--- a/mercurial/localrepo.py Thu Oct 14 22:35:46 2021 -0700
+++ b/mercurial/localrepo.py Fri Oct 15 01:27:39 2021 +0200
@@ -1174,6 +1174,32 @@
if slow_path == b'abort':
raise error.Abort(msg, hint=hint)
options[b'persistent-nodemap'] = True
+ if requirementsmod.DIRSTATE_V2_REQUIREMENT in requirements:
+ slow_path = ui.config(b'storage', b'dirstate-v2.slow-path')
+ if slow_path not in (b'allow', b'warn', b'abort'):
+ default = ui.config_default(b'storage', b'dirstate-v2.slow-path')
+ msg = _(b'unknown value for config "dirstate-v2.slow-path": "%s"\n')
+ ui.warn(msg % slow_path)
+ if not ui.quiet:
+ ui.warn(_(b'falling back to default value: %s\n') % default)
+ slow_path = default
+
+ msg = _(
+ b"accessing `dirstate-v2` repository without associated "
+ b"fast implementation."
+ )
+ hint = _(
+ b"check `hg help config.format.exp-dirstate-v2` " b"for details"
+ )
+ if not dirstate.HAS_FAST_DIRSTATE_V2:
+ if slow_path == b'warn':
+ msg = b"warning: " + msg + b'\n'
+ ui.warn(msg)
+ if not ui.quiet:
+ hint = b'(' + hint + b')\n'
+ ui.warn(hint)
+ if slow_path == b'abort':
+ raise error.Abort(msg, hint=hint)
if ui.configbool(b'storage', b'revlog.persistent-nodemap.mmap'):
options[b'persistent-nodemap.mmap'] = True
if ui.configbool(b'devel', b'persistent-nodemap'):