FairLogger: new package (#14427) (#14427)

* Fixed date on first copyright header.
* Rename dev version to develop
* Improve filter_file calling
* Be explicit for +pretty / ~pretty

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

+# Copyright 2013-2020 Lawrence Livermore National Security, LLC and other
+#   Spack Project Developers. See the top-level COPYRIGHT file for details.
+# Copyright 2020 GSI Helmholtz Centre for Heavy Ion Research GmbH,
+#   Darmstadt, Germany
+#
+# SPDX-License-Identifier: (Apache-2.0 OR MIT)
+
+from spack import *
+
+
+class Fairlogger(CMakePackage):
+    """Lightweight and fast C++ Logging Library"""
+
+    homepage = 'https://github.com/FairRootGroup/FairLogger'
+    url = "https://github.com/FairRootGroup/FairLogger/archive/v1.2.0.tar.gz"
+    git = 'https://github.com/FairRootGroup/FairLogger.git'
+    maintainers = ['dennisklein', 'ChristianTackeGSI']
+    # generator = 'Ninja'
+
+    version('develop', branch='dev')
+    version('1.6.1', sha256='3894580f4c398d724ba408e410e50f70c9f452e8cfaf7c3ff8118c08df28eaa8')
+    version('1.6.0', sha256='721e8cadfceb2f63014c2a727e098babc6deba653baab8866445a772385d0f5b')
+    version('1.5.0', sha256='8e74e0b1e50ee86f4fca87a44c6b393740b32099ac3880046bf252c31c58dd42')
+    version('1.4.0', sha256='75457e86984cc03ce87d6ad37adc5aab1910cabd39a9bbe5fb21ce2475a91138')
+    version('1.3.0', sha256='5cedea2773f7091d69aae9fd8f724e6e47929ee3784acdd295945a848eb36b93')
+    version('1.2.0', sha256='bc0e049cf84ceb308132d8679e7f22fcdca5561dda314d5233d0d5fe2b0f8c62')
+    version('1.1.0', sha256='e185e5bd07df648224f85e765d18579fae0de54adaab9a194335e3ad6d3d29f7')
+    version('1.0.6', sha256='2fc266a6e494adda40837be406aef8d9838f385ffd64fbfafb1164833906b4e0')
+
+    variant('build_type', default='RelWithDebInfo',
+            values=('Debug', 'Release', 'RelWithDebInfo'),
+            multi=False,
+            description='CMake build type')
+    variant('cxxstd', default='11',
+            values=('11', '14', '17'),
+            multi=False,
+            description='Use the specified C++ standard when building.')
+    variant('pretty',
+            default=False,
+            description='Use BOOST_PRETTY_FUNCTION macro.')
+    conflicts('+pretty', when='@:1.3.99')
+
+    depends_on('cmake@3.9.4:', type='build')
+    depends_on('git', type='build', when='@develop')
+    depends_on('boost', when='+pretty')
+    depends_on('fmt@5.3.0:', when='@1.6.0:')
+
+    def patch(self):
+        """FairLogger gets its version number from git.
+           But the tarball doesn't have that information, so
+           we patch the spack version into CMakeLists.txt"""
+        if not self.spec.satisfies("@develop"):
+            filter_file(r'(get_git_version\(.*)\)',
+                        r'\1 DEFAULT_VERSION %s)' % self.spec.version,
+                        'CMakeLists.txt')
+
+    def cmake_args(self):
+        cxxstd = self.spec.variants['cxxstd'].value
+        args = []
+        args.append('-DCMAKE_CXX_STANDARD=%s' % cxxstd)
+        args.append('-DUSE_BOOST_PRETTY_FUNCTION=%s' %
+                    ('ON' if '+pretty' in self.spec else 'OFF'))
+        if self.spec.satisfies('@1.6:'):
+            args.append('-DUSE_EXTERNAL_FMT=ON')
+        return args