erb — Ruby Templating

       Written by Masatoshi SEKI.

UNIX                                            December 16, 2018                                         ERB(1)

erb is a command line front-end for ERB 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.

       erb is a part of Ruby.

       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>

       erb — Ruby Templating

--version      Prints the version of erb.

       -Eexternal[:internal]
       --encodingexternal[: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)
                      willbenil.-P             Disables ruby code evaluation for lines beginning with %.

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

       -Tmode        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 <%-.

       -r             Load a library

       -U             can be one of Sets the default value for internal encodings (Encoding.default_internal) toUTF-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.

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

       •   Other  bugs  and  feature  requests  can  be  reported   via   the   Ruby   Issue   Tracking   System
           (https://bugs.ruby-lang.org/).   Do  not  report  security vulnerabilities via this system because it
           publishes the vulnerabilities immediately.

ruby(1).

       And see ri(1) documentation for ERB class.

erb [--version] [-UPdnvx] [-Eext[:int]] [-Slevel] [-Tmode] [-rlibrary] [--] [file ...]