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#
# All configurations files can be isolated into separate environments.
#
# Each config json in each environment inherits from the default environment,
# which in term inherits from the "_base_" environment:
#
# _base_ -- base provider in leap_platform
# '- default -- environment in provider dir when no env is set
# '- production -- example environment
#
module LeapCli; module Config
class Environment
# the String name of the environment
attr_accessor :name
# the shared Manager object
attr_accessor :manager
# hashes of {name => Config::Object}
attr_accessor :services, :tags, :partials
# a Config::Provider
attr_accessor :provider
# a Config::Object
attr_accessor :common
# shared, non-inheritable
def nodes; @@nodes; end
def secrets; @@secrets; end
def cloud; @@cloud; end
def initialize(manager, name, search_dir, parent, options={})
@@nodes ||= nil
@@secrets ||= nil
@@cloud ||= nil
@manager = manager
@name = name
load_provider_files(search_dir, options)
if parent
@services.inherit_from! parent.services, self
@tags.inherit_from! parent.tags , self
@partials.inherit_from! parent.partials, self
@common.inherit_from! parent.common
@provider.inherit_from! parent.provider
end
if @provider
@provider.set_env(name)
@provider.validate!
end
end
def load_provider_files(search_dir, options)
#
# load empty environment if search_dir doesn't exist
#
if search_dir.nil? || !Dir.exist?(search_dir)
@services = Config::ObjectList.new
@tags = Config::ObjectList.new
@partials = Config::ObjectList.new
@provider = Config::Provider.new
@common = Config::Object.new
@cloud = Config::Cloud.new
return
end
#
# inheritable
#
if options[:scope]
scope = options[:scope]
@services = load_all_json(Path.named_path([:service_env_config, '*', scope], search_dir), Config::Tag, options)
@tags = load_all_json(Path.named_path([:tag_env_config, '*', scope], search_dir), Config::Tag, options)
@partials = load_all_json(Path.named_path([:service_env_config, '_*', scope], search_dir), Config::Tag, options)
@provider = load_json( Path.named_path([:provider_env_config, scope], search_dir), Config::Provider, options)
@common = load_json( Path.named_path([:common_env_config, scope], search_dir), Config::Object, options)
else
@services = load_all_json(Path.named_path([:service_config, '*'], search_dir), Config::Tag, options)
@tags = load_all_json(Path.named_path([:tag_config, '*'], search_dir), Config::Tag, options)
@partials = load_all_json(Path.named_path([:service_config, '_*'], search_dir), Config::Tag, options)
@provider = load_json( Path.named_path(:provider_config, search_dir), Config::Provider, options)
@common = load_json( Path.named_path(:common_config, search_dir), Config::Object, options)
end
# remove 'name' from partials, since partials get merged with nodes
@partials.values.each {|partial| partial.delete('name'); }
#
# shared
#
# shared configs are also non-inheritable
# load the first ones we find, and only those.
#
if @@nodes.nil? || @@nodes.empty?
@@nodes = load_all_json(Path.named_path([:node_config, '*'], search_dir), Config::Node, options)
end
if @@secrets.nil? || @@secrets.empty?
@@secrets = load_json(Path.named_path(:secrets_config, search_dir), Config::Secrets, options)
end
if @@cloud.nil? || @@cloud.empty?
@@cloud = load_json(Path.named_path(:cloud_config, search_dir), Config::Cloud)
end
end
#
# Loads a json template file as a Hash (used only when creating a new node .json
# file for the first time).
#
def template(template)
path = Path.named_path([:template_config, template], Path.provider_base)
if File.exist?(path)
return load_json(path, Config::Object)
else
return nil
end
end
#
# Alters the node's json config file. As a side effect, all comments get
# moved to the top of the file.
#
# NOTE: This does a shallow merge! In other words, a call like this...
#
# update_node_json(node, {"webapp" => {"domain" => "example.org"})
#
# ...is probably not what you want, because it will entirely remove all
# existing entries under "webapp".
#
def update_node_json(node, new_values, options=nil)
node_json_path = Path.named_path([:node_config, node.name])
comments = read_comments(node_json_path)
old_data = load_json(node_json_path, Config::Node)
options && options[:remove] && options[:remove].each do |key|
old_data.delete(key)
end
new_data = old_data.merge(new_values)
new_contents = [comments, JSON.sorted_generate(new_data), "\n"].join
Util::write_file! node_json_path, new_contents
end
private
def load_all_json(pattern, object_class, options={})
results = Config::ObjectList.new
Dir.glob(pattern).each do |filename|
next if options[:no_dots] && File.basename(filename) !~ /^[^\.]*\.json$/
obj = load_json(filename, object_class)
if obj
name = File.basename(filename).force_encoding('utf-8').sub(/^([^\.]+).*\.json$/,'\1')
obj['name'] ||= name
if options[:env]
obj.environment = options[:env]
end
results[name] = obj
end
end
results
end
def read_comments(filename)
buffer = StringIO.new
File.open(filename, "rb", :encoding => 'UTF-8') do |f|
while (line = f.gets)
next unless line =~ /^\s*\/\//
buffer << line
end
end
return buffer.string.force_encoding('utf-8')
end
def load_json(filename, object_class, options={})
if !File.exist?(filename)
return object_class.new(self)
end
Util::log :loading, filename, 3
#
# Read a JSON file, strip out comments.
#
# UTF8 is the default encoding for JSON, but others are allowed:
# https://www.ietf.org/rfc/rfc4627.txt
#
buffer = StringIO.new
File.open(filename, "rb", :encoding => 'UTF-8') do |f|
while (line = f.gets)
next if line =~ /^\s*\/\//
buffer << line
end
end
#
# force UTF-8
#
if $ruby_version >= [1,9]
string = buffer.string.force_encoding('utf-8')
else
string = Iconv.conv("UTF-8//IGNORE", "UTF-8", buffer.string)
end
# parse json
begin
hash = JSON.parse(string, :object_class => Hash, :array_class => Array) || {}
rescue SyntaxError, JSON::ParserError => exc
Util::log 0, :error, 'in file "%s":' % filename
Util::log 0, exc.to_s, :indent => 1
return nil
end
object = object_class.new(self)
object.deep_merge!(hash)
return object
end
end # end Environment
end; end
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