Parse ini file w/o rubygem inifile

Ruby
1

Very noob question :slight_smile:

I have this file
users_properties.cfg

[user1]
command1 = cmdA
command2 = cmdB
command3 = cmdC

[user2]
command1 = NA

To do something like: foreach [section] => param = value

Before someone recommend me : rubygem inifile, puppetmaster + clients , none of them have internet access, + I’ve been prohibited to install any 3rd party applications/module from internet w/o special permission, so, I just have to reinvent the wheel…

2

Hi @fritz001,
actually it’s not that noob of a question :slight_smile:

What you’re looking for is a regular expression.

A regular expression lets you define a pattern of text that you want to match.

This INI file follows a specific pattern.

Using a regular expression you can match the pattern & extract the data into Ruby objects so you can work with the data. We call this “parsing”.

3

Ok, I’ve got my inspiration from **[parseconfig] gem :slight_smile:

require 'fileutils'
@data = {}
section = nil
cmds = []

File.readlines('/root/users_prop.ini').each do |line|
        line = line.chomp
        unless (/^\#/.match(line))
         if (line =~ /^\[(.*)\]\s*$/)
                section = $1
                @data[section] = {}
                 next
         end
         if (line =~ /^([^=]+?)\s*=\s*(.*?)\s*$/)
                param, val = line.split(/\s*=\s*/, 2)
                if  !section
                       next
                end
                var_name = "#{param}".chomp.strip
                val      = val.chomp.strip
                @data[section][var_name] = val
         end
        end
end
@data.each do |k,hash|
        puts "~~~ #{k} ~~~"
        hash.each do |a,b|
                  puts a+" ===> "+ b
        end
end

P.S. It dosn’t look for me like regex search !!

4

This:

/^\[(.*)\]\s*$/

And this:

/^([^=]+?)\s*=\s*(.*?)\s*$/

And this:

/\s*=\s*/

Are ALL regular expressions :slight_smile: