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Make the repl test more robust

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Seen in https://github.com/DeterminateSystems/nix-src/actions/runs/15590867877/job/43909540271:

  nix-functional-tests> grep: repl_output: No such file or directory
  nix-functional-tests> +(repl.sh:174) cat repl_output

This is because there is a small possibility that the `nix repl` child
process hasn't created `repl_output` yet. So make sure it exists.

(cherry picked from commit 9eb46e9cc0)
This commit is contained in:
Eelco Dolstra 2025-06-11 19:14:31 +02:00 • committed by Mergify
parent c6d7a1bb42
commit 37fe2584c1
1 changed files with 2 additions and 1 deletions
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3
tests/functional/repl.sh
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@ -163,7 +163,8 @@ foo + baz
# - Re-eval it
# - Check that the result has changed
mkfifo repl_fifo
nix repl ./flake --experimental-features 'flakes' < repl_fifo > repl_output 2>&1 &
touch repl_output
nix repl ./flake --experimental-features 'flakes' < repl_fifo >> repl_output 2>&1 &
repl_pid=$!
exec 3>repl_fifo # Open fifo for writing
echo "changingThing" >&3