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README.md

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Checking Files

In order to check files, first we have to read them. In order to do that we are going to create a simple helper function:

-spec check_file(string()) -> sheldon_result:result().
check_file(Path) ->
  {ok, Bin} = file:read_file(Path),
  sheldon:check(Bin).

Now we can check some files stored on disk. For example:

1> example:check_file("files/romeo_juliet.txt").
#{bazinga => "I have never said that you are not good at what you do. It's just that what you do is not worth doing.",
  misspelled_words => [#{line_number => 7,word => "+"},
   #{line_number => 7,word => "MTV-inspired"},
   #{line_number => 7,word => "Luhrmann"},
   #{line_number => 7,word => "Baz"},
   #{line_number => 7,word => "Zeffirelli"},
   #{line_number => 7,word => "Cukor"},
   #{line_number => 7,word => "21st"},
   #{line_number => 7,word => "20th"},
   #{line_number => 7,word => "Gielgud"},
   #{line_number => 7,word => "Cushman"},
   #{line_number => 7,word => "19th"},
   #{line_number => 7,word => "Julie"},
   #{line_number => 7,word => "und"},
   #{line_number => 7,word => "Georg"},
   #{line_number => 7,word => "18th-century"},
   #{line_number => 7,word => "Davenant"},
   #{line_number => 5,word => "sub-plots"},
   #{line_number => 3,word => "Mercutio"},
   #{line_number => 3,word => "Brooke"},
   #{line_number => 3,word => "Romeus"}]}

We see some names and words which are actually understood but there aren't on our dictionary. We can skip those improving a little our helper function including a config map as a parameter:

-spec check_file(string(), sheldon_config:config()) -> sheldon_result:result().
check_file(Path, Config) ->
 {ok, Bin} = file:read_file(Path),
 sheldon:check(Bin, Config).

try again

1> Config = #{ignore_words => ["MTV-inspired", "Luhrmann", "Gielgud", "Cushman", "18th-century", "sub-plots"]}.
#{ignore_words => ["MTV-inspired","Luhrmann","Gielgud","Cushman",
  "18th-century","sub-plots"]}
2> example:check_file("files/romeo_juliet.txt", Config).
#{bazinga => "Too bad Leonard",
 misspelled_words => [#{line_number => 7,word => "+"},
  #{line_number => 7,word => "Baz"},
  #{line_number => 7,word => "Zeffirelli"},
  #{line_number => 7,word => "Cukor"},
  #{line_number => 7,word => "21st"},
  #{line_number => 7,word => "20th"},
  #{line_number => 7,word => "19th"},
  #{line_number => 7,word => "Julie"},
  #{line_number => 7,word => "und"},
  #{line_number => 7,word => "Georg"},
  #{line_number => 7,word => "Davenant"},
  #{line_number => 3,word => "Mercutio"},
  #{line_number => 3,word => "Brooke"},
  #{line_number => 3,word => "Romeus"}]}

Pretty easy with text files, right? But what if we try to check the current README file? lets try and see what happens...

6> example:check_file("README.md").
#{bazinga => "Too bad Leonard",
  misspelled_words => [#{line_number => 63,word => "README"},
   #{line_number => 61,word => "=>"},
   #{line_number => 61,word => "=>"},
   #{line_number => 61,word => "#"},
   #{line_number => 60,word => "=>"},
   #{line_number => 60,word => "=>"},
   #{line_number => 60,word => "#"},
   #{line_number => 59,word => "=>"},
   #{line_number => 59,word => "=>"},
   #{line_number => 59,word => "#"},
   #{line_number => 58,word => "=>"},
   #{line_number => 58,word => "=>"},
   #{line_number => 58,word => "#"},
   #{line_number => 57,word => "=>"},
   #{line_number => 57,word => "=>"},
   #{line_number => 57,word => "#"},
   #{line_number => 56,word => "=>"},
   #{line_number => 56,word => "=>"},
   #{line_number => 56,word => "#"},
   #{line_number => 55,word => "=>"},
   #{line_number => 55,word => "=>"},
   #{line_number => 55,word => "#"},
   #{line_number => 54,word => "=>"},
   #{line_number => 54,word => "=>"},
   #{line_number => 54,word => [...]},
   #{line_number => 53,...},
   #{...}|...]}

It doesn't look good, does it? 'sheldon' is complaining about the erlang code (obviously, no dictionary has Erlang terms...) what can we do?

Using Pattern blocks

In order to fix our problem with Erlang code sheldon allows us to escape blocks of text using regex expressions for start/end blocks, lets try. If you see the raw version of this README, we have to escape blocks starting by "```erlang" and finishing by "```""

8> Config = #{ignore_blocks => [#{open => "^```erlang", close => "```"}]}.
#{ignore_blocks => [#{close => "```",open => "^```erlang"}]}
9> example:check_file("README.md", Config).
#{bazinga => "The only way you'd be able to make a contribution to science is if they resume sending chimps into space.",
  misspelled_words => [#{line_number => 97,word => "README"},
   #{line_number => 97,word => "start/end"},
   #{line_number => 97,word => "regex"},
   #{line_number => 97,word => "Erlang"},
   #{line_number => 96,word => "#"},
   #{line_number => 95,word => "Erlang"},
   #{line_number => 95,word => "erlang"},
   #{line_number => 63,word => "README"},
   #{line_number => 34,word => "config"},
   #{line_number => 1,word => "#"}]}

Much better, right?