package_hash: add code to generate a hash for a package file

This will be included in the full hash of packages.

1 files changed, 84 insertions, 0 deletions

diff --git a/lib/spack/spack/test/package_hash.py b/lib/spack/spack/test/package_hash.py
new file mode 100644
index 0000000000..77768bb648
--- /dev/null
+++ b/lib/spack/spack/test/package_hash.py
@@ -0,0 +1,84 @@
+##############################################################################
+# Copyright (c) 2016, Lawrence Livermore National Security, LLC.
+# Produced at the Lawrence Livermore National Laboratory.
+#
+# This file is part of Spack.
+# Written by Todd Gamblin, tgamblin@llnl.gov, All rights reserved.
+# LLNL-CODE-647188
+#
+# For details, see https://software.llnl.gov/spack
+# Please also see the LICENSE file for our notice and the LGPL.
+#
+# This program 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) version 2.1 dated February 1999.
+#
+# This program 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 terms and
+# conditions of the GNU General Public License for more details.
+#
+# You should have received a copy of the GNU Lesser General Public License
+# along with this program; if not, write to the Free Software Foundation,
+# Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
+##############################################################################
+from spack.util.package_hash import package_hash, package_content
+from spack.spec import Spec
+
+
+def test_hash(tmpdir, builtin_mock, config):
+    package_hash("hash-test1@1.2")
+
+
+def test_different_variants(tmpdir, builtin_mock, config):
+    spec1 = Spec("hash-test1@1.2 +variantx")
+    spec2 = Spec("hash-test1@1.2 +varianty")
+    assert package_hash(spec1) == package_hash(spec2)
+
+
+def test_all_same_but_name(tmpdir, builtin_mock, config):
+    spec1 = Spec("hash-test1@1.2")
+    spec2 = Spec("hash-test2@1.2")
+    compare_sans_name(True, spec1, spec2)
+
+    spec1 = Spec("hash-test1@1.2 +varianty")
+    spec2 = Spec("hash-test2@1.2 +varianty")
+    compare_sans_name(True, spec1, spec2)
+
+
+def test_all_same_but_archive_hash(tmpdir, builtin_mock, config):
+    """
+    Archive hash is not intended to be reflected in Package hash.
+    """
+    spec1 = Spec("hash-test1@1.3")
+    spec2 = Spec("hash-test2@1.3")
+    compare_sans_name(True, spec1, spec2)
+
+
+def test_all_same_but_patch_contents(tmpdir, builtin_mock, config):
+    spec1 = Spec("hash-test1@1.1")
+    spec2 = Spec("hash-test2@1.1")
+    compare_sans_name(True, spec1, spec2)
+
+
+def test_all_same_but_patches_to_apply(tmpdir, builtin_mock, config):
+    spec1 = Spec("hash-test1@1.4")
+    spec2 = Spec("hash-test2@1.4")
+    compare_sans_name(True, spec1, spec2)
+
+
+def test_all_same_but_install(tmpdir, builtin_mock, config):
+    spec1 = Spec("hash-test1@1.5")
+    spec2 = Spec("hash-test2@1.5")
+    compare_sans_name(False, spec1, spec2)
+
+
+def compare_sans_name(eq, spec1, spec2):
+    content1 = package_content(spec1)
+    content1 = content1.replace(spec1.package.__class__.__name__, '')
+    content2 = package_content(spec2)
+    content2 = content2.replace(spec2.package.__class__.__name__, '')
+    if eq:
+        assert content1 == content2
+    else:
+        assert content1 != content2