We'll set these up on a per-test basis.
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use strict;
system("initdb -D postgres --locale C.UTF-8 ") == 0 or die;
system("pg_ctl -D postgres -o \"-F -p 6433 -h '' -k /tmp \" -w start") == 0 or die;
system("createdb -l C.UTF-8 -p 6433 hydra-test-suite") == 0 or die;
system("hydra-init") == 0 or die;
use strict;
my $fail = 0;
system("dropdb -p 6433 hydra-test-suite") == 0 or $fail = 1;
system("pg_ctl -D postgres -w stop") == 0 or $fail = 1;
system("chmod -R a+w nix") == 0 or $fail = 1;
system("rm -rf postgres data nix git-repo hg-repo svn-repo svn-checkout svn-checkout-repo bzr-repo bzr-checkout-repo darcs-repo") == 0 or $fail = 1;
system("rm -f .*-state") == 0 or $fail = 1;
exit $fail;