cmdstate: introduce a "saver" contextmanager and use it in place of save()
Previously, the state was only saved in some paths out of these functions. This
can be problematic, if the user ctrl-c's (or `kill -9`'s) the process, or we
exit out of `relocate` for anything besides the "expected" reason, we won't
record that we were in the middle of an evolve.
One of our users has discovered that this leaves hg in a weird state; the user
did something like this:
```
$ hg evolve
<something goes wrong with the merge tool, hits ctrl-c>
<deals with the merge conflicts>
$ hg evolve --continue
abort: no interrupted evolve to continue
$ hg evolve
abort: uncommitted changes
# Note: commands.status.verbose=True is set.
$ hg status
M foo
# The repository is in an unfinished *update* state.
# No unresolved merge conflicts
# To continue: hg update
```
The user did an `hg update`, but it didn't actually do anything besides take it
out of the unfinished update state (the files were still dirty in the working
directory).
import os
from distutils.core import setup
from os.path import dirname, join
META_PATH = 'hgext3rd/evolve/metadata.py'
def get_metadata():
meta = {}
fullpath = join(dirname(__file__), META_PATH)
with open(fullpath, 'r') as fp:
exec(fp.read(), meta)
return meta
def get_version():
'''Read version info from a file without importing it'''
return get_metadata()['__version__']
def min_hg_version():
'''Read version info from a file without importing it'''
return get_metadata()['minimumhgversion']
py_modules = [
'hgext3rd.serverminitopic',
]
py_packages = [
'hgext3rd',
'hgext3rd.evolve',
'hgext3rd.evolve.thirdparty',
'hgext3rd.topic',
]
py_versions = '>=2.7, !=3.0.*, !=3.1.*, !=3.2.*, !=3.3.*, !=3.4.*, !=3.5.*, <4'
if os.environ.get('INCLUDE_INHIBIT'):
py_modules.append('hgext3rd.evolve.hack.inhibit')
py_modules.append('hgext3rd.evolve.hack.directaccess')
setup(
name='hg-evolve',
version=get_version(),
author='Pierre-Yves David',
author_email='pierre-yves.david@ens-lyon.org',
maintainer='Pierre-Yves David',
maintainer_email='pierre-yves.david@ens-lyon.org',
url='https://www.mercurial-scm.org/doc/evolution/',
description='Flexible evolution of Mercurial history.',
long_description=open('README').read(),
keywords='hg mercurial',
license='GPLv2+',
py_modules=py_modules,
packages=py_packages,
python_requires=py_versions
)