Write to a file atomically. Useful for situations where you don‘t
want other processes or threads to see half-written files.
File.atomic_write("important.file") do |file|
file.write("hello")
end
If your temp directory is not on the same filesystem as the file
you‘re trying to write, you can provide a different temporary
directory.
File.atomic_write("/data/something.important", "/data/tmp") do |f|
file.write("hello")
end