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definitions.rb
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definitions.rb
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require 'grit'
require 'veewee/definition'
require 'veewee/templates'
require 'veewee/template'
module Veewee
class Definitions
attr_accessor :env
def initialize(env)
@env=env
return self
end
def [](name)
begin
definition=Veewee::Definition.load(name,env)
return definition
rescue Veewee::DefinitionNotExist
return nil
end
end
# Fetch all definitions
def each(&block)
definitions=Hash.new
env.logger.debug("[Definition] Searching #{env.definition_dir} for definitions:")
subdirs=Dir.glob("#{env.definition_dir}/*")
subdirs.each do |sub|
name=File.basename(sub)
env.logger.debug("[Definition] possible definition '#{name}' found")
begin
definitions[name]=Veewee::Definition.load(name,env)
rescue Veewee::DefinitionError => ex
env.logger.debug("[Definition] failed to load definition from directory '#{name}' #{ex}")
end
end
if definitions.length==0
env.logger.debug("[Definition] no definitions found")
end
definitions.each(&block)
end
# This function 'defines'/'clones'/'instantiates a template:
# It copies from a template dir with template_name
# to a new definition dir with definition_name
#
# Options are : :force => true to overwrite an existing definition
#
# Returns definition object
def define(definition_name,template_name,options = {})
# Default is not to overwrite
options = {'force' => false}.merge(options)
env.logger.debug("Forceflag : #{options['force']}")
git_template=false
# Check if the template is a git repo
if template_name.start_with?("git://")
git_template=true
end
# Check if template exists
template=env.templates[template_name]
if template.nil? and ! git_template
env.logger.fatal("Template '#{template_name}' does not exist")
raise Veewee::TemplateError, "Template '#{template_name}' does not exist"
else
env.logger.debug("Template '#{template_name}' exists")
end
create_definition_dir_if_needed
# Check if definition does not exist
definition=env.definitions[definition_name]
unless definition.nil?
env.logger.debug("Definition '#{definition_name}' exists")
if options['force']==true
self.undefine(definition_name,options)
else
raise Veewee::DefinitionError,"Definition #{definition_name} already exists and no force option was given"
end
end
env.logger.info("Creating definition #{definition_name} in directory '#{env.definition_dir}' ")
dst_dir="#{File.join(env.definition_dir,definition_name)}"
FileUtils.mkdir(dst_dir)
env.logger.debug("Definition Directory '#{File.join(env.definition_dir,definition_name)}' succesfuly created")
# Start copying/cloning the directory of the template to the definition directory
if (git_template)
begin
env.logger.info("Starting git clone #{template_name} #{dst_dir}")
g = Grit::Git.new(dst_dir)
g.clone({ :timeout => false }, template_name, dst_dir)
rescue Exception => ex
err = "git clone #{template_name} #{dst_dir} failed: #{ex}"
env.logger.fatal(err)
raise Veewee::DefinitionError, err
end
else
begin
env.logger.debug("Starting copy '#{template.path}' to '#{dst_dir}'")
FileUtils.cp_r(template.path+"/.",dst_dir)
env.logger.debug("Copy '#{template.path}' to '#{dst_dir}' succesfull")
rescue Exception => ex
env.logger.fatal("Copy '#{template.path}' to #{dst_dir}' failed: #{ex}")
raise Veewee::Error , "Copy '#{template.path}' to #{dst_dir}' failed: #{ex}"
end
end
definition=env.definitions[definition_name]
return definition
end
# This function undefines/removes the definition by removing the directoy with definition_name
# under env.definition_dir
def undefine(definition_name,options = {})
definition=env.definitions[definition_name]
unless definition.nil?
#TODO: Needs to be more defensive!!
env.logger.debug("[Undefine] About to remove '#{definition.path} for '#{definition_name}'")
begin
if File.exists?(File.join(definition.path,"definition.rb"))
FileUtils.rm_rf(definition.path)
else
env.logger.fatal("Aborting delete: The directory definition.path does not contain a definition.rb file")
raise Veewee::DefinitionError,"Aborting delete: The directory definition.path does not contain a definition.rb file"
end
rescue Exception => ex
env.logger.fatal("Removing '#{definition.path} for '#{definition_name}' failed: #{ex}")
raise Veewee::Error, "Removing '#{definition.path }for '#{definition_name}' failed: #{ex}"
end
env.logger.debug("Removing '#{definition.path} for '#{definition_name}' succesful")
else
raise Veewee::DefinitionError,"Definition '#{definition_name}' does not exist"
end
end
def create_definition_dir_if_needed
# Check if definition_dir already exists
unless File.exists?(env.definition_dir)
env.logger.debug("Creating definition base directory '#{env.definition_dir}' ")
FileUtils.mkdir(env.definition_dir)
env.logger.debug("Definition base directory '#{env.definition_dir}' succesfuly created")
end
if File.writable?(env.definition_dir)
env.logger.debug("DefinitionDir '#{env.definition_dir}' is writable")
if File.exists?("#{env.definition_dir}")
env.logger.debug("DefinitionDir '#{env.definition_dir}' already exists")
else
env.logger.debug("DefinitionDir '#{env.definition_dir}' does not exist, creating it")
FileUtils.mkdir(definition_dir)
env.logger.debug("DefinitionDir '#{env.definition_dir}' succesfuly created")
end
else
env.logger.fatal("DefinitionDir '#{definition_dir}' is not writable")
raise Veewee::Error, "DefinitionDir '#{definition_dir}' is not writable"
end
end
end
end