Go for Bash Programmers – Part II: CLI Tools
2 days ago
- #Bash
- #Go
- #CLI
- Introduction to writing CLI tools in Go for Bash programmers.
- Example CLI tool that prints 'hello' to terminal in both Bash and Go.
- Testing in Go: Writing tests before the actual code and iterating on test design.
- Using `io.Writer` interface for flexible output destinations (e.g., `bytes.Buffer` for tests, `os.Stdout` for production).
- Avoiding global variables by using structs and constructor functions (`NewPrinter`).
- Practical example: CLI tool to count duplicate lines in input, demonstrating `io.Reader` usage.
- Handling command-line arguments and flags using `os.Args` and the `flag` package.
- Design patterns for CLI tools: default behaviors, optional configurations, and error handling.