Dotanuki
Simple but effective executioner of commands, which will deal correctly with failed commands.
There are two versions of the Dotanuki gem dotanuki which uses posix-spawn and a pure ruby version dotanuki-ruby which uses open4 instead.
Note that if the pure ruby version can load posix-spawn it will use it.
Examples
In the following example, if the mkdir
fails, none of the other commands will be executed.
require "dotanuki"
class Example
include Dotanuki
def test
commands = [
"mkdir /tmp/foo",
"cp /etc/hosts /tmp/foo",
"cp /etc/passwd /tmp/foo"
]
result = execute(commands)
if result.failed?
puts "execution failed: #{result.}"
end
end
end
It can also be used with a guard
block, which will raise an ExecError
if a command fails.
require "dotanuki"
class Example
include Dotanuki
def test
guard do
execute "mkdir /tmp/foo"
execute "cp /etc/hosts /tmp/foo"
execute "cp /etc/passwd /tmp/foo"
end
end
end
If you want to use dotanuki in a class method, you have to use the module method
require "dotanuki"
class Example
def self.test?
Dotanuki.execute("mkdir /tmp/foo").ok?
end
end