From 0a8dfb73dacdcd4f1c14d64213e95a513e04bbc6 Mon Sep 17 00:00:00 2001
From: Axel Kohlmeyer <akohlmey@gmail.com>
Date: Wed, 5 Oct 2022 20:14:10 -0400
Subject: [PATCH] make lammps_config_has_package() accessible in Python module

---
 python/lammps/core.py                  | 16 ++++++++++++++++
 unittest/python/python-capabilities.py |  7 +++++++
 2 files changed, 23 insertions(+)

diff --git a/python/lammps/core.py b/python/lammps/core.py
index 074e579d13..3d0dc21e80 100644
--- a/python/lammps/core.py
+++ b/python/lammps/core.py
@@ -265,6 +265,7 @@ class lammps(object):
 
     self.lib.lammps_encode_image_flags.restype = self.c_imageint
 
+    self.lib.lammps_config_has_package.argtypes = [c_char_p]
     self.lib.lammps_config_package_name.argtypes = [c_int, c_char_p, c_int]
     self.lib.lammps_config_accelerator.argtypes = [c_char_p, c_char_p, c_char_p]
 
@@ -1627,6 +1628,21 @@ class lammps(object):
 
   # -------------------------------------------------------------------------
 
+  def has_package(self, name):
+    """ Report if the named package has been enabled in the LAMMPS shared library.
+
+    This is a wrapper around the :cpp:func:`lammps_config_has_package`
+    function of the library interface.
+
+    :param name: name of the package
+    :type  name: string
+
+    :return: state of package availability
+    :rtype: bool
+    """
+    return self.lib.lammps_config_has_package(name.encode()) != 0
+  # -------------------------------------------------------------------------
+
   @property
   def accelerator_config(self):
     """ Return table with available accelerator configuration settings.
diff --git a/unittest/python/python-capabilities.py b/unittest/python/python-capabilities.py
index 3ac66ebdc6..be38a9f090 100644
--- a/unittest/python/python-capabilities.py
+++ b/unittest/python/python-capabilities.py
@@ -60,6 +60,13 @@ class PythonCapabilities(unittest.TestCase):
         for pkg in selected_packages:
             self.assertIn(pkg, installed_packages)
 
+    def test_has_package(self):
+        selected_packages = [key[4:] for key in self.cmake_cache.keys() if not key.startswith('PKG_CONFIG') and key.startswith('PKG_') and self.cmake_cache[key]]
+        self.assertFalse(self.lmp.has_package('XXXXXX'))
+
+        for pkg in selected_packages:
+            self.assertTrue(self.lmp.has_package(pkg))
+
     def test_has_style(self):
         self.assertTrue(self.lmp.has_style('pair', 'lj/cut'))
         self.assertFalse(self.lmp.has_style('pair', 'lennard_jones'))