Mercurial > hg
view tests/test-rebase-rename.t @ 28443:49d65663d7e4
fsmonitor: hook up state-enter, state-leave signals
Keeping the codebase in sync with upstream:
Watchman 4.4 introduced an advanced settling feature that allows publishing
tools to notify subscribing tools of the boundaries for important filesystem
operations.
https://facebook.github.io/watchman/docs/cmd/subscribe.html#advanced-settling
has more information about how this feature works.
This diff connects a signal that we're calling `hg.update` to the mercurial
update function so that mercurial can indirectly notify tools (such as IDEs or
build machinery) when it is changing the working copy. This will allow those
tools to pause their normal actions as the files are changing and defer them
until the end of the operation.
In addition to sending the enter/leave signals for the state, we are able to
publish useful metadata along the same channel. In this case we are passing
the following pieces of information:
1. destination revision hash
2. An estimate of the distance between the current state and the target state
3. A success indicator.
4. Whether it is a partial update
The distance is estimate may be useful to tools that wish to change their
strategy after the update has complete. For example, a large update may be
efficient to deal with by walking some internal state in the subscriber rather
than feeding every individual file notification through its normal (small)
delta mechanism.
We estimate the distance by comparing the repository revision number. In some
cases we cannot come up with a number so we report 0. This is ok; we're
offering this for informational purposes only and don't guarantee its accuracy.
The success indicator is only really meaningful when we generate the
state-leave notification; it indicates the overall success of the update.
author | Martijn Pieters <mjpieters@fb.com> |
---|---|
date | Thu, 10 Mar 2016 16:04:09 +0000 |
parents | d1561a422748 |
children | d7af9b4ae7dd |
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$ cat >> $HGRCPATH <<EOF > [extensions] > rebase= > > [alias] > tlog = log --template "{rev}: '{desc}' {branches}\n" > tglog = tlog --graph > EOF $ hg init a $ cd a $ mkdir d $ echo a > a $ hg ci -Am A adding a $ echo b > d/b $ hg ci -Am B adding d/b $ hg mv d d-renamed moving d/b to d-renamed/b (glob) $ hg ci -m 'rename B' $ hg up -q -C 1 $ hg mv a a-renamed $ echo x > d/x $ hg add d/x $ hg ci -m 'rename A' created new head $ hg tglog @ 3: 'rename A' | | o 2: 'rename B' |/ o 1: 'B' | o 0: 'A' Rename is tracked: $ hg tlog -p --git -r tip 3: 'rename A' diff --git a/a b/a-renamed rename from a rename to a-renamed diff --git a/d/x b/d/x new file mode 100644 --- /dev/null +++ b/d/x @@ -0,0 +1,1 @@ +x Rebase the revision containing the rename: $ hg rebase -s 3 -d 2 rebasing 3:73a3ee40125d "rename A" (tip) saved backup bundle to $TESTTMP/a/.hg/strip-backup/73a3ee40125d-1d78ebcf-backup.hg (glob) $ hg tglog @ 3: 'rename A' | o 2: 'rename B' | o 1: 'B' | o 0: 'A' Rename is not lost: $ hg tlog -p --git -r tip 3: 'rename A' diff --git a/a b/a-renamed rename from a rename to a-renamed diff --git a/d-renamed/x b/d-renamed/x new file mode 100644 --- /dev/null +++ b/d-renamed/x @@ -0,0 +1,1 @@ +x Rebased revision does not contain information about b (issue3739) $ hg log -r 3 --debug changeset: 3:032a9b75e83bff1dcfb6cbfa4ef50a704bf1b569 tag: tip phase: draft parent: 2:220d0626d185f372d9d8f69d9c73b0811d7725f7 parent: -1:0000000000000000000000000000000000000000 manifest: 3:035d66b27a1b06b2d12b46d41a39adb7a200c370 user: test date: Thu Jan 01 00:00:00 1970 +0000 files+: a-renamed d-renamed/x files-: a extra: branch=default extra: rebase_source=73a3ee40125d6f0f347082e5831ceccb3f005f8a description: rename A $ cd .. $ hg init b $ cd b $ echo a > a $ hg ci -Am A adding a $ echo b > b $ hg ci -Am B adding b $ hg cp b b-copied $ hg ci -Am 'copy B' $ hg up -q -C 1 $ hg cp a a-copied $ hg ci -m 'copy A' created new head $ hg tglog @ 3: 'copy A' | | o 2: 'copy B' |/ o 1: 'B' | o 0: 'A' Copy is tracked: $ hg tlog -p --git -r tip 3: 'copy A' diff --git a/a b/a-copied copy from a copy to a-copied Rebase the revision containing the copy: $ hg rebase -s 3 -d 2 rebasing 3:0a8162ff18a8 "copy A" (tip) saved backup bundle to $TESTTMP/b/.hg/strip-backup/0a8162ff18a8-dd06302a-backup.hg (glob) $ hg tglog @ 3: 'copy A' | o 2: 'copy B' | o 1: 'B' | o 0: 'A' Copy is not lost: $ hg tlog -p --git -r tip 3: 'copy A' diff --git a/a b/a-copied copy from a copy to a-copied Rebased revision does not contain information about b (issue3739) $ hg log -r 3 --debug changeset: 3:98f6e6dbf45ab54079c2237fbd11066a5c41a11d tag: tip phase: draft parent: 2:39e588434882ff77d01229d169cdc77f29e8855e parent: -1:0000000000000000000000000000000000000000 manifest: 3:2232f329d66fffe3930d43479ae624f66322b04d user: test date: Thu Jan 01 00:00:00 1970 +0000 files+: a-copied extra: branch=default extra: rebase_source=0a8162ff18a8900df8df8ef7ac0046955205613e description: copy A $ cd .. Test rebase across repeating renames: $ hg init repo $ cd repo $ echo testing > file1.txt $ hg add file1.txt $ hg ci -m "Adding file1" $ hg rename file1.txt file2.txt $ hg ci -m "Rename file1 to file2" $ echo Unrelated change > unrelated.txt $ hg add unrelated.txt $ hg ci -m "Unrelated change" $ hg rename file2.txt file1.txt $ hg ci -m "Rename file2 back to file1" $ hg update -r -2 1 files updated, 0 files merged, 1 files removed, 0 files unresolved $ echo Another unrelated change >> unrelated.txt $ hg ci -m "Another unrelated change" created new head $ hg tglog @ 4: 'Another unrelated change' | | o 3: 'Rename file2 back to file1' |/ o 2: 'Unrelated change' | o 1: 'Rename file1 to file2' | o 0: 'Adding file1' $ hg rebase -s 4 -d 3 rebasing 4:b918d683b091 "Another unrelated change" (tip) saved backup bundle to $TESTTMP/repo/.hg/strip-backup/b918d683b091-3024bc57-backup.hg (glob) $ hg diff --stat -c . unrelated.txt | 1 + 1 files changed, 1 insertions(+), 0 deletions(-) $ cd .. Verify that copies get preserved (issue4192). $ hg init copy-gets-preserved $ cd copy-gets-preserved $ echo a > a $ hg add a $ hg commit --message "File a created" $ hg copy a b $ echo b > b $ hg commit --message "File b created as copy of a and modified" $ hg copy b c $ echo c > c $ hg commit --message "File c created as copy of b and modified" $ hg copy c d $ echo d > d $ hg commit --message "File d created as copy of c and modified" Note that there are four entries in the log for d $ hg tglog --follow d @ 3: 'File d created as copy of c and modified' | o 2: 'File c created as copy of b and modified' | o 1: 'File b created as copy of a and modified' | o 0: 'File a created' Update back to before we performed copies, and inject an unrelated change. $ hg update 0 0 files updated, 0 files merged, 3 files removed, 0 files unresolved $ echo unrelated > unrelated $ hg add unrelated $ hg commit --message "Unrelated file created" created new head $ hg update 4 0 files updated, 0 files merged, 0 files removed, 0 files unresolved Rebase the copies on top of the unrelated change. $ hg rebase --source 1 --dest 4 rebasing 1:79d255d24ad2 "File b created as copy of a and modified" rebasing 2:327f772bc074 "File c created as copy of b and modified" rebasing 3:421b7e82bb85 "File d created as copy of c and modified" saved backup bundle to $TESTTMP/copy-gets-preserved/.hg/strip-backup/79d255d24ad2-a2265555-backup.hg (glob) $ hg update 4 3 files updated, 0 files merged, 0 files removed, 0 files unresolved There should still be four entries in the log for d $ hg tglog --follow d @ 4: 'File d created as copy of c and modified' | o 3: 'File c created as copy of b and modified' | o 2: 'File b created as copy of a and modified' | o 0: 'File a created' Same steps as above, but with --collapse on rebase to make sure the copy records collapse correctly. $ hg co 1 0 files updated, 0 files merged, 3 files removed, 0 files unresolved $ echo more >> unrelated $ hg ci -m 'unrelated commit is unrelated' created new head $ hg rebase -s 2 --dest 5 --collapse rebasing 2:68bf06433839 "File b created as copy of a and modified" rebasing 3:af74b229bc02 "File c created as copy of b and modified" merging b and c to c rebasing 4:dbb9ba033561 "File d created as copy of c and modified" merging c and d to d saved backup bundle to $TESTTMP/copy-gets-preserved/.hg/strip-backup/68bf06433839-dde37595-backup.hg (glob) $ hg co tip 3 files updated, 0 files merged, 0 files removed, 0 files unresolved This should show both revision 3 and 0 since 'd' was transitively a copy of 'a'. $ hg tglog --follow d @ 3: 'Collapsed revision | * File b created as copy of a and modified | * File c created as copy of b and modified | * File d created as copy of c and modified' o 0: 'File a created' $ cd ..