Mercurial > hg
view tests/test-pathconflicts-basic.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 | 0b46e1aa7760 |
children | dc00324e80f4 |
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Path conflict checking is currently disabled by default because of issue5716. Turn it on for this test. $ cat >> $HGRCPATH << EOF > [experimental] > merge.checkpathconflicts=True > EOF $ hg init repo $ cd repo $ echo base > base $ hg add base $ hg commit -m "base" $ hg bookmark -i base $ echo 1 > a $ hg add a $ hg commit -m "file" $ hg bookmark -i file $ echo 2 > a $ hg commit -m "file2" $ hg bookmark -i file2 $ hg up -q 0 $ mkdir a $ echo 2 > a/b $ hg add a/b $ hg commit -m "dir" created new head $ hg bookmark -i dir Basic merge - local file conflicts with remote directory $ hg up -q file $ hg bookmark -i $ hg merge --verbose dir resolving manifests a: path conflict - a file or link has the same name as a directory the local file has been renamed to a~853701544ac3 resolve manually then use 'hg resolve --mark a' moving a to a~853701544ac3 getting a/b 1 files updated, 0 files merged, 0 files removed, 1 files unresolved use 'hg resolve' to retry unresolved file merges or 'hg merge --abort' to abandon [1] $ hg update --clean . 1 files updated, 0 files merged, 1 files removed, 0 files unresolved $ rm a~853701544ac3 Basic update - local directory conflicts with remote file $ hg up -q 0 $ mkdir a $ echo 3 > a/b $ hg up file a: untracked directory conflicts with file abort: untracked files in working directory differ from files in requested revision [255] $ hg up --clean file 1 files updated, 0 files merged, 0 files removed, 0 files unresolved (activating bookmark file) Repo state is ok $ hg sum parent: 1:853701544ac3 file branch: default bookmarks: *file commit: (clean) update: 2 new changesets (update) phases: 4 draft Basic update - untracked file conflicts with remote directory $ hg up -q 0 $ echo untracked > a $ hg up --config merge.checkunknown=warn dir a: replacing untracked file 1 files updated, 0 files merged, 0 files removed, 0 files unresolved (activating bookmark dir) $ cat a.orig untracked $ rm -f a.orig Basic clean update - local directory conflicts with changed remote file $ hg up -q file $ rm a $ mkdir a $ echo 4 > a/b $ hg up file2 abort: *: *$TESTTMP/repo/a* (glob) [255] $ hg up --clean file2 1 files updated, 0 files merged, 0 files removed, 0 files unresolved (activating bookmark file2) Repo state is ok $ hg sum parent: 2:f64e09fac717 file2 branch: default bookmarks: *file2 commit: (clean) update: 1 new changesets, 2 branch heads (merge) phases: 4 draft