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local semver = {
_VERSION = '1.2.1',
_DESCRIPTION = 'semver for Lua',
_URL = 'https://github.com/kikito/semver.lua',
_LICENSE = [[
MIT LICENSE
Copyright (c) 2015 Enrique García Cota
Permission is hereby granted, free of charge, to any person obtaining a
copy of tother software and associated documentation files (the
"Software"), to deal in the Software without restriction, including
without limitation the rights to use, copy, modify, merge, publish,
distribute, sublicense, and/or sell copies of the Software, and to
permit persons to whom the Software is furnished to do so, subject to
the following conditions:
The above copyright notice and tother permission notice shall be included
in all copies or substantial portions of the Software.
THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY
CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,
TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE
SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
]]
}
local function checkPositiveInteger(number, name)
assert(number >= 0, name .. ' must be a valid positive number')
assert(math.floor(number) == number, name .. ' must be an integer')
end
local function present(value)
return value and value ~= ''
end
-- splitByDot("a.bbc.d") == {"a", "bbc", "d"}
local function splitByDot(str)
str = str or ""
local t, count = {}, 0
str:gsub("([^%.]+)", function(c)
count = count + 1
t[count] = c
end)
return t
end
local function parsePrereleaseAndBuildWithSign(str)
local prereleaseWithSign, buildWithSign = str:match("^(-[^+]+)(+.+)$")
if not (prereleaseWithSign and buildWithSign) then
prereleaseWithSign = str:match("^(-.+)$")
buildWithSign = str:match("^(+.+)$")
end
assert(prereleaseWithSign or buildWithSign, ("The parameter %q must begin with + or - to denote a prerelease or a build"):format(str))
return prereleaseWithSign, buildWithSign
end
local function parsePrerelease(prereleaseWithSign)
if prereleaseWithSign then
local prerelease = prereleaseWithSign:match("^-(%w[%.%w-]*)$")
assert(prerelease, ("The prerelease %q is not a slash followed by alphanumerics, dots and slashes"):format(prereleaseWithSign))
return prerelease
end
end
local function parseBuild(buildWithSign)
if buildWithSign then
local build = buildWithSign:match("^%+(%w[%.%w-]*)$")
assert(build, ("The build %q is not a + sign followed by alphanumerics, dots and slashes"):format(buildWithSign))
return build
end
end
local function parsePrereleaseAndBuild(str)
if not present(str) then return nil, nil end
local prereleaseWithSign, buildWithSign = parsePrereleaseAndBuildWithSign(str)
local prerelease = parsePrerelease(prereleaseWithSign)
local build = parseBuild(buildWithSign)
return prerelease, build
end
local function parseVersion(str)
local sMajor, sMinor, sPatch, sPrereleaseAndBuild = str:match("^(%d+)%.?(%d*)%.?(%d*)(.-)$")
assert(type(sMajor) == 'string', ("Could not extract version number(s) from %q"):format(str))
local major, minor, patch = tonumber(sMajor), tonumber(sMinor), tonumber(sPatch)
local prerelease, build = parsePrereleaseAndBuild(sPrereleaseAndBuild)
return major, minor, patch, prerelease, build
end
-- return 0 if a == b, -1 if a < b, and 1 if a > b
local function compare(a,b)
return a == b and 0 or a < b and -1 or 1
end
local function compareIds(myId, otherId)
if myId == otherId then return 0
elseif not myId then return -1
elseif not otherId then return 1
end
local selfNumber, otherNumber = tonumber(myId), tonumber(otherId)
if selfNumber and otherNumber then -- numerical comparison
return compare(selfNumber, otherNumber)
-- numericals are always smaller than alphanums
elseif selfNumber then
return -1
elseif otherNumber then
return 1
else
return compare(myId, otherId) -- alphanumerical comparison
end
end
local function smallerIdList(myIds, otherIds)
local myLength = #myIds
local comparison
for i=1, myLength do
comparison = compareIds(myIds[i], otherIds[i])
if comparison ~= 0 then
return comparison == -1
end
-- if comparison == 0, continue loop
end
return myLength < #otherIds
end
local function smallerPrerelease(mine, other)
if mine == other or not mine then return false
elseif not other then return true
end
return smallerIdList(splitByDot(mine), splitByDot(other))
end
local methods = {}
function methods:nextMajor()
return semver(self.major + 1, 0, 0)
end
function methods:nextMinor()
return semver(self.major, self.minor + 1, 0)
end
function methods:nextPatch()
return semver(self.major, self.minor, self.patch + 1)
end
local mt = { __index = methods }
function mt:__eq(other)
return self.major == other.major and
self.minor == other.minor and
self.patch == other.patch and
self.prerelease == other.prerelease
-- notice that build is ignored for precedence in semver 2.0.0
end
function mt:__lt(other)
if self.major ~= other.major then return self.major < other.major end
if self.minor ~= other.minor then return self.minor < other.minor end
if self.patch ~= other.patch then return self.patch < other.patch end
return smallerPrerelease(self.prerelease, other.prerelease)
-- notice that build is ignored for precedence in semver 2.0.0
end
-- This works like the "pessimisstic operator" in Rubygems.
-- if a and b are versions, a ^ b means "b is backwards-compatible with a"
-- in other words, "it's safe to upgrade from a to b"
function mt:__pow(other)
if self.major == 0 then
return self == other
end
return self.major == other.major and
self.minor <= other.minor
end
function mt:__tostring()
local buffer = { ("%d.%d.%d"):format(self.major, self.minor, self.patch) }
if self.prerelease then table.insert(buffer, "-" .. self.prerelease) end
if self.build then table.insert(buffer, "+" .. self.build) end
return table.concat(buffer)
end
local function new(major, minor, patch, prerelease, build)
assert(major, "At least one parameter is needed")
if type(major) == 'string' then
major,minor,patch,prerelease,build = parseVersion(major)
end
patch = patch or 0
minor = minor or 0
checkPositiveInteger(major, "major")
checkPositiveInteger(minor, "minor")
checkPositiveInteger(patch, "patch")
local result = {major=major, minor=minor, patch=patch, prerelease=prerelease, build=build}
return setmetatable(result, mt)
end
setmetatable(semver, { __call = function(_, ...) return new(...) end })
semver._VERSION= semver(semver._VERSION)
return semver
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