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Contents
module Autoproj
module Ops
# Shamelessly stolen from ActiveSupport
def self.atomic_write(file_name, temp_dir = Dir.tmpdir)
require 'tempfile' unless defined?(Tempfile)
require 'fileutils' unless defined?(FileUtils)
temp_file = Tempfile.new(File.basename(file_name), temp_dir)
yield temp_file
temp_file.flush
begin temp_file.fsync
rescue NotImplementedError
end
temp_file.close
begin
# Get original file permissions
old_stat = File.stat(file_name)
rescue Errno::ENOENT
# No old permissions, write a temp file to determine the defaults
check_name = File.join(
File.dirname(file_name), ".permissions_check.#{Thread.current.object_id}.#{Process.pid}.#{rand(1000000)}")
File.open(check_name, "w") { }
old_stat = File.stat(check_name)
File.unlink(check_name)
end
# Overwrite original file with temp file
FileUtils.mv(temp_file.path, file_name)
# Set correct permissions on new file
File.chown(old_stat.uid, old_stat.gid, file_name)
File.chmod(old_stat.mode, file_name)
end
end
end
Version data entries
26 entries across 26 versions & 1 rubygems