outgoing: rework the handling of the `missingroots` case to be faster
The previous implementation was slow, to the point it was taking a significant
amount of `hg bundle --type none-streamv2` call. We rework the code to compute
the same value much faster, making the operation disappear from the `hg bundle
--type none-streamv2` profile. Someone would remark that producing a streamclone
does not requires an `outgoing` object. However that is a matter for another
day. There is other user of `missingroots` (non stream `hg bundle` call for
example), and they will also benefit from this rework.
We implement an old TODO in the process, directly computing the missing and
common attribute as we have most element at hand already.
### benchmark.name = hg.command.bundle
# bin-env-vars.hg.flavor = default
# bin-env-vars.hg.py-re2-module = default
# benchmark.variants.revs = all
# benchmark.variants.type = none-streamv2
## data-env-vars.name = heptapod-public-2024-03-25-zstd-sparse-revlog
before: 7.750458
after: 6.665565 (-14.00%, -1.08)
## data-env-vars.name = mercurial-public-2024-03-22-zstd-sparse-revlog
before: 0.700229
after: 0.496050 (-29.16%, -0.20)
## data-env-vars.name = mozilla-try-2023-03-22-zstd-sparse-revlog
before: 346.508952
after: 316.749699 (-8.59%, -29.76)
## data-env-vars.name = pypy-2024-03-22-zstd-sparse-revlog
before: 3.401700
after: 2.915810 (-14.28%, -0.49)
## data-env-vars.name = tryton-public-2024-03-22-zstd-sparse-revlog
before: 1.870798
after: 1.461583 (-21.87%, -0.41)
note: this whole `missingroots` of outgoing has a limited number of callers and
could likely be replace by something simpler (like taking an explicit
"missing_revs" set for example). However this is a wider change and we focus on
a small impact, quick rework that does not change the API for now.
#testcases flat tree
#testcases safe normal
#if safe
$ echo "[format]" >> $HGRCPATH
$ echo "exp-share-safe = True" >> $HGRCPATH
#endif
$ . "$TESTDIR/narrow-library.sh"
#if tree
$ cat << EOF >> $HGRCPATH
> [experimental]
> treemanifest = 1
> EOF
#endif
$ cat << EOF >> $HGRCPATH
> [extensions]
> share =
> EOF
$ hg init remote
$ cd remote
$ for x in `$TESTDIR/seq.py 0 10`
> do
> mkdir d$x
> echo $x > d$x/f
> hg add d$x/f
> hg commit -m "add d$x/f"
> done
$ cd ..
$ hg clone --narrow ssh://user@dummy/remote main -q \
> --include d1 --include d3 --include d5 --include d7
Ignore file called "ignored"
$ echo ignored > main/.hgignore
$ hg share main share
updating working directory
4 files updated, 0 files merged, 0 files removed, 0 files unresolved
$ hg -R share tracked
I path:d1
I path:d3
I path:d5
I path:d7
$ hg -R share files
share/d1/f
share/d3/f
share/d5/f
share/d7/f
Narrow the share and check that the main repo's working copy gets updated
# Make sure the files that are supposed to be known-clean get their timestamps set in the dirstate
$ sleep 2
$ hg -R main st
$ hg -R main debugdirstate --no-dates
n 644 2 set d1/f
n 644 2 set d3/f
n 644 2 set d5/f
n 644 2 set d7/f
# Make d3/f dirty
$ echo x >> main/d3/f
$ echo y >> main/d3/g
$ touch main/d3/ignored
$ touch main/d3/untracked
$ hg add main/d3/g
$ hg -R main st
M d3/f
A d3/g
? d3/untracked
# Make d5/f not match the dirstate timestamp even though it's clean
$ sleep 2
$ hg -R main st
M d3/f
A d3/g
? d3/untracked
$ hg -R main debugdirstate --no-dates
n 644 2 set d1/f
n 644 2 set d3/f
a 0 -1 unset d3/g
n 644 2 set d5/f
n 644 2 set d7/f
$ touch main/d5/f
$ hg -R share tracked --removeinclude d1 --removeinclude d3 --removeinclude d5
comparing with ssh://user@dummy/remote
searching for changes
looking for local changes to affected paths
deleting data/d1/f.i
deleting data/d3/f.i
deleting data/d5/f.i
deleting meta/d1/00manifest.i (tree !)
deleting meta/d3/00manifest.i (tree !)
deleting meta/d5/00manifest.i (tree !)
deleting unwanted files from working copy
$ hg -R main tracked
I path:d7
$ hg -R main files
abort: working copy's narrowspec is stale
(run 'hg tracked --update-working-copy')
[20]
$ hg -R main tracked --update-working-copy
not deleting possibly dirty file d3/f
not deleting possibly dirty file d3/g
not deleting possibly dirty file d5/f
not deleting unknown file d3/untracked
not deleting ignored file d3/ignored
# d1/f, d3/f, d3/g and d5/f should no longer be reported
$ hg -R main files
main/d7/f
# d1/f should no longer be there, d3/f should be since it was dirty, d3/g should be there since
# it was added, and d5/f should be since we couldn't be sure it was clean
$ find main/d* -type f | sort
main/d3/f
main/d3/g
main/d3/ignored
main/d3/untracked
main/d5/f
main/d7/f
Widen the share and check that the main repo's working copy gets updated
$ hg -R share tracked --addinclude d1 --addinclude d3 -q
$ hg -R share tracked
I path:d1
I path:d3
I path:d7
$ hg -R share files
share/d1/f
share/d3/f
share/d7/f
$ hg -R main tracked
I path:d1
I path:d3
I path:d7
$ hg -R main files
abort: working copy's narrowspec is stale
(run 'hg tracked --update-working-copy')
[20]
$ hg -R main tracked --update-working-copy
# d1/f, d3/f should be back
$ hg -R main files
main/d1/f
main/d3/f
main/d7/f
# d3/f should be modified (not clobbered by the widening), and d3/g should be untracked
$ hg -R main st --all
M d3/f
? d3/g
? d3/untracked
I d3/ignored
C d1/f
C d7/f
We should also be able to unshare without breaking everything:
$ hg share main share-unshare
updating working directory
3 files updated, 0 files merged, 0 files removed, 0 files unresolved
$ cd share-unshare
$ hg unshare
$ hg verify -q
$ cd ..
Dirstate should be left alone when upgrading from version of hg that didn't support narrow+share
$ hg share main share-upgrade
updating working directory
3 files updated, 0 files merged, 0 files removed, 0 files unresolved
$ cd share-upgrade
$ echo x >> d1/f
$ echo y >> d3/g
$ hg add d3/g
$ hg rm d7/f
$ hg st
M d1/f
A d3/g
R d7/f
Make it look like a repo from before narrow+share was supported
$ rm .hg/narrowspec.dirstate
$ hg ci -Am test
abort: working copy's narrowspec is stale
(run 'hg tracked --update-working-copy')
[20]
$ hg tracked --update-working-copy
$ hg st
M d1/f
A d3/g
R d7/f
$ cd ..