Fix parsing of requirements without spaces

Author: ericmj

lib/hex/version.ex

@@ -105,7 +105,9 @@ defmodule Hex.Version do
 
   defp custom_requirement(requirement) do
     try do
-      req = String.split(requirement, " ", trim: true) |> custom_parse
+      req = String.split(requirement, " ", trim: true)
+            |> split_ops
+            |> custom_parse
       {:ok, %Requirement{source: requirement, req: req}}
     catch
       :error ->
@@ -130,6 +132,17 @@ defmodule Hex.Version do
   defp custom_parse(_),
     do: throw :error
 
+  def split_ops([op|rest]) when op in @version_ops,
+    do: [op|split_ops(rest)]
+  def split_ops([<<op::binary-2, version::binary>>|rest]) when op in @version_ops,
+    do: [op, version|split_ops(rest)]
+  def split_ops([<<op::binary-1, version::binary>>|rest]) when op in @version_ops,
+    do: [op, version|split_ops(rest)]
+  def split_ops([version|rest]),
+    do: [version|split_ops(rest)]
+  def split_ops([]),
+    do: []
+
   defp allow_pre? do
     Code.ensure_loaded?(Version) and function_exported?(Version, :match?, 3)
   end

test/hex/version_test.exs

@@ -12,4 +12,14 @@ defmodule Hex.VersionTest do
     refute V.match?("1.1.0-beta", ">= 1.0.0")
     assert V.match?("1.1.0-beta", ">= 1.0.0-beta")
   end
+
+  test "parse requirement" do
+    assert {:ok, _} = V.parse_requirement("1.0.0")
+    assert {:ok, _} = V.parse_requirement("== 1.0.0")
+    assert {:ok, _} = V.parse_requirement("==1.0.0")
+    assert {:ok, _} = V.parse_requirement("== 1.0.0 and == 1.0.0")
+    assert {:ok, _} = V.parse_requirement("==1.0.0 and ==1.0.0")
+
+    assert :error   = V.parse_requirement("foo")
+  end
 end