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|
require "pathname"
require "librarian/config/file_source"
require "librarian/config/hash_source"
module Librarian
module Config
class Database
class << self
def library
name.split("::").first.downcase
end
end
attr_accessor :adapter_name
private :adapter_name=
attr_accessor :root, :assigned_specfile_name
private :root=, :assigned_specfile_name=
attr_accessor :underlying_env, :underlying_pwd, :underlying_home
private :underlying_env=, :underlying_pwd=, :underlying_home=
def initialize(adapter_name, options = { })
self.adapter_name = adapter_name or raise ArgumentError, "must provide adapter_name"
options[:project_path] || options[:pwd] or raise ArgumentError, "must provide project_path or pwd"
self.root = options[:project_path] && Pathname(options[:project_path])
self.assigned_specfile_name = options[:specfile_name]
self.underlying_env = options[:env] or raise ArgumentError, "must provide env"
self.underlying_pwd = options[:pwd] && Pathname(options[:pwd])
self.underlying_home = options[:home] && Pathname(options[:home])
end
def global
memo(__method__) { new_file_source(global_config_path) }
end
def env
memo(__method__) { HashSource.new(adapter_name, :name => "environment", :raw => env_source_data) }
end
def local
memo(__method__) { new_file_source(local_config_path) }
end
def [](key, scope = nil)
case scope
when "local", :local then local[key]
when "env", :env then env[key]
when "global", :global then global[key]
when nil then local[key] || env[key] || global[key]
else raise Error, "bad scope"
end
end
def []=(key, scope, value)
case scope
when "local", :local then local[key] = value
when "global", :global then global[key] = value
else raise Error, "bad scope"
end
end
def keys
[local, env, global].inject([]){|a, e| a.concat(e.keys) ; a}.sort.uniq
end
def project_path
root || specfile_path.dirname
end
def specfile_path
if root
root + (assigned_specfile_name || default_specfile_name)
else
env_specfile_path || default_specfile_path
end
end
def specfile_name
specfile_path.basename.to_s
end
def lockfile_path
project_path + lockfile_name
end
def lockfile_name
"#{specfile_name}.lock"
end
private
def new_file_source(config_path)
return unless config_path
FileSource.new(adapter_name,
:config_path => config_path,
:forbidden_keys => [config_key, specfile_key]
)
end
def global_config_path
env_global_config_path || default_global_config_path
end
def env_global_config_path
memo(__method__) { env[config_key] }
end
def default_global_config_path
underlying_home && underlying_home + config_name
end
def local_config_path
root_local_config_path || env_local_config_path || default_local_config_path
end
def root_local_config_path
root && root + config_name
end
def env_specfile_path
memo(__method__) do
path = env[specfile_key]
path && Pathname(path)
end
end
def default_specfile_path
default_project_root_path + (assigned_specfile_name || default_specfile_name)
end
def env_local_config_path
return unless env_specfile_path
env_specfile_path.dirname + config_name
end
def default_local_config_path
default_project_root_path + config_name
end
def default_project_root_path
if root
root
else
path = underlying_pwd
path = path.dirname until project_root_path?(path) || path.dirname == path
project_root_path?(path) ? path : underlying_pwd
end
end
def project_root_path?(path)
File.file?(path + default_specfile_name)
end
def config_key
"config"
end
def specfile_key
"#{adapter_name}file"
end
def default_specfile_name
"#{adapter_name.capitalize}file"
end
def library
self.class.library
end
def config_name_prefix
".#{library}"
end
def config_name
File.join(*[config_name_prefix, adapter_name, "config"])
end
def raw_key_prefix
"#{library.upcase}_#{adapter_name.upcase}_"
end
def env_source_data
prefix = raw_key_prefix
data = underlying_env.dup
data.reject!{|k, _| !k.start_with?(prefix) || k.size <= prefix.size}
data
end
def memo(key)
key = "@#{key}"
instance_variable_set(key, yield) unless instance_variable_defined?(key)
instance_variable_get(key)
end
end
end
end
|
