Lua tastudio branches

[YoshiRulz]

resolves #4073

[SuuperW]

(and there might be stuff to update regarding the recent addition of LuaCATS documentation, but I haven't looked at that)

[SuuperW]

I'd prefer changing the Branch method to return the instance, instead of grabbing it by index here.

Also, I think the Branch method should handle calling BranchSavedCallback. It looks like from reading related code that the callback isn't called if you branch with the context menu item, so you'd be fixing that too.

[YoshiRulz]

The other existing callsites use the index.

The callback can't be moved to the end of Branch because of this:

BizHawk/src/BizHawk.Client.EmuHawk/tools/TAStudio/BookmarksBranchesBox.cs

Lines 227 to 229 in a2e8eed

	Branch();
	EditBranchTextPopUp(Branches.Current);
	Tastudio.BranchSavedCallback?.Invoke(Branches.Count - 1);

[SuuperW]

The other existing callsites use the index.

So? They don't grab the branch, and updating Branch to return the branch will not require changing any existing uses.

The callback can't be moved to the end of Branch because of this:

Because of what? The branch not having text at the end of Branch? It should be easy enough to place a call to EditBranchTextPopUp inside Branch depending on a parameter.

[SuuperW]

Is there a reason you decided to keep "UUID" in the error message?

[YoshiRulz]

BizHawk/src/BizHawk.Client.EmuHawk/tools/Lua/Libraries/TAStudioLuaLibrary.cs

Lines 537 to 539 in dc7c820

	if (!Guid.TryParseExact(id, format: "D", out var parsed))
	{
	Log($"[tastudio.{callerFunctionName}] not a valid UUID: {id}");

That is an accurate description of the failure.

[SuuperW]

But at a level of detail most users will not understand. You changed the "UUID" in the Lua documentation to just "ID", so I thought this one might be an oversight.