Wrap long lines in generated usage message
Closed this issue · 2 comments
jatoben commented
Wrapping long help lines to the terminal width would make the usage message look much better. Unfortunately the canonical method to get the terminal size is an ioctl(2) call, and Swift is not compatible with C varargs.
beltex commented
One option for this is the following:
import Darwin.ncurses
initscr()
let terminalWidth = COLS
endwin()Not the greatest solution, it does feel heavy invoking ncurses just for this, and has a few caveats.
import Darwin.ncursesin Xcode 7 Beta 1 no longer automatically links ncurses for you, has to be done manually. I have a feeling this is a bug as Apple changed some stuff related to.dylibsthat has caused another issue so it may be related [1]. The workaround is to add it manually to the build phases setting in Xcode.- This won’t work inside the Xcode “terminal” as I imagine its because terminfo/termcap don’t recognize it. So it be an issue for running tests inside Xcode, though I’m not sure
ioctl(2)would work either.
I’m wondering though, is it necessary to do this based on terminal width? I know manual pages do this, but wouldn’t it be better for reading that it was some fixed width? Defaulted to say 80, but would be configurable (in code). Or possibly even offer both options, fixed & dynamic.