core: BoxCollection can find with version constraints

lib/vagrant/box_collection.rb

@@ -229,42 +229,40 @@ module Vagrant
     #
     # @param [String] name Name of the box (logical name).
     # @param [Array] providers Providers that the box implements.
+    # @param [String] version Version constraints to adhere to. Example:
+    #   "~> 1.0" or "= 1.0, ~> 1.1"
     # @return [Box] The box found, or `nil` if not found.
-    def find(name, providers)
-      providers = [providers].flatten
+    def find(name, providers, version)
+      providers = Array(providers)
+
+      # Build up the requirements we have
+      requirements = version.split(",").map do |v|
+        Gem::Requirement.new(v.strip)
+      end
 
       with_collection_lock do
-        providers.each do |provider|
-          # First look directly for the box we're asking for.
-          box_directory = @directory.join(name, provider.to_s, "metadata.json")
-          @logger.info("Searching for box: #{name} (#{provider}) in #{box_directory}")
-          if box_directory.file?
-            @logger.info("Box found: #{name} (#{provider})")
-            return Box.new(name, provider, box_directory.dirname)
-          end
-
-          # If we're looking for a VirtualBox box, then we check if there is
-          # a V1 box.
-          if provider.to_sym == :virtualbox
-            # Check if a V1 version of this box exists, and if so, raise an
-            # exception notifying the caller that the box exists but needs
-            # to be upgraded. We don't do the upgrade here because it can be
-            # a fairly intensive activity and don't want to immediately degrade
-            # user performance on a find.
-            #
-            # To determine if it is a V1 box we just do a simple heuristic
-            # based approach.
-            @logger.info("Searching for V1 box: #{name}")
-            if v1_box?(@directory.join(name))
-              @logger.warn("V1 box found: #{name}")
-              raise Errors::BoxUpgradeRequired, :name => name
-            end
-          end
-        end
-      end
-
-      # Didn't find it, return nil
+        box_directory = @directory.join(name)
+        if !box_directory.directory?
           @logger.info("Box not found: #{name} (#{providers.join(", ")})")
+          return nil
+        end
+
+        box_directory.children(true).each do |versiondir|
+          version = versiondir.basename.to_s
+          if !requirements.all? { |r| r.satisfied_by?(Gem::Version.new(version)) }
+            # Unsatisfied version requirements
+            next
+          end
+
+          providers.each do |provider|
+            provider_dir = versiondir.join(provider.to_s)
+            next if !provider_dir.directory?
+            @logger.info("Box found: #{name} (#{provider})")
+            return Box.new(name, provider, provider_dir)
+          end
+        end
+      end
+
       nil
     end
 

test/unit/vagrant/box_collection_test.rb

@@ -41,37 +41,45 @@ describe Vagrant::BoxCollection do
     end
   end
 
-  describe "finding" do
-    it "should return nil if the box does not exist" do
-      instance.find("foo", :i_dont_exist).should be_nil
+  describe "#find" do
+    it "returns nil if the box does not exist" do
+      expect(subject.find("foo", :i_dont_exist, ">= 0")).to be_nil
     end
 
-    it "should return a box if the box does exist" do
+    it "returns a box if the box does exist" do
       # Create the "box"
-      environment.box2("foo", :virtualbox)
+      environment.box3("foo", "0", :virtualbox)
 
       # Actual test
-      result = instance.find("foo", :virtualbox)
-      result.should_not be_nil
-      result.should be_kind_of(box_class)
-      result.name.should == "foo"
+      result = subject.find("foo", :virtualbox, ">= 0")
+      expect(result).to_not be_nil
+      expect(result).to be_kind_of(box_class)
+      expect(result.name).to eq("foo")
     end
 
-    it "should throw an exception if it is a v1 box" do
-      # Create a V1 box
-      environment.box1("foo")
+    it "can satisfy complex constraints" do
+      # Create the "box"
+      environment.box3("foo", "0.1", :virtualbox)
+      environment.box3("foo", "1.0", :virtualbox)
+      environment.box3("foo", "2.1", :virtualbox)
 
-      # Test!
-      expect { instance.find("foo", :virtualbox) }.
-        to raise_error(Vagrant::Errors::BoxUpgradeRequired)
+      # Actual test
+      result = subject.find("foo", :virtualbox, ">= 0.9, < 1.5")
+      expect(result).to_not be_nil
+      expect(result).to be_kind_of(box_class)
+      expect(result.name).to eq("foo")
+      # TODO: test version
     end
 
-    it "should return nil if there is a V1 box but we're looking for another provider" do
-      # Create a V1 box
-      environment.box1("foo")
+    it "returns nil if a box's constraints can't be satisfied" do
+      # Create the "box"
+      environment.box3("foo", "0.1", :virtualbox)
+      environment.box3("foo", "1.0", :virtualbox)
+      environment.box3("foo", "2.1", :virtualbox)
 
-      # Test
-      instance.find("foo", :another_provider).should be_nil
+      # Actual test
+      result = subject.find("foo", :virtualbox, "> 1.0, < 1.5")
+      expect(result).to be_nil
     end
   end