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https://github.com/facebook/sapling.git
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7a4ad651b5
In the most complex case, we try using the incoming delta base, then we try both parents, and then we try the previous revlog entry. If none of these result in a good delta, we natually use the null revision as base. However, we sometimes consider the nullrev before we have exhausted our other options. Specifically, when both parents are null, we use the nullrev as delta base if it produces a good delta (according to _isgooddelta()), and we fail to try the previous revlog entry as delta base. After e60126c6093d (addrevision: use general delta when the incoming base delta is bad, 2015-12-01), it can also happen for non-merge commits when the incoming delta is not good. The Firefox repo (from many months back) shrinks a tiny bit with this patch: from 1.855GB to 1.830GB (1.4%). The hg repo itself shrinks even less: by less than 0.1%. There may be repos that get larger instead. This undoes the unexplained test change in e60126c6093d.
161 lines
5.8 KiB
Perl
161 lines
5.8 KiB
Perl
Check whether size of generaldelta revlog is not bigger than its
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regular equivalent. Test would fail if generaldelta was naive
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implementation of parentdelta: third manifest revision would be fully
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inserted due to big distance from its paren revision (zero).
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$ hg init repo --config format.generaldelta=no --config format.usegeneraldelta=no
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$ cd repo
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$ echo foo > foo
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$ echo bar > bar
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$ echo baz > baz
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$ hg commit -q -Am boo
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$ hg clone --pull . ../gdrepo -q --config format.generaldelta=yes
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$ for r in 1 2 3; do
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> echo $r > foo
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> hg commit -q -m $r
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> hg up -q -r 0
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> hg pull . -q -r $r -R ../gdrepo
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> done
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$ cd ..
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>>> import os
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>>> regsize = os.stat("repo/.hg/store/00manifest.i").st_size
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>>> gdsize = os.stat("gdrepo/.hg/store/00manifest.i").st_size
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>>> if regsize < gdsize:
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... print 'generaldata increased size of manifest'
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Verify rev reordering doesnt create invalid bundles (issue4462)
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This requires a commit tree that when pulled will reorder manifest revs such
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that the second manifest to create a file rev will be ordered before the first
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manifest to create that file rev. We also need to do a partial pull to ensure
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reordering happens. At the end we verify the linkrev points at the earliest
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commit.
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$ hg init server --config format.generaldelta=True
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$ cd server
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$ touch a
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$ hg commit -Aqm a
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$ echo x > x
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$ echo y > y
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$ hg commit -Aqm xy
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$ hg up -q '.^'
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$ echo x > x
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$ echo z > z
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$ hg commit -Aqm xz
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$ hg up -q 1
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$ echo b > b
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$ hg commit -Aqm b
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$ hg merge -q 2
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$ hg commit -Aqm merge
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$ echo c > c
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$ hg commit -Aqm c
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$ hg log -G -T '{rev} {shortest(node)} {desc}'
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@ 5 ebb8 c
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o 4 baf7 merge
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| o 3 a129 b
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o | 2 958c xz
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| o 1 f00c xy
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|/
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o 0 3903 a
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$ cd ..
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$ hg init client --config format.generaldelta=false --config format.usegeneraldelta=false
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$ cd client
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$ hg pull -q ../server -r 4
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$ hg debugindex x
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rev offset length base linkrev nodeid p1 p2
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0 0 3 0 1 1406e7411862 000000000000 000000000000
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$ cd ..
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Test "usegeneraldelta" config
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(repo are general delta, but incoming bundle are not re-deltified)
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delta coming from the server base delta server are not recompressed.
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(also include the aggressive version for comparison)
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$ hg clone repo --pull --config format.usegeneraldelta=1 usegd
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requesting all changes
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adding changesets
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adding manifests
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adding file changes
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added 4 changesets with 6 changes to 3 files (+2 heads)
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updating to branch default
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3 files updated, 0 files merged, 0 files removed, 0 files unresolved
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$ hg clone repo --pull --config format.generaldelta=1 full
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requesting all changes
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adding changesets
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adding manifests
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adding file changes
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added 4 changesets with 6 changes to 3 files (+2 heads)
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updating to branch default
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3 files updated, 0 files merged, 0 files removed, 0 files unresolved
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$ hg -R repo debugindex -m
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rev offset length base linkrev nodeid p1 p2
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0 0 104 0 0 cef96823c800 000000000000 000000000000
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1 104 57 0 1 58ab9a8d541d cef96823c800 000000000000
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2 161 57 0 2 134fdc6fd680 cef96823c800 000000000000
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3 218 104 3 3 723508934dad cef96823c800 000000000000
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$ hg -R usegd debugindex -m
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rev offset length delta linkrev nodeid p1 p2
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0 0 104 -1 0 cef96823c800 000000000000 000000000000
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1 104 57 0 1 58ab9a8d541d cef96823c800 000000000000
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2 161 57 1 2 134fdc6fd680 cef96823c800 000000000000
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3 218 57 0 3 723508934dad cef96823c800 000000000000
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$ hg -R full debugindex -m
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rev offset length delta linkrev nodeid p1 p2
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0 0 104 -1 0 cef96823c800 000000000000 000000000000
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1 104 57 0 1 58ab9a8d541d cef96823c800 000000000000
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2 161 57 0 2 134fdc6fd680 cef96823c800 000000000000
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3 218 57 0 3 723508934dad cef96823c800 000000000000
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Test format.aggressivemergedeltas
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$ hg init --config format.generaldelta=1 aggressive
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$ cd aggressive
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$ cat << EOF >> .hg/hgrc
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> [format]
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> generaldelta = 1
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> EOF
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$ touch a b c d e
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$ hg commit -Aqm side1
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$ hg up -q null
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$ touch x y
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$ hg commit -Aqm side2
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- Verify non-aggressive merge uses p1 (commit 1) as delta parent
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$ hg merge -q 0
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$ hg commit -q -m merge
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$ hg debugindex -m
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rev offset length delta linkrev nodeid p1 p2
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0 0 59 -1 0 8dde941edb6e 000000000000 000000000000
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1 59 61 0 1 315c023f341d 000000000000 000000000000
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2 120 65 1 2 2ab389a983eb 315c023f341d 8dde941edb6e
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$ hg strip -q -r . --config extensions.strip=
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- Verify aggressive merge uses p2 (commit 0) as delta parent
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$ hg up -q -C 1
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$ hg merge -q 0
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$ hg commit -q -m merge --config format.aggressivemergedeltas=True
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$ hg debugindex -m
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rev offset length delta linkrev nodeid p1 p2
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0 0 59 -1 0 8dde941edb6e 000000000000 000000000000
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1 59 61 0 1 315c023f341d 000000000000 000000000000
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2 120 62 0 2 2ab389a983eb 315c023f341d 8dde941edb6e
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Test that strip bundle use bundle2
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$ hg --config extensions.strip= strip .
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0 files updated, 0 files merged, 5 files removed, 0 files unresolved
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saved backup bundle to $TESTTMP/aggressive/.hg/strip-backup/1c5d4dc9a8b8-6c68e60c-backup.hg (glob)
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$ hg debugbundle .hg/strip-backup/*
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Stream params: {'Compression': 'BZ'}
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changegroup -- "{'version': '02'}"
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1c5d4dc9a8b8d6e1750966d343e94db665e7a1e9
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$ cd ..
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