Mercurial > hg
view mercurial/scmposix.py @ 47123:d8ac62374943
dirstate-tree: Make `DirstateMap` borrow from a bytes buffer
… that has the contents of the `.hg/dirstate` file.
This only applies to the tree-based flavor of `DirstateMap`.
For now only the entire `&[u8]` slice is stored, so this is not useful yet.
Adding a lifetime parameter to the `DirstateMap` struct (in hg-core) makes
Python bindings non-trivial because we keep that struct in a Python object
that has a dynamic lifetime tied to Python’s reference-counting and GC.
As long as we keep the `PyBytes` that owns the borrowed bytes buffer next to
the borrowing struct, the buffer will live long enough for the borrows to stay
valid. However this relationship cannot be expressed in safe Rust code in a
way that would statisfy they borrow-checker. We use `unsafe` code to erase
that lifetime parameter, and encapsulate it in a safe abstraction similar to
the owning-ref crate: https://docs.rs/owning_ref/
Differential Revision: https://phab.mercurial-scm.org/D10557
author | Simon Sapin <simon.sapin@octobus.net> |
---|---|
date | Fri, 30 Apr 2021 18:24:54 +0200 |
parents | 9ac96b9fa76e |
children | 6000f5b25c9b |
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from __future__ import absolute_import import array import errno import fcntl import os import sys from .pycompat import getattr from . import ( encoding, pycompat, util, ) # BSD 'more' escapes ANSI color sequences by default. This can be disabled by # $MORE variable, but there's no compatible option with Linux 'more'. Given # OS X is widely used and most modern Unix systems would have 'less', setting # 'less' as the default seems reasonable. fallbackpager = b'less' def _rcfiles(path): rcs = [os.path.join(path, b'hgrc')] rcdir = os.path.join(path, b'hgrc.d') try: rcs.extend( [ os.path.join(rcdir, f) for f, kind in sorted(util.listdir(rcdir)) if f.endswith(b".rc") ] ) except OSError: pass return rcs def systemrcpath(): path = [] if pycompat.sysplatform == b'plan9': root = b'lib/mercurial' else: root = b'etc/mercurial' # old mod_python does not set sys.argv if len(getattr(sys, 'argv', [])) > 0: p = os.path.dirname(os.path.dirname(pycompat.sysargv[0])) if p != b'/': path.extend(_rcfiles(os.path.join(p, root))) path.extend(_rcfiles(b'/' + root)) return path def userrcpath(): if pycompat.sysplatform == b'plan9': return [encoding.environ[b'home'] + b'/lib/hgrc'] elif pycompat.isdarwin: return [os.path.expanduser(b'~/.hgrc')] else: confighome = encoding.environ.get(b'XDG_CONFIG_HOME') if confighome is None or not os.path.isabs(confighome): confighome = os.path.expanduser(b'~/.config') return [ os.path.expanduser(b'~/.hgrc'), os.path.join(confighome, b'hg', b'hgrc'), ] def termsize(ui): try: import termios TIOCGWINSZ = termios.TIOCGWINSZ # unavailable on IRIX (issue3449) except (AttributeError, ImportError): return 80, 24 for dev in (ui.ferr, ui.fout, ui.fin): try: try: fd = dev.fileno() except AttributeError: continue if not os.isatty(fd): continue arri = fcntl.ioctl(fd, TIOCGWINSZ, b'\0' * 8) height, width = array.array('h', arri)[:2] if width > 0 and height > 0: return width, height except ValueError: pass except IOError as e: if e[0] == errno.EINVAL: # pytype: disable=unsupported-operands pass else: raise return 80, 24