Mercurial > hg
view mercurial/scmposix.py @ 45871:a985c4fb23ca
transaction: change list of journal entries into a dictionary
The transaction object used to keep a mapping table of path names to
journal entries and a list of journal entries consisting of path and
file offset to truncate on rollback. The offsets are used in three
cases. repair.strip and rollback process all of them in one go, but they
care about the order. For them, it is perfectly reasonable to read the
journal back from disk as both operations already involve at least one
system call per journal entry. The other consumer is the revlog logic
for moving from inline to external data storage. It doesn't care about
the order of the journal and just needs to original offset stored.
Further optimisations are possible here to move the in-memory journal to
a set(), but without memoisation of the original revlog size this could
turn it into O(n^2) behavior in worst case when many revlogs need to
migrated.
Differential Revision: https://phab.mercurial-scm.org/D9277
author | Joerg Sonnenberger <joerg@bec.de> |
---|---|
date | Sat, 07 Nov 2020 21:34:09 +0100 |
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