Help text should automatically wrap based on term width

[nikkolasg]

When we got a long text description in Usage, it should automatically wrap and make a nice display.
A bit like what "man" does, it automatically rewraps the text so it fits nicely in the current terminal session.

[cvle]

+1

[syossan27]

+1

[immesys]

+1

[hickeng]

and should be able to handle \n in the various command and flag descriptions, indenting appropriately.

[JensRantil]

...or simply wrap at 80 characters, which is considered a common default and also adheres to general readability best-practises.

[coilysiren]

This feature is now in review - @urfave/cli please add a 👍 or 👎 to the top post if you're in favor or against this feature being added!

[saschagrunert]

@lynncyrin we should move forward with this one. Wrapping based on the term width seems a sane default. :)

[coilysiren]

👀 this is now ready for anyone to work on!

[xordspar0]

...or simply wrap at 80 characters, which is considered a common default and also adheres to general readability best-practises.

I agree that an 80 character limit would be easier to read. It would also be easier to implement. That said, I don't want to bikeshed this issue. Whoever actually does the work to implement this will have my vote.

[mostynb]

I will try to make #1119 implement a basic version of this feature.

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[mostynb]

Bump.

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[mostynb]

Bump.

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[mostynb]

Bump.

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[dearchap]

Duplicate of #674

[mostynb]

I added line-wrapping support in #287, but the terminal's width detection is not automatic (to avoid adding new dependencies/adding binary size). Here's an example of how client code can specify the line-wrap length: https://github.com/urfave/cli/pull/1119/files#diff-4d3f36d62cad94424544bb84fc93b33b73ffe3491a4ddca81a7f825539afc19cR1161-R1169