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1 | 2 | Arvak-118457 | -- LibStub is a simple versioning stub meant for use in Libraries. http://www.wowace.com/wiki/LibStub for more info |
2 | Arvak-118457 | -- LibStub is hereby placed in the Public Domain Credits: Kaelten, Cladhaire, ckknight, Mikk, Ammo, Nevcairiel, joshborke |
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3 | Arvak-118457 | 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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4 | Arvak-118457 | local LibStub = _G[LIBSTUB_MAJOR] |
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5 | Arvak-118457 | ||
6 | Arvak-118457 | if not LibStub or LibStub.minor < LIBSTUB_MINOR then |
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7 | Arvak-118457 | LibStub = LibStub or {libs = {}, minors = {} } |
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8 | Arvak-118457 | _G[LIBSTUB_MAJOR] = LibStub |
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9 | Arvak-118457 | LibStub.minor = LIBSTUB_MINOR |
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10 | Arvak-118457 | ||
11 | Arvak-118457 | function LibStub:NewLibrary(major, minor) |
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12 | Arvak-118457 | assert(type(major) == "string", "Bad argument #2 to `NewLibrary' (string expected)") |
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13 | Arvak-118457 | minor = assert(tonumber(strmatch(minor, "%d+")), "Minor version must either be a number or contain a number.") |
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14 | Arvak-118457 | ||
15 | Arvak-118457 | local oldminor = self.minors[major] |
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16 | Arvak-118457 | if oldminor and oldminor >= minor then return nil end |
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17 | Arvak-118457 | self.minors[major], self.libs[major] = minor, self.libs[major] or {} |
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18 | Arvak-118457 | return self.libs[major], oldminor |
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19 | Arvak-118457 | end |
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20 | Arvak-118457 | ||
21 | Arvak-118457 | function LibStub:GetLibrary(major, silent) |
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22 | Arvak-118457 | if not self.libs[major] and not silent then |
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23 | Arvak-118457 | error(("Cannot find a library instance of %q."):format(tostring(major)), 2) |
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24 | Arvak-118457 | end |
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25 | Arvak-118457 | return self.libs[major], self.minors[major] |
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26 | Arvak-118457 | end |
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27 | Arvak-118457 | ||
28 | Arvak-118457 | function LibStub:IterateLibraries() return pairs(self.libs) end |
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29 | Arvak-118457 | setmetatable(LibStub, { __call = LibStub.GetLibrary }) |
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30 | Arvak-118457 | end |