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-rw-r--r--sphinx/transforms/post_transforms/images.py15
1 files changed, 10 insertions, 5 deletions
diff --git a/sphinx/transforms/post_transforms/images.py b/sphinx/transforms/post_transforms/images.py
index f2cacac3c..949c09dde 100644
--- a/sphinx/transforms/post_transforms/images.py
+++ b/sphinx/transforms/post_transforms/images.py
@@ -11,7 +11,7 @@
import os
import re
from math import ceil
-from typing import Any, Dict, List, Tuple
+from typing import Any, Dict, List, Optional, Tuple
from docutils import nodes
@@ -175,6 +175,13 @@ class ImageConverter(BaseImageConverter):
"""
default_priority = 200
+ #: The converter is available or not. Will be filled at the first call of
+ #: the build. The result is shared in the same process.
+ #:
+ #: .. todo:: This should be refactored not to store the state without class
+ #: variable.
+ available = None # type: Optional[bool]
+
#: A conversion rules the image converter supports.
#: It is represented as a list of pair of source image format (mimetype) and
#: destination one::
@@ -187,16 +194,14 @@ class ImageConverter(BaseImageConverter):
conversion_rules = [] # type: List[Tuple[str, str]]
def __init__(self, *args: Any, **kwargs: Any) -> None:
- self.available = None # type: bool
- # the converter is available or not.
- # Will be checked at first conversion
super().__init__(*args, **kwargs)
def match(self, node: nodes.image) -> bool:
if not self.app.builder.supported_image_types:
return False
elif self.available is None:
- self.available = self.is_available()
+ # store the value to the class variable to share it during the build
+ self.__class__.available = self.is_available()
if not self.available:
return False