solvers: silence version output of highs

Author: maurerle

linopy/solvers.py

@@ -460,6 +460,7 @@ def solve_problem_from_file(
 
         # Use HiGHS to parse the problem file and find the set of variable names, needed to parse solution
         h = highspy.Highs()
+        h.silent()
         h.readModel(path_to_string(problem_fn))
         variables = {v.name for v in h.getVariables()}
 
@@ -804,6 +805,14 @@ def solve_problem_from_file(
 
         problem_fn_ = path_to_string(problem_fn)
         h = highspy.Highs()
+
+        if log_fn is not None:
+            self.solver_options["log_file"] = path_to_string(log_fn)
+            logger.info(f"Log file at {self.solver_options['log_file']}")
+
+        for k, v in self.solver_options.items():
+            h.setOptionValue(k, v)
+
         h.readModel(problem_fn_)
 
         return self._solve(
@@ -877,13 +886,6 @@ def _solve(
             highspy.HighsModelStatus.kUnknown: TerminationCondition.unknown,
         }
 
-        if log_fn is not None:
-            self.solver_options["log_file"] = path_to_string(log_fn)
-            logger.info(f"Log file at {self.solver_options['log_file']}")
-
-        for k, v in self.solver_options.items():
-            h.setOptionValue(k, v)
-
         if warmstart_fn is not None and warmstart_fn.suffix == ".sol":
             h.readSolution(path_to_string(warmstart_fn), 0)
         elif warmstart_fn: