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ERB(1)		       Ruby Programmers Reference Guide			ERB(1)

NAME
     erb — Ruby Templating

SYNOPSIS
     erb [--version] [-UPdnvx] [-E ext[:int]] [-S level] [-T mode]
	 [-r library] [--] [file ...]

DESCRIPTION
     erb is a command line front-end for ERB library, which is an implementa‐
     tion of eRuby.

     ERB provides an easy to use but powerful templating system for Ruby.
     Using ERB, actual Ruby code can be added to any plain text document for
     the purposes of generating document information details and/or flow con‐
     trol.

     erb is a part of Ruby.

OPTIONS
     --version	    Prints the version of erb.

     -E external[:internal]
     --encoding external[:internal]
		    Specifies the default value(s) for external encodings and
		    internal encoding. Values should be separated with colon
		    (:).

		    You can omit the one for internal encodings, then the
		    value (Encoding.default_internal) will be nil.

     -P		    Evaluates lines starting with % as Ruby code and removes
		    the tailing EOLs.

     -S level	    Specifies the safe level in which eRuby script will run.

     -T mode	    Specifies trim mode (default 0).  mode can be one of

			  0	  EOL remains after the embedded ruby script
				  is evaluated.

			  1	  EOL is removed if the line ends with %>.

			  2	  EOL is removed if the line starts with <%
				  and ends with %>.

			  -	  EOL is removed if the line ends with -%>.
				  And leading whitespaces are removed if the
				  erb directive starts with <%-.

     -U		    can be one of Sets the default value for internal encod‐
		    ings (Encoding.default_internal) to UTF-8.

     -d
     --debug	    Turns on debug mode.  $DEBUG will be set to true.

     -h
     --help	    Prints a summary of the options.

     -n		    Used with -x.  Prepends the line number to each line in
		    the output.

     -v		    Enables verbose mode.  $VERBOSE will be set to true.

     -x		    Converts the eRuby script into Ruby script and prints it
		    without line numbers.

EXAMPLES
     Here is an eRuby script

	   <?xml version="1.0" ?>
	   <% require 'prime' -%>
	   <erb-example>
	     <calc><%= 1+1 %></calc>
	     <var><%= __FILE__ %></var>
	     <library><%= Prime.each(10).to_a.join(", ") %></library>
	   </erb-example>

     Command
	   % erb -T - example.erb
     prints

	   <?xml version="1.0" ?>
	   <erb-example>
	     <calc>2</calc>
	     <var>example.erb</var>
	     <library>2, 3, 5, 7</library>
	   </erb-example>

SEE ALSO
     ruby(1).

     And see ri(1) documentation for ERB class.

REPORTING BUGS
     Security vulnerabilities should be reported via an email to
     ⟨security@ruby-lang.org⟩.	Reported problems will be published after
     being fixed.

     And you can report other bugs and feature requests via the Ruby Issue
     Tracking System (http://bugs.ruby-lang.org).  Do not report security vul‐
     nerabilities via the system because it publishes the vulnerabilities
     immediately.

AUTHORS
     Written by Masatoshi SEKI.

UNIX			       November 15, 2012			  UNIX
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