| I treated myself a deep dive into how CLIs work some time ago and features like: * marking output from stderr different color (and don't interfere with commands's own formatting much); * passing more involved keyboard shortcuts to the shell or a tui program, etc.; * making last line of last command usable in next command or putting it to clipboard without mouse; * general awareness of shell/terminal emulator of what's displayed (prompt, edited line, commands printing in parallel, stdout vs stderr, messages of shell (jobs)) are very tricky to achieve without reorganizing the whole stack of terminal emulator, shell, line discipline/readline and even kernel. [0] http://www.linusakesson.net/programming/tty/index.php [1] https://utcc.utoronto.ca/~cks/space/blog/unix/TTYLineDiscipl... [2] https://github.com/sickill/stderred [3] http://www.leonerd.org.uk/hacks/fixterms [4] https://domterm.org/Wire-byte-protocol.html |