md-ruby-eval

Usage: #{$0} [options] --auto
       #{$0} [options] INPUT_FILE OUTPUT_FILE

Evaluates Ruby examples in MD files.

It looks for code blocks starting with '```ruby'. The blocks are evaluated in same order as they appear in the markdown file. Each top_level parseable piece of code is evaluated and the value is added as a comment, e.g.:

# Title

First evaluated block:

```ruby
a = 1 + 2
def a; :a; end #
[a,
 :b]
```

Continuing in next block

```ruby
a
```

becomes

# Title

First evaluated block:

```ruby
a = 1 + 2         # => 3
def a; :a; end
[a,
 :b]              # => [:a,:b]
```

Continuing in next block

```ruby
a                 # => 3
```

A parseable piece of code ended with '#' will be evaluated but it's result is not added to the output as a comment, which is useful for method and class definitions.

Example usage of --auto

• cd doc_dir go to directory with documentation

• ls list the files

  a.in.md
  a.init.rb
  b.in.md
  c.md
  

• md-ruby-eval --auto call the tool

  • Creates files a.out.md and b.out.md evaluating each in isolated environments, before a.out.md is evaluated a.init.md is required to setup its environment. c.md is ignored since it does not have in marker.