Tests can be run via spack test <test_name>

8 files changed, 325 insertions, 217 deletions

diff --git a/lib/spack/spack/cmd/test.py b/lib/spack/spack/cmd/test.py
new file mode 100755
index 0000000000..bc62798dda
--- /dev/null
+++ b/lib/spack/spack/cmd/test.py
@@ -0,0 +1,33 @@
+import spack
+import spack.packages as packages
+import spack.test
+from spack.utils import list_modules
+from spack.colify import colify
+from pprint import pprint
+
+description ="Run unit tests"
+
+def setup_parser(subparser):
+    subparser.add_argument(
+        'names', nargs='*', help="Names of packages to install")
+    subparser.add_argument(
+        '-a', '--all', action='store_true', dest='all', help="Run all tests")
+    subparser.add_argument(
+        '-v', '--verbose', action='store_true', dest='verbose',
+        help="verbose output")
+
+
+def test(parser, args):
+    if args.all:
+        for name in list_modules(spack.test_path):
+            print "Running Tests: %s" % name
+            spack.test.run(name, verbose=args.verbose)
+
+    elif not args.names:
+        print parser._subparsers
+        print "Available tests:"
+        colify(list_modules(spack.test_path))
+
+    else:
+        for name in  args.names:
+            spack.test.run(name, verbose=args.verbose)
diff --git a/lib/spack/spack/globals.py b/lib/spack/spack/globals.py
index b864c08533..34b9be5713 100644
--- a/lib/spack/spack/globals.py
+++ b/lib/spack/spack/globals.py
@@ -14,6 +14,7 @@ lib_path      = new_path(prefix, "lib", "spack")
 env_path      = new_path(lib_path, "env")
 module_path   = new_path(lib_path, "spack")
 packages_path = new_path(module_path, "packages")
+test_path     = new_path(module_path, "test")
 
 var_path      = new_path(prefix, "var", "spack")
 stage_path    = new_path(var_path, "stage")
diff --git a/lib/spack/spack/packages/__init__.py b/lib/spack/spack/packages/__init__.py
index c32738bd6a..7a43fcb52f 100644
--- a/lib/spack/spack/packages/__init__.py
+++ b/lib/spack/spack/packages/__init__.py
@@ -61,10 +61,8 @@ def installed_packages(**kwargs):
 
 def all_package_names():
     """Generator function for all packages."""
-    os.chdir(spack.packages_path)
-    for name in glob.glob("*.py"):
-        if name != '__init__.py':
-            yield re.sub('.py$', '', name)
+    for mod in list_modules(spack.packages_path):
+        yield mod
 
 
 def all_packages():
diff --git a/lib/spack/spack/test/__init__.py b/lib/spack/spack/test/__init__.py
new file mode 100644
index 0000000000..4b74c7642a
--- /dev/null
+++ b/lib/spack/spack/test/__init__.py
@@ -0,0 +1,13 @@
+import sys
+import unittest
+import spack
+
+def run(test_name, verbose=False):
+    __import__(__package__ + "." + test_name)
+
+    # This just runs unittest.main on the module with the provided name
+    test_module = getattr(spack.test, test_name)
+
+    verbosity=1
+    if verbose: verbosity = 2
+    unittest.main(module=test_module, argv=sys.argv[:1], verbosity=verbosity)
diff --git a/lib/spack/spack/test/test_versions.py b/lib/spack/spack/test/test_versions.py
deleted file mode 100755
index da3b61ec62..0000000000
--- a/lib/spack/spack/test/test_versions.py
+++ /dev/null
@@ -1,192 +0,0 @@
-#!/usr/bin/env python2.7
-"""\
-This file has a bunch of versions tests taken from the excellent version
-detection in Homebrew.
-"""
-import unittest
-import spack.version as version
-from spack.exception import *
-
-
-class VersionTest(unittest.TestCase):
-
-    def assert_not_detected(self, string):
-        self.assertRaises(UndetectableVersionException, version.parse, string)
-
-    def assert_detected(self, name, v, string):
-        parsed_name, parsed_v = version.parse(string)
-        self.assertEqual(parsed_name, name)
-        self.assertEqual(parsed_v, version.Version(v))
-
-
-    def test_wwwoffle_version(self):
-        self.assert_detected(
-            'wwwoffle', '2.9h', 'http://www.gedanken.demon.co.uk/download-wwwoffle/wwwoffle-2.9h.tgz')
-
-    def test_version_sourceforge_download(self):
-        self.assert_detected(
-            'foo_bar', '1.21', 'http://sourceforge.net/foo_bar-1.21.tar.gz/download')
-        self.assert_detected(
-            'foo_bar', '1.21', 'http://sf.net/foo_bar-1.21.tar.gz/download')
-
-    def test_no_version(self):
-        self.assert_not_detected('http://example.com/blah.tar')
-        self.assert_not_detected('foo')
-
-    def test_version_all_dots(self):
-        self.assert_detected(
-            'foo.bar.la', '1.14','http://example.com/foo.bar.la.1.14.zip')
-
-    def test_version_underscore_separator(self):
-        self.assert_detected(
-            'grc', '1.1', 'http://example.com/grc_1.1.tar.gz')
-
-    def test_boost_version_style(self):
-        self.assert_detected(
-            'boost', '1.39.0', 'http://example.com/boost_1_39_0.tar.bz2')
-
-    def test_erlang_version_style(self):
-        self.assert_detected(
-            'otp', 'R13B', 'http://erlang.org/download/otp_src_R13B.tar.gz')
-
-    def test_another_erlang_version_style(self):
-        self.assert_detected(
-            'otp', 'R15B01', 'https://github.com/erlang/otp/tarball/OTP_R15B01')
-
-    def test_yet_another_erlang_version_style(self):
-        self.assert_detected(
-            'otp', 'R15B03-1', 'https://github.com/erlang/otp/tarball/OTP_R15B03-1')
-
-    def test_p7zip_version_style(self):
-        self.assert_detected(
-            'p7zip', '9.04', 'http://kent.dl.sourceforge.net/sourceforge/p7zip/p7zip_9.04_src_all.tar.bz2')
-
-    def test_new_github_style(self):
-        self.assert_detected(
-            'libnet', '1.1.4', 'https://github.com/sam-github/libnet/tarball/libnet-1.1.4')
-
-    def test_gloox_beta_style(self):
-        self.assert_detected(
-            'gloox', '1.0-beta7', 'http://camaya.net/download/gloox-1.0-beta7.tar.bz2')
-
-    def test_sphinx_beta_style(self):
-        self.assert_detected(
-            'sphinx', '1.10-beta', 'http://sphinxsearch.com/downloads/sphinx-1.10-beta.tar.gz')
-
-    def test_astyle_verson_style(self):
-        self.assert_detected(
-            'astyle', '1.23', 'http://kent.dl.sourceforge.net/sourceforge/astyle/astyle_1.23_macosx.tar.gz')
-
-    def test_version_dos2unix(self):
-        self.assert_detected(
-            'dos2unix', '3.1', 'http://www.sfr-fresh.com/linux/misc/dos2unix-3.1.tar.gz')
-
-    def test_version_internal_dash(self):
-        self.assert_detected(
-            'foo-arse', '1.1-2', 'http://example.com/foo-arse-1.1-2.tar.gz')
-
-    def test_version_single_digit(self):
-        self.assert_detected(
-            'foo_bar', '45', 'http://example.com/foo_bar.45.tar.gz')
-
-    def test_noseparator_single_digit(self):
-        self.assert_detected(
-            'foo_bar', '45', 'http://example.com/foo_bar45.tar.gz')
-
-    def test_version_developer_that_hates_us_format(self):
-        self.assert_detected(
-            'foo-bar-la', '1.2.3', 'http://example.com/foo-bar-la.1.2.3.tar.gz')
-
-    def test_version_regular(self):
-        self.assert_detected(
-            'foo_bar', '1.21', 'http://example.com/foo_bar-1.21.tar.gz')
-
-    def test_version_github(self):
-        self.assert_detected(
-            'yajl', '1.0.5', 'http://github.com/lloyd/yajl/tarball/1.0.5')
-
-    def test_version_github_with_high_patch_number(self):
-        self.assert_detected(
-            'yajl', '1.2.34', 'http://github.com/lloyd/yajl/tarball/v1.2.34')
-
-    def test_yet_another_version(self):
-        self.assert_detected(
-            'mad', '0.15.1b', 'http://example.com/mad-0.15.1b.tar.gz')
-
-    def test_lame_version_style(self):
-        self.assert_detected(
-            'lame', '398-2', 'http://kent.dl.sourceforge.net/sourceforge/lame/lame-398-2.tar.gz')
-
-    def test_ruby_version_style(self):
-        self.assert_detected(
-            'ruby', '1.9.1-p243', 'ftp://ftp.ruby-lang.org/pub/ruby/1.9/ruby-1.9.1-p243.tar.gz')
-
-    def test_omega_version_style(self):
-        self.assert_detected(
-            'omega', '0.80.2', 'http://www.alcyone.com/binaries/omega/omega-0.80.2-src.tar.gz')
-
-    def test_rc_style(self):
-        self.assert_detected(
-            'libvorbis', '1.2.2rc1', 'http://downloads.xiph.org/releases/vorbis/libvorbis-1.2.2rc1.tar.bz2')
-
-    def test_dash_rc_style(self):
-        self.assert_detected(
-            'js', '1.8.0-rc1', 'http://ftp.mozilla.org/pub/mozilla.org/js/js-1.8.0-rc1.tar.gz')
-
-    def test_angband_version_style(self):
-        self.assert_detected(
-            'angband', '3.0.9b', 'http://rephial.org/downloads/3.0/angband-3.0.9b-src.tar.gz')
-
-    def test_stable_suffix(self):
-        self.assert_detected(
-            'libevent', '1.4.14b', 'http://www.monkey.org/~provos/libevent-1.4.14b-stable.tar.gz')
-
-    def test_debian_style_1(self):
-        self.assert_detected(
-            'sl', '3.03', 'http://ftp.de.debian.org/debian/pool/main/s/sl/sl_3.03.orig.tar.gz')
-
-    def test_debian_style_2(self):
-        self.assert_detected(
-            'mmv', '1.01b', 'http://ftp.de.debian.org/debian/pool/main/m/mmv/mmv_1.01b.orig.tar.gz')
-
-    def test_imagemagick_style(self):
-        self.assert_detected(
-            'ImageMagick', '6.7.5-7', 'http://downloads.sf.net/project/machomebrew/mirror/ImageMagick-6.7.5-7.tar.bz2')
-
-    def test_dash_version_dash_style(self):
-        self.assert_detected(
-            'antlr', '3.4', 'http://www.antlr.org/download/antlr-3.4-complete.jar')
-
-    def test_apache_version_style(self):
-        self.assert_detected(
-            'apache-cassandra', '1.2.0-rc2', 'http://www.apache.org/dyn/closer.cgi?path=/cassandra/1.2.0/apache-cassandra-1.2.0-rc2-bin.tar.gz')
-
-    def test_jpeg_style(self):
-        self.assert_detected(
-            'jpegsrc', '8d', 'http://www.ijg.org/files/jpegsrc.v8d.tar.gz')
-
-    def test_more_versions(self):
-        self.assert_detected(
-            'pypy', '1.4.1', 'http://pypy.org/download/pypy-1.4.1-osx.tar.bz2')
-        self.assert_detected(
-            'openssl', '0.9.8s', 'http://www.openssl.org/source/openssl-0.9.8s.tar.gz')
-        self.assert_detected(
-            'Xaw3d', '1.5E', 'ftp://ftp.visi.com/users/hawkeyd/X/Xaw3d-1.5E.tar.gz')
-        self.assert_detected(
-            'fann', '2.1.0beta', 'http://downloads.sourceforge.net/project/fann/fann/2.1.0beta/fann-2.1.0beta.zip')
-        self.assert_detected(
-            'grads', '2.0.1', 'ftp://iges.org/grads/2.0/grads-2.0.1-bin-darwin9.8-intel.tar.gz')
-        self.assert_detected(
-            'haxe', '2.08', 'http://haxe.org/file/haxe-2.08-osx.tar.gz')
-        self.assert_detected(
-            'imap', '2007f', 'ftp://ftp.cac.washington.edu/imap/imap-2007f.tar.gz')
-        self.assert_detected(
-            'suite3270', '3.3.12ga7', 'http://sourceforge.net/projects/x3270/files/x3270/3.3.12ga7/suite3270-3.3.12ga7-src.tgz')
-        self.assert_detected(
-            'synergy', '1.3.6p2', 'http://synergy.googlecode.com/files/synergy-1.3.6p2-MacOSX-Universal.zip')
-
-
-
-
-if __name__ == "__main__":
-    unittest.main(failfast=True)
diff --git a/lib/spack/spack/test/versions.py b/lib/spack/spack/test/versions.py
new file mode 100644
index 0000000000..78900dd0eb
--- /dev/null
+++ b/lib/spack/spack/test/versions.py
@@ -0,0 +1,245 @@
+#!/usr/bin/env python2.7
+"""\
+This file has a bunch of versions tests taken from the excellent version
+detection in Homebrew.
+"""
+import unittest
+import spack.version as ver
+from pprint import pprint
+
+
+class VersionTest(unittest.TestCase):
+    def assert_not_detected(self, string):
+        self.assertRaises(ver.UndetectableVersionError, ver.parse, string)
+
+    def assert_detected(self, name, v, string):
+        parsed_name, parsed_v = ver.parse(string)
+        self.assertEqual(parsed_name, name)
+        self.assertEqual(parsed_v, ver.Version(v))
+
+    def test_wwwoffle_version(self):
+        self.assert_detected(
+            'wwwoffle', '2.9h',
+            'http://www.gedanken.demon.co.uk/download-wwwoffle/wwwoffle-2.9h.tgz')
+
+    def test_version_sourceforge_download(self):
+        self.assert_detected(
+            'foo_bar', '1.21',
+            'http://sourceforge.net/foo_bar-1.21.tar.gz/download')
+        self.assert_detected(
+            'foo_bar', '1.21',
+            'http://sf.net/foo_bar-1.21.tar.gz/download')
+
+    def test_no_version(self):
+        self.assert_not_detected('http://example.com/blah.tar')
+        self.assert_not_detected('foo')
+
+    def test_version_all_dots(self):
+        self.assert_detected(
+            'foo.bar.la', '1.14','http://example.com/foo.bar.la.1.14.zip')
+
+    def test_version_underscore_separator(self):
+        self.assert_detected(
+            'grc', '1.1',
+            'http://example.com/grc_1.1.tar.gz')
+
+    def test_boost_version_style(self):
+        self.assert_detected(
+            'boost', '1.39.0',
+            'http://example.com/boost_1_39_0.tar.bz2')
+
+    def test_erlang_version_style(self):
+        self.assert_detected(
+            'otp', 'R13B',
+            'http://erlang.org/download/otp_src_R13B.tar.gz')
+
+    def test_another_erlang_version_style(self):
+        self.assert_detected(
+            'otp', 'R15B01',
+            'https://github.com/erlang/otp/tarball/OTP_R15B01')
+
+    def test_yet_another_erlang_version_style(self):
+        self.assert_detected(
+            'otp', 'R15B03-1',
+            'https://github.com/erlang/otp/tarball/OTP_R15B03-1')
+
+    def test_p7zip_version_style(self):
+        self.assert_detected(
+            'p7zip', '9.04',
+            'http://kent.dl.sourceforge.net/sourceforge/p7zip/p7zip_9.04_src_all.tar.bz2')
+
+    def test_new_github_style(self):
+        self.assert_detected(
+            'libnet', '1.1.4',
+            'https://github.com/sam-github/libnet/tarball/libnet-1.1.4')
+
+    def test_gloox_beta_style(self):
+        self.assert_detected(
+            'gloox', '1.0-beta7',
+            'http://camaya.net/download/gloox-1.0-beta7.tar.bz2')
+
+    def test_sphinx_beta_style(self):
+        self.assert_detected(
+            'sphinx', '1.10-beta',
+            'http://sphinxsearch.com/downloads/sphinx-1.10-beta.tar.gz')
+
+    def test_astyle_verson_style(self):
+        self.assert_detected(
+            'astyle', '1.23',
+            'http://kent.dl.sourceforge.net/sourceforge/astyle/astyle_1.23_macosx.tar.gz')
+
+    def test_version_dos2unix(self):
+        self.assert_detected(
+            'dos2unix', '3.1',
+            'http://www.sfr-fresh.com/linux/misc/dos2unix-3.1.tar.gz')
+
+    def test_version_internal_dash(self):
+        self.assert_detected(
+            'foo-arse', '1.1-2',
+            'http://example.com/foo-arse-1.1-2.tar.gz')
+
+    def test_version_single_digit(self):
+        self.assert_detected(
+            'foo_bar', '45',
+            'http://example.com/foo_bar.45.tar.gz')
+
+    def test_noseparator_single_digit(self):
+        self.assert_detected(
+            'foo_bar', '45',
+            'http://example.com/foo_bar45.tar.gz')
+
+    def test_version_developer_that_hates_us_format(self):
+        self.assert_detected(
+            'foo-bar-la', '1.2.3',
+            'http://example.com/foo-bar-la.1.2.3.tar.gz')
+
+    def test_version_regular(self):
+        self.assert_detected(
+            'foo_bar', '1.21',
+            'http://example.com/foo_bar-1.21.tar.gz')
+
+    def test_version_github(self):
+        self.assert_detected(
+            'yajl', '1.0.5',
+            'http://github.com/lloyd/yajl/tarball/1.0.5')
+
+    def test_version_github_with_high_patch_number(self):
+        self.assert_detected(
+            'yajl', '1.2.34',
+            'http://github.com/lloyd/yajl/tarball/v1.2.34')
+
+    def test_yet_another_version(self):
+        self.assert_detected(
+            'mad', '0.15.1b',
+            'http://example.com/mad-0.15.1b.tar.gz')
+
+    def test_lame_version_style(self):
+        self.assert_detected(
+            'lame', '398-2',
+            'http://kent.dl.sourceforge.net/sourceforge/lame/lame-398-2.tar.gz')
+
+    def test_ruby_version_style(self):
+        self.assert_detected(
+            'ruby', '1.9.1-p243',
+            'ftp://ftp.ruby-lang.org/pub/ruby/1.9/ruby-1.9.1-p243.tar.gz')
+
+    def test_omega_version_style(self):
+        self.assert_detected(
+            'omega', '0.80.2',
+            'http://www.alcyone.com/binaries/omega/omega-0.80.2-src.tar.gz')
+
+    def test_rc_style(self):
+        self.assert_detected(
+            'libvorbis', '1.2.2rc1',
+            'http://downloads.xiph.org/releases/vorbis/libvorbis-1.2.2rc1.tar.bz2')
+
+    def test_dash_rc_style(self):
+        self.assert_detected(
+            'js', '1.8.0-rc1',
+            'http://ftp.mozilla.org/pub/mozilla.org/js/js-1.8.0-rc1.tar.gz')
+
+    def test_angband_version_style(self):
+        self.assert_detected(
+            'angband', '3.0.9b',
+            'http://rephial.org/downloads/3.0/angband-3.0.9b-src.tar.gz')
+
+    def test_stable_suffix(self):
+        self.assert_detected(
+            'libevent', '1.4.14b',
+            'http://www.monkey.org/~provos/libevent-1.4.14b-stable.tar.gz')
+
+    def test_debian_style_1(self):
+        self.assert_detected(
+            'sl', '3.03',
+            'http://ftp.de.debian.org/debian/pool/main/s/sl/sl_3.03.orig.tar.gz')
+
+    def test_debian_style_2(self):
+        self.assert_detected(
+            'mmv', '1.01b',
+            'http://ftp.de.debian.org/debian/pool/main/m/mmv/mmv_1.01b.orig.tar.gz')
+
+    def test_imagemagick_style(self):
+        self.assert_detected(
+            'ImageMagick', '6.7.5-7',
+
+            'http://downloads.sf.net/project/machomebrew/mirror/ImageMagick-6.7.5-7.tar.bz2')
+
+    def test_dash_version_dash_style(self):
+        self.assert_detected(
+            'antlr', '3.4',
+            'http://www.antlr.org/download/antlr-3.4-complete.jar')
+
+    def test_apache_version_style(self):
+        self.assert_detected(
+            'apache-cassandra', '1.2.0-rc2',
+            'http://www.apache.org/dyn/closer.cgi?path=/cassandra/1.2.0/apache-cassandra-1.2.0-rc2-bin.tar.gz')
+
+    def test_jpeg_style(self):
+        self.assert_detected(
+            'jpegsrc', '8d',
+            'http://www.ijg.org/files/jpegsrc.v8d.tar.gz')
+
+    def test_pypy_version(self):
+        self.assert_detected(
+            'pypy', '1.4.1',
+            'http://pypy.org/download/pypy-1.4.1-osx.tar.bz2')
+
+    def test_openssl_version(self):
+        self.assert_detected(
+            'openssl', '0.9.8s',
+            'http://www.openssl.org/source/openssl-0.9.8s.tar.gz')
+
+    def test_xaw3d_version(self):
+        self.assert_detected(
+            'Xaw3d', '1.5E',
+            'ftp://ftp.visi.com/users/hawkeyd/X/Xaw3d-1.5E.tar.gz')
+
+    def test_fann_version(self):
+        self.assert_detected(
+            'fann', '2.1.0beta',
+            'http://downloads.sourceforge.net/project/fann/fann/2.1.0beta/fann-2.1.0beta.zip')
+
+    def test_iges_version(self):
+        self.assert_detected(
+            'grads', '2.0.1',
+            'ftp://iges.org/grads/2.0/grads-2.0.1-bin-darwin9.8-intel.tar.gz')
+
+    def test_haxe_version(self):
+        self.assert_detected(
+            'haxe', '2.08',
+            'http://haxe.org/file/haxe-2.08-osx.tar.gz')
+
+    def test_imap_version(self):
+        self.assert_detected(
+            'imap', '2007f',
+            'ftp://ftp.cac.washington.edu/imap/imap-2007f.tar.gz')
+
+    def test_suite3270_version(self):
+        self.assert_detected(
+            'suite3270', '3.3.12ga7',
+            'http://sourceforge.net/projects/x3270/files/x3270/3.3.12ga7/suite3270-3.3.12ga7-src.tgz')
+
+    def test_synergy_version(self):
+        self.assert_detected(
+            'synergy', '1.3.6p2',
+            'http://synergy.googlecode.com/files/synergy-1.3.6p2-MacOSX-Universal.zip')
diff --git a/lib/spack/spack/utils.py b/lib/spack/spack/utils.py
index 09e4985275..465c83caf9 100644
--- a/lib/spack/spack/utils.py
+++ b/lib/spack/spack/utils.py
@@ -1,6 +1,7 @@
 import os
 import re
 import errno
+import glob
 import shutil
 import subprocess
 import multiprocessing
@@ -35,6 +36,15 @@ def install(src, dest):
     shutil.copy(src, dest)
 
 
+def list_modules(directory):
+    """Lists all of the modules, excluding __init__.py, in
+       a particular directory."""
+    os.chdir(directory)
+    for name in glob.glob("*.py"):
+        if name != '__init__.py':
+            yield re.sub('.py$', '', name)
+
+
 @contextmanager
 def working_dir(dirname):
     orig_dir = os.getcwd()
diff --git a/lib/spack/spack/version.py b/lib/spack/spack/version.py
index 52b89883f7..e35dfe7297 100644
--- a/lib/spack/spack/version.py
+++ b/lib/spack/spack/version.py
@@ -5,27 +5,6 @@ import utils
 import spack.error as serr
 
 
-class VersionParseError(serr.SpackError):
-    """Raised when the version module can't parse something."""
-    def __init__(self, msg, spec):
-        super(VersionParseError, self).__init__(msg)
-        self.spec = spec
-
-
-class UndetectableVersionError(VersionParseError):
-    """Raised when we can't parse a version from a string."""
-    def __init__(self, spec):
-        super(UndetectableVersionError, self).__init__(
-            "Couldn't detect version in: " + spec, spec)
-
-
-class UndetectableNameError(VersionParseError):
-    """Raised when we can't parse a package name from a string."""
-    def __init__(self, spec):
-        super(UndetectableNameError, self).__init__(
-            "Couldn't parse package name in: " + spec)
-
-
 class Version(object):
     """Class to represent versions"""
     def __init__(self, version_string):
@@ -81,6 +60,27 @@ def canonical(v):
     return tuple(intify(v) for v in re.split(r'[_.-]+', v))
 
 
+class VersionParseError(serr.SpackError):
+    """Raised when the version module can't parse something."""
+    def __init__(self, msg, spec):
+        super(VersionParseError, self).__init__(msg)
+        self.spec = spec
+
+
+class UndetectableVersionError(VersionParseError):
+    """Raised when we can't parse a version from a string."""
+    def __init__(self, spec):
+        super(UndetectableVersionError, self).__init__(
+            "Couldn't detect version in: " + spec, spec)
+
+
+class UndetectableNameError(VersionParseError):
+    """Raised when we can't parse a package name from a string."""
+    def __init__(self, spec):
+        super(UndetectableNameError, self).__init__(
+            "Couldn't parse package name in: " + spec)
+
+
 def parse_version_string_with_indices(spec):
     """Try to extract a version string from a filename or URL.  This is taken
        largely from Homebrew's Version class."""