mirror of
https://github.com/facebook/sapling.git
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5d738193e5
Summary: This is a major change to how we manage the dirstate in Eden's Hg extension. Previously, the dirstate information was stored under `$EDEN_CONFIG_DIR`, which is Eden's private storage. Any time the Mercurial extension wanted to read or write the dirstate, it had to make a Thrift request to Eden to do so on its behalf. The upside is that Eden could answer dirstate-related questions independently of the Python code. This was sufficiently different than how Mercurial's default dirstate worked that our subclass, `eden_dirstate`, had to override quite a bit of behavior. Failing to manage the `.hg/dirstate` file in a way similar to the way Mercurial does has exposed some "unofficial contracts" that Mercurial has. For example, tools like Nuclide rely on changes to the `.hg/dirstate` file as a heuristic to determine when to invalidate its internal caches for Mercurial data. Today, Mercurial has a well-factored `dirstatemap` abstraction that is primarily responsible for the transactions with the dirstate's data. With this split, we can focus on putting most of our customizations in our `eden_dirstate_map` subclass while our `eden_dirstate` class has to override fewer methods. Because the data is managed through the `.hg/dirstate` file, transaction logic in Mercurial that relies on renaming/copying that file will work out-of-the-box. This change also reduces the number of Thrift calls the Mercurial extension has to make for operations like `hg status` or `hg add`. In this revision, we introduce our own binary format for the `.hg/dirstate` file. The logic to read and write this file is in `eden/py/dirstate.py`. After the first 40 bytes, which are used for the parent hashes, the next four bytes are reserved for a version number for the file format so we can manage file format changes going forward. Admittedly one downside of this change is that it is a breaking change. Ideally, users should commit all of their local changes in their existing mounts, shutdown Eden, delete the old mounts, restart Eden, and re-clone. In the end, this change deletes a number of Mercurial-specific code and Thrift APIs from Eden. This is a better separation of concerns that makes Eden more SCM-agnostic. For example, this change removes `Dirstate.cpp` and `DirstatePersistance.cpp`, replacing them with the much simpler and more general `Differ.cpp`. The Mercurial-specific logic from `Dirstate.cpp` that turned a diff into an `hg status` now lives in the Mercurial extension in `EdenThriftClient.getStatus()`, which is much more appropriate. Note that this reverts the changes that were recently introduced in D6116105: we now need to intercept `localrepo.localrepository.dirstate` once again. Reviewed By: simpkins Differential Revision: D6179950 fbshipit-source-id: 5b78904909b669c9cc606e2fe1fd118ef6eaab95
618 lines
21 KiB
Python
618 lines
21 KiB
Python
#!/usr/bin/env python3
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#
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# Copyright (c) 2004-present, Facebook, Inc.
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# All rights reserved.
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#
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# This source code is licensed under the BSD-style license found in the
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# LICENSE file in the root directory of this source tree. An additional grant
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# of patent rights can be found in the PATENTS file in the same directory.
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import argparse
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import binascii
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import os
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import stat
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import sys
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from typing import List, IO, Tuple
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from facebook.eden.overlay.ttypes import OverlayDir
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import eden.dirstate
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from facebook.eden.ttypes import NoValueForKeyError, TimeSpec
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from . import cmd_util
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def get_mount_path(path: str) -> Tuple[str, str]:
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'''
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Given a path inside an eden mount, find the path to the eden root.
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Returns a tuple of (eden_mount_path, relative_path)
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where relative_path is the path such that
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os.path.join(eden_mount_path, relative_path) refers to the same file as the
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original input path.
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'''
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# TODO: This will probably be easier to do using the special .eden
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# directory, once the diff adding .eden lands.
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current_path = os.path.realpath(path)
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rel_path = ''
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while True:
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# For now we simply assume that the first mount point we come across is
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# the eden mount point. This doesn't handle bind mounts inside the
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# eden mount, but that's fine for now.
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if os.path.ismount(current_path):
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rel_path = os.path.normpath(rel_path)
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if rel_path == '.':
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rel_path = ''
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return (current_path, rel_path)
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parent, basename = os.path.split(current_path)
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if parent == current_path:
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raise Exception('eden mount point not found')
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current_path = parent
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rel_path = os.path.join(basename, rel_path)
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def escape_path(value: bytes) -> str:
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'''
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Take a binary path value, and return a printable string, with special
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characters escaped.
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'''
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def human_readable_byte(b):
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if b < 0x20 or b >= 0x7f:
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return '\\x{:02x}'.format(b)
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elif b == ord(b'\\'):
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return '\\\\'
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return chr(b)
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return ''.join(human_readable_byte(b) for b in value)
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def hash_str(value: bytes) -> str:
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'''
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Take a hash as a binary value, and return it represented as a hexadecimal
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string.
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'''
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return binascii.hexlify(value).decode('utf-8')
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def parse_object_id(value: str) -> bytes:
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'''
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Parse an object ID as a 40-byte hexadecimal string, and return a 20-byte
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binary value.
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'''
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try:
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binary = binascii.unhexlify(value)
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if len(binary) != 20:
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raise ValueError()
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except ValueError:
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raise ValueError('blob ID must be a 40-byte hexadecimal value')
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return binary
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def do_tree(args: argparse.Namespace):
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config = cmd_util.create_config(args)
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mount, rel_path = get_mount_path(args.mount)
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tree_id = parse_object_id(args.id)
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local_only = not args.load
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with config.get_thrift_client() as client:
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entries = client.debugGetScmTree(mount, tree_id,
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localStoreOnly=local_only)
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for entry in entries:
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file_type_flags, perms = _parse_mode(entry.mode)
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print('{} {:4o} {:40} {}'.format(
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file_type_flags, perms, hash_str(entry.id),
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escape_path(entry.name)))
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def do_blob(args: argparse.Namespace):
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config = cmd_util.create_config(args)
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mount, rel_path = get_mount_path(args.mount)
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blob_id = parse_object_id(args.id)
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local_only = not args.load
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with config.get_thrift_client() as client:
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data = client.debugGetScmBlob(mount, blob_id,
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localStoreOnly=local_only)
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sys.stdout.buffer.write(data)
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def do_blobmeta(args: argparse.Namespace):
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config = cmd_util.create_config(args)
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mount, rel_path = get_mount_path(args.mount)
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blob_id = parse_object_id(args.id)
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local_only = not args.load
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with config.get_thrift_client() as client:
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info = client.debugGetScmBlobMetadata(mount, blob_id,
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localStoreOnly=local_only)
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print('Blob ID: {}'.format(args.id))
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print('Size: {}'.format(info.size))
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print('SHA1: {}'.format(hash_str(info.contentsSha1)))
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_FILE_TYPE_FLAGS = {
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stat.S_IFREG: 'f',
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stat.S_IFDIR: 'd',
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stat.S_IFLNK: 'l',
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}
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def _parse_mode(mode: int) -> Tuple[str, int]:
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'''
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Take a mode value, and return a tuple of (file_type, permissions)
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where file type is a one-character flag indicating if this is a file,
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directory, or symbolic link.
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'''
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file_type_str = _FILE_TYPE_FLAGS.get(stat.S_IFMT(mode), '?')
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perms = (mode & 0o7777)
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return file_type_str, perms
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def do_hg_copy_map_get_all(args: argparse.Namespace):
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mount, _ = get_mount_path(args.path)
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_parents, _dirstate_tuples, copymap = _get_dirstate_data(mount)
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_print_copymap(copymap)
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def _print_copymap(copy_map) -> None:
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copies = [f'{item[1]} -> {item[0]}' for item in copy_map.items()]
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copies.sort()
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for copy in copies:
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print(copy)
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def do_hg_dirstate(args: argparse.Namespace) -> None:
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mount, _ = get_mount_path(args.path)
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_parents, dirstate_tuples, copymap = _get_dirstate_data(mount)
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printer = StdoutPrinter()
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entries = list(dirstate_tuples.items())
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print(printer.bold('Non-normal Files (%d):' % len(entries)))
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entries.sort(key=lambda entry: entry[0]) # Sort by key.
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for path, dirstate_tuple in entries:
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_print_hg_nonnormal_file(path, dirstate_tuple, printer)
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print(printer.bold('Copymap (%d):' % len(copymap)))
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_print_copymap(copymap)
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def do_hg_get_dirstate_tuple(args: argparse.Namespace):
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mount, rel_path = get_mount_path(args.path)
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_parents, dirstate_tuples, _copymap = _get_dirstate_data(mount)
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dirstate_tuple = dirstate_tuples.get(rel_path)
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printer = StdoutPrinter()
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if dirstate_tuple:
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_print_hg_nonnormal_file(rel_path, dirstate_tuple, printer)
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else:
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config = cmd_util.create_config(args)
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with config.get_thrift_client() as client:
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try:
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entry = client.getManifestEntry(mount, rel_path)
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dirstate_tuple = ('n', entry.mode, 0)
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_print_hg_nonnormal_file(rel_path, dirstate_tuple, printer)
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except NoValueForKeyError:
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print('No tuple for ' + rel_path, file=sys.stderr)
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return 1
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def _print_hg_nonnormal_file(
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rel_path, dirstate_tuple, printer: 'StdoutPrinter'
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) -> None:
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status = _dirstate_char_to_name(dirstate_tuple[0])
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merge_state = _dirstate_merge_state_to_name(dirstate_tuple[2])
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print(
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f'''\
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{printer.green(rel_path)}
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status = {status}
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mode = {oct(dirstate_tuple[1])}
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mergeState = {merge_state}\
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'''
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)
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def _dirstate_char_to_name(state: str) -> str:
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if state == 'n':
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return 'Normal'
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elif state == 'm':
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return 'NeedsMerging'
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elif state == 'r':
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return 'MarkedForRemoval'
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elif state == 'a':
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return 'MarkedForAddition'
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elif state == '?':
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return 'NotTracked'
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else:
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raise Exception(f'Unrecognized dirstate char: {state}')
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def _dirstate_merge_state_to_name(merge_state: int) -> str:
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if merge_state == 0:
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return 'NotApplicable'
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elif merge_state == -1:
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return 'BothParents'
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elif merge_state == -2:
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return 'OtherParent'
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else:
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raise Exception(f'Unrecognized merge_state value: {merge_state}')
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def _get_dirstate_data(mount):
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'''Returns a tuple of (parents, dirstate_tuples, copymap).
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On error, returns None.
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'''
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filename = os.path.join(mount, '.hg', 'dirstate')
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with open(filename, 'rb') as f:
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return eden.dirstate.read(f, filename)
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def do_inode(args: argparse.Namespace, out: IO[bytes] = None):
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if out is None:
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out = sys.stdout.buffer
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config = cmd_util.create_config(args)
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mount, rel_path = get_mount_path(args.path)
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with config.get_thrift_client() as client:
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results = client.debugInodeStatus(mount, rel_path)
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out.write(b'%d loaded TreeInodes\n' % len(results))
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for inode_info in results:
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_print_inode_info(inode_info, out)
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def _print_inode_info(inode_info, out: IO[bytes]):
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out.write(inode_info.path + b'\n')
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out.write(b' Inode number: %d\n' % inode_info.inodeNumber)
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out.write(b' Ref count: %d\n' % inode_info.refcount)
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out.write(b' Materialized?: %s\n' % str(inode_info.materialized).encode())
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out.write(b' Object ID: %s\n' % hash_str(inode_info.treeHash).encode())
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out.write(b' Entries (%d total):\n' % len(inode_info.entries))
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for entry in inode_info.entries:
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if entry.loaded:
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loaded_flag = 'L'
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else:
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loaded_flag = '-'
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file_type_str, perms = _parse_mode(entry.mode)
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line = ' {:9} {} {:4o} {} {:40} {}\n'.format(
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entry.inodeNumber, file_type_str, perms, loaded_flag,
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hash_str(entry.hash), escape_path(entry.name))
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out.write(line.encode())
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def _load_overlay_tree(overlay_dir: str, inode_number: int) -> OverlayDir:
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from thrift.util import Serializer
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from thrift.protocol import TCompactProtocol
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dir_name = '{:02x}'.format(inode_number % 256)
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overlay_file_path = os.path.join(overlay_dir, dir_name, str(inode_number))
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with open(overlay_file_path, 'rb') as f:
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data = f.read()
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assert data[0:4] == b'OVDR'
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tree_data = OverlayDir()
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protocol_factory = TCompactProtocol.TCompactProtocolFactory()
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Serializer.deserialize(protocol_factory, data[64:], tree_data)
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return tree_data
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def _print_overlay_tree(inode_number: int, path: str, tree_data: OverlayDir):
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def hex(binhash):
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return binascii.hexlify(binhash).decode('utf-8')
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print('Inode {}: {}'.format(inode_number, path))
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if not tree_data.entries:
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return
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name_width = max(len(name) for name in tree_data.entries)
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for name, entry in tree_data.entries.items():
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perms = entry.mode & 0o7777
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file_type = stat.S_IFMT(entry.mode)
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if file_type == stat.S_IFREG:
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file_type_flag = 'f'
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elif file_type == stat.S_IFDIR:
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file_type_flag = 'd'
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elif file_type == stat.S_IFLNK:
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file_type_flag = 'l'
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else:
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file_type_flag = '?'
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print(' {:{name_width}s} : {:12d} {} {:04o} {}'.format(
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name, entry.inodeNumber, file_type_flag, perms, hex(entry.hash),
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name_width=name_width))
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def _find_overlay_tree_rel(
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overlay_dir: str,
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root: OverlayDir,
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path_parts: List[str]) -> int:
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desired = path_parts[0]
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rest = path_parts[1:]
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for name, entry in root.entries.items(): # noqa: ignore=B007
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if name == desired:
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break
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else:
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raise Exception('path does not exist')
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if stat.S_IFMT(entry.mode) != stat.S_IFDIR:
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raise Exception('path does not not refer to a directory')
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if entry.hash:
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raise Exception('path is not materialized')
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if entry.inodeNumber == 0:
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raise Exception('path is not loaded')
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if rest:
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entry_data = _load_overlay_tree(overlay_dir, entry.inodeNumber)
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return _find_overlay_tree_rel(overlay_dir, entry_data, rest)
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return entry.inodeNumber
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def _find_overlay_tree(overlay_dir: str, path: str) -> int:
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assert path
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assert not os.path.isabs(path)
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root = _load_overlay_tree(overlay_dir, 1)
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path_parts = path.split(os.sep)
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return _find_overlay_tree_rel(overlay_dir, root, path_parts)
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def _display_overlay(
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args: argparse.Namespace,
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overlay_dir: str,
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inode_number: int,
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path: str,
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level: int = 0):
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data = _load_overlay_tree(overlay_dir, inode_number)
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_print_overlay_tree(inode_number, path, data)
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# If args.depth is negative, recurse forever.
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# Stop if args.depth is non-negative, and level reaches the maximum
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# requested recursion depth.
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if args.depth >= 0 and level >= args.depth:
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return
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for name, entry in data.entries.items():
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if entry.hash or entry.inodeNumber == 0:
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# This entry is not materialized
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continue
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if stat.S_IFMT(entry.mode) != stat.S_IFDIR:
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# Only display data for directories
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continue
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print()
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entry_path = os.path.join(path, name)
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_display_overlay(args, overlay_dir, entry.inodeNumber,
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entry_path, level + 1)
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def do_overlay(args: argparse.Namespace):
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config = cmd_util.create_config(args)
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mount, rel_path = get_mount_path(args.path or os.getcwd())
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# Get the path to the overlay directory for this mount point
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client_dir = config._get_client_dir_for_mount_point(mount)
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overlay_dir = os.path.join(client_dir, 'local')
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if args.number is not None:
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_display_overlay(args, overlay_dir, args.number, '')
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elif rel_path:
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rel_path = os.path.normpath(rel_path)
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inode_number = _find_overlay_tree(overlay_dir, rel_path)
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_display_overlay(args, overlay_dir, inode_number, rel_path)
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else:
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_display_overlay(args, overlay_dir, 1, '/')
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def do_getpath(args: argparse.Namespace):
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config = cmd_util.create_config(args)
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mount, _ = get_mount_path(args.path or os.getcwd())
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with config.get_thrift_client() as client:
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inodePathInfo = client.debugGetInodePath(mount, args.number)
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print('%s %s' %
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('loaded' if inodePathInfo.loaded else 'unloaded',
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os.path.normpath(os.path.join(mount, inodePathInfo.path)) if
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inodePathInfo.linked else 'unlinked'))
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def get_loaded_inode_count(inode_info):
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count = 0
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for tree in inode_info:
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for inode in tree.entries:
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if inode.loaded:
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count += 1
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return count
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def do_unload_inodes(args: argparse.Namespace):
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config = cmd_util.create_config(args)
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mount, rel_path = get_mount_path(args.path)
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with config.get_thrift_client() as client:
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inodeInfo_before_unload = client.debugInodeStatus(mount, rel_path)
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inodeCount_before_unload = get_loaded_inode_count(
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inodeInfo_before_unload)
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# set the age in nanoSeconds
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age = TimeSpec()
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age.seconds = int(args.age)
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age.nanoSeconds = int((args.age - age.seconds) * 10**9)
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client.unloadInodeForPath(mount, rel_path, age)
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inodeInfo_after_unload = client.debugInodeStatus(mount, rel_path)
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inodeCount_after_unload = get_loaded_inode_count(inodeInfo_after_unload)
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count = inodeCount_before_unload - inodeCount_after_unload
|
|
print('Unloaded %s Inodes under the directory : %s' %
|
|
(count, args.path))
|
|
|
|
|
|
def do_flush_cache(args: argparse.Namespace):
|
|
config = cmd_util.create_config(args)
|
|
mount, rel_path = get_mount_path(args.path)
|
|
|
|
with config.get_thrift_client() as client:
|
|
client.invalidateKernelInodeCache(mount, rel_path)
|
|
|
|
|
|
def do_set_log_level(args: argparse.Namespace):
|
|
config = cmd_util.create_config(args)
|
|
|
|
with config.get_thrift_client() as client:
|
|
result = client.debugSetLogLevel(args.category, args.level)
|
|
if result.categoryCreated:
|
|
print("Warning: New category '{}' created. Did you mistype?".format(
|
|
args.category))
|
|
|
|
|
|
class StdoutPrinter:
|
|
def __init__(self):
|
|
if sys.stdout.isatty():
|
|
import curses
|
|
curses.setupterm()
|
|
self._bold = (curses.tigetstr('bold') or b'').decode()
|
|
set_foreground = curses.tigetstr('setaf') or b''
|
|
self._red = curses.tparm(set_foreground, curses.COLOR_RED).decode()
|
|
self._green = curses.tparm(set_foreground, curses.COLOR_GREEN).decode()
|
|
self._reset = (curses.tigetstr('sgr0') or b'').decode()
|
|
else:
|
|
self._bold = ''
|
|
self._red = ''
|
|
self._green = ''
|
|
self._reset = ''
|
|
|
|
def bold(self, text: str) -> str:
|
|
return self._bold + text + self._reset
|
|
|
|
def green(self, text: str) -> str:
|
|
return self._green + text + self._reset
|
|
|
|
def red(self, text: str) -> str:
|
|
return self._red + text + self._reset
|
|
|
|
|
|
def setup_argparse(parser: argparse.ArgumentParser):
|
|
subparsers = parser.add_subparsers(dest='subparser_name')
|
|
|
|
parser = subparsers.add_parser(
|
|
'tree', help='Show eden\'s data for a source control tree')
|
|
parser.add_argument('-L', '--load',
|
|
action='store_true', default=False,
|
|
help='Load data from the backing store if necessary')
|
|
parser.add_argument('mount', help='The eden mount point path.')
|
|
parser.add_argument('id', help='The tree ID')
|
|
parser.set_defaults(func=do_tree)
|
|
|
|
parser = subparsers.add_parser(
|
|
'blob', help='Show eden\'s data for a source control blob')
|
|
parser.add_argument('-L', '--load',
|
|
action='store_true', default=False,
|
|
help='Load data from the backing store if necessary')
|
|
parser.add_argument('mount', help='The eden mount point path.')
|
|
parser.add_argument('id', help='The blob ID')
|
|
parser.set_defaults(func=do_blob)
|
|
|
|
parser = subparsers.add_parser(
|
|
'blobmeta',
|
|
help='Show eden\'s metadata about a source control blob')
|
|
parser.add_argument('-L', '--load',
|
|
action='store_true', default=False,
|
|
help='Load data from the backing store if necessary')
|
|
parser.add_argument('mount', help='The eden mount point path.')
|
|
parser.add_argument('id', help='The blob ID')
|
|
parser.set_defaults(func=do_blobmeta)
|
|
|
|
parser = subparsers.add_parser(
|
|
'hg_copy_map_get_all', help='Copymap for dirstate')
|
|
parser.add_argument(
|
|
'path', nargs='?', default=os.getcwd(),
|
|
help='The path to an Eden mount point. Uses `pwd` by default.')
|
|
parser.set_defaults(func=do_hg_copy_map_get_all)
|
|
|
|
parser = subparsers.add_parser(
|
|
'hg_dirstate', help='Print full dirstate')
|
|
parser.add_argument(
|
|
'path', nargs='?', default=os.getcwd(),
|
|
help='The path to an Eden mount point. Uses `pwd` by default.')
|
|
parser.set_defaults(func=do_hg_dirstate)
|
|
|
|
parser = subparsers.add_parser(
|
|
'hg_get_dirstate_tuple', help='Dirstate status for file')
|
|
parser.add_argument(
|
|
'path',
|
|
help='The path to the file whose status should be queried.')
|
|
parser.set_defaults(func=do_hg_get_dirstate_tuple)
|
|
|
|
parser = subparsers.add_parser(
|
|
'inode', help='Show data about loaded inodes')
|
|
parser.add_argument(
|
|
'path',
|
|
help='The path to the eden mount point. If a subdirectory inside '
|
|
'a mount point is specified, only data about inodes under the '
|
|
'specified subdirectory will be reported.')
|
|
parser.set_defaults(func=do_inode)
|
|
|
|
parser = subparsers.add_parser(
|
|
'overlay', help='Show data about the overlay')
|
|
parser.add_argument(
|
|
'-n', '--number',
|
|
type=int,
|
|
help='Display information for the specified inode number.')
|
|
parser.add_argument(
|
|
'-d', '--depth',
|
|
type=int, default=0,
|
|
help='Recurse to the specified depth.')
|
|
parser.add_argument(
|
|
'-r', '--recurse',
|
|
action='store_const', const=-1, dest='depth', default=0,
|
|
help='Recursively print child entries.')
|
|
parser.add_argument(
|
|
'path', nargs='?',
|
|
help='The path to the eden mount point.')
|
|
parser.set_defaults(func=do_overlay)
|
|
|
|
parser = subparsers.add_parser(
|
|
'getpath', help='Get the eden path that corresponds to an inode number')
|
|
parser.add_argument(
|
|
'path', nargs='?',
|
|
help='The path to an Eden mount point. Uses `pwd` by default.')
|
|
parser.add_argument(
|
|
'number',
|
|
type=int,
|
|
help='Display information for the specified inode number.')
|
|
parser.set_defaults(func=do_getpath)
|
|
|
|
parser = subparsers.add_parser(
|
|
'unload', help='Unload unused inodes')
|
|
parser.add_argument(
|
|
'path',
|
|
help='The path to the eden mount point. If a subdirectory inside '
|
|
'a mount point is specified, only inodes under the '
|
|
'specified subdirectory will be unloaded.')
|
|
parser.add_argument(
|
|
'age',
|
|
type=float,
|
|
help='Minimum age of the inodes to be unloaded in seconds'
|
|
)
|
|
parser.set_defaults(func=do_unload_inodes)
|
|
|
|
parser = subparsers.add_parser(
|
|
'flush_cache', help='Flush kernel cache for inode')
|
|
parser.add_argument(
|
|
'path',
|
|
help='Path to a directory/file inside an eden mount.')
|
|
parser.set_defaults(func=do_flush_cache)
|
|
|
|
parser = subparsers.add_parser(
|
|
'set_log_level',
|
|
help='Set the log level for a given category in the edenfs daemon.')
|
|
parser.add_argument(
|
|
'category',
|
|
type=str,
|
|
help='Period-separated log category.')
|
|
parser.add_argument(
|
|
'level',
|
|
type=str,
|
|
help='Log level string as understood by stringToLogLevel.'
|
|
)
|
|
parser.set_defaults(func=do_set_log_level)
|