##// END OF EJS Templates
posix: always seek to EOF when opening a file in append mode...
posix: always seek to EOF when opening a file in append mode Python 3 already does this, so skip it there. Consider the program: #include <stdio.h> int main() { FILE *f = fopen("narf", "w"); fprintf(f, "narf\n"); fclose(f); f = fopen("narf", "a"); printf("%ld\n", ftell(f)); fprintf(f, "troz\n"); printf("%ld\n", ftell(f)); return 0; } on macOS, FreeBSD, and Linux with glibc, this program prints 5 10 but on musl libc (Alpine Linux and probably others) this prints 0 10 By my reading of https://pubs.opengroup.org/onlinepubs/009695399/functions/fopen.html this is technically correct, specifically: > Opening a file with append mode (a as the first character in the > mode argument) shall cause all subsequent writes to the file to be > forced to the then current end-of-file, regardless of intervening > calls to fseek(). in other words, the file position doesn't really matter in append-mode files, and we can't depend on it being at all meaningful unless we perform a seek() before tell() after open(..., 'a'). Experimentally after a .write() we can do a .tell() and it'll always be reasonable, but I'm unclear from reading the specification if that's a smart thing to rely on. This matches what we do on Windows and what Python 3 does for free, so let's just be consistent. Thanks to Yuya for the idea.

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r42778:97ada9b8 5.0.2 stable
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mpm@selenic.com
Add back links from file revisions to changeset revisions...
r0 #!/usr/bin/env python
#
Matt Mackall
Update copyright notice
r1698 # mercurial - scalable distributed SCM
mpm@selenic.com
Add back links from file revisions to changeset revisions...
r0 #
Thomas Arendsen Hein
Updated copyright notices and add "and others" to "hg version"
r4635 # Copyright 2005-2007 Matt Mackall <mpm@selenic.com>
mpm@selenic.com
Add back links from file revisions to changeset revisions...
r0 #
Martin Geisler
updated license to be explicit about GPL version 2
r8225 # This software may be used and distributed according to the terms of the
Matt Mackall
Update license to GPLv2+
r10263 # GNU General Public License version 2 or any later version.
Augie Fackler
hg: update top-level script to use modern import conventions
r33897 from __future__ import absolute_import
mpm@selenic.com
Add back links from file revisions to changeset revisions...
r0
Dan Villiom Podlaski Christiansen
setup/hg: always load Mercurial from where it was installed....
r12661 import os
import sys
Augie Fackler
hg: add support for HGUNICODEPEDANTRY environment variable...
r21812 if os.environ.get('HGUNICODEPEDANTRY', False):
timeless
hg: limit HGUNICODEPEDANTRY to py2...
r29172 try:
reload(sys)
sys.setdefaultencoding("undefined")
except NameError:
pass
Augie Fackler
hg: add support for HGUNICODEPEDANTRY environment variable...
r21812
Dan Villiom Podlaski Christiansen
setup/hg: always load Mercurial from where it was installed....
r12661 libdir = '@LIBDIR@'
if libdir != '@' 'LIBDIR' '@':
if not os.path.isabs(libdir):
L. David Baron
setup/hg: handle hg being a symlink when appending relative libdir to sys.path...
r12805 libdir = os.path.join(os.path.dirname(os.path.realpath(__file__)),
libdir)
Dan Villiom Podlaski Christiansen
setup/hg: always load Mercurial from where it was installed....
r12661 libdir = os.path.abspath(libdir)
sys.path.insert(0, libdir)
Augie Fackler
hg: wrap the highest layer in the `hg` script possible in trace event...
r39628 from hgdemandimport import tracing
with tracing.log('hg script'):
# enable importing on demand to reduce startup time
try:
if sys.version_info[0] < 3 or sys.version_info >= (3, 6):
import hgdemandimport; hgdemandimport.enable()
except ImportError:
sys.stderr.write("abort: couldn't find mercurial libraries in [%s]\n" %
' '.join(sys.path))
sys.stderr.write("(check your install and PYTHONPATH)\n")
sys.exit(-1)
Thomas Arendsen Hein
Enable demandimport only in scripts, not in importable modules (issue605)...
r5197
Augie Fackler
hg: wrap the highest layer in the `hg` script possible in trace event...
r39628 from mercurial import dispatch
dispatch.run()