${HYPERFINE_ITERATION} is not visible in prepare or conclude commands #781
Description
I thought I could use the ${HYPERFINE_ITERATION} env variable that is exposed (mentioned as a solution in #778) ; however this is only accessible in the main command of the iteration, not the prepare or conclude steps for each iteration.
So for example if I want to prepare , test and cleanup a series of files, I would do something like this (with echo for illustrative purposes) :
~/hyperfine --runs 5 --prepare 'echo touch file${HYPERFINE_ITERATION}.dat' \
'echo testing file${HYPERFINE_ITERATION}.dat' \
--conclude 'echo rm file${HYPERFINE_ITERATION}.dat' --show-output
However this does not work because the env var is not exposed in all the steps:
Benchmark 1: echo testing file${HYPERFINE_ITERATION}.dat
touch file.dat
testing file0.dat
rm file.dat
touch file.dat
testing file1.dat
rm file.dat
touch file.dat
testing file2.dat
rm file.dat
touch file.dat
testing file3.dat
rm file.dat
touch file.dat
testing file4.dat
rm file.dat
Time (mean ± σ): 90.7 µs ± 202.8 µs [User: 116.6 µs, System: 252.7 µs]
Range (min … max): 0.0 µs … 453.5 µs 5 runs
so it's not possible to prepare and clean up each file.