mg7 launch: translate madevent run_card names in "set" (cuts, beams, PDFs, scale codes)

docs/source/madevent_to_mg7.rst

@@ -17,6 +17,24 @@ and ``use_syst``. The shortcuts ``set lhc``, ``set lep``, ``set fixed_scale``,
 ``set no_parton_cut`` and ``set dynamical_scale_choice HT/n`` work as before, and so does
 ``set iseed``. MadEvent draws a random seed for ``iseed = 0``. MG7 does the same for
 ``seed = -1`` and treats ``0`` as an ordinary fixed seed, so ``set iseed 0`` is translated.
+
+The cut names of the `Cuts`_ table are translated as well, so ``set mmll 200`` sets
+``lepton-sfos_pair_mass.min`` and ``set ptj1min 50`` sets ``jet_1-pt.min``. As in
+``run_card.dat``, a minimum of zero or a negative maximum removes that bound. A cut on the
+``parton`` or ``alllepton`` group also adds the group to ``[multiparticles]`` if it is not
+there yet. The per-pdg cuts are written as in ``run_card.dat``, for example
+``set pt_min_pdg {6: 100}``, and put on a group ``pdg6 = [6, -6]``. ``ptheavy`` is not
+translated, because it needs a group of your own.
+
+The beam and PDF settings ``ebeam1``, ``ebeam2`` (and the shortcut ``set ebeam``),
+``lpp1``, ``lpp2``, ``pdlabel``, ``pdlabel1``, ``pdlabel2``, ``lhaid``, ``fixed_fac_scale``,
+``fixed_fac_scale1``, ``fixed_fac_scale2`` and ``maxjetflavor`` are translated as in the tables
+below, and so are the numbers of ``dynamical_scale_choice`` (``set dynamical_scale_choice 3``)
+and ``sde_strategy``. MG7 has one energy, one PDF and one lepton flag for both beams, so the
+two values of a pair are combined: ``set ebeam1 7000`` followed by ``set ebeam2 4000`` runs at
+the same :math:`\sqrt{s}` in the centre-of-mass frame. What cannot be represented this way is
+reported once the launch question closes.
+
 All other settings must use their new names.
 
 Beams and PDFs

madgraph/iolibs/template_files/mg7/launch.py

@@ -3523,6 +3523,15 @@ def init_run(self, cards):
                 self.run_card.allow_scan = True
             return getattr(self, "run_set", out)
 
+        def check_card_consistency(self):
+            super().check_card_consistency()
+            # madevent settings given per beam ("set ebeam1 ...") that the
+            # one-energy, one-PDF mg7 card could not follow: said once, at
+            # the end, so "set ebeam1 X" then "set ebeam2 X" stays quiet
+            if isinstance(getattr(self, "run_card", None), RunCardMG7):
+                for text in self.run_card.lo_set_warnings():
+                    logger.warning(text)
+
         def do_set(self, line, *args, **kwargs):
             # madevent-style shortcuts (lhc/lep/fixed_scale/no_parton_cut), cut
             # editing, energy units and arithmetic/mass expressions on the TOML
@@ -3589,6 +3598,55 @@ def do_set(self, line, *args, **kwargs):
                         self.modified_card.add("run")
                         return
 
+                    # legacy madevent cut names ("set ptj 20", "set mmll 200",
+                    # "set etaj -1", ...) -> the [cuts] entry the LO->MG7
+                    # run_card conversion maps them to (_LO_CUT_MAP), with the
+                    # same "no cut" sentinels (minimum <= 0, maximum < 0).
+                    if rest and nlow in run_card._LO_CUT_MAP:
+                        try:
+                            cut, bound, val = run_card.set_lo_cut(
+                                nlow, run_card.evaluate(rest, masses))
+                        except (_banner_mod.InvalidCmd, TypeError, ValueError):
+                            logger.warning("ignoring 'set %s %s': not a number", nlow, rest)
+                            return
+                        if val is None:
+                            logger.info("set %s (mg7 cut %s.%s) of the run_card.toml: "
+                                        "no cut", nlow, cut, bound)
+                        else:
+                            logger.info("set %s (mg7 cut %s.%s) of the run_card.toml to %s",
+                                        nlow, cut, bound, val)
+                        self.modified_card.add("run")
+                        return
+
+                    # madevent parameters that are not a plain rename: the
+                    # value is translated ("set dynamical_scale_choice 3") or
+                    # several of them make one mg7 entry (ebeam1 + ebeam2 ->
+                    # beam.e_cm). mg7 values ("set sde_strategy denominators")
+                    # come back as None and go on to the generic editor.
+                    if rest and nlow in run_card._LO_SET_PARAMS:
+                        try:
+                            done = run_card.set_lo_param(nlow, rest, masses)
+                        except (_banner_mod.InvalidCmd, TypeError, ValueError) as error:
+                            logger.warning("ignoring 'set %s %s': %s", nlow, rest, error)
+                            return
+                        if done is not None:
+                            changes, warnings = done
+                            for key, val in changes.items():
+                                if val is None:
+                                    logger.info("set %s: removed %s from the run_card.toml",
+                                                nlow, key)
+                                else:
+                                    logger.info("set %s (mg7 %s) of the run_card.toml to %s",
+                                                nlow, key, val)
+                            for text in warnings:
+                                logger.warning(text)
+                            if changes:
+                                self.modified_card.add("run")
+                            elif not warnings:
+                                logger.info("set %s %s: nothing to change in the run_card.toml",
+                                            nlow, rest)
+                            return
+
                     # 'iseed' is the madevent spelling of the mg7 run.seed,
                     # but the two disagree on how to ask for a random seed:
                     # madevent uses 0, mg7 uses -1 (0 being a perfectly good