feat: add colors to CLI help#1884
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Style clap-generated help with Cargo's palette and enable terminal-width wrapping. Preserve clap's automatic terminal detection so redirected output and NO_COLOR remain unstyled.
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Description
Add Cargo-inspired colors to clap-generated help and diagnostics. Headings use bright green, command-line syntax uses bright cyan, and placeholders use cyan.
Enable clap’s
wrap_helpfeature so long descriptions wrap to the terminal width. Color remains subject to clap/anstream’s automatic terminal detection andNO_COLORsupport.This revisits #444, which proposed colored help before eza used clap. That implementation embedded ANSI escapes directly and did not respect
NO_COLOR; the current clap-based approach handles those concerns centrally.This change does not introduce a command-line flag, so no completion, man page, or README updates are required.
How Has This Been Tested?
Tested on macOS 15.7.7 with rustc and Cargo 1.97.1.
cargo fmt --all --checkcargo testNO_COLORset