Mercurial > hg
view tests/test-rebase-partial.t @ 42619:20d0e59be79b
tests: show the files fields of changelogs for many merges
I don't think there's coverage for many of the subtle cases, and I
found it hard to understand what the code is doing by reading it. The
test takes 40s to run on a laptop, or 9s with --chg.
I have yet to find a description of what the files field is supposed
to be for merges. I thought it could be one of:
1. the files added/modified/removed relative to p1 (wouldn't seem
useful, but `hg diff -c -r mergerev` has this behavior)
2. the files with filelog nodes not in either parent (i.e., what is
needed to create a bundle out of a commit)
3. the files added/removed/modified files by merge itself [1]
It's clearly not 1, because file contents merges are symmetric. It's
clearly not 2 because removed files and exec bit changes are
listed. It's also not 3 but I think it's intended to be 3 and the
differences are bugs.
Assuming 3, the test shows that, for merges, the list of files both
overapproximates and underapproximates. All the cases involve file
changes not in the filelog but in the manifest (existence of file
at revision, exec bit and file vs symlink).
I didn't look at all underapproximations, but they looked minor. The
two overapproximations are problematic though because they both cause
potentially long lists of files when merging cleanly.
[1] even what it means for the merge commit itself to change a file is
not completely trivial. A file in the merge being the same as in one
of the parent is too lax as it would consider that merges change
nothing when they revert all the changes done on one side. The
criteria used in the test and in the next commit for "merge didn't
touch a file" is:
- the parents and the merge all have the same file
- or, one parent didn't touch the file and the other parent contains
the same file as the merge
Differential Revision: https://phab.mercurial-scm.org/D6612
author | Valentin Gatien-Baron <valentin.gatienbaron@gmail.com> |
---|---|
date | Tue, 02 Jul 2019 12:55:51 -0400 |
parents | 5abc47d4ca6b |
children | dc5e5577af39 |
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Tests rebasing with part of the rebase set already in the destination (issue5422) $ cat >> $HGRCPATH <<EOF > [extensions] > rebase= > drawdag=$TESTDIR/drawdag.py > > [experimental] > evolution.createmarkers=True > evolution.allowunstable=True > > [alias] > tglog = log -G --template "{rev}: {node|short} {desc}" > EOF $ rebasewithdag() { > N=`"$PYTHON" -c "print($N+1)"` > hg init repo$N && cd repo$N > hg debugdrawdag > hg rebase "$@" > _rebasetmp > r=$? > grep -v 'saved backup bundle' _rebasetmp > [ $r -eq 0 ] && hg tglog > cd .. > return $r > } Rebase two commits, of which one is already in the right place $ rebasewithdag -r C+D -d B <<EOF > C > | > B D > |/ > A > EOF rebasing 2:b18e25de2cf5 "D" (D) already rebased 3:26805aba1e60 "C" (C tip) o 4: fe3b4c6498fa D | | o 3: 26805aba1e60 C |/ | x 2: b18e25de2cf5 D | | o | 1: 112478962961 B |/ o 0: 426bada5c675 A Can collapse commits even if one is already in the right place $ rebasewithdag --collapse -r C+D -d B <<EOF > C > | > B D > |/ > A > EOF rebasing 2:b18e25de2cf5 "D" (D) rebasing 3:26805aba1e60 "C" (C tip) o 4: a2493f4ace65 Collapsed revision | * D | * C | x 3: 26805aba1e60 C |/ | x 2: b18e25de2cf5 D | | o | 1: 112478962961 B |/ o 0: 426bada5c675 A Abort doesn't lose the commits that were already in the right place $ hg init abort $ cd abort $ hg debugdrawdag <<EOF > C > | > B D # B/file = B > |/ # D/file = D > A > EOF $ hg rebase -r C+D -d B rebasing 2:ef8c0fe0897b "D" (D) merging file warning: conflicts while merging file! (edit, then use 'hg resolve --mark') unresolved conflicts (see hg resolve, then hg rebase --continue) [1] $ hg rebase --abort rebase aborted $ hg tglog o 3: 79f6d6ab7b14 C | | o 2: ef8c0fe0897b D | | o | 1: 594087dbaf71 B |/ o 0: 426bada5c675 A $ cd .. Rebase with "holes". The commits after the hole should end up on the parent of the hole (B below), not on top of the destination (A). $ rebasewithdag -r B+D -d A <<EOF > D > | > C > | > B > | > A > EOF already rebased 1:112478962961 "B" (B) rebasing 3:f585351a92f8 "D" (D tip) o 4: 1e6da8103bc7 D | | x 3: f585351a92f8 D | | | o 2: 26805aba1e60 C |/ o 1: 112478962961 B | o 0: 426bada5c675 A