Permalink
74 lines (59 sloc) 1.38 KB
module SSHKit
class CommandMap
class CommandHash
def initialize(defaults = {})
@storage = {}
@defaults = defaults
end
def [](key)
@storage[normalize_key(key)] ||= @defaults[key]
end
def []=(key, value)
@storage[normalize_key(key)] = value
end
private
def normalize_key(key)
key.to_sym
end
end
class PrefixProvider
def initialize
@storage = CommandHash.new
end
def [](command)
@storage[command] ||= []
end
end
TO_VALUE = ->(obj) { obj.respond_to?(:call) ? obj.call : obj }
def initialize(value = nil)
@map = CommandHash.new(value || defaults)
end
def [](command)
if prefix[command].any?
prefixes = prefix[command].map(&TO_VALUE)
prefixes = prefixes.join(" ")
"#{prefixes} #{command}"
else
TO_VALUE.(@map[command])
end
end
def prefix
@prefix ||= PrefixProvider.new
end
def []=(command, new_command)
@map[command] = new_command
end
def clear
@map = CommandHash.new(defaults)
end
def defaults
Hash.new do |hash, command|
if %w{if test time exec}.include? command.to_s
hash[command] = command.to_s
else
hash[command] = "/usr/bin/env #{command}"
end
end
end
end
end