cext: extract revlog/index parsing code to own C file parsers.c is ~3000 lines and ~2/3 of it is related to the revlog index type. We already have separate C source files for directory utilities and manifest parsing. I think the quite unwieldy revlog/index parsing code should be self-contained as well. I performed the extraction as a file copy then removed content from both sides in order to preserve file history and blame. As part of this, I also had to move the hexdigit table and function to a shared header since it is used by both parsers.c and revlog.c # no-check-commit

debugcommands: use temporary dict for its command table Instead, load the table by commands.py so the debug commands should always be populated. The table in debugcommands.py is unnamed so extension authors wouldn't be confused to wrap debugcommands.table in place of commands.table.

commands: move debugcommands and debugcomplete back to commands module These commands depend heavily on the commands table, so it doesn't make much sense to isolate them to debugcommands.py. This helps eliminating the future import cycle.