Allows installdir, bindir and libdir to be configured via opt arguments

[A2va]

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[waruqi]

we should not call target:set to modify target installdir configuration.

[A2va]

I was wondering if I could save the installdir of a target, then set it to the old value at the end of the function.
The other solution that comes to mind is to add an opt argument to installdir, libdir and bindir of target.

Which solution do you prefer?

[waruqi]

why not use local installdir = opt.installdir and opt.installdir or target:installdir()?

[A2va]

Because when target:installdir(opt.bindir) is called, installdir is not set in the target (or not the right value). One solution would be to join installdir and bindir each time, but as this is already what bindir does, I haven't considered this option.

[waruqi]

you can add function _get_installdir(target, opt) to wrap it. then get them each time.

[waruqi]

like this

xmake/xmake/plugins/pack/batchcmds.lua

Lines 28 to 62 in b938556

	function _get_target_bindir(package, target)
	local bindir = package:bindir()
	local prefixdir = target:prefixdir()
	if prefixdir then
	bindir = path.join(package:installdir(), prefixdir, target:extraconf("prefixdir", prefixdir, "bindir") or "bin")
	end
	return path.normalize(bindir)
	end
	function _get_target_libdir(package, target)
	local libdir = package:libdir()
	local prefixdir = target:prefixdir()
	if prefixdir then
	libdir = path.join(package:installdir(), prefixdir, target:extraconf("prefixdir", prefixdir, "libdir") or "lib")
	end
	return path.normalize(libdir)
	end
	function _get_target_includedir(package, target)
	local includedir = package:includedir()
	local prefixdir = target:prefixdir()
	if prefixdir then
	includedir = path.join(package:installdir(), prefixdir, target:extraconf("prefixdir", prefixdir, "includedir") or "include")
	end
	return path.normalize(includedir)
	end
	function _get_target_installdir(package, target)
	local installdir = package:installdir()
	local prefixdir = target:prefixdir()
	if prefixdir then
	installdir = path.join(package:installdir(), prefixdir)
	end
	return path.normalize(installdir)
	end