Fix #6900: sphinx-build: -D option does not considers 0 and 1 as a boolean value

1 files changed, 6 insertions, 0 deletions

diff --git a/sphinx/config.py b/sphinx/config.py
index cbe04b3ee..ddee765b7 100644
--- a/sphinx/config.py
+++ b/sphinx/config.py
@@ -217,6 +217,12 @@ class Config:
             defvalue = self.values[name][0]
             if self.values[name][2] == Any:
                 return value
+            elif type(defvalue) is bool or self.values[name][2] == [bool]:
+                if value == '0':
+                    # given falsy string from command line option
+                    return False
+                else:
+                    return bool(value)
             elif isinstance(defvalue, dict):
                 raise ValueError(__('cannot override dictionary config setting %r, '
                                     'ignoring (use %r to set individual elements)') %