From 22539f443eccece2a94c41c7314efe3b976b23ef Mon Sep 17 00:00:00 2001
From: iarspider <iarspider@gmail.com>
Date: Thu, 25 Feb 2021 14:13:04 +0100
Subject: Fix recipe for evtgen 2.0; add variant for hepmc3 (#21814)

---
 var/spack/repos/builtin/packages/evtgen/package.py | 63 ++++++++++++++++++----
 1 file changed, 53 insertions(+), 10 deletions(-)

(limited to 'var')

diff --git a/var/spack/repos/builtin/packages/evtgen/package.py b/var/spack/repos/builtin/packages/evtgen/package.py
index bdc32196fb..b827a36fd9 100644
--- a/var/spack/repos/builtin/packages/evtgen/package.py
+++ b/var/spack/repos/builtin/packages/evtgen/package.py
@@ -6,37 +6,68 @@
 from spack import *
 
 
-class Evtgen(AutotoolsPackage):
+class Evtgen(CMakePackage):
     """ EvtGen is a Monte Carlo event generator that simulates
         the decays of heavy flavour particles, primarily B and D mesons. """
 
     homepage = "https://evtgen.hepforge.org/"
-    url      = "http://lcgpackages.web.cern.ch/lcgpackages/tarFiles/sources/MCGeneratorsTarFiles/evtgen-R01-07-00.tar.gz"
+    url      = "https://evtgen.hepforge.org/downloads?f=EvtGen-02.00.00.tar.gz"
 
     tags = ['hep']
 
     maintainers = ['vvolkl']
 
-    version('02-00-00', sha256='02372308e1261b8369d10538a3aa65fe60728ab343fcb64b224dac7313deb719')
-    version('01-07-00', sha256='2648f1e2be5f11568d589d2079f22f589c283a2960390bbdb8d9d7f71bc9c014', preferred=True)
+    version('02.00.00', sha256='02372308e1261b8369d10538a3aa65fe60728ab343fcb64b224dac7313deb719')
+    # switched to cmake in 02.00.00
+    version('01.07.00', sha256='2648f1e2be5f11568d589d2079f22f589c283a2960390bbdb8d9d7f71bc9c014', deprecated=True)
 
     variant('pythia8', default=True, description='Build with pythia8')
     variant('tauola', default=False, description='Build with tauola')
     variant('photos', default=False, description='Build with photos')
+    variant('hepmc3', default=False, description='Link with hepmc3 (instead of hepmc)')
 
-    patch("g2c.patch")
+    patch("g2c.patch", when='@01.07.00')
 
-    depends_on('hepmc@:2.99.99')
+    depends_on('hepmc', when='~hepmc3')
+    depends_on('hepmc3', when='+hepmc3')
     depends_on("pythia8", when="+pythia8")
-    depends_on("tauola", when="+tauola")
-    depends_on("photos", when="+photos")
+    depends_on("tauola~hepmc3", when="+tauola~hepmc3")
+    depends_on("photos~hepmc3", when="+photos~hepmc3")
+    depends_on("tauola+hepmc3", when="+tauola+hepmc3")
+    depends_on("photos+hepmc3", when="+photos+hepmc3")
 
     conflicts("^pythia8+evtgen", when="+pythia8",
               msg="Building pythia with evtgen bindings and "
               "evtgen with pythia bindings results in a circular dependency "
               "that cannot be resolved at the moment! "
               "Use evtgen+pythia8^pythia8~evtgen.")
+    conflicts('+hepmc3', when='@:01.99.99',
+              msg='hepmc3 support was added in 02.00.00')
 
+    def cmake_args(self):
+        args = []
+
+        args.append(self.define_from_variant('EVTGEN_PYTHIA', 'pythia8'))
+        args.append(self.define_from_variant('EVTGEN_TAUOLA', 'tauola'))
+        args.append(self.define_from_variant('EVTGEN_PHOTOS', 'photos'))
+        args.append(self.define_from_variant('EVTGEN_HEPMC3', 'hepmc3'))
+
+        return args
+
+    # Taken from AutotoolsPackage
+    def configure(self, spec, prefix):
+        """Runs configure with the arguments specified in
+        :py:meth:`~.AutotoolsPackage.configure_args`
+        and an appropriately set prefix.
+        """
+        options = getattr(self, 'configure_flag_args', [])
+        options += ['--prefix={0}'.format(prefix)]
+        options += self.configure_args()
+
+        with working_dir(self.build_directory, create=True):
+            inspect.getmodule(self).configure(*options)
+
+    @when('@:01.99.99')
     def configure_args(self):
         args = []
 
@@ -50,11 +81,23 @@ class Evtgen(AutotoolsPackage):
 
         return args
 
+    @when('@:01.99.99')
+    def cmake(self, spec, prefix):
+        pass
+
+    @when('@:01.99.99')
     def build(self, spec, prefix):
+        self.configure(spec, prefix)
         # avoid parallel compilation errors
         # due to libext_shared depending on lib_shared
-        make('lib_shared')
-        make('all')
+        with working_dir(self.build_directory):
+            make('lib_shared')
+            make('all')
+
+    @when('@:01.99.99')
+    def install(self, spec, prefix):
+        with working_dir(self.build_directory):
+            make('install')
 
     def setup_run_environment(self, env):
         env.set("EVTGEN", self.prefix.share)
-- 
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