evolve: fix a bug in logic of choosing destination for hg update

evolve: add test to demonstrate a bug when active topic is empty Added test shows that when current active topic is empty and we try to run `hg up`, it fails with an error. It's because this case is not correctly handled when we find a destination to update (when topics are in play) Next patch will fix this.

evolvecmd: fix a typo node->None

evolvecmd: avoid a ctx->node->ctx conversion

evolvecmd: mark relocate() private

cleanup: replace .parents()[0] by .p1()

evolve: add more tests for --continue case when relocating "divergent"

evolve: use meaningful variable names for a return value

evolve: add logic to cover --continue case when relocating "divergent" Changes in test file demonstrate the added behaviour.

evolve: add test for `--continue` case when relocating "divergent" This test shows that for now we don't handle the continue case when relocating "divergent" cset hit merge conflict while resolving content-divergence. Next patch will be adding the support for --continue case.

evolve: use more specific key name to store in evolvestate Now, as we also relocate divergent cset if required, so let's use more specific key to track the relocation of "divergent" and "other".

evolve: move a test where it makes more sense

evolve: remove the unnecessary condition to check empty successors set I annotated the history of this "newer == [()]" condition and found that it was added in the initial stages of evolution project (more than 8 years ago) and there is no test where we get [()] as a successor set. So looks like "if not newer" is enough to check if it is empty. I also looked into obsutil.successorssets() implementation and I don't think it would give us [()] in any case.

evolve: delete redundant and incorrect code for updating dirstate In relocate() when we notice conflicts, we will try to fix up the dirstate by calling copies.duplicatecopies() and dirstatedance(). However, we had called _evolvemerge() just before that point and that has already fixed up the dirstate, so there's no need to do it again. Also, we did it incorrectly as the test case shows.

tests: demonstrate how evolve loses transitive copies when interrupted Let's say `b` has been renamed to `c` in commit A and then renamed to `d` in commit B. We now modify A in a way that will cause a conflict when we evolve B. `hg evolve` will now stop and let the user resolve the conflicts, but it will have lost the copy information in the working copy (should still be c->d).

evolve: use ui.configoverride() instead of ui.backupconfig() ui.configoverride() was added in hg 4.1. util.nullcontextmanager() was added in hg 4.4.

topic: use ui.configoverride() instead of ui.backupconfig() ui.configoverride() was added in hg 4.1. util.nullcontextmanager() was added in hg 4.4.

topic: use ui.configoverride() instead of ui.backupconfig() ui.configoverride() was added in hg 4.1. util.nullcontextmanager() was added in hg 4.4.

evolve: use ui.configoverride() instead of ui.backupconfig() ui.configoverride() was added in hg 4.1.

evolve: remove obsolete backup of allowemptycommit config We stopped setting the config in 88601e1cd5d8 (evolve: create new commit while resolving content-divergence, 2018-04-23), so there's no need to back it up.

evolve: remove dead initilization of "newnode" variable It's been dead since f9dad99a90d5 (evolve: create a new commit instead of amending one of the divergents, 2018-06-13).

evolve: fix a typo

changelog: mention the python 3 fix

changelog: mention the date fix for content divergence

branching: merge with stable

py3: fix several TypeError formatting bytes with an exception object

evolve: preserve date when resolving content-divergence (issue6202) This patch changes the implementation to do a 3 way merge. In case of actual conflict, it take the newest date from both sides of the content-divergence.

test: add test for content divergence involving a date update In this case, each side update the date.

test: add test for content divergence involving a date update In this case, one side update to an earlier date.

test: add test for content divergence involving a date update In this case, one side update to an older date.

test: highlight data handling when solving divergence The current handling of date is lacking, we add test to highlight this.

evolve: add tests for the case when resolution parent is ambiguous