build: Run all the tests against the just-built daemon.

* test-env.in: New file.
* configure.ac: Add it to `AC_CONFIG_FILES' and `commands-exec'.
* config-daemon.ac: Set and substitute `GUIX_TEST_ROOT'.
* Makefile.am (SCM_LOG_COMPILER, SH_LOG_COMPILER): Use it in lieu of
  `pre-inst-env'.
* daemon.am (test_root): Remove
  (AM_TESTS_ENVIRONMENT): Remove `TEST_ROOT'.
  (clean-local): Use $(GUIX_TEST_ROOT); make files writable before
  removing them.guix_test_root
* tests/guix-daemon.sh: Remove `NIX_' variable settings; don't launch
  `guix-daemon'.

.gitignore

@@ -62,3 +62,4 @@ stamp-h[0-9]
 /guix-daemon
 /test-tmp
 /nix/scripts/list-runtime-roots
+/test-env

Makefile.am

@@ -181,10 +181,10 @@ TEST_EXTENSIONS = .scm .sh
 
 AM_TESTS_ENVIRONMENT = abs_top_srcdir="$(abs_top_srcdir)"
 
-SCM_LOG_COMPILER = $(top_builddir)/pre-inst-env $(GUILE)
+SCM_LOG_COMPILER = $(top_builddir)/test-env $(GUILE)
 AM_SCM_LOG_FLAGS = --no-auto-compile -L "$(top_srcdir)"
 
-SH_LOG_COMPILER = $(top_builddir)/pre-inst-env $(SHELL)
+SH_LOG_COMPILER = $(top_builddir)/test-env $(SHELL)
 AM_SH_LOG_FLAGS = -x -e
 
 EXTRA_DIST =					\

config-daemon.ac

@@ -92,6 +92,12 @@ if test "x$guix_build_daemon" = "xyes"; then
   dnl Check for <linux/fs.h> (for immutable file support).
   AC_CHECK_HEADERS([linux/fs.h])
 
+  dnl Temporary directory used to store the daemon's data.
+  AC_MSG_CHECKING([for unit test root])
+  GUIX_TEST_ROOT="`pwd`/test-tmp"
+  AC_MSG_RESULT([$GUIX_TEST_ROOT])
+  AC_SUBST([GUIX_TEST_ROOT])
+
   AC_CONFIG_FILES([nix/scripts/list-runtime-roots],
     [chmod +x nix/scripts/list-runtime-roots])
 fi

configure.ac

@@ -104,9 +104,10 @@ AC_CONFIG_FILES([Makefile
 		 guix-download
 		 guix-import
 		 guix-package
-		 pre-inst-env])
+		 pre-inst-env
+		 test-env])
 
 AC_CONFIG_COMMANDS([commands-exec],
-  [chmod +x guix-build guix-download guix-import guix-package pre-inst-env])
+  [chmod +x guix-build guix-download guix-import guix-package pre-inst-env test-env])
 
 AC_OUTPUT

daemon.am

@@ -155,15 +155,12 @@ EXTRA_DIST +=					\
   nix/AUTHORS					\
   nix/COPYING
 
-# Temporary directory used to store the daemon's data.
-test_root = $(abs_top_builddir)/test-tmp
-
 AM_TESTS_ENVIRONMENT +=				\
-  top_builddir="$(abs_top_builddir)"		\
-  TEST_ROOT="$(test_root)"
+  top_builddir="$(abs_top_builddir)"
 
 TESTS +=					\
   tests/guix-daemon.sh
 
 clean-local:
-	-rm -rf "$(test_root)"
+	-find "$(GUIX_TEST_ROOT)" | xargs chmod +w
+	-rm -rf "$(GUIX_TEST_ROOT)"

test-env.in

@@ -0,0 +1,53 @@
+#!/bin/sh
+
+# Guix --- Nix package management from Guile.         -*- coding: utf-8 -*-
+# Copyright (C) 2012 Ludovic Courtès <ludo@gnu.org>
+#
+# This file is part of Guix.
+#
+# Guix is free software; you can redistribute it and/or modify it
+# under the terms of the GNU General Public License as published by
+# the Free Software Foundation; either version 3 of the License, or (at
+# your option) any later version.
+#
+# Guix is distributed in the hope that it will be useful, but
+# WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+# GNU General Public License for more details.
+#
+# You should have received a copy of the GNU General Public License
+# along with Guix.  If not, see <http://www.gnu.org/licenses/>.
+
+# Usage: ./test-env COMMAND ARG...
+#
+# Run the daemon in the build directory, and run COMMAND within
+# `pre-inst-env'.  This is used to run unit tests with the just-built
+# daemon, unless `--disable-daemon' was passed at configure time.
+
+if [ -x "@abs_top_builddir@/guix-daemon" ]
+then
+    NIX_SUBSTITUTERS=""		# don't resort to substituters
+    NIX_IGNORE_SYMLINK_STORE=1	# in case the store is a symlink
+    NIX_STORE_DIR="@GUIX_TEST_ROOT@/store"
+    NIX_LOCALSTATE_DIR="@GUIX_TEST_ROOT@/var"
+    NIX_LOG_DIR="@GUIX_TEST_ROOT@/var/log/nix"
+    NIX_STATE_DIR="@GUIX_TEST_ROOT@/var/nix-$$" # allow for parallel tests
+    NIX_DB_DIR="@GUIX_TEST_ROOT@/db"
+    NIX_ROOT_FINDER="@abs_top_builddir@/nix/scripts/list-runtime-roots"
+    export NIX_SUBSTITUTERS NIX_IGNORE_SYMLINK_STORE NIX_STORE_DIR	\
+	NIX_LOCALSTATE_DIR NIX_LOG_DIR NIX_STATE_DIR NIX_DB_DIR		\
+	NIX_ROOT_FINDER
+
+    # Do that because store.scm calls `canonicalize-path' on it.
+    mkdir -p "$NIX_STORE_DIR"
+
+    # Launch the daemon without chroot support because is may be
+    # unavailable, for instance if we're not running as root.
+    "@abs_top_builddir@/guix-daemon" --disable-chroot &
+
+    daemon_pid=$!
+    trap "kill $daemon_pid ; rm -rf $NIX_STATE_DIR" EXIT
+fi
+
+"@abs_top_builddir@/pre-inst-env" "$@"
+exit $?

tests/guix-daemon.sh

@@ -22,27 +22,8 @@
 
 set -e
 
-NIX_SUBSTITUTERS=""		# don't resort to substituters
-NIX_IGNORE_SYMLINK_STORE=1	# in case the store is a symlink
-NIX_STORE_DIR="$TEST_ROOT/store"
-NIX_LOCALSTATE_DIR="$TEST_ROOT/var"
-NIX_LOG_DIR="$TEST_ROOT/var/log/nix"
-NIX_STATE_DIR="$TEST_ROOT/var/nix"
-NIX_DB_DIR="$TEST_ROOT/db"
-NIX_ROOT_FINDER="$top_builddir/nix/scripts/list-runtime-roots"
-export NIX_SUBSTITUTERS NIX_IGNORE_SYMLINK_STORE NIX_STORE_DIR	\
-    NIX_LOCALSTATE_DIR NIX_LOG_DIR NIX_STATE_DIR NIX_DB_DIR	\
-    NIX_ROOT_FINDER
-
 guix-daemon --version
 guix-build --version
 
-# Launch the daemon without chroot support because is may be
-# unavailable, for instance if we're not running as root.
-guix-daemon --disable-chroot &
-
-daemon_pid=$!
-trap "kill $daemon_pid" EXIT
-
 guix-build -e '(@ (distro packages bootstrap) %bootstrap-guile)'
 guix-build coreutils -n