Add sio and add it as possible dependency for podio (#19875)

Newest podio can use SIO as backend

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

@@ -28,6 +28,9 @@ class Podio(CMakePackage):
             description='The build type to build',
             values=('Debug', 'Release'))
 
+    variant('sio', default=False,
+            description='Build the SIO I/O backend')
+
     # cpack config throws an error on some systems
     patch('cpack.patch', when="@:0.10.0")
     patch('dictloading.patch', when="@0.10.0")
@@ -38,9 +41,15 @@ class Podio(CMakePackage):
     depends_on('python', type=('build', 'run'))
     depends_on('py-pyyaml', type=('build', 'run'))
     depends_on('py-jinja2@2.10.1:', type=('build', 'run'), when='@0.12.0:')
+    depends_on('sio', type=('build', 'run'), when='+sio')
+
+    conflicts('+sio', when='@:0.12', msg='sio support requires at least podio@0.13')
 
     def cmake_args(self):
-        args = ['-DBUILD_TESTING=%s' % self.run_tests, ]
+        args = [
+            self.define('BUILD_TESTING', self.run_tests),
+            self.define_from_variants('ENABLE_SIO', 'sio')
+        ]
         return args
 
     def url_for_version(self, version):

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

@@ -0,0 +1,55 @@
+# Copyright 2013-2020 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 Sio(CMakePackage):
+    """SIO is a persistency solution for reading and writing binary data in SIO
+    structures called record and block. SIO has originally been implemented as
+    persistency layer for LCIO.
+    """
+
+    url      = "https://github.com/iLCSoft/SIO/archive/v00-00-02.tar.gz"
+    homepage = "https://github.com/iLCSoft/SIO"
+    git      = "https://github.com/iLCSoft/SIO.git"
+
+    maintainers = ['vvolkl', 'tmadlener']
+
+    version('master', branch='master')
+    version('0.0.3', sha256='4c8b9c08480fb53cd10abb0e1260071a8c3f68d06a8acfd373f6560a916155cc')
+    version('0.0.2', sha256='e4cd2aeaeaa23c1da2c20c5c08a9b72a31b16b7a8f5aa6d480dcd561ef667657')
+
+    def url_for_version(self, version):
+        """Translate version numbers to ilcsoft conventions.
+        in spack, the convention is: 0.1 (or 0.1.0) 0.1.1, 0.2, 0.2.1 ...
+        in ilcsoft, releases are dashed and padded with a leading zero
+        the patch version is omitted when 0
+        so for example v01-12-01, v01-12 ...
+
+        :param self: spack package class that has a url
+        :type self: class: `spack.PackageBase`
+        :param version: version
+        :type param: str
+        """
+        base_url = self.url.rsplit('/', 1)[0]
+
+        if len(version) == 1:
+            major = version[0]
+            minor, patch = 0, 0
+        elif len(version) == 2:
+            major, minor = version
+            patch = 0
+        else:
+            major, minor, patch = version
+
+        # By now the data is normalized enough to handle it easily depending
+        # on the value of the patch version
+        if patch == 0:
+            version_str = 'v%02d-%02d.tar.gz' % (major, minor)
+        else:
+            version_str = 'v%02d-%02d-%02d.tar.gz' % (major, minor, patch)
+
+        return base_url + '/' + version_str