We perform all that we can non-interactively before prompting the user for input
via their merge tool. This allows for a maximally consistent state when the user
is first prompted.
The test output changes indicate the actual behavior change happening.
Copy tracing can be up to 80% of rebase time when rebasing stacks of commits in
large repos (hundreds of thousands of files). This provides the option of
turning off the majority of copy tracing. It does not turn off _forwardcopies()
since that is used to carry copy information inside a commit across a rebase.
This will affect the situation where a user edits a file, then rebases on top of
commits that have moved that file. The move will not be detected and the user
will have to manually resolve the issue (possibly by redoing the rebase with
this flag off).
The reason to have a flag instead of trying to fix the actual copy tracing
performance is that copy tracing is fundamentally an O(number of files in the
repo) operation. In order to know if file X in the rebase source was copied
anywhere, we have to walk the filelog for every new file that exists in the
rebase destination (i.e. a file in the destination that is not in the common
ancestor). Without an index that lets us trace forward (i.e. from file Y in the
common ancestor forward to the rebase destination), it will never be an O(number
of changes in my branch) operation.
In mozilla-central, rebasing a 3 commit stack across 20,000 revs goes from 39s
to 11s.
When the progress extension is not enabled, each call to 'ui.progress' used to
issue a debug message. This results is a very verbose output and often redundant
in tests. Dropping it makes tests less volatile to factor they do not meant to
test.
We had to alter the sed trick in 'test-rename-merge2.t'. Sed is used to drop all
output from a certain point and hidding the progress output remove its anchor.
So we anchor on something else.
Preparing for action list split-up, making sure the final change don't have any
test changes.
The patch moves debug statements around without really changing anything.
Arguably, it temporarily makes the code worse. The only justification is that
it makes it easier to review the test changes ... and in the end the big change
will not change test output at all.
The changes to test output are due to changes in the ordering of debug output.
That is mainly because we now do the debug logging for files when we actually
process them. Files are also processed in a slightly different but still
correct order. It is now primarily ordered by action type, secondarily by
filename.
The patch introduces some redundancy. Some of it will be removed again, some of
it will in the end help code readability and efficiency. It is possible that we
later on could introduce a "process this action list and do some logging and
progress reporting and apply this function".
The "preserving X for resolve" debug statements will only have single space
indentation. It will no longer have a leading single space indented "f: msg ->
m" message. Having this message double indented would thus no longer make
sense.
The bid actions will temporarily be sorted using a custom sort key that happens
to match the sort order the simplified code will have in the end.
Show messages at a point where the actions have been sorted, thus preparing for
backout of 14f4258e3526.
This makes manifestmerge more of a silent operation, just like 'copies' is.
Indent 'preserving' messages to make them subordinate to the action logging so
they fit in the new context. (The 'preserving' messages are quite redundant and
could also be removed completely.)
The -> in debug messages is currently overloaded to mean both source to dest
and dest to source. To fix this, we add explicit labels and make the arrow
direction consistent.
Many tests didn't change back from subdirectories at the end of the tests ...
and they don't have to. The missing 'cd ..' could always be added when another
test case is added to the test file.
This change do that tests (99.5%) consistently end up in $TESTDIR where they
started, thus making it simpler to extend them or move them around.
Many tests fixed the commit date of their changesets at '1000000 0' or
similar. However testing with "Mon Jan 12 13:46:40 1970 +0000" is not
better than testing with "Thu Jan 01 00:00:00 1970 +0000", which is
the default run-tests.py installs.
Removing the unnecessary flag removes some clutter and will hopefully
make it clearer what the tests are really trying to test. Some tests
did not even change their output when the dates were changed, in which
case the -d flag was truly irrelevant.
Dates used in sequence (such as '0 0', '1 0', etc...) were left alone
since they may make the test easier to understand.
