Rework conda config in GHA workflows; relax test baselines

.github/workflows/test_branches.yml

@@ -99,7 +99,7 @@ jobs:
           PYENV: pip
 
         - os: windows-latest
-          python: 3.12
+          python: 3.14
           test_docs: 1
           TARGET: win
           PYENV: conda
@@ -236,8 +236,11 @@ jobs:
       if: matrix.PYENV == 'conda'
       uses: conda-incubator/setup-miniconda@v3
       with:
+        conda-remove-defaults: true
         auto-update-conda: false
         python-version: ${{ matrix.python }}
+        channels: conda-forge, gurobi, ibmdecisionoptimization, fico-xpress
+        use-mamba: true
 
     # This is necessary for qt (UI) tests; the package utilized here does not
     # have support for OSX.
@@ -317,27 +320,7 @@ jobs:
       run: |
         # Set up environment
         conda config --set always_yes yes
-        conda config --set auto_update_conda false
         conda config --set channel_priority strict
-        conda config --remove channels defaults
-        conda config --append channels nodefaults
-        conda config --append channels conda-forge
-        # Try to install mamba
-        CONDA_VER=$(conda --version | cut -d\  -f2)
-        if test 23.10 = "`echo -e "23.10\n$CONDA_VER" | sort -V | tail -1`"; then
-            # Note: removed '--update-deps' on 2025-02-28 to work around
-            #       broken libffi(?)
-            conda install -q -y -n base conda-libmamba-solver \
-                || MAMBA_FAILED=1
-            if test -z "$MAMBA_FAILED"; then
-                echo "*** Activating the mamba environment solver ***"
-                conda config --set solver libmamba
-            fi
-        fi
-        # Add the rest of the channels
-        conda config --append channels gurobi
-        conda config --append channels ibmdecisionoptimization
-        conda config --append channels fico-xpress
         # Print environment info
         echo "*** CONDA environment: ***"
         conda info
@@ -375,10 +358,8 @@ jobs:
         echo ""
         echo "*** Install Pyomo dependencies ***"
         # For windows, cannot use newer setuptools because of APPSI compilation issues
-        # There seems to be some specific problem with platformdirs 4.5.0
-        # on win 3.13/3.14 as of 2025-10-23
         if test "${{matrix.TARGET}}" == 'win'; then
-            CONDA_DEPENDENCIES="$CONDA_DEPENDENCIES setuptools<74.0.0 platformdirs!=4.5.0"
+            CONDA_DEPENDENCIES="$CONDA_DEPENDENCIES setuptools<74.0.0"
         fi
         # Note: this will fail the build if any installation fails (or
         # possibly if it outputs messages to stderr)

.github/workflows/test_pr_and_main.yml

@@ -93,8 +93,7 @@ jobs:
       fail-fast: false
       matrix:
         os: [ubuntu-latest, macos-latest, windows-latest]
-        # FIXME: pinning to 3.14.0 until 3.14.1 is removed from runner tool cache
-        python: [ '3.10', 3.11, 3.12, 3.13, 3.14.0 ]
+        python: [ '3.10', 3.11, 3.12, 3.13, 3.14 ]
         other: [""]
         category: [""]
 
@@ -289,8 +288,11 @@ jobs:
       if: matrix.PYENV == 'conda'
       uses: conda-incubator/setup-miniconda@v3
       with:
+        conda-remove-defaults: true
         auto-update-conda: false
         python-version: ${{ matrix.python }}
+        channels: conda-forge, gurobi, ibmdecisionoptimization, fico-xpress
+        use-mamba: true
 
     # This is necessary for qt (UI) tests; the package utilized here does not
     # have support for OSX.
@@ -370,27 +372,7 @@ jobs:
       run: |
         # Set up environment
         conda config --set always_yes yes
-        conda config --set auto_update_conda false
         conda config --set channel_priority strict
-        conda config --remove channels defaults
-        conda config --append channels nodefaults
-        conda config --append channels conda-forge
-        # Try to install mamba
-        CONDA_VER=$(conda --version | cut -d\  -f2)
-        if test 23.10 = "`echo -e "23.10\n$CONDA_VER" | sort -V | tail -1`"; then
-            # Note: removed '--update-deps' on 2025-02-28 to work around
-            #       broken libffi(?)
-            conda install -q -y -n base conda-libmamba-solver \
-                || MAMBA_FAILED=1
-            if test -z "$MAMBA_FAILED"; then
-                echo "*** Activating the mamba environment solver ***"
-                conda config --set solver libmamba
-            fi
-        fi
-        # Add the rest of the channels
-        conda config --append channels gurobi
-        conda config --append channels ibmdecisionoptimization
-        conda config --append channels fico-xpress
         # Print environment info
         echo "*** CONDA environment: ***"
         conda info
@@ -428,10 +410,8 @@ jobs:
         echo ""
         echo "*** Install Pyomo dependencies ***"
         # For windows, cannot use newer setuptools because of APPSI compilation issues
-        # There seems to be some specific problem with platformdirs 4.5.0
-        # on win 3.13/3.14 as of 2025-10-23
         if test "${{matrix.TARGET}}" == 'win'; then
-            CONDA_DEPENDENCIES="$CONDA_DEPENDENCIES setuptools<74.0.0 platformdirs!=4.5.0"
+            CONDA_DEPENDENCIES="$CONDA_DEPENDENCIES setuptools<74.0.0"
         fi
         # Note: this will fail the build if any installation fails (or
         # possibly if it outputs messages to stderr)

.github/workflows/typos.toml

@@ -75,4 +75,10 @@ gam = "gam"
 ond = "ond"
 # GAMS_writer
 PATHC = "PATHC"
+# Bimap - tries to correct to Bitmap
+Bimap = "Bimap"
+# cmo - tries to correct to com
+cmo = "cmo"
+# Substituters
+Substituters = "Substituters"
 # AS NEEDED: Add More Words Below

pyomo/contrib/piecewise/tests/test_nonlinear_to_pwl.py

@@ -602,7 +602,7 @@ def test_linear_model_tree_uniform(self):
             # pretty close to m.x, but we're a bit off because we don't have 0
             # as a breakpoint.
             0.9833360108369479 * m.x + 0.16663989163052034,
-            places=7,
+            places=6,
         )
 
     def test_linear_model_tree_random(self):
@@ -657,7 +657,7 @@ def test_linear_model_tree_random_auto_depth_tree(self):
             pwlf._simplices,
             [(0, 1), (1, 2), (2, 3), (3, 4), (4, 5), (5, 6), (6, 7), (7, 8)],
         )
-        self.assertEqual(
+        self.assertStructuredAlmostEqual(
             pwlf._points,
             [
                 (-10,),
@@ -670,6 +670,7 @@ def test_linear_model_tree_random_auto_depth_tree(self):
                 (2.15597,),
                 (10,),
             ],
+            places=4,
         )
         self.assertEqual(len(pwlf._linear_functions), 8)
         for i in range(3):
@@ -680,7 +681,7 @@ def test_linear_model_tree_random_auto_depth_tree(self):
             # pretty close to - m.x, but we're a bit off because we don't have 0
             # as a breakpoint.
             -0.9851979299618323 * m.x + 0.12006477080409184,
-            places=7,
+            places=6,
         )
         for i in range(4, 8):
             assertExpressionsEqual(self, pwlf._linear_functions[i](m.x), m.x)