Learn ELVISH with Real Code Examples
Updated Nov 20, 2025
Architecture
Interpreter-based shell
Pipeline and command-oriented design
Structured data handling as first-class citizens
Modules and namespaces for modularity
Interactive REPL and scripting environment
Rendering Model
Interpreter evaluates pipelines and structured data
REPL allows interactive testing and debugging
Modules loaded dynamically at runtime
Variables and closures scoped via namespaces
Pipelines pass structured objects rather than just strings
Architectural Patterns
Interpreter-based shell
Pipeline-first design
Structured data and object-like commands
Module and namespace modularization
Interactive and automation-friendly workflows
Real World Architectures
System automation and backup pipelines
Interactive CLI tools with structured data
Data transformation and reporting scripts
Custom command modules for admins
Automation workflows in Unix/Linux environments
Design Principles
Structured data pipelines as first-class citizens
Interactive, user-friendly REPL
Modules and namespaces for modularity
Consistency and simplicity in syntax
Integration with system commands and automation
Scalability Guide
Use modules for large codebases
Leverage pipelines for efficient data processing
Encapsulate state in namespaces
Split automation tasks into multiple scripts
Optimize memory usage for large structured datasets
Migration Guide
Adapt Bash/Zsh scripts to Elvish structured pipelines
Refactor functions into modules
Replace string-based pipelines with structured data pipelines
Modularize reusable tasks
Test scripts interactively in REPL