alt-left/right overwrites fish_prompt without clearing trailing characters

[artagnon]

I have a simple prompt:

function fish_prompt
	set_color yellow
	echo (pwd) | sed -e "s|^$HOME|~|" -e "s|^/sandbox/rramacha|\$s|"
	set_color normal
	echo '$ '
end

When I alt-left from ~/src/llvm/tools/polly/test/ScopDetect to ~/src/jsoncpp, my prompt is mangled:

~/src/jsoncppols/polly/test/ScopDetect
$

Not sure how to work around this except by padding the path with trailing spaces?

[faho]

This seems related to #3537, since it also only seems to occur with a multi-line prompt.

[artagnon]

I looked at the that thread earlier, but it didn't strike me as being related. This is probably a dupe, and the most elegant workaround is a single-line prompt.

[artagnon]

Can I change the color of the prompt twice on the same line? I want to distinguish between the cwd path and '$'.

[krader1961]

Yes, you can change colors multiple times. I do it:

[artagnon]

Hm, I added -n to my echo invocations, but it seems to have no effect.

[krader1961]

Works for me:

function fish_prompt
    set -l cwd (echo (pwd) | sed -e "s|^$HOME|~|" -e "s|^/sandbox/rramacha|\$s|")
    echo -n (set_color yellow)$cwd(set_color normal) '$ '
end

Note that mutating the PWD can be done more efficiently but I'll leave that as an exercise for the student. Hint: start by using $PWD rather than (pwd) and use the string builtin rather than shelling out to sed.

[artagnon]

Thanks! Much appreciated.

[faho]

Can't reproduce in master, there've been a lot of changes since this was reported. Closing!

[zanchey]

It's broken in 3.1.2 but fixed in 3.2.0.