Migrate to Rust 1.79

[magicant]

Summary by CodeRabbit

• New Features
  • Updated Rust version across multiple projects to enhance functionality and performance.
• Documentation
  • Enhanced changelogs for various projects to include updated dependency versions and improvements.
• Bug Fixes
  • Clarified error conditions in method documentation for better user understanding.
• Chores
  • Consistently updated the rust-version in Cargo.toml files across all relevant projects to the latest version.

[coderabbitai[bot]]

Walkthrough

This update enhances the Rust projects within the yash ecosystem by upgrading the Rust toolchain version from 1.77.0 to 1.79.0. This change affects multiple components, including the workflow configurations, dependency specifications, and changelogs across several modules. The improvements aim to leverage newer features and optimizations in Rust, ensuring better performance and compatibility while also making documentation clearer regarding the versioning updates.

Changes

Files and Directories	Change Summary
.github/workflows/rust.yml	Updated Rust toolchain action version from 1.77.0 to 1.79.0.
check-msrv.sh	Updated cargo test command versions from 1.77.0 to 1.79.0 for multiple packages.
yash-builtin/CHANGELOG.md	Added unrelease section for version 0.3.1, noting dependency update to Rust 1.79.0.
yash-builtin/Cargo.toml	Updated rust-version from 1.77.0 to 1.79.0.
yash-cli/CHANGELOG-lib.md	Renamed bin_main to main and updated its return type; updated Rust version to 1.79.0.
yash-cli/Cargo.toml	Updated rust-version from 1.77.0 to 1.79.0.
yash-cli/src/lib.rs	Renamed function bin_main to main, changing its return type to !.
yash-cli/src/main.rs	Enhanced documentation, streamlined main to reference yash_cli::main.
yash-env-test-helper/CHANGELOG.md	Added entry for version 0.1.1, noting Rust version update to 1.79.0.
yash-env-test-helper/Cargo.toml	Updated rust-version from 1.77.0 to 1.79.0.
yash-env/CHANGELOG.md	Noted Rust upgrade to 1.79.0 and updated deprecated features section.
yash-env/Cargo.toml	Updated rust-version from 1.77.0 to 1.79.0.
yash-env/src/system/real.rs	Simplified initialization of CAUGHT_SIGNALS in is_directory.
yash-prompt/CHANGELOG.md	Added unrelease entry for version 0.1.1, noting Rust version update to 1.79.0.
yash-prompt/Cargo.toml	Updated rust-version from 1.77.0 to 1.79.0.
yash-semantics/CHANGELOG.md	Updated Rust version from 1.77.0 to 1.79.0 and noted update to yash-syntax version 0.11.0.
yash-semantics/Cargo.toml	Updated rust-version from 1.77.0 to 1.79.0.
yash-syntax/CHANGELOG.md	Updated Rust version from 1.77.0 to 1.79.0; clarified behavior of parser::lex::WordLexer.
yash-syntax/Cargo.toml	Updated rust-version from 1.77.0 to 1.79.0.

Possibly related issues

• magicant/yash-rs#336: The changes ensure feature completeness in alignment with POSIX 2018, addressing overall project readiness for the beta release.

🐰 In fields of green my code does cheer,
With Rust's new features drawing near!
A hop, a jump, we update with glee,
Making sure all runs smoothly, you see!
So here’s to the versions, both new and bright,
In our yash shell, everything’s just right! 🌼

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