Add consistent option

docs/RULES.md

@@ -1023,7 +1023,7 @@ Tags: code
 
 Aliases: code-block-style
 
-Parameters: style ("fenced", "indented", default "fenced")
+Parameters: style ("fenced", "indented", "consistent", default "fenced")
 
 This rule is truggered what a different code block style is used than the
 configured one. For example, in the default configuration this triggers:

lib/mdl/rules.rb

@@ -656,8 +656,17 @@ def check_blockquote(errors, elements)
  aliases 'code-block-style'
  params :style => :fenced
  check do |doc|
+ style = @params[:style]
  doc.element_linenumbers(
  doc.find_type_elements(:codeblock).select do |i|
+ # for consistent we determine the first one
+ if style == :consistent
+ if doc.element_line(i).start_with?(" ")
+ style = :indented
+ else
+ style = :fenced
+ end
+ end
  if @params[:style] == :fenced
  doc.element_line(i).start_with?(" ")
  else

test/rule_tests/code_block_consistency.md

@@ -0,0 +1,11 @@
+This is text.
+
+ This is a
+ code block.
+
+And here is more text
+
+```
+and here is a different {MD046:8}
+code block
+```

test/rule_tests/code_block_consistency_style.rb

@@ -0,0 +1 @@
+rule 'MD046', :style => :consistent

test/rule_tests/code_block_fenced.md

@@ -0,0 +1,17 @@
+This is text.
+
+ This is a {MD046}
+ code block.
+
+And here is more text
+
+```
+This is a code block that won't trigger.
+```
+
+But we'll do another:
+
+ And this {MD046}
+ will.
+
+Final text is here

test/rule_tests/code_block_fenced_style.rb

@@ -0,0 +1 @@
+rule 'MD046', :style => :fenced

test/rule_tests/code_block_indented.md

@@ -0,0 +1,17 @@
+This is text.
+
+ This is a
+ code block.
+
+And here is more text
+
+```
+This is {MD046:8} also a code block.
+```
+
+But we'll do another:
+
+ And this
+ will.
+
+Final text is here

test/rule_tests/code_block_indented_style.rb

@@ -0,0 +1 @@
+rule 'MD046', :style => :indented