Project Structure

Relevant source files

• .gitignore
• Cargo.toml

This document provides an overview of the timer_list repository organization, key configuration files, and development environment setup. It is intended for contributors who need to understand how the codebase is structured and how to set up a local development environment.

For information about building and testing the crate, see Building and Testing. For details about the core API implementation, see Core API Reference.

Repository Layout

The timer_list repository follows a standard Rust crate structure with additional configuration for CI/CD and documentation.

Overall Repository Structure

flowchart TD
subgraph workflows_directory["workflows/ Directory"]
    ci_yml["ci.yml"]
end
subgraph github_directory[".github/ Directory"]
    workflows_dir["workflows/"]
end
subgraph src_directory["src/ Directory"]
    lib_rs["lib.rs"]
end
subgraph timer_list_repository["timer_list Repository Root"]
    cargo_toml["Cargo.toml"]
    src_dir["src/"]
    readme["README.md"]
    gitignore[".gitignore"]
    github_dir[".github/"]
end

cargo_toml --> src_dir
github_dir --> workflows_dir
src_dir --> lib_rs
workflows_dir --> ci_yml

Sources: Cargo.toml(L1 - L15)  .gitignore(L1 - L5) 

File Organization Principles

The repository follows these organizational principles:

Sources: Cargo.toml(L1 - L15)  .gitignore(L1 - L5) 

Core Configuration Files

Package Configuration

The Cargo.toml file defines the crate's identity, dependencies, and metadata:

flowchart TD
subgraph cargo_toml_structure["Cargo.toml Structure"]
    name_field["name = timer_list"]
    package_section["[package]"]
    dependencies_section["[dependencies]"]
end
subgraph package_metadata["Package Metadata"]
    name_field["name = timer_list"]
    version_field["version = 0.1.0"]
    edition_field["edition = 2021"]
    author_field["authors"]
    description_field["description"]
    license_field["license"]
    homepage_field["homepage"]
    repository_field["repository"]
    documentation_field["documentation"]
    keywords_field["keywords"]
    categories_field["categories"]
    package_section["[package]"]
end
empty_deps["(empty)"]

dependencies_section --> empty_deps

Sources: Cargo.toml(L1 - L15) 

Key Package Metadata

Sources: Cargo.toml(L2 - L12) 

External References

The package configuration includes several external links:

• Homepage: Cargo.toml(L8)  points to the ArceOS organization
• Repository: Cargo.toml(L9)  points to the specific timer_list repository
• Documentation: Cargo.toml(L10)  points to docs.rs for API documentation

Sources: Cargo.toml(L8 - L10) 

Dependencies

The crate currently has no external dependencies, as shown by the empty [dependencies] section at Cargo.toml(L14 - L15)  This supports the crate's no-std design and minimal footprint for embedded environments.

Sources: Cargo.toml(L14 - L15) 

Git Configuration

The .gitignore file excludes development artifacts and environment-specific files:

flowchart TD
subgraph ignored_patterns["Ignored Patterns"]
    target_dir["/target"]
    vscode_dir["/.vscode"]
    ds_store[".DS_Store"]
    cargo_lock["Cargo.lock"]
end
subgraph git_ignore_categories["Git Ignore Categories"]
    build_artifacts["Build Artifacts"]
    ide_files["IDE Files"]
    os_files["OS Files"]
    security_files["Security Files"]
end

build_artifacts --> cargo_lock
build_artifacts --> target_dir
ide_files --> vscode_dir
os_files --> ds_store

Sources: .gitignore(L1 - L5) 

Ignored File Types

Sources: .gitignore(L1 - L4) 

Development Environment Setup

Prerequisites

To contribute to the timer_list crate, developers need:

1. Rust Toolchain: Edition 2021 or later
2. Target Support: Multiple architectures supported by CI
3. Development Tools: cargo fmt, cargo clippy for code quality

Local Development Workflow

sequenceDiagram
    participant Developer as "Developer"
    participant LocalEnvironment as "Local Environment"
    participant GitRepository as "Git Repository"
    participant CIPipeline as "CI Pipeline"

    Developer ->> LocalEnvironment: "cargo check"
    Developer ->> LocalEnvironment: "cargo fmt"
    Developer ->> LocalEnvironment: "cargo clippy"
    Developer ->> LocalEnvironment: "cargo test"
    Developer ->> GitRepository: "git commit & push"
    GitRepository ->> CIPipeline: "trigger workflows"
    CIPipeline ->> CIPipeline: "multi-arch builds"
    CIPipeline ->> CIPipeline: "documentation generation"

Sources: Cargo.toml(L1 - L15)  .gitignore(L1 - L5) 

File Modification Guidelines

When modifying the repository structure:

• Core Implementation: Changes to src/lib.rs affect the main API
• Package Configuration: Changes to Cargo.toml affect crate metadata and dependencies
• CI Configuration: Changes to .github/workflows/ affect automated testing
• Documentation: Changes to README.md affect project overview and examples

The minimal file structure supports the crate's focused purpose as a lightweight timer event management system for no-std environments.

Sources: Cargo.toml(L12)  .gitignore(L1 - L5)