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).
#!/usr/bin/make -f
#export DH_VERBOSE=1
%:
dh $@ --with python2 --buildsystem=python_distutils
override_dh_auto_build:
dh_auto_build
# Workaround for Sphinx in Debian Buster defaulting to Python 3
SPHINXBUILD="python -m sphinx -bhtml" $(MAKE) -C docs
hgsrc_defined:
# Use "! -z" instead of "-n", because "-n" without arguments is true
test ! -z $(HGSRC) && test -d $(HGSRC) || (echo "$(HGSRC) is not a directory"; false)
ifeq (,$(filter nocheck, $(DEB_BUILD_OPTIONS)))
override_dh_auto_test: hgsrc_defined
cd tests && python $(HGSRC)/tests/run-tests.py --with-hg=$(HGSRC)/hg --blacklist=$(CURDIR)/debian/test-blacklist
endif
override_dh_python2:
# avoid conflict with mercurial's own hgext3rd/__init__.py
find debian -path '*/hgext3rd/__init__.py' -delete
dh_python2
override_dh_auto_clean: clean-docs
dh_auto_clean
rm -f tests/*.err
clean-docs:
rm -rf html
rm -f docs/static/logo-evolve.ico
rm -f docs/tutorials/tutorial.rst
rm -f docs/tutorials/topic-tutorial.rst