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Make event triggering robust to (un)registration....
Make event triggering robust to (un)registration. Event callbacks can register or unregister new callbacks for the same event while executing, and the previous triggering implementation allowed for event callbacks to be inadvertently skipped. The fix is to make a copy of the list of callbacks before executing any of them. With this change, the resulting semantics are simple: any callbacks registered before triggering are executed, and any new callbacks registered are only visible at the next triggering of the event. Note that this could potentially break existing callers who expected newly-appended callbacks were immediately executed. Fixes #9447. Originally based on a patch by @marksandler2.

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release
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#!/usr/bin/env python
"""IPython release script.
This should ONLY be run at real release time.
"""
from __future__ import print_function
import os
import sys
from toollib import (get_ipdir, pjoin, cd, execfile, sh, archive,
sdists, archive_user, archive_dir, buildwheels)
from gh_api import post_download
# Get main ipython dir, this will raise if it doesn't pass some checks
ipdir = get_ipdir()
tooldir = pjoin(ipdir, 'tools')
distdir = pjoin(ipdir, 'dist')
# Where I keep static backups of each release
ipbackupdir = os.path.expanduser('~/ipython/backup')
if not os.path.exists(ipbackupdir):
os.makedirs(ipbackupdir)
# Start in main IPython dir
cd(ipdir)
# Load release info
version = None
execfile(pjoin('IPython','core','release.py'), globals())
# Build site addresses for file uploads
release_site = '%s/release/%s' % (archive, version)
backup_site = '%s/backup/' % archive
# Start actual release process
print()
print('Releasing IPython')
print('=================')
print()
print('Version:', version)
print()
print('Source IPython directory:', ipdir)
print()
# Perform local backup, go to tools dir to run it.
cd(tooldir)
sh('./make_tarball.py')
sh('mv ipython-*.tgz %s' % ipbackupdir)
# Build release files
sh('./build_release %s' % ipdir)
# Not Registering with PyPI, registering with setup.py is insecure as communication is not encrypted
cd(ipdir)
# Upload all files
sh(sdists)
buildwheels()
if 'upload' not in sys.argv:
print("`./release upload` to register and release")
sys.exit(0)
print('Will not upload with setuptools as upload connection is insecure. Please use `twine upload dist/*` to upload the files to PyPI')
cd(distdir)
print( 'Uploading distribution files to GitHub...')
for fname in os.listdir('.'):
# TODO: update to GitHub releases API
continue
print('uploading %s to GitHub' % fname)
desc = "IPython %s source distribution" % version
post_download("ipython/ipython", fname, description=desc)
# Make target dir if it doesn't exist
print('Uploading IPython to backup site.')
sh('ssh %s "mkdir -p %s/release/%s" ' % (archive_user, archive_dir, version))
sh('scp * %s' % release_site)
print( 'Uploading backup files...')
cd(ipbackupdir)
sh('scp `ls -1tr *tgz | tail -1` %s' % backup_site)
print('Done!')