Nix/tests/functional/gc-concurrent.builder.sh
John Ericson 68c81c7375 Put functional tests in tests/functional
I think it is bad for these reasons when `tests/` contains a mix of
functional and integration tests

 - Concepts is harder to understand, the documentation makes a good
   unit vs functional vs integration distinction, but when the
   integration tests are just two subdirs within `tests/` this is not
   clear.

 - Source filtering in the `flake.nix` is more complex. We need to
   filter out some of the dirs from `tests/`, rather than simply pick
   the dirs we want and take all of them. This is a good sign the
   structure of what we are trying to do is not matching the structure
   of the files.

With this change we have a clean:
```shell-session
$ git show 'HEAD:tests'
tree HEAD:tests

functional/
installer/
nixos/
```
2023-10-06 09:05:56 -04:00

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echo "Build started" > "$lockFifo"
mkdir $out
echo $(cat $input1/foo)$(cat $input2/bar) > $out/foobar
# Wait for someone to write on the fifo
cat "$lockFifo"
# $out should not have been GC'ed while we were sleeping, but just in
# case...
mkdir -p $out
# Check that the GC hasn't deleted the lock on our output.
test -e "$out.lock"
ln -s $input2 $out/input-2