interfaces: convert the zope `Attribute` attrs to regular fields
At this point, we should have a useful protocol class.
The file syntax requires the type to be supplied for any fields that are
declared, but we'll leave the complex ones partially unspecified for now, for
simplicity. (Also, the things documented as `Callable` are really as future
type annotating worked showed- roll with it for now, but they're marked as TODO
for fixing later.) All of the fields and all of the attrs will need type
annotations, or the type rules say they are considered to be `Any`. That can be
done in a separate pass, possibly applying the `dirstate.pyi` file generated
from the concrete class.
The first cut of this turned the `interfaceutil.Attribute` fields into plain
fields, and thus the types on them. PyCharm flagged a few things as having
incompatible signatures when the concrete dirstate class subclassed this, when
the concrete class has them declared as `@property`. So they've been changed to
`@property` here in those cases. The remaining fields that are decorated in the
concrete class have comments noting the differences. We'll see if they need to
be changed going forward, but leave them for now. We'll be in trouble if the
`@util.propertycache` is needed, because we can't import that module here at
runtime, due to circular imports.
#!/usr/bin/env python3
"""
Utility for inspecting files in various ways.
This tool is like the collection of tools found in a unix environment but are
cross platform and stable and suitable for our needs in the test suite.
This can be used instead of tools like:
[
dd
find
head
hexdump
ls
md5sum
readlink
sha1sum
stat
tail
test
readlink.py
md5sum.py
"""
import binascii
import glob
import hashlib
import optparse
import os
import re
import sys
def iterbytes(s):
for i in range(len(s)):
yield s[i : i + 1]
def visit(opts, filenames, outfile):
"""Process filenames in the way specified in opts, writing output to
outfile."""
for f in sorted(filenames):
isstdin = f == '-'
if not isstdin and not os.path.lexists(f):
outfile.write(b'%s: file not found\n' % f.encode('utf-8'))
continue
quiet = opts.quiet and not opts.recurse or isstdin
isdir = os.path.isdir(f)
islink = os.path.islink(f)
isfile = os.path.isfile(f) and not islink
dirfiles = None
content = None
facts = []
if isfile:
if opts.type:
facts.append(b'file')
needs_reading = (
opts.hexdump,
opts.dump,
opts.md5,
opts.sha1,
opts.raw_sha1,
opts.sha256,
)
if any(needs_reading):
with open(f, 'rb') as fobj:
content = fobj.read()
elif islink:
if opts.type:
facts.append(b'link')
content = os.readlink(f).encode('utf8')
elif isstdin:
content = getattr(sys.stdin, 'buffer', sys.stdin).read()
if opts.size:
facts.append(b'size=%d' % len(content))
elif isdir:
if opts.recurse or opts.type:
dirfiles = glob.glob(f + '/*')
facts.append(b'directory with %d files' % len(dirfiles))
elif opts.type:
facts.append(b'type unknown')
if not isstdin:
stat = os.lstat(f)
if opts.size and not isdir:
facts.append(b'size=%d' % stat.st_size)
if opts.mode and not islink:
facts.append(b'mode=%o' % (stat.st_mode & 0o777))
if opts.links:
facts.append(b'links=%d' % stat.st_nlink)
if opts.newer:
# mtime might be in whole seconds so newer file might be same
if stat.st_mtime >= os.stat(opts.newer).st_mtime:
facts.append(
b'newer than %s' % opts.newer.encode('utf8', 'replace')
)
else:
facts.append(
b'older than %s' % opts.newer.encode('utf8', 'replace')
)
if opts.md5 and content is not None:
h = hashlib.md5(content)
facts.append(b'md5=%s' % binascii.hexlify(h.digest())[: opts.bytes])
if opts.raw_sha1 and content is not None:
h = hashlib.sha1(content)
facts.append(b'raw-sha1=%s' % h.digest()[: opts.bytes])
if opts.sha1 and content is not None:
h = hashlib.sha1(content)
facts.append(
b'sha1=%s' % binascii.hexlify(h.digest())[: opts.bytes]
)
if opts.sha256 and content is not None:
h = hashlib.sha256(content)
facts.append(
b'sha256=%s' % binascii.hexlify(h.digest())[: opts.bytes]
)
if isstdin:
outfile.write(b', '.join(facts) + b'\n')
elif facts:
outfile.write(b'%s: %s\n' % (f.encode('utf-8'), b', '.join(facts)))
elif not quiet:
outfile.write(b'%s:\n' % f.encode('utf-8'))
if content is not None:
chunk = content
if not islink:
if opts.lines:
if opts.lines >= 0:
chunk = b''.join(chunk.splitlines(True)[: opts.lines])
else:
chunk = b''.join(chunk.splitlines(True)[opts.lines :])
if opts.bytes:
if opts.bytes >= 0:
chunk = chunk[: opts.bytes]
else:
chunk = chunk[opts.bytes :]
if opts.hexdump:
for i in range(0, len(chunk), 16):
s = chunk[i : i + 16]
outfile.write(
b'%04x: %-47s |%s|\n'
% (
i,
b' '.join(b'%02x' % ord(c) for c in iterbytes(s)),
re.sub(b'[^ -~]', b'.', s),
)
)
if opts.dump:
if not quiet:
outfile.write(b'>>>\n')
outfile.write(chunk)
if not quiet:
if chunk.endswith(b'\n'):
outfile.write(b'<<<\n')
else:
outfile.write(b'\n<<< no trailing newline\n')
if opts.recurse and dirfiles:
assert not isstdin
visit(opts, dirfiles, outfile)
if __name__ == "__main__":
parser = optparse.OptionParser("%prog [options] [filenames]")
parser.add_option(
"-t",
"--type",
action="store_true",
help="show file type (file or directory)",
)
parser.add_option(
"-m", "--mode", action="store_true", help="show file mode"
)
parser.add_option(
"-l", "--links", action="store_true", help="show number of links"
)
parser.add_option(
"-s", "--size", action="store_true", help="show size of file"
)
parser.add_option(
"-n", "--newer", action="store", help="check if file is newer (or same)"
)
parser.add_option(
"-r", "--recurse", action="store_true", help="recurse into directories"
)
parser.add_option(
"-S",
"--sha1",
action="store_true",
help="show sha1 hash of the content",
)
parser.add_option(
"",
"--raw-sha1",
action="store_true",
help="show raw bytes of the sha1 hash of the content",
)
parser.add_option(
"",
"--sha256",
action="store_true",
help="show sha256 hash of the content",
)
parser.add_option(
"-M", "--md5", action="store_true", help="show md5 hash of the content"
)
parser.add_option(
"-D", "--dump", action="store_true", help="dump file content"
)
parser.add_option(
"-H", "--hexdump", action="store_true", help="hexdump file content"
)
parser.add_option(
"-B", "--bytes", type="int", help="number of characters to dump"
)
parser.add_option(
"-L", "--lines", type="int", help="number of lines to dump"
)
parser.add_option(
"-q", "--quiet", action="store_true", help="no default output"
)
(opts, filenames) = parser.parse_args(sys.argv[1:])
if not filenames:
filenames = ['-']
visit(opts, filenames, getattr(sys.stdout, 'buffer', sys.stdout))