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#
# Author:: Lamont Granquist (<lamont@chef.io>)
# Copyright:: Copyright 2013-2016, Chef Software Inc.
# License:: Apache License, Version 2.0
#
# 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"
class Chef
class FileContentManagement
class Tempfile
attr_reader :new_resource
def initialize(new_resource)
@new_resource = new_resource
end
def tempfile
@tempfile ||= tempfile_open
end
private
def tempfile_open
tf = nil
errors = [ ]
tempfile_dirnames.each do |tempfile_dirname|
begin
# preserving the file extension of the target filename should be considered a public API
tf = ::Tempfile.open([tempfile_basename, tempfile_extension], tempfile_dirname)
break
rescue SystemCallError => e
message = "Creating temp file under '#{tempfile_dirname}' failed with: '#{e.message}'"
Chef::Log.trace(message)
errors << message
end
end
raise Chef::Exceptions::FileContentStagingError, errors if tf.nil?
# We always process the tempfile in binmode so that we
# preserve the line endings of the content.
tf.binmode
tf
end
#
# These are important for windows to get permissions right, and may
# be useful for SELinux and other ACL approaches. Please use them
# as the arguments to Tempfile.new() consistently.
#
def tempfile_basename
basename = ::File.basename(@new_resource.path, tempfile_extension)
# the leading "[.]chef-" here should be considered a public API and should not be changed
basename.insert 0, "chef-"
basename.insert 0, "." unless Chef::Platform.windows? # dotfile if we're not on windows
basename
end
# this is similar to File.extname() but greedy about the extension (from the first dot, not the last dot)
def tempfile_extension
# complexity here is due to supporting mangling non-UTF8 strings (e.g. latin-1 filenames with characters that are illegal in UTF-8)
b = File.basename(@new_resource.path)
i = b.index(".")
i.nil? ? "" : b[i..-1]
end
# Returns the possible directories for the tempfile to be created in.
def tempfile_dirnames
# in why-run mode we need to create a Tempfile to compare against, which we will never
# wind up deploying, but our enclosing directory for the destdir may not exist yet, so
# instead we can reliably always create a Tempfile to compare against in Dir::tmpdir
if Chef::Config[:why_run]
[ Dir.tmpdir ]
else
case Chef::Config[:file_staging_uses_destdir]
when :auto
# In auto mode we try the destination directory first and fallback to ENV['TMP'] if
# that doesn't work.
[ ::File.dirname(@new_resource.path), Dir.tmpdir ]
when true
[ ::File.dirname(@new_resource.path) ]
when false
[ Dir.tmpdir ]
else
raise Chef::Exceptions::ConfigurationError, "Unknown setting '#{Chef::Config[:file_staging_uses_destdir]}' for Chef::Config[:file_staging_uses_destdir]. Possible values are :auto, true or false."
end
end
end
end
end
end
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