add glop_proto_solver; split bazel targets for proto_solver

ortools/linear_solver/python/solve_model.py

@@ -0,0 +1,57 @@
+# Copyright 2010-2022 Google LLC
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#     http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+
+"""Minimal solver python binary."""
+
+from collections.abc import Sequence
+
+from absl import app
+from absl import flags
+
+from ortools.linear_solver.python import model_builder
+
+_INPUT = flags.DEFINE_string("input", "", "Input file to load and solve.")
+_PARAMS = flags.DEFINE_string("params", "", "Solver parameters in string format.")
+_SOLVER = flags.DEFINE_string("solver", "sat", "Solver type to solve the model with.")
+
+
+def main(argv: Sequence[str]) -> None:
+    if len(argv) > 1:
+        raise app.UsageError("Too many command-line arguments.")
+
+    model = model_builder.ModelBuilder()
+
+    # Load MPS file.
+    if not model.import_from_mps_file(_INPUT.value):
+        print(f"Cannot import MPS file: '{_INPUT.value}'")
+        return
+
+    # Create solver.
+    solver = model_builder.ModelSolver(_SOLVER.value)
+    if not solver.solver_is_supported():
+        print(f"Cannot create solver with name '{_SOLVER.value}'")
+        return
+
+    # Set parameters.
+    if _PARAMS.value:
+        solver.set_solver_specific_parameters(_PARAMS.value)
+
+    # Enable the output of the solver.
+    solver.enable_output(True)
+
+    # And solve.
+    solver.solve(model)
+
+
+if __name__ == "__main__":
+    app.run(main)