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
#!/usr/bin/env python
# Undump a dump from dumprevlog
# $ hg init
# $ undumprevlog < repo.dump
from __future__ import absolute_import
import sys
from mercurial import (
node,
revlog,
transaction,
util,
vfs as vfsmod,
)
for fp in (sys.stdin, sys.stdout, sys.stderr):
util.setbinary(fp)
opener = vfsmod.vfs('.', False)
tr = transaction.transaction(sys.stderr.write, opener, {'store': opener},
"undump.journal")
while True:
l = sys.stdin.readline()
if not l:
break
if l.startswith("file:"):
f = l[6:-1]
r = revlog.revlog(opener, f)
print f
elif l.startswith("node:"):
n = node.bin(l[6:-1])
elif l.startswith("linkrev:"):
lr = int(l[9:-1])
elif l.startswith("parents:"):
p = l[9:-1].split()
p1 = node.bin(p[0])
p2 = node.bin(p[1])
elif l.startswith("length:"):
length = int(l[8:-1])
sys.stdin.readline() # start marker
d = sys.stdin.read(length)
sys.stdin.readline() # end marker
r.addrevision(d, tr, lr, p1, p2)
tr.close()