Mercurial > hg
view tests/test-rebase-pull.t @ 35098:66c5a8cf2868
lfs: import the Facebook git-lfs client extension
The purpose of this is the same as the built-in largefiles extension- to handle
huge files outside of the normal storage system, generally to keep the amount of
data cloned to a lower amount. There are several benefits of implementing the
git-lfs protocol, instead of using the largefiles extension:
- Bitbucket and Github support (and probably wider support in 3rd party
hosting sites in general). [1][2]
- The number of hg internals monkey patched are several orders of magnitude
lower, so it will be easier to reason about and maintain. Future commands
will likely just work, without requiring various wrappers.
- The "standin" files are only written to the filelog, not the disk. That
should avoid weird edge cases where the largefile and standin files get out
of sync. [3] It also avoids the occasional printing of the "hidden" standin
file in various messages.
- Filesets like size() will work, even if the file isn't present. (It always
says 41 bytes for largefiles, whether present or not.)
The only place that I see where largefiles comes out on top is that it works
with `hg serve` for simple sharing, without external infrastructure. Getting
lfs-test-server working was a hassle, and took awhile to figure out. Maybe we
can do something to make it work in the future.
Long term, I expect that this will be highly preferred over largefiles. But if
we are to recommend this to largefile users, there are some UI issues to
bikeshed. Until they are resolved, I've marked this experimental, and am not
putting a pointer to this in the largefiles help. The (non exhaustive) list of
issues I've seen so far are:
- It isn't sufficient to just enable the largefiles extension- you have to
explicitly add a file with --large before it will pay attention to the
configured sizes and patterns on future adds. The justification being that
once you use it, you're stuck with it. I've seen people confused by this,
and haven't liked it myself. But it's also saved me a few times. Should we
do something like have a specific enabling config setting that must be set
in the local repo config, so that enabling this extension in the user or
system hgrc doesn't silently start storing lfs files?
- The largefiles extension adds a repo requirement when the first largefile is
committed, so that the extension must always be enabled in the future. This
extension is not doing that, and since I only enabled it locally to avoid
infecting other repos, I got a cryptic error about missing flag processors
when I cloned. Is there no repo requirement due to shallow/narrow clone
considerations (or other future advanced things)?
- In the (small amount of) reading I've done about the git implementation, it
seems that the files and sizes are stored in a tracked .gitattributes file.
I think a tracked file for this would be extremely useful for consistency
across developers, but this kind of touches on the tracked hgrc file
proposal a few months back.
- The git client can specify file patterns, not just sizes.
- The largefiles extension has a cache directory in the local repo, but also a
system wide one. We should probably implement a system wide cache too, so
that multiple clones don't have to refetch the files from the server.
- Jun mentioned other missing features, like SSH authentication, gc, etc.
The code corresponds to c0492b73c7ef in hg-experimental. [4] The only tweaks
are to load the extension in the tests with 'lfs=' instead of
'lfs=$TESTDIR/../hgext3rd/lfs', change the import in the *.py test to hgext
(from hgext3rd), add the 'testedwith' declaration, and mark it experimental for
now. The infinite-push, p4fastimport, and remotefilelog tests were left behind.
The devel-warnings for unregistered config options are not corrected yet, nor
are the import check warnings.
[1] https://www.mercurial-scm.org/pipermail/mercurial/2017-November/050699.html
[2] https://bitbucket.org/site/master/issues/3843/largefiles-support-bb-3903
[3] https://bz.mercurial-scm.org/show_bug.cgi?id=5738
[4] https://bitbucket.org/facebook/hg-experimental
author | Matt Harbison <matt_harbison@yahoo.com> |
---|---|
date | Tue, 14 Nov 2017 00:06:23 -0500 |
parents | eb586ed5d8ce |
children | 469b06b4c3ca |
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$ cat >> $HGRCPATH <<EOF > [extensions] > rebase= > histedit= > > [alias] > tglog = log -G --template "{rev}: '{desc}' {branches}\n" > EOF $ hg init a $ cd a $ echo C1 > C1 $ hg ci -Am C1 adding C1 $ echo C2 > C2 $ hg ci -Am C2 adding C2 $ cd .. $ hg clone a b updating to branch default 2 files updated, 0 files merged, 0 files removed, 0 files unresolved $ hg clone a c updating to branch default 2 files updated, 0 files merged, 0 files removed, 0 files unresolved $ cd b $ echo L1 > L1 $ hg ci -Am L1 adding L1 $ cd ../a $ echo R1 > R1 $ hg ci -Am R1 adding R1 $ cd ../b Now b has one revision to be pulled from a: $ hg pull --rebase pulling from $TESTTMP/a (glob) searching for changes adding changesets adding manifests adding file changes added 1 changesets with 1 changes to 1 files (+1 heads) new changesets 77ae9631bcca rebasing 2:ff8d69a621f9 "L1" saved backup bundle to $TESTTMP/b/.hg/strip-backup/ff8d69a621f9-160fa373-rebase.hg (glob) $ hg tglog @ 3: 'L1' | o 2: 'R1' | o 1: 'C2' | o 0: 'C1' Re-run: $ hg pull --rebase pulling from $TESTTMP/a (glob) searching for changes no changes found Abort pull early if working dir is not clean: $ echo L1-mod > L1 $ hg pull --rebase abort: uncommitted changes (cannot pull with rebase: please commit or shelve your changes first) [255] $ hg update --clean --quiet Abort pull early if another operation (histedit) is in progress: $ hg histedit . -q --commands - << EOF > edit d80cc2da061e histedit: generate unfinished state > EOF Editing (d80cc2da061e), you may commit or record as needed now. (hg histedit --continue to resume) [1] $ hg pull --rebase abort: histedit in progress (use 'hg histedit --continue' or 'hg histedit --abort') [255] $ hg histedit --abort --quiet Abort pull early with pending uncommitted merge: $ cd .. $ hg clone --noupdate c d $ cd d $ hg tglog o 1: 'C2' | o 0: 'C1' $ hg update --quiet 0 $ echo M1 > M1 $ hg commit --quiet -Am M1 $ hg update --quiet 1 $ hg merge 2 1 files updated, 0 files merged, 0 files removed, 0 files unresolved (branch merge, don't forget to commit) $ hg pull --rebase abort: outstanding uncommitted merge (cannot pull with rebase: please commit or shelve your changes first) [255] $ hg update --clean --quiet Abort pull early with unclean subrepo: $ echo s = s > .hgsub $ hg add .hgsub $ hg init s $ hg commit -m "generated a subrepo" $ echo a > s/a $ hg -R s add s/a $ hg pull --rebase abort: uncommitted changes in subrepository "s" (cannot pull with rebase: please commit or shelve your changes first) [255] Invoke pull --rebase and nothing to rebase: $ cd ../c $ hg book norebase $ hg pull --rebase pulling from $TESTTMP/a (glob) searching for changes adding changesets adding manifests adding file changes added 1 changesets with 1 changes to 1 files new changesets 77ae9631bcca nothing to rebase - updating instead 1 files updated, 0 files merged, 0 files removed, 0 files unresolved updating bookmark norebase $ hg tglog -l 1 @ 2: 'R1' | ~ pull --rebase --update should ignore --update: $ hg pull --rebase --update pulling from $TESTTMP/a (glob) searching for changes no changes found pull --rebase doesn't update if nothing has been pulled: $ hg up -q 1 $ hg pull --rebase pulling from $TESTTMP/a (glob) searching for changes no changes found $ hg tglog -l 1 o 2: 'R1' | ~ $ cd .. pull --rebase works when a specific revision is pulled (issue3619) $ cd a $ hg tglog @ 2: 'R1' | o 1: 'C2' | o 0: 'C1' $ echo R2 > R2 $ hg ci -Am R2 adding R2 $ echo R3 > R3 $ hg ci -Am R3 adding R3 $ cd ../c $ hg tglog o 2: 'R1' | @ 1: 'C2' | o 0: 'C1' $ echo L1 > L1 $ hg ci -Am L1 adding L1 created new head $ hg pull --rev tip --rebase pulling from $TESTTMP/a (glob) searching for changes adding changesets adding manifests adding file changes added 2 changesets with 2 changes to 2 files new changesets 31cd3a05214e:770a61882ace rebasing 3:ff8d69a621f9 "L1" saved backup bundle to $TESTTMP/c/.hg/strip-backup/ff8d69a621f9-160fa373-rebase.hg (glob) $ hg tglog @ 5: 'L1' | o 4: 'R3' | o 3: 'R2' | o 2: 'R1' | o 1: 'C2' | o 0: 'C1' pull --rebase works with bundle2 turned on $ cd ../a $ echo R4 > R4 $ hg ci -Am R4 adding R4 $ hg tglog @ 5: 'R4' | o 4: 'R3' | o 3: 'R2' | o 2: 'R1' | o 1: 'C2' | o 0: 'C1' $ cd ../c $ hg pull --rebase pulling from $TESTTMP/a (glob) searching for changes adding changesets adding manifests adding file changes added 1 changesets with 1 changes to 1 files (+1 heads) new changesets 00e3b7781125 rebasing 5:518d153c0ba3 "L1" saved backup bundle to $TESTTMP/c/.hg/strip-backup/518d153c0ba3-73407f14-rebase.hg (glob) $ hg tglog @ 6: 'L1' | o 5: 'R4' | o 4: 'R3' | o 3: 'R2' | o 2: 'R1' | o 1: 'C2' | o 0: 'C1' pull --rebase only update if there is nothing to rebase $ cd ../a $ echo R5 > R5 $ hg ci -Am R5 adding R5 $ hg tglog @ 6: 'R5' | o 5: 'R4' | o 4: 'R3' | o 3: 'R2' | o 2: 'R1' | o 1: 'C2' | o 0: 'C1' $ cd ../c $ echo L2 > L2 $ hg ci -Am L2 adding L2 $ hg up 'desc(L1)' 0 files updated, 0 files merged, 1 files removed, 0 files unresolved $ hg pull --rebase pulling from $TESTTMP/a (glob) searching for changes adding changesets adding manifests adding file changes added 1 changesets with 1 changes to 1 files (+1 heads) new changesets 88dd24261747 rebasing 6:0d0727eb7ce0 "L1" rebasing 7:c1f58876e3bf "L2" saved backup bundle to $TESTTMP/c/.hg/strip-backup/0d0727eb7ce0-ef61ccb2-rebase.hg (glob) $ hg tglog o 8: 'L2' | @ 7: 'L1' | o 6: 'R5' | o 5: 'R4' | o 4: 'R3' | o 3: 'R2' | o 2: 'R1' | o 1: 'C2' | o 0: 'C1' pull --rebase update (no rebase) use proper update: - warn about other head. $ cd ../a $ echo R6 > R6 $ hg ci -Am R6 adding R6 $ cd ../c $ hg up 'desc(R5)' 0 files updated, 0 files merged, 1 files removed, 0 files unresolved $ hg pull --rebase pulling from $TESTTMP/a (glob) searching for changes adding changesets adding manifests adding file changes added 1 changesets with 1 changes to 1 files (+1 heads) new changesets 65bc164c1d9b nothing to rebase - updating instead 1 files updated, 0 files merged, 0 files removed, 0 files unresolved updated to "65bc164c1d9b: R6" 1 other heads for branch "default" $ hg tglog @ 9: 'R6' | | o 8: 'L2' | | | o 7: 'L1' |/ o 6: 'R5' | o 5: 'R4' | o 4: 'R3' | o 3: 'R2' | o 2: 'R1' | o 1: 'C2' | o 0: 'C1' Multiple pre-existing heads on the branch ----------------------------------------- Pull bring content, but nothing on the current branch, we should not consider pre-existing heads. $ cd ../a $ hg branch unrelatedbranch marked working directory as branch unrelatedbranch (branches are permanent and global, did you want a bookmark?) $ echo B1 > B1 $ hg commit -Am B1 adding B1 $ cd ../c $ hg up 'desc(L2)' 2 files updated, 0 files merged, 1 files removed, 0 files unresolved $ hg pull --rebase pulling from $TESTTMP/a (glob) searching for changes adding changesets adding manifests adding file changes added 1 changesets with 1 changes to 1 files new changesets 39c381359968 nothing to rebase There is two local heads and we pull a third one. The second local head should not confuse the `hg pull rebase`. $ hg up 'desc(R6)' 1 files updated, 0 files merged, 2 files removed, 0 files unresolved $ echo M1 > M1 $ hg commit -Am M1 adding M1 $ cd ../a $ hg up 'desc(R6)' 0 files updated, 0 files merged, 1 files removed, 0 files unresolved $ echo R7 > R7 $ hg commit -Am R7 adding R7 $ cd ../c $ hg up 'desc(L2)' 2 files updated, 0 files merged, 2 files removed, 0 files unresolved $ hg pull --rebase pulling from $TESTTMP/a (glob) searching for changes adding changesets adding manifests adding file changes added 1 changesets with 1 changes to 1 files (+1 heads) new changesets f7d3e42052f9 rebasing 7:864e0a2d2614 "L1" rebasing 8:6dc0ea5dcf55 "L2" saved backup bundle to $TESTTMP/c/.hg/strip-backup/864e0a2d2614-2f72c89c-rebase.hg (glob) $ hg tglog @ 12: 'L2' | o 11: 'L1' | o 10: 'R7' | | o 9: 'M1' |/ | o 8: 'B1' unrelatedbranch |/ o 7: 'R6' | o 6: 'R5' | o 5: 'R4' | o 4: 'R3' | o 3: 'R2' | o 2: 'R1' | o 1: 'C2' | o 0: 'C1'