Remove comments from ruby source code?

Ruby
1

Dear Friends,
If there any pre-defined function or ruby options available
for removing the ruby comments from the source code. Please any on help
me if you already aware of this.

Regards,
S.Vellingiri.

2

On Sep 1, 4:12 am, Arul hari [email protected] wrote:

Dear Friends,
If there any pre-defined function or ruby options available
for removing the ruby comments from the source code. Please any on help
me if you already aware of this.

Regards,
S.Vellingiri.

Posted viahttp://www.ruby-forum.com/.

You should be able to use something like this to get rid of normal
comments (ā€œ#ā€):

http://pastie.org/601862

then you could call it like this:

remcom(ā€œfilename.rbā€)

-Dylan

3

On Sep 1, 10:10 am, Joel VanderWerf [email protected] wrote:

#{name} is my name
END

ā€“
vjoel : Joel VanderWerf : path berkeley edu : 510 665 3407

DOH! Canā€™t believe I forgot that! :slight_smile: This should work:

http://pastie.org/602035

Iā€™m sure there are plenty of other cases Iā€™ve missed, lemme know and I
can add em.

4

Dylan wrote:

You should be able to use something like this to get rid of normal
comments (ā€œ#ā€):

http://pastie.org/601862

This is a harder problemā€¦ what do you do about the following?

name = ā€œfredā€
puts <<END
#{name} is my name
END

5

At 2009-09-01 07:12AM, ā€œArul hariā€ wrote:

Dear Friends,
If there any pre-defined function or ruby options available
for removing the ruby comments from the source code. Please any on help
me if you already aware of this.

The ruby_parser and ruby2ruby gems will do this:

require 'ruby_parser'
require 'ruby2ruby'

code = <<END
# a class
class Simple
  # add the method "add"
  def add(n1,n2)
    n1 + n2  # return the sum
  end
end
END

parsed = Ruby2Ruby.new.process( RubyParser.new.process( code ))

puts parsed

results in:

class Simple
  def add(n1, n2)
    (n1 + n2)
  end
end
1 Like
6

On Sep 1, 2009, at 12:10 , Dylan wrote:

DOH! Canā€™t believe I forgot that! :slight_smile: This should work:

http://pastie.org/602035

Iā€™m sure there are plenty of other cases Iā€™ve missed, lemme know and I
can add em.

s = "

"

You need to actually parse the file.

7

Glenn J. wrote:

At 2009-09-01 07:12AM, ā€œArul hariā€ wrote:

Dear Friends,
If there any pre-defined function or ruby options available
for removing the ruby comments from the source code. Please any on help
me if you already aware of this.

The ruby_parser and ruby2ruby gems will do this:

require 'ruby_parser'
require 'ruby2ruby'

code = <<END
# a class
class Simple
  # add the method "add"
  def add(n1,n2)
    n1 + n2  # return the sum
  end
end
END

parsed = Ruby2Ruby.new.process( RubyParser.new.process( code ))

puts parsed

results in:

class Simple
  def add(n1, n2)
    (n1 + n2)
  end
end

Dear Friends,
Thanks to all for your prompt reply. It was really helpful to
me.

Regards,
S.Vellingiri.

1 Like
8

Arul hari wrote:

Glenn J. wrote:

At 2009-09-01 07:12AM, ā€œArul hariā€ wrote:

Dear Friends,
If there any pre-defined function or ruby options available
for removing the ruby comments from the source code. Please any on help
me if you already aware of this.

The ruby_parser and ruby2ruby gems will do this:

require 'ruby_parser'
require 'ruby2ruby'

code = <<END
# a class
class Simple
  # add the method "add"
  def add(n1,n2)
    n1 + n2  # return the sum
  end
end
END

parsed = Ruby2Ruby.new.process( RubyParser.new.process( code ))

puts parsed

results in:

class Simple
  def add(n1, n2)
    (n1 + n2)
  end
end

Dear Friends,
Thanks to all for your prompt reply. It was really helpful to
me.

Regards,
S.Vellingiri.

Dear Friends,
I am facing problem after removing comments.

#! => should not remove from the source code , but I am using
ruby2ruby module to remove the comments. Is there any way to not remove
the #! line.

Please anyone help me to go ahed on this. Kindly let me know it.

Regards,
S.vellingiri.

9

On 3/2/10, Arul hari [email protected] wrote:

Dear Friends,
I am facing problem after removing comments.

#! => should not remove from the source code , but I am using
ruby2ruby module to remove the comments. Is there any way to not remove
the #! line.

Please anyone help me to go ahed on this. Kindly let me know it.

The obvious thing to do is to special case the shebang line. Since a
shebang can only occur on the first line of a source file, just
examine the first line before munging the source and if itā€™s a
shebang, add it back after the munging is done.

Note that youā€™ll have the same issue with magic encoding lines as
well. A magic encoding line can also occur on the 1st line (or 2nd
line if the 1st line is a shebang) and should also be preserved if
present. (This is a ruby 1.9 only feature, tho. If ruby 1.9
compatibility is important to you, ruby2ruby isnā€™t going to work for
you for all kinds of other reasonsā€¦)

10

Glenn J. wrote in post #847746:

At 2009-09-01 07:12AM, ā€œArul hariā€ wrote:

Dear Friends,
If there any pre-defined function or ruby options available
for removing the ruby comments from the source code. Please any on help
me if you already aware of this.

The ruby_parser and ruby2ruby gems will do this:

require 'ruby_parser'
require 'ruby2ruby'

code = <<END
# a class
class Simple
  # add the method "add"
  def add(n1,n2)
    n1 + n2  # return the sum
  end
end
END

parsed = Ruby2Ruby.new.process( RubyParser.new.process( code ))

puts parsed

results in:

class Simple
  def add(n1, n2)
    (n1 + n2)
  end
end

Hi,

Sorry for bumping so old post but Iā€™m getting different result than
shown above. In my case I still see comments which are alone in the line
and comment which is following code is removed. Any idea why?
Iā€™m using ruby 1.9.3 with gems:
ruby2ruby (2.0.8)
ruby_parser (3.1.0)
sexp_processor (4.1.0)

11

Thx,
solution seems to fix some problems but still comment ā€˜# add the method
ā€œaddā€ā€™ isnā€™t stripped. But now it shall be enough to remove them with
RegExp, right?

12

Jakub S. wrote in post #1142466:

Sorry for bumping so old post but Iā€™m getting different result than
shown above. In my case I still see comments

this code do some patch to ruiby2ruiby , most comments are stripped :

require ā€˜ruby_parserā€™
require ā€˜ruby2rubyā€™

class Ruby2Ruby
def process_class(exp) ā€œclass #{util_module_or_class(exp, true)}ā€ end
def process_module(exp) ā€œmodule #{util_module_or_class(exp)}ā€ end
def indent(s) s end
end

src=ARGV.map {|f| ā€œfrom_file(ā€™#{f}ā€™)\nā€+File.read(f) }.join("\n\n")
puts Ruby2Ruby.new.process( RubyParser.new.process( ā€œdef from_file(e)
end\nā€+ src ))

some comments at begining of each files seem echoedā€¦