Change subprocess for inkscape version detection

Joshua Taillon · web-flow · commit ce0f5bd971ca · 2020-05-07T11:23:40.000-06:00
Use the `--no-gui` (`-z`) for inkscape to prevent depending on an X server for version detection
diff --git a/lib/matplotlib/__init__.py b/lib/matplotlib/__init__.py
@@ -330,7 +330,8 @@ def impl(args, regex, min_ver=None, ignore_exit_code=False):
         message = "Failed to find a Ghostscript installation"
         raise ExecutableNotFoundError(message)
     elif name == "inkscape":
-        info = impl(["inkscape", "-V"], "^Inkscape ([^ ]*)")
+        # use "no-gui" option for inkscape version detection:
+        info = impl(["inkscape", "-z", "-V"], "^Inkscape ([^ ]*)")
         if info and info.version >= "1.0":
             raise ExecutableNotFoundError(
                 f"You have Inkscape version {info.version} but Matplotlib "
