A simple method to print out the methods for an object at run time in a nicely formatted and colorized way. Really useful when using irb

Place in your .irbrc for easy usage, example here:
http://dotfiles.org/~sd/.irbrc

usage:
pm object
pm object, :more - shows all methods including base Object methods
pm object, :more, /to/ - shows all methods filtered by regexp

Coded by sebastian delmont

    ANSI_BOLD       = "\033[1m"
    ANSI_RESET      = "\033[0m"
    ANSI_LGRAY    = "\033[0;37m"
    ANSI_GRAY     = "\033[1;30m"

    def pm(obj, *options) # Print methods
      methods = obj.methods
      methods -= Object.methods unless options.include? :more
      filter = options.select {|opt| opt.kind_of? Regexp}.first
      methods = methods.select {|name| name =~ filter} if filter

      data = methods.sort.collect do |name|
        method = obj.method(name)
        if method.arity == 0
          args = "()"
        elsif method.arity > 0
          n = method.arity
          args = "(#{(1..n).collect {|i| "arg#{i}"}.join(", ")})"
        elsif method.arity < 0
          n = -method.arity
          args = "(#{(1..n).collect {|i| "arg#{i}"}.join(", ")}, ...)"
        end
        klass = $1 if method.inspect =~ /Method: (.*?)#/
        [name, args, klass]
      end
      max_name = data.collect {|item| item[0].size}.max
      max_args = data.collect {|item| item[1].size}.max
      data.each do |item| 
        print " #{ANSI_BOLD}#{item[0].rjust(max_name)}#{ANSI_RESET}"
        print "#{ANSI_GRAY}#{item[1].ljust(max_args)}#{ANSI_RESET}"
        print "   #{ANSI_LGRAY}#{item[2]}#{ANSI_RESET}\n"
      end
      data.size
    end

This is a subversion pre-commit hook that prevents a Ruby on Rails migration being committed that has the same version as an existing migration. To install you place this in a file called pre-commit in the hooks directory of your subversion repository. You can read about hooks here: http://svnbook.red-bean.com/en/1.0/ch05s02.html

#!/usr/bin/env ruby

repo_path = ARGV[0]
transaction = ARGV[1]
svnlook = '/usr/bin/svnlook'

commit_dirs_changed = `#{svnlook} dirs-changed #{repo_path} -t #{transaction}`
commit_changed = `#{svnlook} changed #{repo_path} -t #{transaction}`
#commit_author = `#{svnlook} author #{repo_path} -t #{transaction}`.chop
commit_log = `#{svnlook} log #{repo_path} -t #{transaction}`
#commit_diff = `#{svnlook} diff #{repo_path} -t #{transaction}`
#commit_date = `#{svnlook} date #{repo_path} -t #{transaction}`

# ******* Migration check ********
# if this is a migration then check that there is not already a migration with the same version number in the repository
files = commit_changed.split(/\n/)
current_migrations = nil
for file in files
  if(file =~ /A\s*(.*?\/migrate\/)(\d+)(.*)/)
    migration_path = $1
    migration_version = $2
    
    if(current_migrations == nil)
      current_migrations = {}
      migration_files = `#{svnlook} tree #{repo_path} #{migration_path}`
      for migration in migration_files
        current_migrations[$1] = true if(migration =~ /\s*(\d+)_(.*)/)
      end
    end
    
    if(current_migrations[migration_version])
     STDERR.puts("The is a pre-existing migration with version #{migration_version} in #{migration_path}")
     exit(1)
    end
  end
end