CLI
Exit Codes and Error Output for Rust Command Line Tools
Exit codes are how scripts know your tool failed. Return 0 for success, a nonzero code for failure, send errors to stderr, and let main return ExitCode or Result.
2 min read
Topic
CLI
Small, fast command-line programs: parsing arguments, reading config, failing politely and shipping a single binary.
CLI
Reading Standard Input in Rust Lines Bytes and Pipes
Read stdin as lines, bytes or all at once, handle empty input, detect pipes versus terminals, and avoid loading huge streams into memory.
2 min read
CLI
Progress Bars and Spinners in Rust With Indicatif Explained
Show progress for long operations with indicatif: bars with known length, spinners for unknown work, wrapping iterators and keeping log lines from garbling the bar.
2 min read
CLI
Colored Terminal Output in Rust With Anstyle and Owo Colors
Add colors to CLI output with anstyle or owo-colors, and turn them off when stdout is not a terminal or NO_COLOR is set, so pipes and logs stay clean.
2 min read
CLIGuide
Build a Git Hook Manager in Rust From Scratch Step by Step
Build a git hook manager in Rust: read a hooks config, install shims into .git/hooks, run commands on staged files in order, and report results with proper exit codes.
16 min read
CLIGuide
Build a Todo CLI in Rust With Serde and a JSON File
Build a todo list CLI in Rust with clap subcommands, serde JSON storage, stable ids, atomic and durable saves, and a file lock that stops concurrent runs from losing items. Every claim measured.
17 min read
CLIGuide
Build a Markdown Link Checker in Rust With Reqwest
Build a Markdown link checker in Rust: extract links with pulldown-cmark, check them concurrently with reqwest and a semaphore, retry, report and set exit codes.
18 min read
CLIGuide
Build a Fast File Finder in Rust With Parallel Walking
Build a fast file finder in Rust: parallel directory walking with the ignore crate, glob and regex filters, size and type predicates, and sorted deterministic output.
16 min read
CLIGuide
Build a Grep Clone in Rust and Learn File Handling
Build a grep clone in Rust from a naive version that panics on Latin-1 text to a streaming one that searches 72 MB in 77 ms with 2.5 MB of memory, handling binary files, exit codes and broken pipes.
20 min read
CLI
Detecting a Terminal and Handling Pipes in Rust CLIs
Know whether stdout is a terminal or a pipe, and change behavior: color, progress bars, paging, width and line buffering. Use IsTerminal and NO_COLOR correctly.
3 min read
CLIGuide
Terminal User Interfaces in Rust With Ratatui Step by Step
Build a terminal user interface with Ratatui: init and restore, the draw loop, widgets and layout, handling key events and state, with a small counter and list app.
16 min read
DevOps
Configuration for Rust Services With Environment Variables
Load settings from environment variables into a typed struct at startup, fail fast on missing values, give safe defaults for the rest and keep secrets out of logs and Debug output.
3 min read
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