tests: move to t, allow yath test from root

By moving the tests subdirectory to t, we gain the ability to run `yath
test` with no arguments from inside `nix develop` in the root of the
the repo.

(`nix develop` is necessary in order to set the proper env vars for
`yath` to find our test libraries.)

t/Makefile.am

@@ -0,0 +1,42 @@
+TESTS_ENVIRONMENT = \
+  BZR_HOME="$(abs_builddir)/data"			\
+  HYDRA_DBI="dbi:Pg:dbname=hydra-test-suite;port=6433"	\
+  HYDRA_DATA="$(abs_builddir)/data"			\
+  HYDRA_HOME="$(top_srcdir)/src"			\
+  HYDRA_CONFIG=						\
+  NIX_REMOTE=						\
+  NIX_REMOTE_SYSTEMS=					\
+  NIX_CONF_DIR="$(abs_builddir)/nix/etc/nix"		\
+  NIX_STATE_DIR="$(abs_builddir)/nix/var/nix"		\
+  NIX_MANIFESTS_DIR="$(abs_builddir)/nix/var/nix/manifests"	\
+  NIX_STORE_DIR="$(abs_builddir)/nix/store"			\
+  NIX_LOG_DIR="$(abs_builddir)/nix/var/log/nix"		\
+  NIX_BUILD_HOOK=					\
+  PGHOST=/tmp	\
+  PERL5LIB="$(srcdir):$(abs_top_srcdir)/src/lib:$$PERL5LIB"	\
+  PYTHONPATH= \
+  PATH=$(abs_top_srcdir)/src/hydra-evaluator:$(abs_top_srcdir)/src/script:$(abs_top_srcdir)/src/hydra-eval-jobs:$(abs_top_srcdir)/src/hydra-queue-runner:$$PATH \
+  perl -w
+
+EXTRA_DIST = \
+  $(wildcard *.pm) \
+  $(wildcard jobs/*.nix) \
+  $(wildcard jobs/*.sh) \
+  $(TESTS)
+
+TESTS = \
+  test.pl
+
+check_SCRIPTS = repos
+
+repos: dirs
+
+dirs:
+	mkdir -p data
+	touch data/hydra.conf
+	mkdir -p nix
+	mkdir -p nix/etc/nix
+	touch nix/etc/nix/nix.conf
+	echo "sandbox = false" >> nix/etc/nix/nix.conf
+	mkdir -p nix/store
+	mkdir -p nix/var