Add `dirname` to image hashes. Closes #5.

README.md

@@ -50,6 +50,7 @@ responsive_image:
   # relative path.
   #
   # Parameters available are:
+  #   %{dirname}     Directory path of the file (assets/foo/some-file.jpg => assets/foo)
   #   %{basename}    Basename of the file (assets/some-file.jpg => some-file.jpg)
   #   %{filename}    Basename without the extension (assets/some-file.jpg => some-file)
   #   %{extension}   Extension of the file (assets/some-file.jpg => jpg)
@@ -168,5 +169,6 @@ Image objects (like `original` and each object in `resized`) contain the followi
 | `width`     | Integer | The width of the image.                                                 |
 | `height`    | Integer | The height of the image.                                                |
 | `basename`  | String  | Basename of the file (`assets/some-file.jpg` => `some-file.jpg`).       |
+| `dirname`   | String  | Directory name of the file (`assets/some/file.jpg` => `assets/some`).   |
 | `filename`  | String  | Basename without the extension (`assets/some-file.jpg` => `some-file`). |
 | `extension` | String  | Extension of the file (`assets/some-file.jpg` => `jpg`).                |

features/image-generation.feature

@@ -0,0 +1,35 @@
+Feature: Responsive image generation
+  As a Jekyll user
+  I want to generate responsive images
+  In order to use them on my pages
+
+  Scenario: Resizing images
+    Given I have a responsive_image configuration with:
+      """
+        template: _includes/responsive-image.html
+        sizes:
+          - width: 100
+      """
+
+    And I have a file "index.html" with "{% responsive_image path: assets/test.png alt: Foobar %}"
+    When I run Jekyll
+    Then the image "assets/resized/test-100x50.png" should have the dimensions "100x50"
+
+  Scenario: Handling subdirectories
+    Given I have a responsive_image configuration with:
+      """
+        template: _includes/responsive-image.html
+        output_path_format: "%{dirname}/resized/%{filename}-%{width}.%{extension}"
+        sizes:
+          - width: 100
+      """
+
+    And I have a file "index.html" with:
+      """
+        {% responsive_image path: assets/test.png %}
+        {% responsive_image path: assets/subdir/test.png %}
+      """
+
+    When I run Jekyll
+    Then the file "assets/resized/test-100.png" should exist
+    And the file "assets/subdir/resized/test-100.png" should exist

features/step_definitions/jekyll_steps.rb

@@ -36,6 +36,12 @@ Then /^the file "(.+)" should exist$/ do |path|
   assert File.exists?(path)
 end
 
+Then /^the image "(.+)" should have the dimensions "(\d+)x(\d+)"$/ do |path, width, height|
+  img = Magick::Image::read(path).first
+  assert_equal "#{width}x#{height}", "#{img.columns}x#{img.rows}"
+  img.destroy!
+end
+
 def write_file(path, contents)
   File.open(path, 'w') do |f|
     f.write(contents)

lib/jekyll/responsive_image/utils.rb

@@ -18,6 +18,7 @@ module Jekyll
       def image_hash(path, width, height)
         {
           'path'      => path,
+          'dirname'   => File.dirname(path),
           'basename'  => File.basename(path),
           'filename'  => File.basename(path, '.*'),
           'extension' => File.extname(path).delete('.'),