fix pessimistic upgrade operator for pre-1.0 versions

fixes #1

README.md

@@ -66,6 +66,8 @@ local v = require 'semver'
 
 Using `v` allows for the nice string syntax: `v'1.2.3-alpha'`.
 
+The `package.path` variable must be configured so that the folder in which middleclass.lua is copied is available, of course.
+
 Please make sure that you read the license, too (for your convenience it's now included at the beginning of the semver.lua file).
 
 # Notes about version comparison
@@ -84,7 +86,7 @@ Builds are ignored when calculating precedence: version 1.2.3 and 1.2.3+build5 a
 
 # Specs
 
-This project uses [`busted`](https://lunarmodules.github.io/busted/) for its specs. If you want to run the specs, you will have to install telescope first. Then just execute the following from the root inspect folder:
+This project uses "busted":http://olivinelabs.com/busted/ for its specs. If you want to run the specs, you will have to install telescope first. Then just execute the following from the root inspect folder:
 
 ```
 busted
@@ -102,6 +104,3 @@ busted
 * Fix several errors and inconsistencies in the way the comparisons where implemented.
 * Added a lot more tests to cover more edge cases when comparing versions
 
-## v.1.2.1
-* Fix error on pessimistic update operator when applied to a 0.x.x version
-

rockspecs/semver-1.2.1-1.rockspec

@@ -1,25 +0,0 @@
-package = "semver"
-version = "1.2.1-1"
-source = {
-   url = "git://github.com/kikito/semver.lua.git",
-}
-description = {
-   summary = "An implementation of semantic versioning (semver.org 2.0.0) in Lua",
-   detailed = [[
-      See details in http://semver.org
-   ]],
-   license = "MIT",
-   homepage = "https://github.com/kikito/semver.lua"
-}
-dependencies = {
-   "lua >= 5.1"
-}
-
-build = {
-  type = "none",
-  install = {
-    lua = {
-      "semver.lua"
-    },
-  }
-}

semver.lua

@@ -1,5 +1,5 @@
 local semver = {
-  _VERSION     = '1.2.1',
+  _VERSION     = '1.2.0',
   _DESCRIPTION = 'semver for Lua',
   _URL         = 'https://github.com/kikito/semver.lua',
   _LICENSE     = [[
@@ -15,7 +15,7 @@ local semver = {
     permit persons to whom the Software is furnished to do so, subject to
     the following conditions:
 
-    The above copyright notice and this permission notice shall be included
+    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
@@ -173,9 +173,7 @@ end
 -- 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
+  if self.major == 0 then return false end
-    return self == other
-  end
   return self.major == other.major and
          self.minor <= other.minor
 end

spec/semver_spec.lua

@@ -254,8 +254,6 @@ describe('semver', function()
   describe("^", function()
     it("true for self", function()
       assert.is_true(v(1,2,3) ^ v(1,2,3))
-      assert.is_true(v(0,1,0) ^ v(0,1,0))
-      assert.is_true(v("0.1.1+build0") ^ v(0,1,1))
     end)
     it("different major versions mean it's always unsafe", function()
       assert.is_false(v(2,0,0) ^ v(3,0,0))
@@ -275,15 +273,6 @@ describe('semver', function()
     it("is unsafe to downgrade to an earlier minor version", function()
       assert.is_false(v(1,5,0) ^ v(1,2,0))
     end)
-
-    it("is unsafe to upgrade any pre-1.0 versions", function()
-      assert.is_false(v("0.0.1-alpha") ^ v(0,0,1))
-      assert.is_false(v("0.0.1") ^ v(0,0,2))
-      assert.is_false(v("0.0.1+build0") ^ v(0,0,2))
-      assert.is_false(v(0,0,1) ^ v(0,1,0))
-      assert.is_false(v(0,0,1) ^ v(1,0,0))
-      assert.is_false(v(0,0,1) ^ v("1.0.0-alpha"))
-    end)
   end)
 
   describe("_VERSION", function()