release: v2.1.0

Author: inureyes

CHANGELOG.md

@@ -5,6 +5,22 @@ All notable changes to bssh will be documented in this file.
 The format is based on [Keep a Changelog](https://keepachangelog.com/en/1.0.0/),
 and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0.html).
 
+## [2.1.0] - 2026-04-14
+
+### Added
+- `EnvGuard` RAII wrapper (`src/test_helpers/env_guard.rs`) for safe environment variable handling in tests, with Drop-based restore semantics and soundness contract documentation (#179, #181)
+- Test Environment-Variable Mutation Pattern section in ARCHITECTURE.md documenting the `EnvGuard` soundness contract and `#[serial]` usage
+
+### Changed
+- Migrated bssh and the bundled `bssh-russh` crate to the Rust 2024 edition
+- Applied 2024 edition clippy improvements: collapsed 38 nested `if let` statements into guard-clause form (`if let Some(x) = y && condition`) across `bssh-russh` client/server/keys/kex modules
+- Replaced 177 ad-hoc `unsafe { env::set_var/remove_var }` call sites across 17 test-bearing files with `EnvGuard::set` / `EnvGuard::remove` plus `#[serial]` from the `serial_test` crate
+- Removed hand-rolled `ENV_MUTEX` / `once_cell::sync::Lazy<Mutex<()>>` pattern in integration tests in favor of `#[serial]`
+- Pinned `bytes` dependency to v1.11.1
+
+### Fixed
+- Fixed pattern matching for Rust 2024 edition: removed explicit `ref` / `ref mut` bindings in `if let` patterns in `src/server/handler.rs` and `src/server/shell.rs`
+
 ## [2.0.1] - 2026-04-13
 
 ### Added
@@ -750,6 +766,7 @@ None
 - russh library for native SSH implementation
 - Cross-platform support (Linux and macOS)
 
+[2.1.0]: https://github.com/lablup/bssh/compare/v2.0.1...v2.1.0
 [2.0.1]: https://github.com/lablup/bssh/compare/v2.0.0...v2.0.1
 [2.0.0]: https://github.com/lablup/bssh/compare/v1.7.0...v2.0.0
 [1.7.0]: https://github.com/lablup/bssh/compare/v1.6.0...v1.7.0

Cargo.lock

@@ -6,7 +6,7 @@ members = [
 
 [package]
 name = "bssh"
-version = "2.0.1"
+version = "2.1.0"
 authors = ["Jeongkyu Shin <inureyes@gmail.com>"]
 description = "Parallel SSH command execution tool for cluster management"
 license = "Apache-2.0"

Cargo.toml

@@ -1445,6 +1445,7 @@ See the [LICENSE](./LICENSE) file for details.
 ## Changelog
 
 ### Recent Updates
+- **v2.1.0 (2026/04/14):** Migrate to Rust 2024 edition, apply 2024 edition clippy improvements (guard clauses with `if let ... && condition`), introduce `EnvGuard` RAII wrapper for safe environment variable handling in tests (#179, #181), and pin `bytes` to v1.11.1
 - **v2.0.1 (2026/04/13):** Add bssh-keygen to Debian package build pipeline, bump bssh-russh to 0.60.1 with security updates (RUSTSEC-2023-0071 RSA Marvin Attack fix), update RC dependencies to latest versions
 - **v2.0.0 (2026/04/13):** Major release — bssh-server SSH server for containers with SFTP/SCP, PTY/shell sessions, password + public-key auth; audit logging (file/OpenTelemetry/Logstash); IP access control, rate limiting, session management, file transfer filtering; bssh-keygen tool; SSH idle-disconnect fix via proper keepalive wiring (inactivity_timeout override + TCP SO_KEEPALIVE); bssh-russh fork synced with upstream russh 0.60.0 (rand 0.10 stable, updated RustCrypto chain); separate packaging for bssh and bssh-server
 - **v1.7.0 (2026/01/09):** Add SSH keepalive support with --server-alive-interval and --server-alive-count-max options to prevent idle connection timeouts (#122), update dependencies (russh 0.56, ratatui 0.30, whoami 2.0)

README.md

@@ -1,3 +1,35 @@
+bssh (2.1.0-1~jammy1) jammy; urgency=medium
+
+  * v2.1.0
+  ### New Features
+  - EnvGuard RAII wrapper for safe environment variable handling in tests (#179, #181)
+
+  ### Improvements
+  - Migrated bssh and bundled bssh-russh crate to Rust 2024 edition
+  - Applied 2024 edition clippy improvements: collapsed 38 nested if-let statements into guard-clause form in bssh-russh
+  - Replaced 177 ad-hoc unsafe env::set_var/remove_var call sites across 17 test files with EnvGuard + #[serial]
+  - Removed hand-rolled ENV_MUTEX pattern in integration tests in favor of #[serial]
+
+  ### Bug Fixes
+  - Fixed pattern matching for Rust 2024 edition: removed explicit ref / ref mut bindings in if-let patterns
+
+  ### CI/CD Improvements
+  None
+
+  ### Technical Details
+  - Added Test Environment-Variable Mutation Pattern section to ARCHITECTURE.md documenting EnvGuard soundness contract
+
+  ### Dependencies
+  - Pinned bytes to v1.11.1
+
+  ### Breaking Changes
+  None
+
+  ### Known Issues
+  None
+
+ -- Jeongkyu Shin <inureyes@gmail.com>  Tue, 14 Apr 2026 12:00:00 +0900
+
 bssh (2.0.1-1~jammy1) jammy; urgency=medium
 
   * v2.0.1

debian/changelog

@@ -1,6 +1,6 @@
 .\" Manpage for bssh-keygen
 .\" Contact the maintainers to correct errors or typos.
-.TH BSSH-KEYGEN 1 "April 2026" "v2.0.1" "User Commands"
+.TH BSSH-KEYGEN 1 "April 2026" "v2.1.0" "User Commands"
 
 .SH NAME
 bssh-keygen \- SSH key pair generation tool

docs/man/bssh-keygen.1

@@ -1,6 +1,6 @@
 .\" Manpage for bssh-server
 .\" Contact the maintainers to correct errors or typos.
-.TH BSSH-SERVER 8 "April 2026" "v2.0.1" "System Administration Commands"
+.TH BSSH-SERVER 8 "April 2026" "v2.1.0" "System Administration Commands"
 
 .SH NAME
 bssh-server \- Backend.AI SSH Server for container environments

docs/man/bssh-server.8

@@ -1,6 +1,6 @@
 .\" Manpage for bssh
 .\" Contact the maintainers to correct errors or typos.
-.TH BSSH 1 "April 2026" "v2.0.1" "bssh Manual"
+.TH BSSH 1 "April 2026" "v2.1.0" "bssh Manual"
 
 .SH NAME
 bssh \- Broadcast SSH - SSH-compatible client with parallel execution capabilities