revlog: always use a Rust index for REVLOGv1 if rustext is present
We are about to change classes such as `rustext.AncestorsIterator` to
take a Rust index, hence we cannot have the option not to use the Rust
index.
Note: this can be refined depending on whether we want to keep this
option or not. We will have to make two versions of `AncestorsIterator`
and its sibling to support REVLOGV2 and CHANGELOGv2 anyway.
Meanwhile, this is the simplest change to make the tests pass.
--- a/mercurial/revlog.py Sun Oct 29 18:35:32 2023 +0100
+++ b/mercurial/revlog.py Fri Oct 27 23:29:29 2023 +0200
@@ -1683,7 +1683,10 @@
if self._nodemap_file is not None:
use_rust_index = True
else:
- use_rust_index = self.opener.options.get(b'rust.index')
+ # Using the CIndex is not longer possible, as the
+ # `AncestorsIterator` and `LazyAncestors` classes now require
+ # a Rust index for instantiation.
+ use_rust_index = True
self._parse_index = parse_index_v1
if self._format_version == REVLOGV0: