On Fri, Sep 14, 2012 at 10:36 PM, Dev Guy <devguy.ca / gmail.com> wrote:
> On Fri, Sep 14, 2012 at 9:46 PM, Dev Guy <devguy.ca / gmail.com> wrote:
>> Hey guys I am generating a file using erb and an input template file.
>>
>> def fileSafeCreateHeader( filename )
>>
>>   puts "RMake> Creating header file: " + filename
>>
>>   rmake_loc = File.expand_path( File.dirname( __FILE__ ) )
>>   lines = IO.readlines( "#{rmake_loc}/templates/title.trb" )
>>
>>   File.open( filename, "w+" ) do |f|
>>     expanded_line = ERB.new( lines.join("\n") , nil, "%<>" )
>>     f.puts expanded_line.result
>>   end
>>
>> end
>>
>> However when I run my script I get an error saying 'filename' is not
>> defined, when you can see it is! What's going on here?
>>
>> RMake> Creating header file: def.h
>> (erb):3:in `<main>': undefined local variable or method `filename' for
>> main:Object (NameError)
>>         from /usr/local/lib/ruby/1.9.1/erb.rb:838:in `eval'
>>         from /usr/local/lib/ruby/1.9.1/erb.rb:838:in `result'
>>
>
> OK I tried the following in IRB and I get the same type of error?
>
> root@karma:/opt/ruby-1.9.3-p194# irb
> irb(main):001:0> require 'erb'
> => true
> irb(main):002:0>
> irb(main):003:0* weekday = Time.now.strftime('%A')
> => "Friday"
> irb(main):004:0> simple_template = "Today is <%= weekday %>."
> => "Today is <%= weekday %>."
> irb(main):005:0>
> irb(main):006:0* renderer = ERB.new(simple_template)
> => #<ERB:0x000000033558b0 @safe_level=nil,
> @src="#coding:UTF-8\n_erbout = ''; _erbout.concat \"Today is \";
> _erbout.concat(( weekday ).to_s); _erbout.concat \".\";
> _erbout.force_encoding(__ENCODING__)", @enc=#<Encoding:UTF-8>,
> @filename=nil>
> irb(main):007:0> puts output = renderer.result()
> NameError: undefined local variable or method `weekday' for main:Object
>         from (erb):1:in `<main>'
>         from /usr/local/lib/ruby/1.9.1/erb.rb:838:in `eval'
>         from /usr/local/lib/ruby/1.9.1/erb.rb:838:in `result'
>         from (irb):7
>         from /usr/local/bin/irb:12:in `<main>'
> irb(main):008:0>
>
> What's am I missing??
>

OK it seems, for things to work I need to pass in 'binding' and make
the call like:

puts output = renderer.result(binding)

-- 
Kind Regards,
Rajinder Yadav

SafetyNet Test Driven Development
http://safetynet.devmentor.org