Mercurial > hg
view tests/test-merge-default.t @ 49672:e92de86cf4f8
emitrevision: consider ancestors revision to emit as available base
This should make more delta base valid. This notably affects:
* case where we skipped some parent with empty delta to directly delta against
an ancestors
* case where an intermediate snapshots is stored.
This change means we could sent largish intermediate snapshots over the wire.
However this is actually a sub goal here. Sending snapshots over the wire means
the client have a high odd of simply storing the pre-computed delta instead of
doing a lengthy process that will… end up doing the same intermediate snapshot.
In addition the overall size of snapshot (or any level) is "only" some or the
overall delta size. (0.17% for my mercurial clone, 20% for my clone of Mozilla
try). So Sending them other the wire is unlikely to change large impact on the
bandwidth used.
If we decide that minimising the bandwidth is an explicit goal, we should
introduce new logic to filter-out snapshot as delta. The current code has no
notion explicite of snapshot so far, they just tended to fall into the wobbly
filtering options.
In some cases, this patch can yield large improvement to the bundling time:
### data-env-vars.name = mozilla-try-2019-02-18-zstd-sparse-revlog
# benchmark.name = perf-bundle
# benchmark.variants.revs = last-100000
before: 68.787066 seconds
after: 47.552677 seconds (-30.87%)
That translate to large improvement to the pull time :
### data-env-vars.name = mozilla-try-2019-02-18-zstd-sparse-revlog
# benchmark.name = pull
# benchmark.variants.issue6528 = disabled
# benchmark.variants.revs = last-100000
before: 142.186625 seconds
after: 75.897745 seconds (-46.62%)
No significant negative impact have been observed.
author | Pierre-Yves David <pierre-yves.david@octobus.net> |
---|---|
date | Sat, 12 Nov 2022 00:18:41 +0100 |
parents | 55c6ebd11cb9 |
children |
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$ hg init repo $ cd repo $ echo a > a $ hg commit -A -ma adding a $ echo b >> a $ hg commit -mb $ echo c >> a $ hg commit -mc $ hg up 1 1 files updated, 0 files merged, 0 files removed, 0 files unresolved $ echo d >> a $ hg commit -md created new head $ hg up 1 1 files updated, 0 files merged, 0 files removed, 0 files unresolved $ echo e >> a $ hg commit -me created new head $ hg up 1 1 files updated, 0 files merged, 0 files removed, 0 files unresolved Should fail because not at a head: $ hg merge abort: working directory not at a head revision (use 'hg update' or merge with an explicit revision) [255] $ hg up 1 files updated, 0 files merged, 0 files removed, 0 files unresolved updated to "f25cbe84d8b3: e" 2 other heads for branch "default" Should fail because > 2 heads: $ HGMERGE=internal:other; export HGMERGE $ hg merge abort: branch 'default' has 3 heads - please merge with an explicit rev (run 'hg heads .' to see heads, specify rev with -r) [255] Should succeed (we're specifying commands.merge.require-rev=True just to test that it allows merge to succeed if we specify a revision): $ hg merge 2 --config commands.merge.require-rev=True 0 files updated, 1 files merged, 0 files removed, 0 files unresolved (branch merge, don't forget to commit) $ hg id -Tjson [ { "bookmarks": [], "branch": "default", "dirty": "+", "id": "f25cbe84d8b320e298e7703f18a25a3959518c23+2d95304fed5d89bc9d70b2a0d02f0d567469c3ab+", "node": "ffffffffffffffffffffffffffffffffffffffff", "parents": ["f25cbe84d8b320e298e7703f18a25a3959518c23", "2d95304fed5d89bc9d70b2a0d02f0d567469c3ab"], "tags": ["tip"] } ] $ hg commit -mm1 Should fail because we didn't specify a revision (even though it would have succeeded without this): $ hg merge --config commands.merge.require-rev=True abort: configuration requires specifying revision to merge with [10] Should succeed - 2 heads: $ hg merge -P changeset: 3:ea9ff125ff88 parent: 1:1846eede8b68 user: test date: Thu Jan 01 00:00:00 1970 +0000 summary: d $ hg merge 0 files updated, 1 files merged, 0 files removed, 0 files unresolved (branch merge, don't forget to commit) $ hg commit -mm2 $ hg id -r 1 -Tjson [ { "bookmarks": [], "branch": "default", "id": "1846eede8b6886d8cc8a88c96a687b7fe8f3b9d1", "node": "1846eede8b6886d8cc8a88c96a687b7fe8f3b9d1", "tags": [] } ] Should fail because we didn't specify a revision (even though it would have failed without this due to being on tip, but this check comes first): $ hg merge --config commands.merge.require-rev=True abort: configuration requires specifying revision to merge with [10] Should fail because at tip: $ hg merge abort: nothing to merge [255] $ hg up 0 1 files updated, 0 files merged, 0 files removed, 0 files unresolved Should fail because there is only one head: $ hg merge abort: nothing to merge (use 'hg update' instead) [255] $ hg up 3 1 files updated, 0 files merged, 0 files removed, 0 files unresolved $ echo f >> a $ hg branch foobranch marked working directory as branch foobranch (branches are permanent and global, did you want a bookmark?) $ hg commit -mf Should fail because merge with other branch: $ hg merge abort: branch 'foobranch' has one head - please merge with an explicit rev (run 'hg heads' to see all heads, specify rev with -r) [255] Test for issue2043: ensure that 'merge -P' shows ancestors of 6 that are not ancestors of 7, regardless of where their common ancestors are. Merge preview not affected by common ancestor: $ hg up -q 7 $ hg merge -q -P 6 2:2d95304fed5d 4:f25cbe84d8b3 5:a431fabd6039 6:e88e33f3bf62 Test experimental destination revset $ hg log -r '_destmerge()' abort: branch 'foobranch' has one head - please merge with an explicit rev (run 'hg heads' to see all heads, specify rev with -r) [255] (on a branch with a two heads) $ hg up 5 1 files updated, 0 files merged, 0 files removed, 0 files unresolved $ echo f >> a $ hg commit -mf created new head $ hg log -r '_destmerge()' changeset: 6:e88e33f3bf62 parent: 5:a431fabd6039 parent: 3:ea9ff125ff88 user: test date: Thu Jan 01 00:00:00 1970 +0000 summary: m2 (from the other head) $ hg log -r '_destmerge(e88e33f3bf62)' changeset: 8:b613918999e2 tag: tip parent: 5:a431fabd6039 user: test date: Thu Jan 01 00:00:00 1970 +0000 summary: f (from unrelated branch) $ hg log -r '_destmerge(foobranch)' abort: branch 'foobranch' has one head - please merge with an explicit rev (run 'hg heads' to see all heads, specify rev with -r) [255]