Fix use of downloaded fonts for pptx build type

imgkit runs in /tmp, so we need to either copy the fonts there for resolve all the paths

Set log-level on imgkit to warn because missing font files is a warning, not an error

bakery-src/scripts/pptify_book.py

@@ -474,15 +474,13 @@ def auto_crop_img(img, bg=None):
 # due to some kind of rate limiting. If this becomes a problem, a possible
 # workaround is to download the font css once and update the references in the
 # pdf css so that the font is read from the local copy
-def xhtml_to_img(elem, *, css=[], resource_dir=None):
+def xhtml_to_img(elem, *, css=[]):
     options = {
         "format": "png",
-        "log-level": "error",
+        "log-level": "warn",
         "quality": "100",
+        "enable-local-file-access": "",
     }
-    if resource_dir is not None:
-        options["enable-local-file-access"] = ""
-        options["allow"] = resource_dir
     with BytesIO() as img_file:
         serialized = etree.tostring(elem, encoding="unicode")
         assert serialized, "Cannot convert empty element"
@@ -511,7 +509,7 @@ def element_to_image(
         rel_p = resource.get(attr)
         abs_p = (doc_dir / rel_p).resolve()
         resource.set(attr, str(abs_p))
-    img = xhtml_to_img(elem, resource_dir=resource_dir, css=css)
+    img = xhtml_to_img(elem, css=css)
     img = auto_crop_img(img)
     return img
 

bakery-src/tests/test_bakery_scripts.py

@@ -4598,24 +4598,24 @@ def test_ppt_image_transforms(mocker):
         css=[],
         options={
             "format": "png",
-            "log-level": "error",
+            "log-level": "warn",
             "quality": "100",
+            "enable-local-file-access": "",
         },
     )
     assert result.size == img.size
 
     imgkit_from_string_stub.reset_mock()
-    result = pptify_book.xhtml_to_img(xhtml, resource_dir="test")
+    result = pptify_book.xhtml_to_img(xhtml)
     imgkit_from_string_stub.assert_called_once_with(
         etree.tostring(xhtml, encoding="unicode"),
         None,
         css=[],
         options={
-            "allow": "test",
-            "enable-local-file-access": "",
             "format": "png",
-            "log-level": "error",
+            "log-level": "warn",
             "quality": "100",
+            "enable-local-file-access": "",
         },
     )
     assert result.size == img.size
@@ -4652,11 +4652,10 @@ def get_doc_dir(self):
         None,
         css=[],
         options={
-            "allow": resource_dir,
-            "enable-local-file-access": "",
             "format": "png",
-            "log-level": "error",
+            "log-level": "warn",
             "quality": "100",
+            "enable-local-file-access": "",
         },
     )
     mocker.stopall()

dockerfiles/steps/step-pptx.bash

@@ -2,6 +2,7 @@ parse_book_dir
 
 set -Eeuo pipefail
 
+cp -R "$IO_BAKED/downloaded-fonts" "/tmp"
 mathml2png_rpc start
 for book in "$IO_LINKED/"*.xhtml; do
     lang=en