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31 lines
1.3 KiB
Lua
31 lines
1.3 KiB
Lua
5 years ago
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-- LibStub is a simple versioning stub meant for use in Libraries. http://www.wowace.com/wiki/LibStub for more info
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-- LibStub is hereby placed in the Public Domain Credits: Kaelten, Cladhaire, ckknight, Mikk, Ammo, Nevcairiel, joshborke
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local LIBSTUB_MAJOR, LIBSTUB_MINOR = "LibStub", 2 -- NEVER MAKE THIS AN SVN REVISION! IT NEEDS TO BE USABLE IN ALL REPOS!
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local LibStub = _G[LIBSTUB_MAJOR]
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if not LibStub or LibStub.minor < LIBSTUB_MINOR then
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LibStub = LibStub or {libs = {}, minors = {} }
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_G[LIBSTUB_MAJOR] = LibStub
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LibStub.minor = LIBSTUB_MINOR
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function LibStub:NewLibrary(major, minor)
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assert(type(major) == "string", "Bad argument #2 to `NewLibrary' (string expected)")
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minor = assert(tonumber(strmatch(minor, "%d+")), "Minor version must either be a number or contain a number.")
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local oldminor = self.minors[major]
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if oldminor and oldminor >= minor then return nil end
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self.minors[major], self.libs[major] = minor, self.libs[major] or {}
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return self.libs[major], oldminor
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end
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function LibStub:GetLibrary(major, silent)
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if not self.libs[major] and not silent then
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error(("Cannot find a library instance of %q."):format(tostring(major)), 2)
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end
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return self.libs[major], self.minors[major]
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end
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function LibStub:IterateLibraries() return pairs(self.libs) end
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setmetatable(LibStub, { __call = LibStub.GetLibrary })
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end
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