lib/crowbar/client/util/editor.rb
#
# Copyright 2015, SUSE Linux GmbH
#
# Licensed under the Apache License, Version 2.0 (the "License");
# you may not use this file except in compliance with the License.
# You may obtain a copy of the License at
#
# http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS,
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
# See the License for the specific language governing permissions and
# limitations under the License.
#
require "tempfile"
require "json"
module Crowbar
module Client
module Util
#
# Launch an editor and return the edited content
#
class Editor
attr_accessor :content
attr_accessor :options
def initialize(options = {})
self.options = options
end
def result
case options.fetch(:format, :json)
when :json
begin
JSON.load content
rescue JSON::ParserError
raise InvalidJsonError,
"Failed to parse the JSON"
end
else
raise InvalidFormatError,
"This format is not supported by the editor"
end
end
def edit!
file.write formatted
file.rewind
original_mtime = File.mtime file.path
unless start
raise EditorStartupError,
"Failed to start a default editor"
end
updated_mtime = File.mtime file.path
unless original_mtime < updated_mtime
raise EditorAbortError,
"Closed editor without saving"
end
self.content = file.read
true
ensure
file.close
file.unlink
end
protected
def file
@file ||= Tempfile.new(
options.fetch(
:prefix,
"editor"
)
)
end
def formatted
case options.fetch(:format, :json)
when :json
JSON.pretty_generate(
options.fetch(
:content,
{}
)
)
else
raise InvalidFormatError,
"This format is not supported by the editor"
end
end
def program
ENV["EDITOR"] || "vi"
end
def start
system(program, file.path) && file.open
end
end
end
end
end