Sponge of pipes
cmd1 $file | sponge $fileWith sponge at the end you can manipulate the file before and write to itself. But be careful if the commands before sponge exit for some reason the file might be lost and you produce a empty file.
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cmd1 $file | sponge $fileWith sponge at the end you can manipulate the file before and write to itself. But be careful if the commands before sponge exit for some reason the file might be lost and you produce a empty file.