is a command line front-end for

library, which is an implementation 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 control.

is a part of

Prints the version of

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

Disables ruby code evaluation for lines beginning with

Specifies the safe level in which eRuby script will run.

Specifies trim mode (default 0).

can be one of

EOL remains after the embedded ruby script is evaluated.

EOL is removed if the line ends with

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

Load a library

can be one of Sets the default value for internal encodings

Turns on debug mode.

will be set to true.

Prints a summary of the options.

Used with

Prepends the line number to each line in the output.

Enables verbose mode.

will be set to true.

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

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

prints

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

And see

documentation for

class.

Security vulnerabilities should be reported via an email to

Reported problems will be published after being fixed.

Other bugs and feature requests can be reported via the Ruby Issue Tracking System

Do not report security vulnerabilities via this system because it publishes the vulnerabilities immediately.

Written by Masatoshi SEKI.