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box: move mkversion into a separate module
This commit moves all code, related to working with versions and which was used in box/lua/upgrade.lua, into a separate module and exports it to Lua API as 'internal.version' This is needed, as in the following commit we start to broadcast the dd_version_id variable, which shows the version of schema, stored in _schema['version']. This module allows us to write a trigger for config module and avoid code duplication. Needed for tarantool#8978 NO_DOC=internal NO_TEST=<already tested> NO_CHANGELOG=internal
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,69 @@ | ||
| local bit = require('bit') | ||
| local ffi = require('ffi') | ||
|
|
||
| ffi.cdef([[ uint32_t box_dd_version_id(void); ]]) | ||
| local builtin = ffi.C | ||
|
|
||
| local mkversion_mt = { | ||
| __tostring = function(self) | ||
| return string.format('%s.%s.%s', self.major, self.minor, self.patch) | ||
| end, | ||
| __eq = function(lhs, rhs) | ||
| return lhs.id == rhs.id | ||
| end, | ||
| __lt = function(lhs, rhs) | ||
| return lhs.id < rhs.id | ||
| end, | ||
| } | ||
|
|
||
| local function mkversion_new(major, minor, patch) | ||
| local self = setmetatable({}, mkversion_mt) | ||
| self.major = major | ||
| self.minor = minor | ||
| self.patch = patch | ||
| self.id = bit.bor(bit.lshift(bit.bor(bit.lshift(major, 8), minor), 8), | ||
| patch) | ||
| return self | ||
| end | ||
|
|
||
| -- Parse string with version in format 'A.B.C' to version object. | ||
| local function mkversion_from_string(version) | ||
| local major, minor, patch = version:match('^(%d+)%.(%d+)%.(%d+)$') | ||
| if major == nil then | ||
| error('version should be in format A.B.C') | ||
| end | ||
| return mkversion_new(tonumber(major), tonumber(minor), tonumber(patch)) | ||
| end | ||
|
|
||
| local function mkversion_from_id(version_id) | ||
| local major = bit.band(bit.rshift(version_id, 16), 0xff) | ||
| local minor = bit.band(bit.rshift(version_id, 8), 0xff) | ||
| local patch = bit.band(version_id, 0xff) | ||
| return mkversion_new(major, minor, patch) | ||
| end | ||
|
|
||
| -- Schema version of the snapshot. | ||
| local function mkversion_get() | ||
| local version = builtin.box_dd_version_id() | ||
| return mkversion_from_id(version) | ||
| end | ||
|
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||
| local function mkversion_from_tuple(tuple) | ||
| local major, minor, patch = tuple:unpack(2, 4) | ||
| patch = patch or 0 | ||
| if major and minor and type(major) == 'number' and | ||
| type(minor) == 'number' and type(patch) == 'number' then | ||
| return mkversion_new(major, minor, patch) | ||
| end | ||
| return nil | ||
| end | ||
|
|
||
| return setmetatable({ | ||
| new = mkversion_new, | ||
| get = mkversion_get, | ||
| from_id = mkversion_from_id, | ||
| from_tuple = mkversion_from_tuple, | ||
| from_string = mkversion_from_string, | ||
| }, { | ||
| __call = function(self, ...) return mkversion_new(...) end; | ||
| }) |
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