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#!/usr/bin/env ruby
# First we define a bunch of code-generators, then at the end is a
# very neat and readable definition of the format of the YAML files.
require 'yaml'
def error(msg)
$stderr.puts "ERROR: #{msg}"
@err = 1
end
def warning(msg)
$stderr.puts "WARNING: #{msg}"
end
# Generic validators/formatters
def semiordered_list(cnt, validator)
lambda {|name,ary|
if ary.class != Array
error "`#{name}' must be a list"
else
ary.each_index{|i| ary[i] = validator.call("#{name}[#{i}]", ary[i])}
ary = ary.first(cnt).concat(ary.last(ary.count-cnt).sort)
end
ary
}
end
def unordered_list(validator)
semiordered_list(0, validator)
end
def _unknown(map_name, key)
error "Unknown item: #{map_name}[#{key.inspect}]"
0
end
def unordered_map1(validator)
lambda {|name,hash|
if hash.class != Hash
error "`#{name}' must be a map"
else
order = Hash[[*validator.keys.map.with_index]]
hash = Hash[hash.sort_by{|k,v| order[k] || _unknown(name,k) }]
hash.keys.each{|k|
hash[k] = validator[k].call("#{name}[#{k.inspect}]", hash[k])
}
end
hash
}
end
def unordered_map2(key_validator, val_validator)
lambda {|name,hash|
if hash.class != Hash
error "`#{name}' must be a map"
else
hash = Hash[hash.sort_by{|k,v| k}]
hash.keys.each{|k|
key_validator.call("#{name} key #{k.inspect}", k)
hash[k] = val_validator.call("#{name}[#{k.inspect}]", hash[k])
}
end
hash
}
end
string = lambda {|name,str|
if str.class != String
error "`#{name}' must be a string"
else
str
end
}
# Regular Expression String
def restring(re)
lambda {|name,str|
if str.class != String
error "`#{name}' must be a string"
else
unless re =~ str
error "`#{name}' does not match #{re.inspect}: #{str}"
end
str
end
}
end
# Specific validators/formatters
year = lambda {|name, num|
if num.class != Fixnum
error "`#{name}' must be a year"
else
if (num < 1900 || num > 3000)
error "`#{name}' is a number, but doesn't look like a year"
end
num
end
}
# This regex is taken from http://www.w3.org/TR/html5/forms.html#valid-e-mail-address
_email_regex = /^[a-zA-Z0-9.!\#$%&'*+\/=?^_`{|}~-]+@[a-zA-Z0-9](?:[a-zA-Z0-9-]{0,61}[a-zA-Z0-9])?(?:\.[a-zA-Z0-9](?:[a-zA-Z0-9-]{0,61}[a-zA-Z0-9])?)*$/
email_list = lambda {|name, ary|
if ary.class != Array
error "`#{name}' must be a list"
elsif ary.count > 1
preserve = 1
if ary.first.end_with?("@parabola.nu") and ary.count > 2
preserve = 2
end
ary = semiordered_list(preserve, restring(_email_regex)).call(name, ary)
end
ary
}
shell = lambda {|name, sh|
if sh.class != String
error "`#{name}' must be a string"
else
@valid_shells ||= open("/etc/shells").read.split("\n")
.find_all{|line| /^[^\#]/ =~ line}
unless @valid_shells.include?(sh)
warning "shell not listed in /etc/shells: #{sh}"
end
end
sh
}
# The format of the YAML files
format = unordered_map1(
{
"username" => restring(/^[a-z][a-z0-9]*$/),
"fullname" => string,
"email" => email_list,
"groups" => semiordered_list(1, string),
"pgp_keyid" => restring(/^[0-9A-F]{40}$/),
"pgp_revoked_keyids" => unordered_list(restring(/^[0-9A-F]{40}$/)),
"ssh_keys" => unordered_map2(string, string),
"shell" => shell,
"extra" => unordered_map1(
{
"alias" => string,
"other_contact" => string,
"roles" => string,
"website" => string,
"occupation" => string,
"yob" => year,
"location" => string,
"languages" => string,
"interests" => string,
"favorite_distros" => string,
})
})
@err = 0
user = format.call("user", YAML::load(STDIN))
if @err != 0
exit @err
end
print user.to_yaml
|
