Allow calling #write more than once

lib/nanoc/rule_dsl/rule_context.rb

@@ -74,7 +74,10 @@ def snapshot(snapshot_name, path: nil)
     #
     # @return [void]
     def write(path)
-      snapshot(:last, path: path)
+      @_write_snapshot_counter ||= 0
+      snapshot_name = "_#{@_write_snapshot_counter}".to_sym
+      @_write_snapshot_counter += 1
+      snapshot(snapshot_name, path: path)
     end
   end
 end

spec/nanoc/regressions/gh_1037_spec.rb

@@ -0,0 +1,29 @@
+describe 'GH-1037', site: true, stdio: true do
+  before do
+    File.write('content/giraffe.md', 'I am a giraffe!')
+    File.write('content/donkey.erb', '[<%= @items["/giraffe.*"].compiled_content(snapshot: :last) %>]')
+
+    File.write('Rules', <<EOS)
+  compile '/donkey.erb' do
+    filter :erb
+    write '/donkey.txt'
+  end
+
+  compile '/giraffe.*' do
+    write '/giraffe.txt'
+    write '/giraffe.md'
+  end
+EOS
+  end
+
+  it 'writes two files' do
+    Nanoc::CLI.run(%w(compile))
+    expect(File.read('output/giraffe.txt')).to eql('I am a giraffe!')
+    expect(File.read('output/giraffe.md')).to eql('I am a giraffe!')
+  end
+
+  it 'has the right :last snapshot' do
+    Nanoc::CLI.run(%w(compile))
+    expect(File.read('output/donkey.txt')).to eql('[I am a giraffe!]')
+  end
+end

spec/nanoc/rule_dsl/rule_context_spec.rb

@@ -162,13 +162,26 @@
   end
 
   describe '#write' do
-    subject { rule_context.write(path) }
+    context 'calling once' do
+      subject { rule_context.write('/foo.html') }
 
-    let(:path) { '/foo.html' }
+      it 'makes a request to the executor' do
+        expect(executor).to receive(:snapshot).with(:_0, path: '/foo.html')
+        subject
+      end
+    end
 
-    it 'makes a request to the executor' do
-      expect(executor).to receive(:snapshot).with(:last, path: '/foo.html')
-      subject
+    context 'calling twice' do
+      subject do
+        rule_context.write('/foo.html')
+        rule_context.write('/bar.html')
+      end
+
+      it 'makes two requests to the executor with unique snapshot names' do
+        expect(executor).to receive(:snapshot).with(:_0, path: '/foo.html')
+        expect(executor).to receive(:snapshot).with(:_1, path: '/bar.html')
+        subject
+      end
     end
   end
 end