = ["rayon"]
 infer-backend = ["infer"]
 xdg-mime-backend = ["xdg-mime"]
 
@@ -21,9 +20,9 @@ walkdir = "2.3.1"
 log = "0.4.14"
 smartstring = "0.2.6"
 mime_guess = "2.0.3"
-rayon = "1.5.0"
 snailquote = "0.3.0"
 once_cell = "1.5.2"
+rayon = { version = "1.5.0", optional = true }
 infer = { version = "0.3.4", optional = true }
 # use git version while waiting on a release incorporating https://github.com/ebassi/xdg-mime-rs/commit/de5a6dd
 xdg-mime = {git = "https://github.com/ebassi/xdg-mime-rs", version = "0.3", rev = "de5a6dd", optional = true }

src/inspectors.rs

@@ -23,6 +23,7 @@ const BUF_SIZE: usize = 512;
 
 pub fn mime_type<T: MimeDb>(db: &T, path: &Path) -> io::Result<Option<Mime>, > {
 	// attempt to read up to the BUF_SIZE bytes of the file
+
 	let mut buffer = [0; 64];
 	let mut file = File::open(path)?;
 

src/mimedb.rs

@@ -1,6 +1,6 @@
-use std::str::FromStr;
-
 use mime_guess::Mime;
+#[cfg(feature = "infer-backend")]
+	use std::str::FromStr;
 
 pub trait MimeDb {
 	fn init() -> Self;