Port package sanity unit tests to audits (#32405)

6 files changed, 222 insertions, 318 deletions

diff --git a/lib/spack/spack/audit.py b/lib/spack/spack/audit.py
index 8957320e48..ee974a19b1 100644
--- a/lib/spack/spack/audit.py
+++ b/lib/spack/spack/audit.py
@@ -35,9 +35,11 @@ Calls to each of these functions are triggered by the ``run`` method of
 the decorator object, that will forward the keyword arguments passed
 as input.
 """
+import ast
 import collections
 import inspect
 import itertools
+import pickle
 import re
 
 from six.moves.urllib.request import urlopen
@@ -49,6 +51,7 @@ import spack.config
 import spack.patch
 import spack.repo
 import spack.spec
+import spack.util.crypto
 import spack.variant
 
 #: Map an audit tag to a list of callables implementing checks
@@ -261,6 +264,14 @@ package_attributes = AuditClass(
 )
 
 
+package_properties = AuditClass(
+    group="packages",
+    tag="PKG-PROPERTIES",
+    description="Sanity checks on properties a package should maintain",
+    kwargs=("pkgs",),
+)
+
+
 #: Sanity checks on linting
 # This can take some time, so it's run separately from packages
 package_https_directives = AuditClass(
@@ -353,6 +364,145 @@ def _search_for_reserved_attributes_names_in_packages(pkgs, error_cls):
     return errors
 
 
+@package_properties
+def _ensure_all_package_names_are_lowercase(pkgs, error_cls):
+    """Ensure package names are lowercase and consistent"""
+    badname_regex, errors = re.compile(r"[_A-Z]"), []
+    for pkg_name in pkgs:
+        if badname_regex.search(pkg_name):
+            error_msg = "Package name '{}' is either lowercase or conatine '_'".format(pkg_name)
+            errors.append(error_cls(error_msg, []))
+    return errors
+
+
+@package_properties
+def _ensure_packages_are_pickeleable(pkgs, error_cls):
+    """Ensure that package objects are pickleable"""
+    errors = []
+    for pkg_name in pkgs:
+        pkg_cls = spack.repo.path.get_pkg_class(pkg_name)
+        pkg = pkg_cls(spack.spec.Spec(pkg_name))
+        try:
+            pickle.dumps(pkg)
+        except Exception as e:
+            error_msg = "Package '{}' failed to pickle".format(pkg_name)
+            details = ["{}".format(str(e))]
+            errors.append(error_cls(error_msg, details))
+    return errors
+
+
+@package_properties
+def _ensure_packages_are_unparseable(pkgs, error_cls):
+    """Ensure that all packages can unparse and that unparsed code is valid Python"""
+    import spack.util.package_hash as ph
+
+    errors = []
+    for pkg_name in pkgs:
+        try:
+            source = ph.canonical_source(pkg_name, filter_multimethods=False)
+        except Exception as e:
+            error_msg = "Package '{}' failed to unparse".format(pkg_name)
+            details = ["{}".format(str(e))]
+            errors.append(error_cls(error_msg, details))
+            continue
+
+        try:
+            compile(source, "internal", "exec", ast.PyCF_ONLY_AST)
+        except Exception as e:
+            error_msg = "The unparsed package '{}' failed to compile".format(pkg_name)
+            details = ["{}".format(str(e))]
+            errors.append(error_cls(error_msg, details))
+
+    return errors
+
+
+@package_properties
+def _ensure_all_versions_can_produce_a_fetcher(pkgs, error_cls):
+    """Ensure all versions in a package can produce a fetcher"""
+    errors = []
+    for pkg_name in pkgs:
+        pkg_cls = spack.repo.path.get_pkg_class(pkg_name)
+        pkg = pkg_cls(spack.spec.Spec(pkg_name))
+        try:
+            spack.fetch_strategy.check_pkg_attributes(pkg)
+            for version in pkg.versions:
+                assert spack.fetch_strategy.for_package_version(pkg, version)
+        except Exception as e:
+            error_msg = "The package '{}' cannot produce a fetcher for some of its versions"
+            details = ["{}".format(str(e))]
+            errors.append(error_cls(error_msg.format(pkg_name), details))
+    return errors
+
+
+@package_properties
+def _ensure_docstring_and_no_fixme(pkgs, error_cls):
+    """Ensure the package has a docstring and no fixmes"""
+    errors = []
+    fixme_regexes = [
+        re.compile(r"remove this boilerplate"),
+        re.compile(r"FIXME: Put"),
+        re.compile(r"FIXME: Add"),
+        re.compile(r"example.com"),
+    ]
+    for pkg_name in pkgs:
+        details = []
+        filename = spack.repo.path.filename_for_package_name(pkg_name)
+        with open(filename, "r") as package_file:
+            for i, line in enumerate(package_file):
+                pattern = next((r for r in fixme_regexes if r.search(line)), None)
+                if pattern:
+                    details.append(
+                        "%s:%d: boilerplate needs to be removed: %s" % (filename, i, line.strip())
+                    )
+        if details:
+            error_msg = "Package '{}' contains boilerplate that need to be removed"
+            errors.append(error_cls(error_msg.format(pkg_name), details))
+
+        pkg_cls = spack.repo.path.get_pkg_class(pkg_name)
+        if not pkg_cls.__doc__:
+            error_msg = "Package '{}' miss a docstring"
+            errors.append(error_cls(error_msg.format(pkg_name), []))
+
+    return errors
+
+
+@package_properties
+def _ensure_all_packages_use_sha256_checksums(pkgs, error_cls):
+    """Ensure no packages use md5 checksums"""
+    errors = []
+    for pkg_name in pkgs:
+        pkg_cls = spack.repo.path.get_pkg_class(pkg_name)
+        if pkg_cls.manual_download:
+            continue
+
+        pkg = pkg_cls(spack.spec.Spec(pkg_name))
+
+        def invalid_sha256_digest(fetcher):
+            if getattr(fetcher, "digest", None):
+                h = spack.util.crypto.hash_algo_for_digest(fetcher.digest)
+                if h != "sha256":
+                    return h, True
+            return None, False
+
+        error_msg = "Package '{}' does not use sha256 checksum".format(pkg_name)
+        details = []
+        for v, args in pkg.versions.items():
+            fetcher = spack.fetch_strategy.for_package_version(pkg, v)
+            digest, is_bad = invalid_sha256_digest(fetcher)
+            if is_bad:
+                details.append("{}@{} uses {}".format(pkg_name, v, digest))
+
+        for _, resources in pkg.resources.items():
+            for resource in resources:
+                digest, is_bad = invalid_sha256_digest(resource.fetcher)
+                if is_bad:
+                    details.append("Resource in '{}' uses {}".format(pkg_name, digest))
+        if details:
+            errors.append(error_cls(error_msg, details))
+
+    return errors
+
+
 @package_https_directives
 def _linting_package_file(pkgs, error_cls):
     """Check for correctness of links"""
@@ -491,6 +641,36 @@ def _unknown_variants_in_dependencies(pkgs, error_cls):
 
 
 @package_directives
+def _ensure_variant_defaults_are_parsable(pkgs, error_cls):
+    """Ensures that variant defaults are present and parsable from cli"""
+    errors = []
+    for pkg_name in pkgs:
+        pkg_cls = spack.repo.path.get_pkg_class(pkg_name)
+        for variant_name, entry in pkg_cls.variants.items():
+            variant, _ = entry
+            default_is_parsable = (
+                # Permitting a default that is an instance on 'int' permits
+                # to have foo=false or foo=0. Other falsish values are
+                # not allowed, since they can't be parsed from cli ('foo=')
+                isinstance(variant.default, int)
+                or variant.default
+            )
+            if not default_is_parsable:
+                error_msg = "Variant '{}' of package '{}' has a bad default value"
+                errors.append(error_cls(error_msg.format(variant_name, pkg_name), []))
+                continue
+
+            vspec = variant.make_default()
+            try:
+                variant.validate_or_raise(vspec, pkg_cls=pkg_cls)
+            except spack.variant.InvalidVariantValueError:
+                error_msg = "The variant '{}' default value in package '{}' cannot be validated"
+                errors.append(error_cls(error_msg.format(variant_name, pkg_name), []))
+
+    return errors
+
+
+@package_directives
 def _version_constraints_are_satisfiable_by_some_version_in_repo(pkgs, error_cls):
     """Report if version constraints used in directives are not satisfiable"""
     errors = []
diff --git a/lib/spack/spack/test/audit.py b/lib/spack/spack/test/audit.py
index 890a8dcaf8..eded1a92f2 100644
--- a/lib/spack/spack/test/audit.py
+++ b/lib/spack/spack/test/audit.py
@@ -9,18 +9,20 @@ import spack.config
 
 
 @pytest.mark.parametrize(
-    "packages,expected_error",
+    # PKG-PROPERTIES are ubiquitous in mock packages, since they don't use sha256
+    # and they don't change the example.com URL very often.
+    "packages,expected_errors",
     [
         # A non existing variant is used in a conflict directive
-        (["wrong-variant-in-conflicts"], "PKG-DIRECTIVES"),
+        (["wrong-variant-in-conflicts"], ["PKG-DIRECTIVES", "PKG-PROPERTIES"]),
         # The package declares a non-existing dependency
-        (["missing-dependency"], "PKG-DIRECTIVES"),
+        (["missing-dependency"], ["PKG-DIRECTIVES", "PKG-PROPERTIES"]),
         # The package use a non existing variant in a depends_on directive
-        (["wrong-variant-in-depends-on"], "PKG-DIRECTIVES"),
+        (["wrong-variant-in-depends-on"], ["PKG-DIRECTIVES", "PKG-PROPERTIES"]),
         # This package has a GitHub patch URL without full_index=1
-        (["invalid-github-patch-url"], "PKG-DIRECTIVES"),
+        (["invalid-github-patch-url"], ["PKG-DIRECTIVES", "PKG-PROPERTIES"]),
         # This package has a stand-alone 'test' method in build-time callbacks
-        (["test-build-callbacks"], "PKG-DIRECTIVES"),
+        (["test-build-callbacks"], ["PKG-DIRECTIVES", "PKG-PROPERTIES"]),
         # This package has no issues
         (["mpileaks"], None),
         # This package has a conflict with a trigger which cannot constrain the constraint
@@ -28,15 +30,16 @@ import spack.config
         (["unconstrainable-conflict"], None),
     ],
 )
-def test_package_audits(packages, expected_error, mock_packages):
+def test_package_audits(packages, expected_errors, mock_packages):
     reports = spack.audit.run_group("packages", pkgs=packages)
 
     # Check that errors were reported only for the expected failure
     actual_errors = [check for check, errors in reports if errors]
-    if expected_error:
-        assert [expected_error] == actual_errors
+    msg = [str(e) for _, errors in reports for e in errors]
+    if expected_errors:
+        assert expected_errors == actual_errors, msg
     else:
-        assert not actual_errors
+        assert not actual_errors, msg
 
 
 # Data used in the test below to audit the double definition of a compiler
diff --git a/lib/spack/spack/test/package_sanity.py b/lib/spack/spack/test/package_sanity.py
deleted file mode 100644
index ba98ccf2a9..0000000000
--- a/lib/spack/spack/test/package_sanity.py
+++ /dev/null
@@ -1,300 +0,0 @@
-# Copyright 2013-2022 Lawrence Livermore National Security, LLC and other
-# Spack Project Developers. See the top-level COPYRIGHT file for details.
-#
-# SPDX-License-Identifier: (Apache-2.0 OR MIT)
-"""This test does sanity checks on Spack's builtin package database."""
-import ast
-import os.path
-import pickle
-import re
-
-import pytest
-
-import llnl.util.tty as tty
-
-# A few functions from this module are used to
-# do sanity checks only on packagess modified by a PR
-import spack.cmd.style as style
-import spack.fetch_strategy
-import spack.package_base
-import spack.paths
-import spack.repo
-import spack.spec
-import spack.util.crypto as crypto
-import spack.util.executable as executable
-import spack.util.package_hash as ph
-import spack.variant
-
-
-def check_repo():
-    """Get all packages in the builtin repo to make sure they work."""
-    for name in spack.repo.all_package_names():
-        spack.repo.path.get_pkg_class(name)
-
-
-@pytest.mark.maybeslow
-def test_get_all_packages():
-    """Get all packages once and make sure that works."""
-    check_repo()
-
-
-def test_packages_are_pickleable():
-    failed_to_pickle = list()
-    for name in spack.repo.all_package_names():
-        pkg_cls = spack.repo.path.get_pkg_class(name)
-        pkg = pkg_cls(spack.spec.Spec(name))
-        try:
-            pickle.dumps(pkg)
-        except Exception:
-            # If there are any failures, keep track of all packages that aren't
-            # pickle-able and re-run the pickling later on to recreate the
-            # error
-            failed_to_pickle.append(name)
-
-    if failed_to_pickle:
-        tty.msg("The following packages failed to pickle: " + ", ".join(failed_to_pickle))
-
-        for name in failed_to_pickle:
-            pkg_cls = spack.repo.path.get_pkg_class(name)
-            pkg = pkg_cls(spack.spec.Spec(name))
-            pickle.dumps(pkg)
-
-
-def test_packages_are_unparseable():
-    """Ensure that all packages can unparse and that unparsed code is valid Python."""
-    failed_to_unparse = []
-    failed_to_compile = []
-
-    for name in spack.repo.all_package_names():
-        try:
-            source = ph.canonical_source(name, filter_multimethods=False)
-        except Exception:
-            failed_to_unparse.append(name)
-
-        try:
-            compile(source, "internal", "exec", ast.PyCF_ONLY_AST)
-        except Exception:
-            failed_to_compile.append(name)
-
-    if failed_to_unparse:
-        tty.msg("The following packages failed to unparse: " + ", ".join(failed_to_unparse))
-        assert False
-
-    if failed_to_compile:
-        tty.msg(
-            "The following unparsed packages failed to compile: " + ", ".join(failed_to_compile)
-        )
-        assert False
-
-
-def test_repo_getpkg_names_and_classes():
-    """Ensure that all_packages/names/classes are consistent."""
-    names = spack.repo.path.all_package_names()
-    print(names)
-    classes = spack.repo.path.all_package_classes()
-    print(list(classes))
-
-    for name, cls in zip(names, classes):
-        assert cls.name == name
-
-
-def test_get_all_mock_packages():
-    """Get the mock packages once each too."""
-    db = spack.repo.RepoPath(spack.paths.mock_packages_path)
-    with spack.repo.use_repositories(db):
-        check_repo()
-
-
-def test_all_versions_are_lowercase():
-    """Spack package names must be lowercase, and use `-` instead of `_`."""
-    errors = []
-    for name in spack.repo.all_package_names():
-        if re.search(r"[_A-Z]", name):
-            errors.append(name)
-
-    assert len(errors) == 0
-
-
-def test_all_virtual_packages_have_default_providers():
-    """All virtual packages must have a default provider explicitly set."""
-    defaults = spack.config.get("packages", scope="defaults")
-    default_providers = defaults["all"]["providers"]
-    providers = spack.repo.path.provider_index.providers
-    default_providers_filename = spack.config.config.scopes["defaults"].get_section_filename(
-        "packages"
-    )
-    for provider in providers:
-        assert provider in default_providers, (
-            "all providers must have a default in %s" % default_providers_filename
-        )
-
-
-def test_package_version_consistency():
-    """Make sure all versions on builtin packages produce a fetcher."""
-    for name in spack.repo.all_package_names():
-        pkg_cls = spack.repo.path.get_pkg_class(name)
-        pkg = pkg_cls(spack.spec.Spec(name))
-        spack.fetch_strategy.check_pkg_attributes(pkg)
-        for version in pkg.versions:
-            assert spack.fetch_strategy.for_package_version(pkg, version)
-
-
-def test_no_fixme():
-    """Packages should not contain any boilerplate such as
-    FIXME or example.com."""
-    errors = []
-    fixme_regexes = [
-        r"remove this boilerplate",
-        r"FIXME: Put",
-        r"FIXME: Add",
-        r"example.com",
-    ]
-    for name in spack.repo.all_package_names():
-        filename = spack.repo.path.filename_for_package_name(name)
-        with open(filename, "r") as package_file:
-            for i, line in enumerate(package_file):
-                pattern = next((r for r in fixme_regexes if re.search(r, line)), None)
-                if pattern:
-                    errors.append(
-                        "%s:%d: boilerplate needs to be removed: %s" % (filename, i, line.strip())
-                    )
-            assert [] == errors
-
-
-def test_docstring():
-    """Ensure that every package has a docstring."""
-    for name in spack.repo.all_package_names():
-        pkg_cls = spack.repo.path.get_pkg_class(name)
-        assert pkg_cls.__doc__
-
-
-def test_all_packages_use_sha256_checksums():
-    """Make sure that no packages use md5 checksums."""
-
-    errors = []
-    for name in spack.repo.all_package_names():
-        pkg_cls = spack.repo.path.get_pkg_class(name)
-        pkg = pkg_cls(spack.spec.Spec(name))
-
-        # for now, don't enforce on packages that require manual downloads
-        # TODO: eventually fix these, too.
-        if pkg.manual_download:
-            continue
-
-        def invalid_sha256_digest(fetcher):
-            if getattr(fetcher, "digest", None):
-                h = crypto.hash_algo_for_digest(fetcher.digest)
-                if h != "sha256":
-                    return h
-
-        for v, args in pkg.versions.items():
-            fetcher = spack.fetch_strategy.for_package_version(pkg, v)
-            bad_digest = invalid_sha256_digest(fetcher)
-            if bad_digest:
-                errors.append(
-                    "All packages must use sha256 checksums. %s@%s uses %s."
-                    % (name, v, bad_digest)
-                )
-
-        for _, resources in pkg.resources.items():
-            for resource in resources:
-                bad_digest = invalid_sha256_digest(resource.fetcher)
-                if bad_digest:
-                    errors.append(
-                        "All packages must use sha256 checksums."
-                        "Resource in %s uses %s." % (name, bad_digest)
-                    )
-
-    assert [] == errors
-
-
-def test_api_for_build_and_run_environment():
-    """Ensure that every package uses the correct API to set build and
-    run environment, and not the old one.
-    """
-    failing = []
-    for pkg_cls in spack.repo.path.all_package_classes():
-        add_to_list = hasattr(pkg_cls, "setup_environment") or hasattr(
-            pkg_cls, "setup_dependent_environment"
-        )
-        if add_to_list:
-            failing.append(pkg_cls)
-
-    msg = (
-        "there are {0} packages using the old API to set build "
-        "and run environment [{1}], for further information see "
-        "https://github.com/spack/spack/pull/11115"
-    )
-    assert not failing, msg.format(len(failing), ",".join(x.name for x in failing))
-
-
-@pytest.mark.skipif(not executable.which("git"), reason="requires git to be installed")
-def test_prs_update_old_api():
-    """Ensures that every package modified in a PR doesn't contain
-    deprecated calls to any method.
-    """
-    ref = os.getenv("GITHUB_BASE_REF")
-    if not ref:
-        pytest.skip("No base ref found")
-
-    changed_package_files = [x for x in style.changed_files(base=ref) if style.is_package(x)]
-    failing = []
-    for file in changed_package_files:
-        if "builtin.mock" not in file:  # don't restrict packages for tests
-            name = os.path.basename(os.path.dirname(file))
-            pkg_cls = spack.repo.path.get_pkg_class(name)
-            pkg = pkg_cls(spack.spec.Spec(name))
-
-            failed = hasattr(pkg, "setup_environment") or hasattr(
-                pkg, "setup_dependent_environment"
-            )
-            if failed:
-                failing.append(name)
-
-    msg = (
-        "there are {0} packages using the old API to set build "
-        "and run environment [{1}], for further information see "
-        "https://github.com/spack/spack/pull/11115"
-    )
-    assert not failing, msg.format(len(failing), ",".join(failing))
-
-
-def test_all_dependencies_exist():
-    """Make sure no packages have nonexisting dependencies."""
-    missing = {}
-    pkgs = [pkg for pkg in spack.repo.path.all_package_names()]
-    spack.package_base.possible_dependencies(*pkgs, transitive=True, missing=missing)
-
-    lines = ["%s: [%s]" % (name, ", ".join(deps)) for name, deps in missing.items()]
-    assert not missing, "These packages have missing dependencies:\n" + ("\n".join(lines))
-
-
-def test_variant_defaults_are_parsable_from_cli():
-    """Ensures that variant defaults are parsable from cli."""
-    failing = []
-    for pkg_cls in spack.repo.path.all_package_classes():
-        for variant_name, entry in pkg_cls.variants.items():
-            variant, _ = entry
-            default_is_parsable = (
-                # Permitting a default that is an instance on 'int' permits
-                # to have foo=false or foo=0. Other falsish values are
-                # not allowed, since they can't be parsed from cli ('foo=')
-                isinstance(variant.default, int)
-                or variant.default
-            )
-            if not default_is_parsable:
-                failing.append((pkg_cls.name, variant_name))
-    assert not failing
-
-
-def test_variant_defaults_listed_explicitly_in_values():
-    failing = []
-    for pkg_cls in spack.repo.path.all_package_classes():
-        for variant_name, entry in pkg_cls.variants.items():
-            variant, _ = entry
-            vspec = variant.make_default()
-            try:
-                variant.validate_or_raise(vspec, pkg_cls=pkg_cls)
-            except spack.variant.InvalidVariantValueError:
-                failing.append((pkg_cls.name, variant.name))
-    assert not failing
diff --git a/lib/spack/spack/test/repo.py b/lib/spack/spack/test/repo.py
index 1ab0a7dd5c..cb376d9430 100644
--- a/lib/spack/spack/test/repo.py
+++ b/lib/spack/spack/test/repo.py
@@ -121,3 +121,23 @@ def test_relative_import_spack_packages_as_python_modules(mock_packages):
 
     assert isinstance(Mpileaks, spack.package_base.PackageMeta)
     assert issubclass(Mpileaks, spack.package_base.Package)
+
+
+def test_all_virtual_packages_have_default_providers():
+    """All virtual packages must have a default provider explicitly set."""
+    defaults = spack.config.get("packages", scope="defaults")
+    default_providers = defaults["all"]["providers"]
+    providers = spack.repo.path.provider_index.providers
+    default_providers_filename = spack.config.config.scopes["defaults"].get_section_filename(
+        "packages"
+    )
+    for provider in providers:
+        assert provider in default_providers, (
+            "all providers must have a default in %s" % default_providers_filename
+        )
+
+
+def test_get_all_mock_packages(mock_packages):
+    """Get the mock packages once each too."""
+    for name in mock_packages.all_package_names():
+        mock_packages.get_pkg_class(name)
diff --git a/var/spack/repos/builtin.mock/packages/mpileaks/package.py b/var/spack/repos/builtin.mock/packages/mpileaks/package.py
index 2cb2e376a9..f720d82832 100644
--- a/var/spack/repos/builtin.mock/packages/mpileaks/package.py
+++ b/var/spack/repos/builtin.mock/packages/mpileaks/package.py
@@ -7,13 +7,15 @@ from spack.package import *
 
 
 class Mpileaks(Package):
+    """Mpileaks is a mock package that passes audits"""
+
     homepage = "http://www.llnl.gov"
     url = "http://www.llnl.gov/mpileaks-1.0.tar.gz"
 
-    version(1.0, "0123456789abcdef0123456789abcdef")
-    version(2.1, "0123456789abcdef0123456789abcdef")
-    version(2.2, "0123456789abcdef0123456789abcdef")
-    version(2.3, "0123456789abcdef0123456789abcdef")
+    version("2.3", sha256="2e34cc4505556d1c1f085758e26f2f8eea0972db9382f051b2dcfb1d7d9e1825")
+    version("2.2", sha256="2e34cc4505556d1c1f085758e26f2f8eea0972db9382f051b2dcfb1d7d9e1825")
+    version("2.1", sha256="2e34cc4505556d1c1f085758e26f2f8eea0972db9382f051b2dcfb1d7d9e1825")
+    version("1.0", sha256="2e34cc4505556d1c1f085758e26f2f8eea0972db9382f051b2dcfb1d7d9e1825")
 
     variant("debug", default=False, description="Debug variant")
     variant("opt", default=False, description="Optimized variant")
diff --git a/var/spack/repos/builtin.mock/packages/unconstrainable-conflict/package.py b/var/spack/repos/builtin.mock/packages/unconstrainable-conflict/package.py
index 8e17c75868..661bcf15e1 100644
--- a/var/spack/repos/builtin.mock/packages/unconstrainable-conflict/package.py
+++ b/var/spack/repos/builtin.mock/packages/unconstrainable-conflict/package.py
@@ -2,17 +2,16 @@
 # Spack Project Developers. See the top-level COPYRIGHT file for details.
 #
 # SPDX-License-Identifier: (Apache-2.0 OR MIT)
-
 from spack.package import *
 
 
 class UnconstrainableConflict(Package):
     """Package with a conflict whose trigger cannot constrain its constraint."""
 
-    homepage = "http://www.example.com"
-    url = "http://www.example.com/unconstrainable-conflict-1.0.tar.gz"
+    homepage = "http://www.realurl.com"
+    url = "http://www.realurl.com/unconstrainable-conflict-1.0.tar.gz"
 
-    version("1.0", "0123456789abcdef0123456789abcdef")
+    version("1.0", sha256="2e34cc4505556d1c1f085758e26f2f8eea0972db9382f051b2dcfb1d7d9e1825")
 
     # Two conflicts so there's always one that is not the current platform
     conflicts("target=x86_64", when="platform=darwin")