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authorelijah <elijah@riseup.net>2012-10-11 00:42:46 -0700
committerelijah <elijah@riseup.net>2012-10-11 00:42:46 -0700
commit113d3a59eaa7547433434d155fc1e60aa7c2094c (patch)
treec468f38066f2f7669f84efb2d6b971fac0cf2346 /lib
parent64073733a1213a5e4fe2fef7722996f62ba89c5c (diff)
downloadleap_cli-113d3a59eaa7547433434d155fc1e60aa7c2094c.tar.gz
leap_cli-113d3a59eaa7547433434d155fc1e60aa7c2094c.tar.bz2
code cleanup. better support for nested configs and templates.
Diffstat (limited to 'lib')
-rw-r--r--lib/core_ext/hash.rb22
-rw-r--r--lib/leap_cli.rb7
-rw-r--r--lib/leap_cli/commands/list.rb16
-rw-r--r--lib/leap_cli/commands/pre.rb2
-rw-r--r--lib/leap_cli/config/base.rb149
-rw-r--r--lib/leap_cli/config/manager.rb83
-rw-r--r--lib/leap_cli/config/node.rb19
-rw-r--r--lib/leap_cli/config/object.rb233
-rw-r--r--lib/leap_cli/config/object_list.rb (renamed from lib/leap_cli/config/list.rb)32
-rw-r--r--lib/leap_cli/config/tag.rb19
-rw-r--r--lib/leap_cli/log.rb5
11 files changed, 314 insertions, 273 deletions
diff --git a/lib/core_ext/hash.rb b/lib/core_ext/hash.rb
index a9e5c9e..15f72fc 100644
--- a/lib/core_ext/hash.rb
+++ b/lib/core_ext/hash.rb
@@ -44,7 +44,7 @@ class Hash
##
#
- # convert self into a plain hash, but only include the specified keys
+ # convert self into a hash, but only include the specified keys
#
def pick(*keys)
keys.map(&:to_s).inject({}) do |hsh, key|
@@ -59,16 +59,16 @@ class Hash
# recursive merging (aka deep merge)
# taken from ActiveSupport::CoreExtensions::Hash::DeepMerge
#
- # def deep_merge(other_hash)
- # self.merge(other_hash) do |key, oldval, newval|
- # oldval = oldval.to_hash if oldval.respond_to?(:to_hash)
- # newval = newval.to_hash if newval.respond_to?(:to_hash)
- # oldval.class.to_s == 'Hash' && newval.class.to_s == 'Hash' ? oldval.deep_merge(newval) : newval
- # end
- # end
+ def deep_merge(other_hash)
+ self.merge(other_hash) do |key, oldval, newval|
+ oldval = oldval.to_hash if oldval.respond_to?(:to_hash)
+ newval = newval.to_hash if newval.respond_to?(:to_hash)
+ oldval.class.to_s == 'Hash' && newval.class.to_s == 'Hash' ? oldval.deep_merge(newval) : newval
+ end
+ end
- # def deep_merge!(other_hash)
- # replace(deep_merge(other_hash))
- # end
+ def deep_merge!(other_hash)
+ replace(deep_merge(other_hash))
+ end
end
diff --git a/lib/leap_cli.rb b/lib/leap_cli.rb
index 6fb91a2..5d35c1e 100644
--- a/lib/leap_cli.rb
+++ b/lib/leap_cli.rb
@@ -12,11 +12,10 @@ require 'core_ext/nil'
require 'leap_cli/init'
require 'leap_cli/path'
require 'leap_cli/log'
-require 'leap_cli/config/base'
-require 'leap_cli/config/node'
-require 'leap_cli/config/tag'
+require 'leap_cli/config/object'
+require 'leap_cli/config/object_list'
require 'leap_cli/config/manager'
-require 'leap_cli/config/list'
+
#
# make 1.8 act like ruby 1.9
diff --git a/lib/leap_cli/commands/list.rb b/lib/leap_cli/commands/list.rb
index 166ed2a..0f1c96e 100644
--- a/lib/leap_cli/commands/list.rb
+++ b/lib/leap_cli/commands/list.rb
@@ -1,16 +1,16 @@
module LeapCli
module Commands
- def self.print_config_table(type, config_list)
+ def self.print_config_table(type, object_list)
style = {:border_x => '-', :border_y => ':', :border_i => '-', :width => 60}
if type == :services
t = table do
self.style = style
self.headings = ['SERVICE', 'NODES']
- list = config_list.keys.sort
+ list = object_list.keys.sort
list.each do |name|
- add_row [name, config_list[name].nodes.keys.join(', ')]
+ add_row [name, object_list[name].node_list.keys.join(', ')]
add_separator unless name == list.last
end
end
@@ -20,9 +20,9 @@ module LeapCli
t = table do
self.style = style
self.headings = ['TAG', 'NODES']
- list = config_list.keys.sort
+ list = object_list.keys.sort
list.each do |name|
- add_row [name, config_list[name].nodes.keys.join(', ')]
+ add_row [name, object_list[name].node_list.keys.join(', ')]
add_separator unless name == list.last
end
end
@@ -32,9 +32,11 @@ module LeapCli
t = table do
self.style = style
self.headings = ['NODE', 'SERVICES', 'TAGS']
- list = config_list.keys.sort
+ list = object_list.keys.sort
list.each do |name|
- add_row [name, config_list[name].services.to_a.join(', '), config_list[name].tags.to_a.join(', ')]
+ services = object_list[name]['services'] || []
+ tags = object_list[name]['tags'] || []
+ add_row [name, services.to_a.join(', '), tags.to_a.join(', ')]
add_separator unless name == list.last
end
end
diff --git a/lib/leap_cli/commands/pre.rb b/lib/leap_cli/commands/pre.rb
index ae58fc8..2281bf6 100644
--- a/lib/leap_cli/commands/pre.rb
+++ b/lib/leap_cli/commands/pre.rb
@@ -30,7 +30,7 @@ module LeapCli
if Path.ok?
true
else
- exit_now!("Could not find the root directory. Change current working directory or try --root")
+ fail!("Could not find the root directory. Change current working directory or try --root")
end
end
diff --git a/lib/leap_cli/config/base.rb b/lib/leap_cli/config/base.rb
deleted file mode 100644
index c7f4bc9..0000000
--- a/lib/leap_cli/config/base.rb
+++ /dev/null
@@ -1,149 +0,0 @@
-module LeapCli
- module Config
- #
- # This class represents the configuration for a single node, service, or tag.
- #
- class Base < Hash
-
- def initialize(manager=nil, node=nil)
- @manager = manager
- @node = node || self
- end
-
- ##
- ## FETCHING VALUES
- ##
-
- #
- # lazily eval dynamic values when we encounter them.
- #
- def [](key)
- value = fetch(key, nil)
- if value.is_a? Array
- value
- elsif value.nil?
- nil
- else
- if value =~ /^= (.*)$/
- begin
- value = eval($1)
- self[key] = value
- rescue Exception => exc
- puts "Eval error in '#{name}'"
- puts " string: #{$1}"
- puts " error: #{exc}"
- end
- end
- value
- end
- end
-
- def name
- @node['name']
- end
-
- #
- # make hash addressable like an object (e.g. obj['name'] available as obj.name)
- #
- def method_missing(method, *args, &block)
- method = method.to_s
- if self.has_key?(method)
- self[method]
- elsif @node != self
- @node.send(method) # send call up the tree...
- else
- raise NoMethodError.new(method)
- end
- end
-
- #
- # a deep (recursive) merge with another hash or node.
- #
- def deep_merge!(hsh)
- hsh.each do |key,new_value|
- old_value = self[key]
- if old_value.is_a?(Hash) || new_value.is_a?(Hash)
- # merge hashes
- value = Base.new(@manager, @node)
- old_value.is_a?(Hash) ? value.deep_merge!(old_value) : (value[key] = old_value if old_value.any?)
- new_value.is_a?(Hash) ? value.deep_merge!(new_value) : (value[key] = new_value if new_value.any?)
- elsif old_value.is_a?(Array) || new_value.is_a?(Array)
- # merge arrays
- value = []
- old_value.is_a?(Array) ? value += old_value : value << old_value
- new_value.is_a?(Array) ? value += new_value : value << new_value
- value.compact!
- elsif new_value.nil?
- value = old_value
- elsif old_value.nil?
- value = new_value
- elsif old_value.is_a?(Boolean) && new_value.is_a?(Boolean)
- value = new_value
- elsif old_value.class != new_value.class
- raise 'Type mismatch. Cannot merge %s with %s. Key value is %s, name is %s.' % [old_value.class, new_value.class, key, name]
- else
- value = new_value
- end
- self[key] = value
- end
- self
- end
-
- #def deep_merge!(new_node)
- # new_node.each do |key, value|
- # if value.is_a? self.class
- # value = Base.new(@manager, @node).deep_merge!(value)
- # self[key] = new_node[key]
- # end
- # self
- #end
-
- #
- # like a normal deep_merge, but replace any hash it encounters with a Config::Base
- #
- #def deep_merge(other_hash)
- # p [self['name'], other_hash['name']]
- # self.merge(other_hash) do |key, oldval, newval|
- # oldval = oldval.to_hash if oldval.respond_to?(:to_hash)
- # newval = newval.to_hash if newval.respond_to?(:to_hash)
- # p key
- # p oldval.class
- # p newval.class
- # if oldval.class.to_s == 'Hash' && newval.class.to_s == 'Hash'
- # oldval.deep_merge(newval)
- # elsif newval.class.to_s == 'Hash'
- # p key
- # Base.new(@manager, node).replace(newval)
- # else
- # newval
- # end
- # end
- #end
- #
- #def deep_merge!(other_hash)
- # replace(deep_merge(other_hash))
- #end
-
- private
-
- ##
- ## MACROS
- ## these are methods used when eval'ing a value in the .json configuration
- ##
-
- #
- # inserts the contents of a file
- #
- def file(filename)
- filepath = Path.find_file(name, filename)
- if filepath
- File.read(filepath)
- else
- log0('no such file, "%s"' % filename)
- ""
- end
- end
-
- end # class
- end # module
-end # module \ No newline at end of file
diff --git a/lib/leap_cli/config/manager.rb b/lib/leap_cli/config/manager.rb
index 6a7c1e9..55575cf 100644
--- a/lib/leap_cli/config/manager.rb
+++ b/lib/leap_cli/config/manager.rb
@@ -1,11 +1,14 @@
-require 'oj'
+require 'json/pure'
require 'yaml'
module LeapCli
module Config
+ #
+ # A class to manage all the objects in all the configuration files.
+ #
class Manager
- attr_reader :services, :tags, :nodes
+ attr_reader :services, :tags, :nodes, :provider
##
## IMPORT EXPORT
@@ -15,10 +18,11 @@ module LeapCli
# load .json configuration files
#
def load(dir)
- @services = load_all_json("#{dir}/services/*.json", :tag)
- @tags = load_all_json("#{dir}/tags/*.json", :tag)
- @common = load_all_json("#{dir}/common.json", :tag)['common']
- @nodes = load_all_json("#{dir}/nodes/*.json", :node)
+ @services = load_all_json("#{dir}/services/*.json")
+ @tags = load_all_json("#{dir}/tags/*.json")
+ @common = load_all_json("#{dir}/common.json")['common']
+ @provider = load_all_json("#{dir}/provider.json")['provider']
+ @nodes = load_all_json("#{dir}/nodes/*.json")
@nodes.each do |name, node|
@nodes[name] = apply_inheritance(node)
end
@@ -61,7 +65,7 @@ module LeapCli
filters[0] = filters[0][1..-1]
end
- node_list = Config::List.new
+ node_list = Config::ObjectList.new
filters.each do |filter|
if filter =~ /^\+/
keep_list = nodes_for_name(filter[1..-1])
@@ -73,38 +77,21 @@ module LeapCli
end
end
else
- node_list << nodes_for_name(filter)
+ node_list.merge!(nodes_for_name(filter))
end
end
return node_list
end
- ##
- ## CLASS METHODS
- ##
-
- #def self.manager
- # @manager ||= begin
- # manager = ConfigManager.new
- # manager.load(Path.provider)
- # manager
- # end
- #end
-
- #def self.filter(filters); manager.filter(filters); end
- #def self.nodes; manager.nodes; end
- #def self.services; manager.services; end
- #def self.tags; manager.tags; end
-
private
def load_all_json(pattern, config_type = :class)
- results = Config::List.new
+ results = Config::ObjectList.new
Dir.glob(pattern).each do |filename|
obj = load_json(filename, config_type)
if obj
name = File.basename(filename).sub(/\.json$/,'')
- obj['name'] = name
+ obj['name'] ||= name
results[name] = obj
end
end
@@ -128,15 +115,16 @@ module LeapCli
# parse json, and flatten hash
begin
- hash = Oj.load(buffer.string) || {}
+ #hash = Oj.load(buffer.string) || {}
+ hash = JSON.parse(buffer.string, :object_class => Hash, :array_class => Array) || {}
rescue SyntaxError => exc
log0 'Error in file "%s":' % filename
log0 exc.to_s
return nil
end
- config = config_type == :node ? Node.new(self) : Tag.new(self)
- config.deep_merge!(hash)
- return config
+ object = Config::Object.new(self)
+ object.deep_merge!(hash)
+ return object
end
#
@@ -156,17 +144,14 @@ module LeapCli
# end
#
- # makes this node inherit options from the common, service, and tag json files.
- #
- # - takes a hash
- # - returns a Node object.
+ # makes a node inherit options from appropriate the common, service, and tag json files.
#
def apply_inheritance(node)
- new_hash = Node.new(self)
- #new_node = Node.new(self)
+ new_node = Config::Object.new(self)
+ name = node.name
# inherit from common
- new_hash.deep_merge!(@common)
+ new_node.deep_merge!(@common)
# inherit from services
if node['services']
@@ -175,8 +160,8 @@ module LeapCli
if service.nil?
log0('Error in node "%s": the service "%s" does not exist.' % [node['name'], node_service])
else
- new_hash.deep_merge!(service)
- service.nodes << new_hash
+ new_node.deep_merge!(service)
+ service.node_list.add(name, new_node)
end
end
end
@@ -188,19 +173,15 @@ module LeapCli
if tag.nil?
log0('Error in node "%s": the tag "%s" does not exist.' % [node['name'], node_tag])
else
- new_hash.deep_merge!(tag)
- tag.nodes << new_hash
+ new_node.deep_merge!(tag)
+ tag.node_list.add(name, new_node)
end
end
end
# inherit from node
- new_hash.deep_merge!(node)
-
- # typecast full hash tree to type Node
- #new_node.clone_from_plain_hash!(new_hash)
-
- return new_hash
+ new_node.deep_merge!(node)
+ return new_node
end
#
@@ -208,11 +189,11 @@ module LeapCli
#
def nodes_for_name(name)
if node = self.nodes[name]
- Config::List.new(node)
+ Config::ObjectList.new(node)
elsif service = self.services[name]
- service.nodes
+ service.node_list
elsif tag = self.tags[name]
- tag.nodes
+ tag.node_list
end
end
diff --git a/lib/leap_cli/config/node.rb b/lib/leap_cli/config/node.rb
deleted file mode 100644
index 5389b44..0000000
--- a/lib/leap_cli/config/node.rb
+++ /dev/null
@@ -1,19 +0,0 @@
-module LeapCli
- module Config
- class Node < Base
-
- def nodes
- @manager.nodes
- end
-
- def services
- self['services'] || []
- end
-
- def tags
- self['tags'] || []
- end
-
- end
- end
-end
diff --git a/lib/leap_cli/config/object.rb b/lib/leap_cli/config/object.rb
new file mode 100644
index 0000000..2ef7fe8
--- /dev/null
+++ b/lib/leap_cli/config/object.rb
@@ -0,0 +1,233 @@
+require 'erb'
+require 'json/pure' # pure ruby implementation is required for our sorted trick to work.
+
+module LeapCli
+ module Config
+ #
+ # This class represents the configuration for a single node, service, or tag.
+ # Also, all the nested hashes are also of this type.
+ #
+ # It is called 'object' because it corresponds to an Object in JSON.
+ #
+ class Object < Hash
+
+ attr_reader :node
+ attr_reader :manager
+ attr_reader :node_list
+ alias :global :manager
+
+ def initialize(manager=nil, node=nil)
+ # keep a global pointer around to the config manager. used a lot in the eval strings and templates
+ # (which are evaluated in the context of Config::Object)
+ @manager = manager
+
+ # an object that is a node as @node equal to self, otherwise all the child objects point back to the top level node.
+ @node = node || self
+
+ # this is only used by Config::Objects that correspond to services or tags.
+ @node_list = Config::ObjectList.new
+ end
+
+ ##
+ ## FETCHING VALUES
+ ##
+
+ #
+ # like a normal hash [], except:
+ # * lazily eval dynamic values when we encounter them.
+ # * support for nested hashes (e.g. ['a.b'] is the same as ['a']['b'])
+ #
+ def [](key)
+ get(key)
+ end
+
+ #
+ # make hash addressable like an object (e.g. obj['name'] available as obj.name)
+ #
+ def method_missing(method, *args, &block)
+ get!(method)
+ end
+
+ def get(key)
+ begin
+ get!(key)
+ rescue NoMethodError
+ nil
+ end
+ end
+
+ def get!(key)
+ key = key.to_s
+ if key =~ /\./
+ keys = key.split('.')
+ value = get!(keys.first)
+ if value.is_a? Config::Object
+ value.get!(keys[1..-1])
+ else
+ value
+ end
+ elsif self.has_key?(key)
+ evaluate_value(key)
+ elsif @node != self
+ @node.get!(key)
+ else
+ raise NoMethodError.new(key, "No method '#{key}' for #{self.class}")
+ end
+ end
+
+ ##
+ ## COPYING
+ ##
+
+ #
+ # Make a copy of ourselves, except only including the specified keys.
+ #
+ # Also, the result is flattened to a single hash, so a key of 'a.b' becomes 'a_b'
+ #
+ def pick(*keys)
+ keys.map(&:to_s).inject(Config::Object.new(@manager,@node)) do |hsh, key|
+ value = self.get(key)
+ if value
+ hsh[key.gsub('.','_')] = value
+ end
+ hsh
+ end
+ end
+
+ #
+ # a deep (recursive) merge with another Config::Object.
+ #
+ def deep_merge!(object)
+ object.each do |key,new_value|
+ old_value = self[key]
+ if old_value.is_a?(Hash) || new_value.is_a?(Hash)
+ # merge hashes
+ value = Config::Object.new(@manager, @node)
+ old_value.is_a?(Hash) ? value.deep_merge!(old_value) : (value[key] = old_value if old_value.any?)
+ new_value.is_a?(Hash) ? value.deep_merge!(new_value) : (value[key] = new_value if new_value.any?)
+ elsif old_value.is_a?(Array) || new_value.is_a?(Array)
+ # merge arrays
+ value = []
+ old_value.is_a?(Array) ? value += old_value : value << old_value
+ new_value.is_a?(Array) ? value += new_value : value << new_value
+ value.compact!
+ elsif new_value.nil?
+ value = old_value
+ elsif old_value.nil?
+ value = new_value
+ elsif old_value.is_a?(Boolean) && new_value.is_a?(Boolean)
+ value = new_value
+ elsif old_value.class != new_value.class
+ raise 'Type mismatch. Cannot merge %s with %s. Key value is %s, name is %s.' % [old_value.class, new_value.class, key, name]
+ else
+ value = new_value
+ end
+ self[key] = value
+ end
+ self
+ end
+
+ private
+
+ #
+ # fetches the value for the key, evaluating the value as ruby if it begins with '='
+ #
+ def evaluate_value(key)
+ value = fetch(key, nil)
+ if value.is_a? Array
+ value
+ elsif value.nil?
+ nil
+ else
+ if value =~ /^= (.*)$/
+ begin
+ value = eval($1, self.send(:binding))
+ self[key] = value
+ rescue SystemStackError => exc
+ puts "STACK OVERFLOW, BAILING OUT"
+ puts "There must be an eval loop of death (variables with circular dependencies). This is the offending string:"
+ puts
+ puts " #{$1}"
+ puts
+ raise SystemExit.new()
+ rescue StandardError => exc
+ puts "Eval error in '#{@node.name}'"
+ puts " string: #{$1}"
+ puts " error: #{exc.name}"
+ end
+ end
+ value
+ end
+ end
+
+ ##
+ ## MACROS
+ ## these are methods used when eval'ing a value in the .json configuration
+ ##
+
+ #
+ # the list of all the nodes
+ #
+ def nodes
+ global.nodes
+ end
+
+ #
+ # inserts the contents of a file
+ #
+ def file(filename)
+ filepath = Path.find_file(@node.name, filename)
+ if filepath
+ if filepath =~ /\.erb$/
+ ERB.new(File.read(filepath), nil, '%<>').result(binding)
+ else
+ File.read(filepath)
+ end
+ else
+ log0('no such file, "%s"' % filename)
+ ""
+ end
+ end
+
+ #
+ # Output json from ruby objects in such a manner that all the hashes and arrays are output in alphanumeric sorted order.
+ # This is required so that our generated configs don't throw puppet or git for a tizzy fit.
+ #
+ # Beware: some hacky stuff ahead.
+ #
+ # This relies on the pure ruby implementation of JSON.generate (i.e. require 'json/pure')
+ # see https://github.com/flori/json/blob/master/lib/json/pure/generator.rb
+ #
+ # The Oj way that we are not using: Oj.dump(obj, :mode => :compat, :indent => 2)
+ #
+ def generate_json(obj)
+
+ # modify hash and array
+ Hash.class_eval do
+ alias_method :each_without_sort, :each
+ def each(&block)
+ keys.sort {|a,b| a.to_s <=> b.to_s }.each do |key|
+ yield key, self[key]
+ end
+ end
+ end
+ Array.class_eval do
+ alias_method :each_without_sort, :each
+ def each(&block)
+ sort {|a,b| a.to_s <=> b.to_s }.each_without_sort &block
+ end
+ end
+
+ # generate json
+ return_value = JSON.pretty_generate(obj)
+
+ # restore hash and array
+ Hash.class_eval {alias_method :each, :each_without_sort}
+ Array.class_eval {alias_method :each, :each_without_sort}
+
+ return return_value
+ end
+
+ end # class
+ end # module
+end # module \ No newline at end of file
diff --git a/lib/leap_cli/config/list.rb b/lib/leap_cli/config/object_list.rb
index 28ef499..bcc000d 100644
--- a/lib/leap_cli/config/list.rb
+++ b/lib/leap_cli/config/object_list.rb
@@ -1,10 +1,13 @@
module LeapCli
module Config
- class List < Hash
+ #
+ # A list of Config::Object instances (internally stored as a hash)
+ #
+ class ObjectList < Hash
def initialize(config=nil)
if config
- self << config
+ self.add(config['name'], config)
end
end
@@ -19,7 +22,7 @@ module LeapCli
#
def [](key)
if key.is_a? Hash
- results = List.new
+ results = Config::ObjectList.new
field, match_value = key.to_a.first
field = field.is_a?(Symbol) ? field.to_s : field
match_value = match_value.is_a?(Symbol) ? match_value.to_s : match_value
@@ -43,14 +46,19 @@ module LeapCli
end
end
- def <<(config)
- if config.is_a? Config::List
- self.deep_merge!(config)
- elsif config['name']
- self[config['name']] = config
- else
- raise ArgumentError.new('argument must be a Config::Base or a Config::List')
- end
+
+ # def <<(object)
+ # if object.is_a? Config::ObjectList
+ # self.merge!(object)
+ # elsif object['name']
+ # self[object['name']] = object
+ # else
+ # raise ArgumentError.new('argument must be a Config::Object or a Config::ObjectList')
+ # end
+ # end
+
+ def add(name, object)
+ self[name] = object
end
#
@@ -71,7 +79,7 @@ module LeapCli
field = field.to_s
result = []
keys.sort.each do |name|
- result << self[name][field]
+ result << self[name].get(field)
end
result
end
diff --git a/lib/leap_cli/config/tag.rb b/lib/leap_cli/config/tag.rb
deleted file mode 100644
index 25c7246..0000000
--- a/lib/leap_cli/config/tag.rb
+++ /dev/null
@@ -1,19 +0,0 @@
-module LeapCli
- module Config
- class Tag < Base
-
- def nodes
- @nodes ||= Config::List.new
- end
-
- def services
- @manager.services
- end
-
- def tags
- @manager.tags
- end
-
- end
- end
-end
diff --git a/lib/leap_cli/log.rb b/lib/leap_cli/log.rb
index f51ca1e..fe8e5ac 100644
--- a/lib/leap_cli/log.rb
+++ b/lib/leap_cli/log.rb
@@ -42,3 +42,8 @@ def help!(message=nil)
ENV['GLI_DEBUG'] = "false"
help_now!(message)
end
+
+def fail!(message=nil)
+ ENV['GLI_DEBUG'] = "false"
+ exit_now!(message)
+end \ No newline at end of file