Quick Ruby on Rails SQL Shell Tool 25
This is a simple Ruby script that I put together to launch a MySQL shell for a rails application. It looks within the current directory and parent directories for a database.yml configuration file to read.
#!/usr/bin/env ruby
require 'yaml'
require 'optparse'
config = nil
path = "."
while (File.exists?(path) and (path.length < 255) and !config)
if (File.exists?("#{path}/config/database.yml"))
File.open("#{path}/config/database.yml") do |f|
config = YAML.load(f)
end
else
path = "../#{path}"
end
end
unless (config)
puts "Could not find database.yml"
exit(-1)
end
command = "mysql"
verbose = false
opts = OptionParser.new
opts.on("-v", "--verbose") { verbose = true }
opts.on("-d", "--dump") { command = "mysqldump" }
args = opts.parse(*ARGV)
environ = (args[0] or ENV['RAILS_ENV'] or 'development')
if (config and config[environ])
config = config[environ]
puts config.inspect if (verbose)
exec(command,
"--user=#{config['username']}",
"--password=#{config['password']}",
"--host=#{config['host']}",
"--port=#{config['port'] or 3306}",
config['database']
)
elsif (config)
print "Could not find environment #{environ} in configuration file\n"
exit(-2)
else
print "Could not find or read Rails configuration file\n"
exit(-1)
endFor example, to save a database backup:
% cd svn/myapp/db % rsql --dump > dev.sql
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