[WIP] Add COPT support for Pyomo

.github/workflows/test_branches.yml

@@ -573,6 +573,13 @@ jobs:
         $PYTHON_EXE -m pip install --cache-dir cache/pip highspy \
             || echo "WARNING: highspy is not available"
 
+    - name: Install COPT
+      if: ${{ ! matrix.slim }}
+      shell: bash
+      run: |
+        $PYTHON_EXE -m pip install --cache-dir cache/pip coptpy \
+            || echo "WARNING: coptpy is not available"
+
     - name: Set up coverage tracking
       run: |
         if test "${{matrix.TARGET}}" == win; then

.github/workflows/test_pr_and_main.yml

@@ -603,6 +603,13 @@ jobs:
         $PYTHON_EXE -m pip install --cache-dir cache/pip highspy \
             || echo "WARNING: highspy is not available"
 
+    - name: Install COPT
+      if: ${{ ! matrix.slim }}
+      shell: bash
+      run: |
+        $PYTHON_EXE -m pip install --cache-dir cache/pip coptpy \
+            || echo "WARNING: coptpy is not available"
+
     - name: Set up coverage tracking
       run: |
         if test "${{matrix.TARGET}}" == win; then

pyomo/contrib/appsi/base.py

@@ -1654,15 +1654,15 @@ def license_is_valid(self) -> bool:
 
     @property
     def options(self):
-        for solver_name in ['gurobi', 'ipopt', 'cplex', 'cbc', 'highs']:
+        for solver_name in ['gurobi', 'ipopt', 'cplex', 'cbc', 'highs', 'copt']:
             if hasattr(self, solver_name + '_options'):
                 return getattr(self, solver_name + '_options')
         raise NotImplementedError('Could not find the correct options')
 
     @options.setter
     def options(self, val):
         found = False
-        for solver_name in ['gurobi', 'ipopt', 'cplex', 'cbc', 'highs']:
+        for solver_name in ['gurobi', 'ipopt', 'cplex', 'cbc', 'highs', 'copt']:
             if hasattr(self, solver_name + '_options'):
                 setattr(self, solver_name + '_options', val)
                 found = True

pyomo/contrib/appsi/plugins.py

@@ -1,6 +1,6 @@
 from pyomo.common.extensions import ExtensionBuilderFactory
 from .base import SolverFactory
-from .solvers import Gurobi, Ipopt, Cbc, Cplex, Highs
+from .solvers import Gurobi, Ipopt, Cbc, Cplex, Highs, Copt
 from .build import AppsiBuilder
 
 
@@ -21,3 +21,6 @@ def load():
     SolverFactory.register(
         name='appsi_highs', doc='Automated persistent interface to Highs'
     )(Highs)
+    SolverFactory.register(
+        name='appsi_copt', doc='Automated persistent interface to COPT'
+    )(Copt)

pyomo/contrib/appsi/solvers/__init__.py

@@ -3,3 +3,4 @@
 from .cbc import Cbc
 from .cplex import Cplex
 from .highs import Highs
+from .copt import Copt, CoptResults