Merge pull request #1056 from nanoc/snapshot-eh

Add #snapshot?

lib/nanoc/base/entities/item_rep.rb

@@ -44,6 +44,11 @@ def initialize(item, name)
       @compiled = false
     end
 
+    contract Symbol => C::Bool
+    def snapshot?(name)
+      snapshot_defs.any? { |sd| sd.name == name }
+    end
+
     contract C::KeywordArgs[snapshot: C::Optional[Symbol]] => C::Maybe[String]
     # Returns the item rep’s raw path. It includes the path to the output
     # directory and the full filename.

lib/nanoc/base/views/item_rep_view.rb

@@ -46,6 +46,11 @@ def compiled_content(snapshot: nil)
       @context.snapshot_repo.compiled_content(rep: unwrap, snapshot: snapshot)
     end
 
+    def snapshot?(name)
+      @context.dependency_tracker.bounce(unwrap.item, compiled_content: true)
+      @item_rep.snapshot?(name)
+    end
+
     # Returns the item rep’s path, as used when being linked to. It starts
     # with a slash and it is relative to the output directory. It does not
     # include the path to the output directory. It will not include the

spec/nanoc/base/entities/item_rep_spec.rb

@@ -1,4 +1,24 @@
 describe Nanoc::Int::ItemRep do
   let(:item) { Nanoc::Int::Item.new('asdf', {}, '/foo.md') }
   let(:rep) { Nanoc::Int::ItemRep.new(item, :giraffe) }
+
+  describe '#snapshot?' do
+    subject { rep.snapshot?(snapshot_name) }
+
+    let(:snapshot_name) { raise 'override me' }
+
+    before do
+      rep.snapshot_defs = [Nanoc::Int::SnapshotDef.new(:donkey)]
+    end
+
+    context 'snapshot does not exist' do
+      let(:snapshot_name) { :giraffe }
+      it { is_expected.not_to be }
+    end
+
+    context 'snapshot exists' do
+      let(:snapshot_name) { :donkey }
+      it { is_expected.to be }
+    end
+  end
 end

spec/nanoc/base/views/item_rep_view_spec.rb

@@ -137,6 +137,73 @@
     it { should == described_class.hash ^ Nanoc::Identifier.new('/foo/').hash ^ :jacques.hash }
   end
 
+  describe '#snapshot?' do
+    subject { view.snapshot?(snapshot_name) }
+
+    let(:view) { described_class.new(rep, view_context) }
+
+    let(:rep) do
+      Nanoc::Int::ItemRep.new(item, :default).tap do |ir|
+        ir.compiled = true
+        ir.snapshot_defs = [
+          Nanoc::Int::SnapshotDef.new(:last),
+        ]
+      end
+    end
+
+    let(:item) do
+      Nanoc::Int::Item.new('content', {}, '/asdf.md')
+    end
+
+    let(:snapshot_name) { raise 'override me' }
+
+    before do
+      snapshot_repo.set(rep, :last, Nanoc::Int::TextualContent.new('Hallo'))
+    end
+
+    context 'snapshot exists' do
+      let(:snapshot_name) { :last }
+
+      it 'creates a dependency' do
+        expect { subject }.to change { dependency_store.objects_causing_outdatedness_of(base_item) }.from([]).to([item])
+      end
+
+      it 'creates a dependency with the right props' do
+        subject
+        dep = dependency_store.dependencies_causing_outdatedness_of(base_item)[0]
+
+        expect(dep.props.compiled_content?).to eq(true)
+
+        expect(dep.props.raw_content?).to eq(false)
+        expect(dep.props.attributes?).to eq(false)
+        expect(dep.props.path?).to eq(false)
+      end
+
+      it { is_expected.to be }
+    end
+
+    context 'snapshot does not exist' do
+      let(:snapshot_name) { :donkey }
+
+      it 'creates a dependency' do
+        expect { subject }.to change { dependency_store.objects_causing_outdatedness_of(base_item) }.from([]).to([item])
+      end
+
+      it 'creates a dependency with the right props' do
+        subject
+        dep = dependency_store.dependencies_causing_outdatedness_of(base_item)[0]
+
+        expect(dep.props.compiled_content?).to eq(true)
+
+        expect(dep.props.raw_content?).to eq(false)
+        expect(dep.props.attributes?).to eq(false)
+        expect(dep.props.path?).to eq(false)
+      end
+
+      it { is_expected.not_to be }
+    end
+  end
+
   describe '#compiled_content' do
     subject { view.compiled_content }