templates: add filter to reverse list
The filter supports only lists because for lists, it’s straightforward to
implement. Reversing text doesn’t seem very useful and is hard to implement.
Reversing the bytes would break multi-bytes encodings. Reversing the code
points would break characters consisting of multiple code points. Reversing
graphemes is non-trivial without using a library not included in the standard
library.
#!/usr/bin/env python3
# Dump revlogs as raw data stream
# $ find .hg/store/ -name "*.i" | xargs dumprevlog > repo.dump
import sys
from mercurial.node import hex
from mercurial import (
encoding,
pycompat,
revlog,
)
from mercurial.utils import procutil
from mercurial.revlogutils import (
constants as revlog_constants,
)
for fp in (sys.stdin, sys.stdout, sys.stderr):
procutil.setbinary(fp)
def binopen(path, mode=b'rb'):
if b'b' not in mode:
mode = mode + b'b'
return open(path, pycompat.sysstr(mode))
binopen.options = {}
def printb(data, end=b'\n'):
sys.stdout.flush()
procutil.stdout.write(data + end)
for f in sys.argv[1:]:
localf = encoding.strtolocal(f)
if not localf.endswith(b'.i'):
print("file:", f, file=sys.stderr)
print(" invalid filename", file=sys.stderr)
r = revlog.revlog(
binopen,
target=(revlog_constants.KIND_OTHER, b'dump-revlog'),
radix=localf[:-2],
)
print("file:", f)
for i in r:
n = r.node(i)
p = r.parents(n)
d = r.revision(n)
printb(b"node: %s" % hex(n))
printb(b"linkrev: %d" % r.linkrev(i))
printb(b"parents: %s %s" % (hex(p[0]), hex(p[1])))
printb(b"length: %d" % len(d))
printb(b"-start-")
printb(d)
printb(b"-end-")