fixup! Add options for the Julia binary and project path

Author: JamesWrigley

.github/workflows/tests.yml

@@ -60,7 +60,7 @@ jobs:
           CODECOV_TOKEN: ${{ secrets.CODECOV_TOKEN }}
 
   python:
-    name: Test Python (${{ matrix.pyversion }}, ${{ matrix.os }})
+    name: Test Python (${{ matrix.pyversion }}, ${{ matrix.os }}, ${{ matrix.jlinstaller }})
     runs-on: ${{ matrix.os }}
     strategy:
       fail-fast: false
@@ -75,6 +75,8 @@ jobs:
           jlinstaller: manual
     env:
       MANUAL_TEST_PROJECT: /tmp/juliacall-test-project
+      PYTHON_JULIACALL_THREADS: '2'
+      PYTHON_JULIACALL_HANDLE_SIGNALS: 'yes'
 
     steps:
       - uses: actions/checkout@v5
@@ -114,14 +116,18 @@ jobs:
           # exit-zero treats all errors as warnings. The GitHub editor is 127 chars wide
           uv run flake8 ./pysrc ./pytest --count --exit-zero --max-complexity=10 --max-line-length=127 --statistics
 
-      - name: Run tests
+      - name: Run tests (with JuliaPkg)
+        if: ${{ matrix.jlinstaller == '@JuliaPkg' }}
+        run: |
+          uv run pytest -s --nbval --cov=pysrc ./pytest/
+
+      - name: Run tests (without JuliaPkg)
+        if: ${{ matrix.jlinstaller == 'manual' }}
         run: |
           uv run pytest -s --nbval --cov=pysrc ./pytest/
         env:
-          PYTHON_JULIACALL_THREADS: '2'
-          PYTHON_JULIACALL_HANDLE_SIGNALS: 'yes'
-          PYTHON_JULIACALL_EXE: "${{ steps.setup_julia.outputs.julia_bindir }}${{ matrix.jlinstaller == 'manual' && '/julia' || '' }}"
-          PYTHON_JULIACALL_PROJECT: "${{ matrix.jlinstaller == 'manual' && env.MANUAL_TEST_PROJECT || '' }}"
+          PYTHON_JULIACALL_EXE: "${{ steps.setup_julia.outputs.julia_bindir }}/julia"
+          PYTHON_JULIACALL_PROJECT: ${{ env.MANUAL_TEST_PROJECT }}
 
       - name: Upload coverage to Codecov
         uses: codecov/codecov-action@v5

pysrc/juliacall/__init__.py

@@ -147,15 +147,15 @@ def args_from_config(config):
     CONFIG['opt_handle_signals'] = choice('handle_signals', ['yes', 'no'])[0]
     CONFIG['opt_startup_file'] = choice('startup_file', ['yes', 'no'])[0]
     CONFIG['opt_heap_size_hint'] = option('heap_size_hint')[0]
-    CONFIG['project'] = path_option('project', default="")[0]
+    CONFIG['project'] = path_option('project', default="", check_exists=True)[0]
     CONFIG['exe'] = path_option('exe', default="", check_exists=True)[0]
 
     # Stop if we already initialised
     if CONFIG['inited']:
         return
 
-    have_exe = len(CONFIG['exe']) > 0
-    have_project = len(CONFIG['project']) > 0
+    have_exe = CONFIG['exe'] is not None
+    have_project = CONFIG['project']) is not None
     if not have_exe and not have_project:
         # we don't import this at the top level because it is not required when
         # juliacall is loaded by PythonCall and won't be available, or if both