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Rust Projects with Multiple Entry Points Like CLI and Web
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Rust Multiple Entry Points: Architectural Patterns
Key Points
- Core Concept: Multiple entry points in Rust enable single codebase deployment across CLI, microservices, WebAssembly and GUI contexts
- Implementation Path: Initial CLI development → Web API → Lambda/cloud functions
- Cargo Integration: Native support via
src/bindirectory or explicit binary targets inCargo.toml
Technical Advantages
- Memory Safety: Consistent safety guarantees across deployment targets
- Type Consistency: Strong typing ensures API contract integrity between interfaces
- Async Model: Unified asynchronous execution model across environments
- Binary Optimization: Compile-time optimizations yield superior performance vs runtime interpretation
- Ownership Model: No-saved-state philosophy aligns with Lambda execution context
Deployment Architecture
- Core Logic Isolation: Business logic encapsulated in library crates
- Interface Separation: Entry point-specific code segregated from core functionality
- Build Pipeline: Single compilation source enables consistent artifact generation
- Infrastructure Consistency: Uniform deployment targets eliminate environment-specific bugs
- Resource Optimization: Shared components reduce binary size and memory footprint
Implementation Benefits
- Iteration Speed: CLI provides immediate feedback loop during core development
- Security Posture: Memory safety extends across all deployment targets
- API Consistency: JSON payload structures remain identical between CLI and web interfaces
- Event Architecture: Natural alignment with event-driven cloud function patterns
- Compile-Time Optimizations: CPU-specific enhancements available at binary generation
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