repair: move check for existing transaction earlier
Several benefits:
* Gets close the comment describing it
* Splits off unrelated comment about "backup" argument
* Error checking is customarily done early
* If we added an early return to the method, it would still
consistently fail if there was an existing transaction (so
we would find and fix that case quickly)
One test needs updating with for this change, because we no longer
create the backup bundle before we fail. I don't see much reason to
create that backup bundle. If some command was adding content and then
trying to strip it as well within the transaction, we would have a
backup for the user, but the risk of that not being discovered in
development seems very small.
#require test-repo
$ . "$TESTDIR/helpers-testrepo.sh"
$ import_checker="$TESTDIR"/../contrib/import-checker.py
$ cd "$TESTDIR"/..
There are a handful of cases here that require renaming a module so it
doesn't overlap with a stdlib module name. There are also some cycles
here that we should still endeavor to fix, and some cycles will be
hidden by deduplication algorithm in the cycle detector, so fixing
these may expose other cycles.
Known-bad files are excluded by -X as some of them would produce unstable
outputs, which should be fixed later.
$ hg locate 'set:**.py or grep(r"^#!.*?python")' \
> 'tests/**.t' \
> -X contrib/debugshell.py \
> -X contrib/python-zstandard/ \
> -X contrib/win32/hgwebdir_wsgi.py \
> -X doc/gendoc.py \
> -X doc/hgmanpage.py \
> -X i18n/posplit \
> -X tests/test-hgweb-auth.py \
> -X tests/hypothesishelpers.py \
> -X tests/test-ctxmanager.py \
> -X tests/test-lock.py \
> -X tests/test-verify-repo-operations.py \
> -X tests/test-hook.t \
> -X tests/test-import.t \
> -X tests/test-imports-checker.t \
> -X tests/test-commit-interactive.t \
> -X tests/test-contrib-check-code.t \
> -X tests/test-extension.t \
> -X tests/test-hghave.t \
> -X tests/test-hgweb-no-path-info.t \
> -X tests/test-hgweb-no-request-uri.t \
> -X tests/test-hgweb-non-interactive.t \
> | sed 's-\\-/-g' | python "$import_checker" -