Mercurial > hg
view tests/test-show-stack.t @ 44758:45f3f35cefe7
copies: fix the changeset based algorithm regarding merge
In 99ebde4fec99, we changed the list of files stored into the `files` field.
This lead to the changeset centric copy algorithm to break in various merge
situation involving merge. Older information could reach the merge through
`p1`, and while information from `p2` was strictly fresher, it would get
overwritten anyway.
We update the situation with more details about which revision introduces rename
information. This help use making the right decision in case of merge.
We are now running a more comprehensive suite of test with include this kind of
situation. The behavior differ slightly from the filelog based in a couple of
instance. There is mostly two distinct cases:
1) there are conflicting rename information in a merge (different rename history
on each side). In this case the filelog based implementation arbitrarily pick a
side based on the file-revision-number. So it depends on a local factor. The
changeset centric algorithm will use a deterministic approach, by picking the
information coming from the first parent of the merge. This is stable across
different clone.
2) rename information related to file that exist in both source and destination.
The filelog based implementation do not even try to detect these, however the
changeset centric one get them for "free" (it is simpler to detect them than
not).
The new implementation focus on correctness. Performance improvement will come
later.
Differential Revision: https://phab.mercurial-scm.org/D8244
author | Pierre-Yves David <pierre-yves.david@octobus.net> |
---|---|
date | Thu, 05 Mar 2020 17:55:05 +0100 |
parents | e6b5e7329ff2 |
children |
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$ cat >> $HGRCPATH << EOF > [extensions] > show = > EOF $ hg init repo0 $ cd repo0 Empty repo / no checkout results in error $ hg show stack abort: stack view only available when there is a working directory [255] Stack displays single draft changeset as root revision $ echo 0 > foo $ hg -q commit -A -m 'commit 0' $ hg show stack @ 9f17 commit 0 Stack displays multiple draft changesets $ echo 1 > foo $ hg commit -m 'commit 1' $ echo 2 > foo $ hg commit -m 'commit 2' $ echo 3 > foo $ hg commit -m 'commit 3' $ echo 4 > foo $ hg commit -m 'commit 4' $ hg show stack @ 2737 commit 4 o d1a6 commit 3 o 128c commit 2 o 181c commit 1 o 9f17 commit 0 Public parent of draft base is displayed, separated from stack $ hg phase --public -r 0 $ hg show stack @ 2737 commit 4 o d1a6 commit 3 o 128c commit 2 o 181c commit 1 / (stack base) o 9f17 commit 0 $ hg phase --public -r 1 $ hg show stack @ 2737 commit 4 o d1a6 commit 3 o 128c commit 2 / (stack base) o 181c commit 1 Draft descendants are shown $ hg -q up 2 $ hg show stack o 2737 commit 4 o d1a6 commit 3 @ 128c commit 2 / (stack base) o 181c commit 1 $ hg -q up 3 $ hg show stack o 2737 commit 4 @ d1a6 commit 3 o 128c commit 2 / (stack base) o 181c commit 1 working dir on public changeset should display special message $ hg -q up 1 $ hg show stack (empty stack; working directory parent is a published changeset) Branch point in descendants displayed at top of graph $ hg -q up 3 $ echo b > foo $ hg commit -m 'commit 5 (new dag branch)' created new head $ hg -q up 2 $ hg show stack \ / (multiple children) | o d1a6 commit 3 @ 128c commit 2 / (stack base) o 181c commit 1 $ cd .. Base is stopped at merges $ hg init merge-base $ cd merge-base $ echo 0 > foo $ hg -q commit -A -m initial $ echo h1 > foo $ hg commit -m 'head 1' $ hg -q up 0 $ echo h2 > foo $ hg -q commit -m 'head 2' $ hg phase --public -r 0:tip $ hg -q up 1 $ hg merge -t :local 2 0 files updated, 1 files merged, 0 files removed, 0 files unresolved (branch merge, don't forget to commit) $ hg commit -m 'merge heads' TODO doesn't yet handle case where wdir is a draft merge $ hg show stack @ 8ee9 merge heads / (stack base) o 5947 head 1 $ echo d1 > foo $ hg commit -m 'draft 1' $ echo d2 > foo $ hg commit -m 'draft 2' $ hg show stack @ 430d draft 2 o 787b draft 1 / (stack base) o 8ee9 merge heads $ cd .. Now move on to stacks when there are more commits after the base branchpoint $ hg init public-rebase $ cd public-rebase $ echo 0 > foo $ hg -q commit -A -m 'base' $ hg phase --public -r . $ echo d1 > foo $ hg commit -m 'draft 1' $ echo d2 > foo $ hg commit -m 'draft 2' $ hg -q up 0 $ echo 1 > foo $ hg commit -m 'new 1' created new head $ echo 2 > foo $ hg commit -m 'new 2' $ hg -q up 2 Newer draft heads don't impact output $ hg show stack @ eaff draft 2 o 2b21 draft 1 / (stack base) o b66b base Newer public heads are rendered $ hg phase --public -r '::tip' $ hg show stack o baa4 new 2 / (2 commits ahead) : : (stack head) : @ eaff draft 2 : o 2b21 draft 1 :/ (stack base) o b66b base If rebase is available, we show a hint how to rebase to that head $ hg --config extensions.rebase= show stack o baa4 new 2 / (2 commits ahead; hg rebase --source 2b21 --dest baa4) : : (stack head) : @ eaff draft 2 : o 2b21 draft 1 :/ (stack base) o b66b base Similar tests but for multiple heads $ hg -q up 0 $ echo h2 > foo $ hg -q commit -m 'new head 2' $ hg phase --public -r . $ hg -q up 2 $ hg show stack o baa4 new 2 / (2 commits ahead) : o 9a84 new head 2 :/ (1 commits ahead) : : (stack head) : @ eaff draft 2 : o 2b21 draft 1 :/ (stack base) o b66b base $ hg --config extensions.rebase= show stack o baa4 new 2 / (2 commits ahead; hg rebase --source 2b21 --dest baa4) : o 9a84 new head 2 :/ (1 commits ahead; hg rebase --source 2b21 --dest 9a84) : : (stack head) : @ eaff draft 2 : o 2b21 draft 1 :/ (stack base) o b66b base