Re: [Puppet Users] Parsing key/value pairs in ruby
I based my bad first ruby code on http://www.devco.net/archives/2008/04/17/easy_per-machine_custom_facts_ for_puppet.php I just checked the URL, and Volcane admits the code was bad too - so have a look at http://www.devco.net/archives/2008/06/16/rework_of_puppet_facts_for_etcfactstxt.php John On 12 August 2010 14:33, Patrick Mohr kc7...@gmail.com wrote: I'm making a provider for cups and I need to parse a string into arbitrary key/value pairs. The string looks like this: printer-make-and-model='Brother HL-2060 Foomatic/hpijs-pcl5e (recommended)' printer-state=3 printer-state-change-time=1266621145 printer-state-reasons=none printer-type=8564756 I know almost no ruby. Any advice for what functions or data structures I want to use? It looks like split might be what I want to use for parsing, but the quoted strings will give me trouble. For the first version, I'm only using 3 of the values. Do I just want to pull out those manually instead of parsing the whole string? -- You received this message because you are subscribed to the Google Groups Puppet Users group. To post to this group, send email to puppet-us...@googlegroups.com. To unsubscribe from this group, send email to puppet-users+unsubscr...@googlegroups.compuppet-users%2bunsubscr...@googlegroups.com . For more options, visit this group at http://groups.google.com/group/puppet-users?hl=en. -- John Warburton Ph: 0417 299 600 Email: jwarbur...@gmail.com -- You received this message because you are subscribed to the Google Groups Puppet Users group. To post to this group, send email to puppet-us...@googlegroups.com. To unsubscribe from this group, send email to puppet-users+unsubscr...@googlegroups.com. For more options, visit this group at http://groups.google.com/group/puppet-users?hl=en.
Re: [Puppet Users] Parsing key/value pairs in ruby
Excerpts from Paul Nasrat's message of Thu Aug 12 06:45:52 -0700 2010:
You might use shellwords to handle the quoting.
require 'shellwords'
l = %q(printer-make-and-model='Brother HL-2060 Foomatic/hpijs-pcl5e
(recommended)' printer-state=3 printer-state-change-time=1266621145
printer-state-reasons=none printer-type=8564756)
Shellwords.shellwords(l)
= [printer-make-and-model=Brother HL-2060 Foomatic/hpijs-pcl5e
(recommended), printer-state=3,
printer-state-change-time=1266621145, printer-state-reasons=none,
printer-type=8564756]
Paul
Paul, shellwords.rb is one of the many great but little-known Ruby
standard library tools. Going a little further, we can turn a string of
shell-quoted key/value pairs separated by an '=' into a hash using:
require 'shellwords'
shellwords = Shellwords.shellwords(your_string)
pairs = shellwords.map{ |s| s.split('=', 2) }.flatten
Hash[*pairs]
This may be a little daunting, so let's break it down:
1) shellwords = Shellwords.shellwords(your_string) turns the string into
an array of tokens, assuming it's been assigned to your_string.
2) pairs.map{|s| s.split('=', 2)} takes each string in turn and splits
it on the first '=', returning a new array containing arrays of
[before-the-equals, after-the-equals] pairs. Splitting on the first '='
avoids any possible bugs where there is an = in the value.
3) .flatten flattens this array of arrays into an array that looks like [ key,
value,
key, value, ... ]. We'll need this for step 4.
4) Hash[1, 2, 3, 4] turns the arguments into a hash: { 1 = 2, 3 = 4 }.
We use this to turn the array above into a Hash. The * is used to
turn the array into a series of arguments, because Hash[[1,2,3,4]]
doesn't work, but Hash[*[1,2,3,4]] does. (I often think of * in this
context as the unary unarray operator.)
--
Rein Henrichs
http://puppetlabs.com
There are two types of Linux developers - those who can spell, and
those who can't. There is a constant pitched battle between the two.
(From one of the post-1.1.54 kernel update messages posted to c.o.l.a)
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Re: [Puppet Users] Parsing key/value pairs in ruby
On Aug 12, 2010, at 10:55 AM, Rein Henrichs wrote:
Excerpts from Paul Nasrat's message of Thu Aug 12 06:45:52 -0700 2010:
You might use shellwords to handle the quoting.
require 'shellwords'
l = %q(printer-make-and-model='Brother HL-2060 Foomatic/hpijs-pcl5e
(recommended)' printer-state=3 printer-state-change-time=1266621145
printer-state-reasons=none printer-type=8564756)
Shellwords.shellwords(l)
= [printer-make-and-model=Brother HL-2060 Foomatic/hpijs-pcl5e
(recommended), printer-state=3,
printer-state-change-time=1266621145, printer-state-reasons=none,
printer-type=8564756]
Paul
Paul, shellwords.rb is one of the many great but little-known Ruby
standard library tools. Going a little further, we can turn a string of
shell-quoted key/value pairs separated by an '=' into a hash using:
require 'shellwords'
shellwords = Shellwords.shellwords(your_string)
pairs = shellwords.map{ |s| s.split('=', 2) }.flatten
Hash[*pairs]
This may be a little daunting, so let's break it down:
1) shellwords = Shellwords.shellwords(your_string) turns the string into
an array of tokens, assuming it's been assigned to your_string.
2) pairs.map{|s| s.split('=', 2)} takes each string in turn and splits
it on the first '=', returning a new array containing arrays of
[before-the-equals, after-the-equals] pairs. Splitting on the first '='
avoids any possible bugs where there is an = in the value.
3) .flatten flattens this array of arrays into an array that looks like [
key, value,
key, value, ... ]. We'll need this for step 4.
4) Hash[1, 2, 3, 4] turns the arguments into a hash: { 1 = 2, 3 = 4 }.
We use this to turn the array above into a Hash. The * is used to
turn the array into a series of arguments, because Hash[[1,2,3,4]]
doesn't work, but Hash[*[1,2,3,4]] does. (I often think of * in this
context as the unary unarray operator.)
Thanks both of you for the help. It looks like this will do 40% of the work
for me.
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[Puppet Users] Parsing key/value pairs in ruby
I'm making a provider for cups and I need to parse a string into arbitrary key/value pairs. The string looks like this: printer-make-and-model='Brother HL-2060 Foomatic/hpijs-pcl5e (recommended)' printer-state=3 printer-state-change-time=1266621145 printer-state-reasons=none printer-type=8564756 I know almost no ruby. Any advice for what functions or data structures I want to use? It looks like split might be what I want to use for parsing, but the quoted strings will give me trouble. For the first version, I'm only using 3 of the values. Do I just want to pull out those manually instead of parsing the whole string? -- You received this message because you are subscribed to the Google Groups Puppet Users group. To post to this group, send email to puppet-us...@googlegroups.com. To unsubscribe from this group, send email to puppet-users+unsubscr...@googlegroups.com. For more options, visit this group at http://groups.google.com/group/puppet-users?hl=en.
