diff options
Diffstat (limited to 'lib/chef/provider/file.rb')
-rw-r--r-- | lib/chef/provider/file.rb | 117 |
1 files changed, 84 insertions, 33 deletions
diff --git a/lib/chef/provider/file.rb b/lib/chef/provider/file.rb index 031d0fb005..256248f240 100644 --- a/lib/chef/provider/file.rb +++ b/lib/chef/provider/file.rb @@ -56,6 +56,10 @@ class Chef attr_reader :deployment_strategy + attr_accessor :needs_creating + attr_accessor :needs_unlinking + attr_accessor :managing_symlink + def initialize(new_resource, run_context) @content_class ||= Chef::Provider::File::Content if new_resource.respond_to?(:atomic_update) @@ -69,22 +73,47 @@ class Chef end def load_current_resource + # true if there is a symlink and we need to manage what it points at + @managing_symlink = file_class.symlink?(new_resource.path) && ( new_resource.manage_symlink_source || new_resource.manage_symlink_source.nil? ) + + # true if there is a non-file thing in the way that we need to unlink first + @needs_unlinking = + if ::File.exist?(new_resource.path) + if managing_symlink? + !symlink_to_real_file?(new_resource.path) + else + !real_file?(new_resource.path) + end + else + false + end + + # true if we are going to be creating a new file + @needs_creating = !::File.exist?(new_resource.path) || needs_unlinking? + # Let children resources override constructing the @current_resource - @current_resource ||= Chef::Resource::File.new(@new_resource.name) - @current_resource.path(@new_resource.path) - if ::File.exists?(@current_resource.path) && ::File.file?(::File.realpath(@current_resource.path)) + @current_resource ||= Chef::Resource::File.new(new_resource.name) + current_resource.path(new_resource.path) + + if !needs_creating? + # we are updating an existing file if managing_content? - Chef::Log.debug("#{@new_resource} checksumming file at #{@new_resource.path}.") - @current_resource.checksum(checksum(@current_resource.path)) + Chef::Log.debug("#{new_resource} checksumming file at #{new_resource.path}.") + current_resource.checksum(checksum(current_resource.path)) + else + # if the file does not exist or is not a file, then the checksum is invalid/pointless + current_resource.checksum(nil) end - load_resource_attributes_from_file(@current_resource) + load_resource_attributes_from_file(current_resource) end - @current_resource + + current_resource end def define_resource_requirements # deep inside FAC we have to assert requirements, so call FACs hook to set that up access_controls.define_resource_requirements + # Make sure the parent directory exists, otherwise fail. For why-run assume it would have been created. requirements.assert(:create, :create_if_missing, :touch) do |a| parent_directory = ::File.dirname(@new_resource.path) @@ -94,7 +123,7 @@ class Chef end # Make sure the file is deletable if it exists, otherwise fail. - if ::File.exists?(@new_resource.path) + if ::File.exist?(@new_resource.path) requirements.assert(:delete) do |a| a.assertion { ::File.writable?(@new_resource.path) } a.failure_message(Chef::Exceptions::InsufficientPermissions,"File #{@new_resource.path} exists but is not writable so it cannot be deleted") @@ -114,6 +143,8 @@ class Chef end def action_create + do_generate_content + do_validate_content do_unlink do_create_file do_contents_changes @@ -123,10 +154,10 @@ class Chef end def action_create_if_missing - if ::File.exists?(@new_resource.path) - Chef::Log.debug("#{@new_resource} exists at #{@new_resource.path} taking no action.") - else + unless ::File.exist?(@new_resource.path) action_create + else + Chef::Log.debug("#{@new_resource} exists at #{@new_resource.path} taking no action.") end end @@ -275,6 +306,15 @@ class Chef !file_class.symlink?(path) && ::File.file?(path) end + # like real_file? that follows (sane) symlinks + def symlink_to_real_file?(path) + begin + real_file?(::File.realpath(path)) + rescue Errno::ELOOP, Errno::ENOENT + false + end + end + # Similar to File.exist?, but also returns true in the case that the # named file is a broken symlink. def l_exist?(path) @@ -290,41 +330,42 @@ class Chef end end + def do_generate_content + # referencing the tempfile magically causes content to be generated + tempfile + end + + def tempfile_checksum + @tempfile_checksum ||= checksum(tempfile.path) + end + + def do_validate_content + if new_resource.checksum && tempfile && ( new_resource.checksum != tempfile_checksum ) + raise Chef::Exceptions::ChecksumMismatch.new(short_cksum(new_resource.checksum), short_cksum(tempfile_checksum)) + end + end + def do_unlink - @file_unlinked = false if @new_resource.force_unlink - if l_exist?(@new_resource.path) && !real_file?(@new_resource.path) + if needs_unlinking? # unlink things that aren't normal files description = "unlink #{file_type_string(@new_resource.path)} at #{@new_resource.path}" converge_by(description) do unlink(@new_resource.path) end - @current_resource.checksum = nil - @file_unlinked = true end end end - def file_unlinked? - @file_unlinked == true - end - def do_create_file - @file_created = false - if !::File.exists?(@new_resource.path) || file_unlinked? + if needs_creating? converge_by("create new file #{@new_resource.path}") do deployment_strategy.create(@new_resource.path) Chef::Log.info("#{@new_resource} created file #{@new_resource.path}") end - @file_created = true end end - # do_contents_changes needs to know if do_create_file created a file or not - def file_created? - @file_created == true - end - def do_backup(file = nil) Chef::Util::Backup.new(@new_resource, file).backup! end @@ -334,7 +375,7 @@ class Chef end def update_file_contents - do_backup unless file_created? + do_backup unless needs_creating? deployment_strategy.deploy(tempfile.path, ::File.realpath(@new_resource.path)) Chef::Log.info("#{@new_resource} updated file contents #{@new_resource.path}") if managing_content? @@ -353,7 +394,7 @@ class Chef # the file? on the next line suppresses the case in why-run when we have a not-file here that would have otherwise been removed if ::File.file?(@new_resource.path) && contents_changed? description = [ "update content in file #{@new_resource.path} from \ -#{short_cksum(@current_resource.checksum)} to #{short_cksum(checksum(tempfile.path))}" ] +#{short_cksum(@current_resource.checksum)} to #{short_cksum(tempfile_checksum)}" ] # Hide the diff output if the resource is marked as a sensitive resource if @new_resource.sensitive @@ -361,7 +402,7 @@ class Chef description << "suppressed sensitive resource" else diff.diff(@current_resource.path, tempfile.path) - @new_resource.diff( diff.for_reporting ) unless file_created? + @new_resource.diff( diff.for_reporting ) unless needs_creating? description << diff.for_output end @@ -401,11 +442,11 @@ class Chef def contents_changed? Chef::Log.debug "calculating checksum of #{tempfile.path} to compare with #{@current_resource.checksum}" - checksum(tempfile.path) != @current_resource.checksum + tempfile_checksum != @current_resource.checksum end def tempfile - content.tempfile + @tempfile ||= content.tempfile end def short_cksum(checksum) @@ -414,7 +455,6 @@ class Chef end def load_resource_attributes_from_file(resource) - if Chef::Platform.windows? # This is a work around for CHEF-3554. # OC-6534: is tracking the real fix for this workaround. @@ -426,6 +466,17 @@ class Chef acl_scanner.set_all! end + def managing_symlink? + !!@managing_symlink + end + + def needs_creating? + !!@needs_creating + end + + def needs_unlinking? + !!@needs_unlinking + end end end end |