Let Linter run on specified files

This lets us scope the files we're linting to those specified in the
command line call, e.g.

```
canvas lint blocks/gallery/block.html
```

Author: kylebyrne

lib/canvas/check.rb

@@ -11,7 +11,7 @@ def initialize
       @offenses = []
     end
 
-    def run
+    def run(scoped_files)
       raise NotImplementedError
     end
 

lib/canvas/checks/required_files_check.rb

@@ -12,7 +12,7 @@ class RequiredFilesCheck < Check
       "assets/index.css"
     ].freeze
 
-    def run
+    def run(scoped_files)
       REQUIRED_FILES.each do |filename|
         file_paths = Dir.glob(filename)
 

lib/canvas/checks/valid_block_schemas_check.rb

@@ -19,9 +19,9 @@ module Canvas
   # <p>My block HTML</p>
   #
   class ValidBlockSchemasCheck < Check
-    def run
+    def run(scoped_files)
       custom_types = Canvas::FetchCustomTypes.call
-      block_files.each do |filename|
+      block_files(scoped_files).each do |filename|
         front_matter = extract_front_matter(filename)
         next unless front_matter
 
@@ -32,8 +32,13 @@ def run
 
     private
 
-    def block_files
-      Dir.glob("blocks/**/*.{html,liquid}")
+    def block_files(scoped_files)
+      all_files = Dir.glob("blocks/**/*.{html,liquid}")
+      if scoped_files.any?
+        all_files & scoped_files
+      else
+        all_files
+      end
     end
 
     def validate_format(filename, front_matter)

lib/canvas/checks/valid_custom_types_check.rb

@@ -5,8 +5,8 @@ module Canvas
   # This check will validate the JSON objects that represent the
   # custom types that are defined in the /types directory.
   class ValidCustomTypesCheck < Check
-    def run
-      custom_type_files.each do |filename|
+    def run(scoped_files)
+      custom_type_files(scoped_files).each do |filename|
         schema = extract_json(filename)
         validator = Validator::CustomType.new(schema: schema)
 
@@ -22,8 +22,13 @@ def run
 
     private
 
-    def custom_type_files
-      Dir.glob("types/*.json")
+    def custom_type_files(scoped_files)
+      all_files = Dir.glob("types/*.json")
+      if scoped_files.any?
+        all_files & scoped_files
+      else
+        all_files
+      end
     end
 
     def extract_json(filename)

lib/canvas/checks/valid_footer_schema_check.rb

@@ -22,7 +22,8 @@ module Canvas
   # <p>My footer HTML</p>
   #
   class ValidFooterSchemaCheck < Check
-    def run
+    def run(scoped_files)
+      return unless scoped_files.include? footer_filename
       file = File.read(footer_filename)
       front_matter = extract_front_matter(file)
       validate_format(front_matter) &&

lib/canvas/checks/valid_html_check.rb

@@ -3,8 +3,8 @@
 module Canvas
   # :documented:
   class ValidHtmlCheck < Check
-    def run
-      html_files.each do |filename|
+    def run(scoped_files)
+      html_files(scoped_files).each do |filename|
         file = File.read(filename)
         validator = Validator::Html.new(file)
 
@@ -18,8 +18,13 @@ def run
       end
     end
 
-    def html_files
-      Dir.glob("**/*.{html,liquid}")
+    def html_files(scoped_files)
+      all_files = Dir.glob("**/*.{html,liquid}")
+      if scoped_files.any?
+        all_files & scoped_files
+      else
+        all_files
+      end
     end
   end
 end

lib/canvas/checks/valid_json_check.rb

@@ -3,8 +3,8 @@
 module Canvas
   # :documented:
   class ValidJsonCheck < Check
-    def run
-      json_files.each do |filename|
+    def run(scoped_files)
+      json_files(scoped_files).each do |filename|
         file = File.read(filename)
         validator = Validator::Json.new(file)
 
@@ -20,8 +20,13 @@ def run
 
     private
 
-    def json_files
-      Dir.glob("**/*.json")
+    def json_files(scoped_files)
+      all_files = Dir.glob("**/*.json")
+      if scoped_files.any?
+        all_files & scoped_files
+      else
+        all_files
+      end
     end
   end
 end

lib/canvas/checks/valid_liquid_check.rb

@@ -3,10 +3,10 @@
 module Canvas
   # :documented:
   class ValidLiquidCheck < Check
-    def run
+    def run(scoped_files)
       register_tags!
 
-      liquid_files.each do |filename|
+      liquid_files(scoped_files).each do |filename|
         file = File.read(filename)
         validator = Validator::Liquid.new(file)
 
@@ -22,8 +22,13 @@ def run
 
     private
 
-    def liquid_files
-      Dir.glob("**/*.{html,liquid}")
+    def liquid_files(scoped_files)
+      all_files = Dir.glob("**/*.{html,liquid}")
+      if scoped_files.any?
+        all_files & scoped_files
+      else
+        all_files
+      end
     end
 
     def register_tag(name, klass)

lib/canvas/checks/valid_menu_schema_check.rb

@@ -22,7 +22,8 @@ module Canvas
   # <p>My menu HTML</p>
   #
   class ValidMenuSchemaCheck < Check
-    def run
+    def run(scoped_files)
+      return unless scoped_files.include? menu_filename
       file = File.read(menu_filename)
       front_matter = extract_front_matter(file)
       validate_format(front_matter) &&

lib/canvas/checks/valid_sass_check.rb

@@ -6,8 +6,8 @@ module Canvas
   # This check will find all files ending in .css, .scss or .sass
   # and run them through the sass validator - {Canvas::Validator::Sass}.
   class ValidSassCheck < Check
-    def run
-      sass_files.each do |filename|
+    def run(scoped_files)
+      sass_files(scoped_files).each do |filename|
         file = File.read(filename)
         validator = Validator::Sass.new(file)
 
@@ -23,8 +23,13 @@ def run
 
     private
 
-    def sass_files
-      Dir.glob("**/*.{css,scss,sass}")
+    def sass_files(scoped_files)
+      all_files = Dir.glob("**/*.{css,scss,sass}")
+      if scoped_files.any?
+        all_files & scoped_files
+      else
+        all_files
+      end
     end
   end
 end