Only install libcurses5 and libtinfo5 when GHC is actually < 8.3

[langston-barrett]

I recently found this in the logs for haskell-actions/setup.

Installing libcurses5 and libtinfo5 using apt-get (for ghc < 8.3)

I was confused by this, because the job in question had requested GHC 9.8.

These apt-get invocations take a non-trivial amount of time, and happen before anything else in my CI builds. Perhaps they could be gated to only happen when the requested version of GHC actually requires it?

[andreasabel]

I probably got the conditional wrong:

setup/src/installer.ts

Lines 174 to 180 in 1983353

	if (tool === 'ghc' && compareVersions('8.3', version)) {
	// Andreas, 2022-12-09: The following errors out if we are not ubuntu-20.04.
	// Atm, I do not know how to check whether we are on ubuntu-20.04.
	// So, ignore the error.
	// if (!(await aptLibCurses5())) break;
	await aptLibNCurses5();
	}

It was modified but not fixed by 1603f72.

[andreasabel]

I released a fix in 2.7.11.

[langston-barrett]

Wow, thank you for the rapid fix and release!