Reproducibility terminology/definitions

[Bernhard M. Wiedemann]

On 08/11/2023 16.38, Pol Dellaiera wrote:

you define functions doing I/O as Impure functions.
But without I/O, no build output can be written, so all builds must use 
impure functions.


In practice we see non-determinism from approx 10 sources, such as 
documented in https://github.com/bmwiedemann/theunreproduciblepackage/

e.g.
https://github.com/bmwiedemann/theunreproduciblepackage/blob/master/race/race.2.sh

#!/bin/sh
racepart()
{
     input=$1
     sleep 0.1
     echo $input
}
for i in $(seq 1 10) ; do
     # & backgrounds the process to do parallel processing
     racepart $i &
done
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