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copies: do full filtering at end of _changesetforwardcopies()...
copies: do full filtering at end of _changesetforwardcopies() As mentioned earlier, pathcopies() is very slow when copies are stored in the changeset. Most of the cost comes from calling _chain() for every changeset, which is slow because it needs to read manifests. It needs to read manifests to be able to filter out copies that are were created in one commit and then deleted. (It also filters out copies that were created from a file that didn't exist in the starting revision, but that's a fixed revision across calls to _chain(), so it's much cheaper.) This patch changes from _chainandfilter() to just _chain() in the main loop in _changesetforwardcopies(). It instead removes copies that have subsequently been removed by using ctx.filesremoved(). We thus rely on that to be fast. It timed this command in mozilla-unified: hg debugpathcopies FIREFOX_59_0b3_BUILD2 FIREFOX_BETA_59_END It took 18s before and 1.1s after. It's still faster when copy information is stored in filelogs: 0.70s. It also still gets slow when there are merge commits involved, because we read manifests there too. We'll deal with that later. Differential Revision: https://phab.mercurial-scm.org/D6419
Martin von Zweigbergk - - Load All Authors

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test-copies.t
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#testcases filelog compatibility changeset
$ cat >> $HGRCPATH << EOF
> [extensions]
> rebase=
> [alias]
> l = log -G -T '{rev} {desc}\n{files}\n'
> EOF
#if compatibility
$ cat >> $HGRCPATH << EOF
> [experimental]
> copies.read-from = compatibility
> EOF
#endif
#if changeset
$ cat >> $HGRCPATH << EOF
> [experimental]
> copies.read-from = changeset-only
> copies.write-to = changeset-only
> EOF
#endif
$ REPONUM=0
$ newrepo() {
> cd $TESTTMP
> REPONUM=`expr $REPONUM + 1`
> hg init repo-$REPONUM
> cd repo-$REPONUM
> }
Simple rename case
$ newrepo
$ echo x > x
$ hg ci -Aqm 'add x'
$ hg mv x y
$ hg debugp1copies
x -> y
$ hg debugp2copies
$ hg ci -m 'rename x to y'
$ hg l
@ 1 rename x to y
| x y
o 0 add x
x
$ hg debugp1copies -r 1
x -> y
$ hg debugpathcopies 0 1
x -> y
$ hg debugpathcopies 1 0
y -> x
Test filtering copies by path. We do filtering by destination.
$ hg debugpathcopies 0 1 x
$ hg debugpathcopies 1 0 x
y -> x
$ hg debugpathcopies 0 1 y
x -> y
$ hg debugpathcopies 1 0 y
Copy a file onto another file
$ newrepo
$ echo x > x
$ echo y > y
$ hg ci -Aqm 'add x and y'
$ hg cp -f x y
$ hg debugp1copies
x -> y
$ hg debugp2copies
$ hg ci -m 'copy x onto y'
$ hg l
@ 1 copy x onto y
| y
o 0 add x and y
x y
$ hg debugp1copies -r 1
x -> y
Incorrectly doesn't show the rename
$ hg debugpathcopies 0 1
Copy a file onto another file with same content. If metadata is stored in changeset, this does not
produce a new filelog entry. The changeset's "files" entry should still list the file.
$ newrepo
$ echo x > x
$ echo x > x2
$ hg ci -Aqm 'add x and x2 with same content'
$ hg cp -f x x2
$ hg ci -m 'copy x onto x2'
$ hg l
@ 1 copy x onto x2
| x2
o 0 add x and x2 with same content
x x2
$ hg debugp1copies -r 1
x -> x2
Incorrectly doesn't show the rename
$ hg debugpathcopies 0 1
Copy a file, then delete destination, then copy again. This does not create a new filelog entry.
$ newrepo
$ echo x > x
$ hg ci -Aqm 'add x'
$ hg cp x y
$ hg ci -m 'copy x to y'
$ hg rm y
$ hg ci -m 'remove y'
$ hg cp -f x y
$ hg ci -m 'copy x onto y (again)'
$ hg l
@ 3 copy x onto y (again)
| y
o 2 remove y
| y
o 1 copy x to y
| y
o 0 add x
x
$ hg debugp1copies -r 3
x -> y
$ hg debugpathcopies 0 3
x -> y
Rename file in a loop: x->y->z->x
$ newrepo
$ echo x > x
$ hg ci -Aqm 'add x'
$ hg mv x y
$ hg debugp1copies
x -> y
$ hg debugp2copies
$ hg ci -m 'rename x to y'
$ hg mv y z
$ hg ci -m 'rename y to z'
$ hg mv z x
$ hg ci -m 'rename z to x'
$ hg l
@ 3 rename z to x
| x z
o 2 rename y to z
| y z
o 1 rename x to y
| x y
o 0 add x
x
$ hg debugpathcopies 0 3
Copy x to y, then remove y, then add back y. With copy metadata in the changeset, this could easily
end up reporting y as copied from x (if we don't unmark it as a copy when it's removed).
$ newrepo
$ echo x > x
$ hg ci -Aqm 'add x'
$ hg mv x y
$ hg ci -m 'rename x to y'
$ hg rm y
$ hg ci -qm 'remove y'
$ echo x > y
$ hg ci -Aqm 'add back y'
$ hg l
@ 3 add back y
| y
o 2 remove y
| y
o 1 rename x to y
| x y
o 0 add x
x
$ hg debugp1copies -r 3
$ hg debugpathcopies 0 3
Copy x to z, then remove z, then copy x2 (same content as x) to z. With copy metadata in the
changeset, the two copies here will have the same filelog entry, so ctx['z'].introrev() might point
to the first commit that added the file. We should still report the copy as being from x2.
$ newrepo
$ echo x > x
$ echo x > x2
$ hg ci -Aqm 'add x and x2 with same content'
$ hg cp x z
$ hg ci -qm 'copy x to z'
$ hg rm z
$ hg ci -m 'remove z'
$ hg cp x2 z
$ hg ci -m 'copy x2 to z'
$ hg l
@ 3 copy x2 to z
| z
o 2 remove z
| z
o 1 copy x to z
| z
o 0 add x and x2 with same content
x x2
$ hg debugp1copies -r 3
x2 -> z
$ hg debugpathcopies 0 3
x2 -> z
Create x and y, then rename them both to the same name, but on different sides of a fork
$ newrepo
$ echo x > x
$ echo y > y
$ hg ci -Aqm 'add x and y'
$ hg mv x z
$ hg ci -qm 'rename x to z'
$ hg co -q 0
$ hg mv y z
$ hg ci -qm 'rename y to z'
$ hg l
@ 2 rename y to z
| y z
| o 1 rename x to z
|/ x z
o 0 add x and y
x y
$ hg debugpathcopies 1 2
z -> x
y -> z
Fork renames x to y on one side and removes x on the other
$ newrepo
$ echo x > x
$ hg ci -Aqm 'add x'
$ hg mv x y
$ hg ci -m 'rename x to y'
$ hg co -q 0
$ hg rm x
$ hg ci -m 'remove x'
created new head
$ hg l
@ 2 remove x
| x
| o 1 rename x to y
|/ x y
o 0 add x
x
$ hg debugpathcopies 1 2
Copies via null revision (there shouldn't be any)
$ newrepo
$ echo x > x
$ hg ci -Aqm 'add x'
$ hg cp x y
$ hg ci -m 'copy x to y'
$ hg co -q null
$ echo x > x
$ hg ci -Aqm 'add x (again)'
$ hg l
@ 2 add x (again)
x
o 1 copy x to y
| y
o 0 add x
x
$ hg debugpathcopies 1 2
$ hg debugpathcopies 2 1
Merge rename from other branch
$ newrepo
$ echo x > x
$ hg ci -Aqm 'add x'
$ hg mv x y
$ hg ci -m 'rename x to y'
$ hg co -q 0
$ echo z > z
$ hg ci -Aqm 'add z'
$ hg merge -q 1
$ hg debugp1copies
$ hg debugp2copies
$ hg ci -m 'merge rename from p2'
$ hg l
@ 3 merge rename from p2
|\ x
| o 2 add z
| | z
o | 1 rename x to y
|/ x y
o 0 add x
x
Perhaps we should indicate the rename here, but `hg status` is documented to be weird during
merges, so...
$ hg debugp1copies -r 3
$ hg debugp2copies -r 3
$ hg debugpathcopies 0 3
x -> y
$ hg debugpathcopies 1 2
y -> x
$ hg debugpathcopies 1 3
$ hg debugpathcopies 2 3
x -> y
Copy file from either side in a merge
$ newrepo
$ echo x > x
$ hg ci -Aqm 'add x'
$ hg co -q null
$ echo y > y
$ hg ci -Aqm 'add y'
$ hg merge -q 0
$ hg cp y z
$ hg debugp1copies
y -> z
$ hg debugp2copies
$ hg ci -m 'copy file from p1 in merge'
$ hg co -q 1
$ hg merge -q 0
$ hg cp x z
$ hg debugp1copies
$ hg debugp2copies
x -> z
$ hg ci -qm 'copy file from p2 in merge'
$ hg l
@ 3 copy file from p2 in merge
|\ z
+---o 2 copy file from p1 in merge
| |/ z
| o 1 add y
| y
o 0 add x
x
$ hg debugp1copies -r 2
y -> z
$ hg debugp2copies -r 2
$ hg debugpathcopies 1 2
y -> z
$ hg debugpathcopies 0 2
$ hg debugp1copies -r 3
$ hg debugp2copies -r 3
x -> z
$ hg debugpathcopies 1 3
$ hg debugpathcopies 0 3
x -> z
Copy file that exists on both sides of the merge, same content on both sides
$ newrepo
$ echo x > x
$ hg ci -Aqm 'add x on branch 1'
$ hg co -q null
$ echo x > x
$ hg ci -Aqm 'add x on branch 2'
$ hg merge -q 0
$ hg cp x z
$ hg debugp1copies
x -> z
$ hg debugp2copies
$ hg ci -qm 'merge'
$ hg l
@ 2 merge
|\ z
| o 1 add x on branch 2
| x
o 0 add x on branch 1
x
$ hg debugp1copies -r 2
x -> z
$ hg debugp2copies -r 2
It's a little weird that it shows up on both sides
$ hg debugpathcopies 1 2
x -> z
$ hg debugpathcopies 0 2
x -> z (filelog !)
Copy file that exists on both sides of the merge, different content
$ newrepo
$ echo branch1 > x
$ hg ci -Aqm 'add x on branch 1'
$ hg co -q null
$ echo branch2 > x
$ hg ci -Aqm 'add x on branch 2'
$ hg merge -q 0
warning: conflicts while merging x! (edit, then use 'hg resolve --mark')
[1]
$ echo resolved > x
$ hg resolve -m x
(no more unresolved files)
$ hg cp x z
$ hg debugp1copies
x -> z
$ hg debugp2copies
$ hg ci -qm 'merge'
$ hg l
@ 2 merge
|\ x z
| o 1 add x on branch 2
| x
o 0 add x on branch 1
x
$ hg debugp1copies -r 2
x -> z (changeset !)
$ hg debugp2copies -r 2
x -> z (no-changeset !)
$ hg debugpathcopies 1 2
x -> z (changeset !)
$ hg debugpathcopies 0 2
x -> z (no-changeset !)
Copy x->y on one side of merge and copy x->z on the other side. Pathcopies from one parent
of the merge to the merge should include the copy from the other side.
$ newrepo
$ echo x > x
$ hg ci -Aqm 'add x'
$ hg cp x y
$ hg ci -qm 'copy x to y'
$ hg co -q 0
$ hg cp x z
$ hg ci -qm 'copy x to z'
$ hg merge -q 1
$ hg ci -m 'merge copy x->y and copy x->z'
$ hg l
@ 3 merge copy x->y and copy x->z
|\
| o 2 copy x to z
| | z
o | 1 copy x to y
|/ y
o 0 add x
x
$ hg debugp1copies -r 3
$ hg debugp2copies -r 3
$ hg debugpathcopies 2 3
x -> y
$ hg debugpathcopies 1 3
x -> z
Copy x to y on one side of merge, create y and rename to z on the other side. Pathcopies from the
first side should not include the y->z rename since y didn't exist in the merge base.
$ newrepo
$ echo x > x
$ hg ci -Aqm 'add x'
$ hg cp x y
$ hg ci -qm 'copy x to y'
$ hg co -q 0
$ echo y > y
$ hg ci -Aqm 'add y'
$ hg mv y z
$ hg ci -m 'rename y to z'
$ hg merge -q 1
$ hg ci -m 'merge'
$ hg l
@ 4 merge
|\
| o 3 rename y to z
| | y z
| o 2 add y
| | y
o | 1 copy x to y
|/ y
o 0 add x
x
$ hg debugp1copies -r 3
y -> z
$ hg debugp2copies -r 3
$ hg debugpathcopies 2 3
y -> z
$ hg debugpathcopies 1 3
Create x and y, then rename x to z on one side of merge, and rename y to z and modify z on the
other side.
$ newrepo
$ echo x > x
$ echo y > y
$ hg ci -Aqm 'add x and y'
$ hg mv x z
$ hg ci -qm 'rename x to z'
$ hg co -q 0
$ hg mv y z
$ hg ci -qm 'rename y to z'
$ echo z >> z
$ hg ci -m 'modify z'
$ hg merge -q 1
warning: conflicts while merging z! (edit, then use 'hg resolve --mark')
[1]
$ echo z > z
$ hg resolve -qm z
$ hg ci -m 'merge 1 into 3'
Try merging the other direction too
$ hg co -q 1
$ hg merge -q 3
warning: conflicts while merging z! (edit, then use 'hg resolve --mark')
[1]
$ echo z > z
$ hg resolve -qm z
$ hg ci -m 'merge 3 into 1'
created new head
$ hg l
@ 5 merge 3 into 1
|\ y z
+---o 4 merge 1 into 3
| |/ x z
| o 3 modify z
| | z
| o 2 rename y to z
| | y z
o | 1 rename x to z
|/ x z
o 0 add x and y
x y
$ hg debugpathcopies 1 4
$ hg debugpathcopies 2 4
$ hg debugpathcopies 0 4
x -> z (filelog !)
y -> z (compatibility !)
$ hg debugpathcopies 1 5
$ hg debugpathcopies 2 5
$ hg debugpathcopies 0 5
x -> z
Test for a case in fullcopytracing algorithm where neither of the merging csets
is a descendant of the merge base. This test reflects that the algorithm
correctly finds the copies:
$ cat >> $HGRCPATH << EOF
> [experimental]
> evolution.createmarkers=True
> evolution.allowunstable=True
> EOF
$ newrepo
$ echo a > a
$ hg add a
$ hg ci -m "added a"
$ echo b > b
$ hg add b
$ hg ci -m "added b"
$ hg mv b b1
$ hg ci -m "rename b to b1"
$ hg up ".^"
1 files updated, 0 files merged, 1 files removed, 0 files unresolved
$ echo d > d
$ hg add d
$ hg ci -m "added d"
created new head
$ echo baba >> b
$ hg ci --amend -m "added d, modified b"
$ hg l --hidden
@ 4 added d, modified b
| b d
| x 3 added d
|/ d
| o 2 rename b to b1
|/ b b1
o 1 added b
| b
o 0 added a
a
Grafting revision 4 on top of revision 2, showing that it respect the rename:
$ hg up 2 -q
$ hg graft -r 4 --base 3 --hidden
grafting 4:af28412ec03c "added d, modified b" (tip) (no-changeset !)
grafting 4:6325ca0b7a1c "added d, modified b" (tip) (changeset !)
merging b1 and b to b1
$ hg l -l1 -p
@ 5 added d, modified b
| b1
~ diff -r 5a4825cc2926 -r 94a2f1a0e8e2 b1 (no-changeset !)
~ diff -r 0a0ed3b3251c -r d544fb655520 b1 (changeset !)
--- a/b1 Thu Jan 01 00:00:00 1970 +0000
+++ b/b1 Thu Jan 01 00:00:00 1970 +0000
@@ -1,1 +1,2 @@
b
+baba
Test to make sure that fullcopytracing algorithm doesn't fail when neither of the
merging csets is a descendant of the base.
-------------------------------------------------------------------------------------------------
$ newrepo
$ echo a > a
$ hg add a
$ hg ci -m "added a"
$ echo b > b
$ hg add b
$ hg ci -m "added b"
$ echo foobar > willconflict
$ hg add willconflict
$ hg ci -m "added willconflict"
$ echo c > c
$ hg add c
$ hg ci -m "added c"
$ hg l
@ 3 added c
| c
o 2 added willconflict
| willconflict
o 1 added b
| b
o 0 added a
a
$ hg up ".^^"
0 files updated, 0 files merged, 2 files removed, 0 files unresolved
$ echo d > d
$ hg add d
$ hg ci -m "added d"
created new head
$ echo barfoo > willconflict
$ hg add willconflict
$ hg ci --amend -m "added willconflict and d"
$ hg l
@ 5 added willconflict and d
| d willconflict
| o 3 added c
| | c
| o 2 added willconflict
|/ willconflict
o 1 added b
| b
o 0 added a
a
$ hg rebase -r . -d 2 -t :other
rebasing 5:5018b1509e94 "added willconflict and d" (tip) (no-changeset !)
rebasing 5:af8d273bf580 "added willconflict and d" (tip) (changeset !)
$ hg up 3 -q
$ hg l --hidden
o 6 added willconflict and d
| d willconflict
| x 5 added willconflict and d
| | d willconflict
| | x 4 added d
| |/ d
+---@ 3 added c
| | c
o | 2 added willconflict
|/ willconflict
o 1 added b
| b
o 0 added a
a
Now if we trigger a merge between revision 3 and 6 using base revision 4,
neither of the merging csets will be a descendant of the base revision:
$ hg graft -r 6 --base 4 --hidden -t :other
grafting 6:99802e4f1e46 "added willconflict and d" (tip) (no-changeset !)
grafting 6:b19f0df72728 "added willconflict and d" (tip) (changeset !)