32650: Creating feature dvipng

src/sage/features/dvipng.py

@@ -0,0 +1,36 @@
+# -*- coding: utf-8 -*-
+r"""
+Check for dvipng
+"""
+# ****************************************************************************
+#       Copyright (C) 2021 Sebastien Labbe <slabqc@gmail.com>
+#
+# This program is free software: you can redistribute it and/or modify
+# it under the terms of the GNU General Public License as published by
+# the Free Software Foundation, either version 2 of the License, or
+# (at your option) any later version.
+#                  https://www.gnu.org/licenses/
+# ****************************************************************************
+
+from . import Executable
+
+class dvipng(Executable):
+    r"""
+    A :class:`sage.features.Feature` describing the presence of ``dvipng``
+
+    EXAMPLES::
+
+        sage: from sage.features.dvipng import dvipng
+        sage: dvipng().is_present()             # optional: dvipng
+        FeatureTestResult('dvipng', True)
+    """
+    def __init__(self):
+        r"""
+        TESTS::
+
+            sage: from sage.features.dvipng import dvipng
+            sage: isinstance(dvipng(), dvipng)
+            True
+        """
+        Executable.__init__(self, "dvipng", executable="dvipng",
+                            url="https://savannah.nongnu.org/projects/dvipng/")