fossil: New package (#30311)

* fossil: new package

* fossil: Format code

var/spack/repos/builtin/packages/fossil/package.py

@@ -0,0 +1,25 @@
+# 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)
+
+from spack import *
+
+
+class Fossil(AutotoolsPackage):
+    """Fossil.
+
+    Fossil is a simple, high-reliability, distributed software
+    configuration management system.
+    """
+
+    homepage = "https://fossil-scm.org/"
+    url      = "https://github.com/drdcd/fossil-scm"
+
+    maintainers = ['eschnett']
+
+    version('2.18',
+            url="https://fossil-scm.org/home/tarball/84f25d7eb10c0714109d69bb2809abfa8b4b5c3d73b151a5b10df724dacd46d8/fossil-src-2.18.tar.gz",
+            sha256='300c1d5cdd6224ec6e8c88ab3f38d50f80e4071b503731b75bd61274cf310733')
+
+    depends_on('openssl')