v0.3.2

CHANGELOG.md

@@ -1,3 +1,7 @@
+mail-builder 0.3.2
+================================
+- Made `gethostname` crate optional.
+
 mail-builder 0.3.1
 ================================
 - Added `MimePart::transfer_encoding` method to disable automatic Content-Transfer-Encoding detection and treat it as a raw MIME part.

Cargo.toml

@@ -1,7 +1,7 @@
 [package]
 name = "mail-builder"
 description = "E-mail builder library for Rust"
-version = "0.3.1"
+version = "0.3.2"
 edition = "2021"
 authors = [ "Stalwart Labs <[email protected]>"]
 license = "Apache-2.0 OR MIT"

README.md

@@ -10,8 +10,7 @@ _mail-builder_ is a flexible **e-mail builder library** written in Rust. It incl
 - Generates **e-mail** messages conforming to the Internet Message Format standard (_RFC 5322_).
 - Full **MIME** support (_RFC 2045 - 2049_) with automatic selection of the most optimal encoding for each message body part.
 - **Fast Base64 encoding** based on Chromium's decoder ([the fastest non-SIMD encoder](https://github.com/lemire/fastbase64)).
-- Minimal dependencies.
-  - The dependency on `gethostname` is optional.
+- No dependencies (`gethostname` is optional).
 
 Please note that this library does not support sending or parsing e-mail messages as these functionalities are provided by the crates [`mail-send`](https://crates.io/crates/mail-send) and [`mail-parser`](https://crates.io/crates/mail-parser).
 

src/encoders/base64.rs

@@ -130,6 +130,7 @@ pub fn base64_encode_mime(
 }
 
 #[cfg(test)]
+#[allow(clippy::items_after_test_module)]
 mod tests {
 
     #[test]

src/mime.rs

@@ -104,17 +104,12 @@ impl<'x> From<&'x String> for ContentType<'x> {
     }
 }
 
-thread_local!(static COUNTER: Cell<u64> = Cell::new(0));
+thread_local!(static COUNTER: Cell<u64> = const { Cell::new(0) });
 
 pub fn make_boundary(separator: &str) -> String {
+    // Create a pseudo-unique boundary
     let mut s = DefaultHasher::new();
-
-    #[cfg(feature = "gethostname")]
-    gethostname::gethostname().hash(&mut s);
-
-    #[cfg(not(feature = "gethostname"))]
-    "localhost".hash(&mut s);
-
+    ((&s as *const DefaultHasher) as usize).hash(&mut s);
     thread::current().id().hash(&mut s);
     let hash = s.finish();