Mercurial > hg
view tests/test-export.t @ 49777:e1953a34c110
bundle: emit full snapshot as is, without doing a redelta
With the new `forced` delta-reused policy, it become important to be able to
send full snapshot where full snapshot are needed. Otherwise, the fallback delta
will simply be used on the client side… creating monstrous delta chain, since
revision that are meant as a reset of delta-chain chain becoming too complex are
simply adding a new full delta-tree on the leaf of another one.
In the `non-forced` cases, client process full snapshot from the bundle
differently from deltas, so client will still try to convert the full snapshot
into a delta if possible. So this will no lead to pathological storage
explosion.
I have considered making this configurable, but the impact seems limited enough
that it does not seems to be worth it. Especially with the current
sparse-revlog format that use "delta-tree" with multiple level snapshots, full
snapshot are much less frequent and not that different from other intermediate
snapshot that we are already sending over the wire anyway.
CPU wise, this will help the bundling side a little as it will not need to
reconstruct revisions and compute deltas. The unbundling side might save a tiny
amount of CPU as it won't need to reconstruct the delta-base to reconstruct the
revision full text. This only slightly visible in some of the benchmarks. And
have no real impact on most of them.
### data-env-vars.name = pypy-2018-08-01-zstd-sparse-revlog
# benchmark.name = perf-bundle
# benchmark.variants.revs = last-40000
before: 11.467186 seconds
just-emit-full: 11.190576 seconds (-2.41%)
with-pull-force: 11.041091 seconds (-3.72%)
# benchmark.name = perf-unbundle
# benchmark.variants.revs = last-40000
before: 16.744862
just-emit-full:: 16.561036 seconds (-1.10%)
with-pull-force: 16.389344 seconds (-2.12%)
# benchmark.name = pull
# benchmark.variants.revs = last-40000
before: 26.870569
just-emit-full: 26.391188 seconds (-1.78%)
with-pull-force: 25.633184 seconds (-4.60%)
Space wise (so network-wise) the impact is fairly small. When taking compression into
account.
Below are tests the size of `hg bundle --all` for a handful of benchmark repositories
(with bzip, zstd compression and without it)
This show a small increase in the bundle size, but nothing really significant
except maybe for mozilla-try (+12%) that nobody really pulls large chunk of anyway.
Mozilla-try is also the repository that benefit the most for not having to
recompute deltas client size.
### mercurial:
bzip-before: 26 406 342 bytes
bzip-after: 26 691 543 bytes +1.08%
zstd-before: 27 918 645 bytes
zstd-after: 28 075 896 bytes +0.56%
none-before: 98 675 601 bytes
none-after: 100 411 237 bytes +1.76%
### pypy
bzip-before: 201 295 752 bytes
bzip-after: 209 780 282 bytes +4.21%
zstd-before: 202 974 795 bytes
zstd-after: 205 165 780 bytes +1.08%
none-before: 871 070 261 bytes
none-after: 993 595 057 bytes +14.07%
### netbeans
bzip-before: 601 314 330 bytes
bzip-after: 614 246 241 bytes +2.15%
zstd-before: 604 745 136 bytes
zstd-after: 615 497 705 bytes +1.78%
none-before: 3 338 238 571 bytes
none-after: 3 439 422 535 bytes +3.03%
### mozilla-central
bzip-before: 1 493 006 921 bytes
bzip-after: 1 549 650 570 bytes +3.79%
zstd-before: 1 481 910 102 bytes
zstd-after: 1 513 052 415 bytes +2.10%
none-before: 6 535 929 910 bytes
none-after: 7 010 191 342 bytes +7.26%
### mozilla-try
bzip-before: 6 583 425 999 bytes
bzip-after: 7 423 536 928 bytes +12.76%
zstd-before: 6 021 009 212 bytes
zstd-after: 6 674 922 420 bytes +10.86%
none-before: 22 954 739 558 bytes
none-after: 26 013 854 771 bytes +13.32%
| author | Pierre-Yves David <pierre-yves.david@octobus.net> |
|---|---|
| date | Wed, 07 Dec 2022 20:12:23 +0100 |
| parents | 5ced12cfa41b |
| children |
line wrap: on
line source
$ hg init repo $ cd repo $ touch foo $ hg add foo $ for i in 0 1 2 3 4 5 6 7 8 9 10 11; do > echo "foo-$i" >> foo > hg ci -m "foo-$i" > done $ for out in "%nof%N" "%%%H" "%b-%R" "%h" "%r" "%m"; do > echo > echo "# foo-$out.patch" > hg export -v -o "foo-$out.patch" 2:tip > done # foo-%nof%N.patch exporting patches: foo-01of10.patch foo-02of10.patch foo-03of10.patch foo-04of10.patch foo-05of10.patch foo-06of10.patch foo-07of10.patch foo-08of10.patch foo-09of10.patch foo-10of10.patch # foo-%%%H.patch exporting patches: foo-%617188a1c80f869a7b66c85134da88a6fb145f67.patch foo-%dd41a5ff707a5225204105611ba49cc5c229d55f.patch foo-%f95a5410f8664b6e1490a4af654e4b7d41a7b321.patch foo-%4346bcfde53b4d9042489078bcfa9c3e28201db2.patch foo-%afda8c3a009cc99449a05ad8aa4655648c4ecd34.patch foo-%35284ce2b6b99c9d2ac66268fe99e68e1974e1aa.patch foo-%9688c41894e6931305fa7165a37f6568050b4e9b.patch foo-%747d3c68f8ec44bb35816bfcd59aeb50b9654c2f.patch foo-%5f17a83f5fbd9414006a5e563eab4c8a00729efd.patch foo-%f3acbafac161ec68f1598af38f794f28847ca5d3.patch # foo-%b-%R.patch exporting patches: foo-repo-2.patch foo-repo-3.patch foo-repo-4.patch foo-repo-5.patch foo-repo-6.patch foo-repo-7.patch foo-repo-8.patch foo-repo-9.patch foo-repo-10.patch foo-repo-11.patch # foo-%h.patch exporting patches: foo-617188a1c80f.patch foo-dd41a5ff707a.patch foo-f95a5410f866.patch foo-4346bcfde53b.patch foo-afda8c3a009c.patch foo-35284ce2b6b9.patch foo-9688c41894e6.patch foo-747d3c68f8ec.patch foo-5f17a83f5fbd.patch foo-f3acbafac161.patch # foo-%r.patch exporting patches: foo-02.patch foo-03.patch foo-04.patch foo-05.patch foo-06.patch foo-07.patch foo-08.patch foo-09.patch foo-10.patch foo-11.patch # foo-%m.patch exporting patches: foo-foo_2.patch foo-foo_3.patch foo-foo_4.patch foo-foo_5.patch foo-foo_6.patch foo-foo_7.patch foo-foo_8.patch foo-foo_9.patch foo-foo_10.patch foo-foo_11.patch Doing it again clobbers the files rather than appending: $ hg export -v -o "foo-%m.patch" 2:3 exporting patches: foo-foo_2.patch foo-foo_3.patch $ grep HG foo-foo_2.patch | wc -l \s*1 (re) $ grep HG foo-foo_3.patch | wc -l \s*1 (re) Using bookmarks: $ hg book -f -r 9 @ $ hg book -f -r 11 test $ hg export -B test # HG changeset patch # User test # Date 0 0 # Thu Jan 01 00:00:00 1970 +0000 # Node ID 5f17a83f5fbd9414006a5e563eab4c8a00729efd # Parent 747d3c68f8ec44bb35816bfcd59aeb50b9654c2f foo-10 diff -r 747d3c68f8ec -r 5f17a83f5fbd foo --- a/foo Thu Jan 01 00:00:00 1970 +0000 +++ b/foo Thu Jan 01 00:00:00 1970 +0000 @@ -8,3 +8,4 @@ foo-7 foo-8 foo-9 +foo-10 # HG changeset patch # User test # Date 0 0 # Thu Jan 01 00:00:00 1970 +0000 # Node ID f3acbafac161ec68f1598af38f794f28847ca5d3 # Parent 5f17a83f5fbd9414006a5e563eab4c8a00729efd foo-11 diff -r 5f17a83f5fbd -r f3acbafac161 foo --- a/foo Thu Jan 01 00:00:00 1970 +0000 +++ b/foo Thu Jan 01 00:00:00 1970 +0000 @@ -9,3 +9,4 @@ foo-8 foo-9 foo-10 +foo-11 Exporting 4 changesets to a file: $ hg export -o export_internal 1 2 3 4 $ grep HG export_internal | wc -l \s*4 (re) Doing it again clobbers the file rather than appending: $ hg export -o export_internal 1 2 3 4 $ grep HG export_internal | wc -l \s*4 (re) Exporting 4 changesets to stdout: $ hg export 1 2 3 4 | grep HG | wc -l \s*4 (re) Exporting revision -2 to a file: $ hg export -- -2 # HG changeset patch # User test # Date 0 0 # Thu Jan 01 00:00:00 1970 +0000 # Node ID 5f17a83f5fbd9414006a5e563eab4c8a00729efd # Parent 747d3c68f8ec44bb35816bfcd59aeb50b9654c2f foo-10 diff -r 747d3c68f8ec -r 5f17a83f5fbd foo --- a/foo Thu Jan 01 00:00:00 1970 +0000 +++ b/foo Thu Jan 01 00:00:00 1970 +0000 @@ -8,3 +8,4 @@ foo-7 foo-8 foo-9 +foo-10 Exporting wdir revision: $ echo "foo-wdir" >> foo $ hg export 'wdir()' # HG changeset patch # User test # Date 0 0 # Thu Jan 01 00:00:00 1970 +0000 # Node ID ffffffffffffffffffffffffffffffffffffffff # Parent f3acbafac161ec68f1598af38f794f28847ca5d3 diff -r f3acbafac161 foo --- a/foo Thu Jan 01 00:00:00 1970 +0000 +++ b/foo Thu Jan 01 00:00:00 1970 +0000 @@ -10,3 +10,4 @@ foo-9 foo-10 foo-11 +foo-wdir $ hg revert -q foo Templated output to stdout: $ hg export -Tjson 0 [ { "branch": "default", "date": [0, 0], "desc": "foo-0", "diff": "diff -r 000000000000 -r 871558de6af2 foo\n--- /dev/null\tThu Jan 01 00:00:00 1970 +0000\n+++ b/foo\tThu Jan 01 00:00:00 1970 +0000\n@@ -0,0 +1,1 @@\n+foo-0\n", "node": "871558de6af2e8c244222f8eea69b782c94ce3df", "parents": [], "user": "test" } ] Templated output to single file: $ hg export -Tjson 0:1 -o out.json $ cat out.json [ { "branch": "default", "date": [0, 0], "desc": "foo-0", "diff": "diff -r 000000000000 -r 871558de6af2 foo\n--- /dev/null\tThu Jan 01 00:00:00 1970 +0000\n+++ b/foo\tThu Jan 01 00:00:00 1970 +0000\n@@ -0,0 +1,1 @@\n+foo-0\n", "node": "871558de6af2e8c244222f8eea69b782c94ce3df", "parents": [], "user": "test" }, { "branch": "default", "date": [0, 0], "desc": "foo-1", "diff": "diff -r 871558de6af2 -r d1c9656e973c foo\n--- a/foo\tThu Jan 01 00:00:00 1970 +0000\n+++ b/foo\tThu Jan 01 00:00:00 1970 +0000\n@@ -1,1 +1,2 @@\n foo-0\n+foo-1\n", "node": "d1c9656e973cfb5aebd5499bbd2cb350e3b12266", "parents": ["871558de6af2e8c244222f8eea69b782c94ce3df"], "user": "test" } ] Templated output to multiple files: $ hg export -Tjson 0:1 -o 'out-{rev}.json' $ cat out-0.json [ { "branch": "default", "date": [0, 0], "desc": "foo-0", "diff": "diff -r 000000000000 -r 871558de6af2 foo\n--- /dev/null\tThu Jan 01 00:00:00 1970 +0000\n+++ b/foo\tThu Jan 01 00:00:00 1970 +0000\n@@ -0,0 +1,1 @@\n+foo-0\n", "node": "871558de6af2e8c244222f8eea69b782c94ce3df", "parents": [], "user": "test" } ] $ cat out-1.json [ { "branch": "default", "date": [0, 0], "desc": "foo-1", "diff": "diff -r 871558de6af2 -r d1c9656e973c foo\n--- a/foo\tThu Jan 01 00:00:00 1970 +0000\n+++ b/foo\tThu Jan 01 00:00:00 1970 +0000\n@@ -1,1 +1,2 @@\n foo-0\n+foo-1\n", "node": "d1c9656e973cfb5aebd5499bbd2cb350e3b12266", "parents": ["871558de6af2e8c244222f8eea69b782c94ce3df"], "user": "test" } ] Template keywrods: $ hg export 0 -T '# {node|shortest}\n\n{diff}' # 8715 diff -r 000000000000 -r 871558de6af2 foo --- /dev/null Thu Jan 01 00:00:00 1970 +0000 +++ b/foo Thu Jan 01 00:00:00 1970 +0000 @@ -0,0 +1,1 @@ +foo-0 No filename should be printed if stdout is specified explicitly: $ hg export -v 1 -o - exporting patch: # HG changeset patch # User test # Date 0 0 # Thu Jan 01 00:00:00 1970 +0000 # Node ID d1c9656e973cfb5aebd5499bbd2cb350e3b12266 # Parent 871558de6af2e8c244222f8eea69b782c94ce3df foo-1 diff -r 871558de6af2 -r d1c9656e973c foo --- a/foo Thu Jan 01 00:00:00 1970 +0000 +++ b/foo Thu Jan 01 00:00:00 1970 +0000 @@ -1,1 +1,2 @@ foo-0 +foo-1 Checking if only alphanumeric characters are used in the file name (%m option): $ echo "line" >> foo $ hg commit -m " !\"#$%&(,-./0123456789:;<=>?@ABCDEFGHIJKLMNOPQRSTUVWXYZ[\\]"'^'"_\`abcdefghijklmnopqrstuvwxyz{|}~" $ hg export -v -o %m.patch tip exporting patch: ___________0123456789_______ABCDEFGHIJKLMNOPQRSTUVWXYZ______abcdefghijklmnopqrstuvwxyz____.patch Template fragments in file name: $ hg export -v -o '{node|shortest}.patch' tip exporting patch: 197e.patch Backslash should be preserved because it is a directory separator on Windows: $ mkdir out $ hg export -v -o 'out\{node|shortest}.patch' tip exporting patch: out\197e.patch Still backslash is taken as an escape character in inner template strings: $ hg export -v -o '{"out\{foo}.patch"}' tip exporting patch: out{foo}.patch Invalid pattern in file name: $ hg export -o '%x.patch' tip abort: invalid format spec '%x' in output filename [255] $ hg export -o '%' tip abort: incomplete format spec in output filename [255] $ hg export -o '%{"foo"}' tip abort: incomplete format spec in output filename [255] $ hg export -o '%m{' tip hg: parse error at 3: unterminated template expansion (%m{ ^ here) [10] $ hg export -o '%\' tip abort: invalid format spec '%\' in output filename [255] $ hg export -o '\%' tip abort: incomplete format spec in output filename [255] Catch exporting unknown revisions (especially empty revsets, see issue3353) $ hg export # HG changeset patch # User test # Date 0 0 # Thu Jan 01 00:00:00 1970 +0000 # Node ID 197ecd81a57f760b54f34a58817ad5b04991fa47 # Parent f3acbafac161ec68f1598af38f794f28847ca5d3 !"#$%&(,-./0123456789:;<=>?@ABCDEFGHIJKLMNOPQRSTUVWXYZ[\]^_`abcdefghijklmnopqrstuvwxyz{|}~ diff -r f3acbafac161 -r 197ecd81a57f foo --- a/foo Thu Jan 01 00:00:00 1970 +0000 +++ b/foo Thu Jan 01 00:00:00 1970 +0000 @@ -10,3 +10,4 @@ foo-9 foo-10 foo-11 +line $ hg export "" hg: parse error: empty query [10] $ hg export 999 abort: unknown revision '999' [10] $ hg export "not all()" abort: export requires at least one changeset [10] Check for color output $ cat <<EOF >> $HGRCPATH > [color] > mode = ansi > [extensions] > color = > EOF $ hg export --color always --nodates tip # HG changeset patch # User test # Date 0 0 # Thu Jan 01 00:00:00 1970 +0000 # Node ID * (glob) # Parent * (glob) !"#$%&(,-./0123456789:;<=>?@ABCDEFGHIJKLMNOPQRSTUVWXYZ[\]^_`abcdefghijklmnopqrstuvwxyz{|}~ \x1b[0;1mdiff -r f3acbafac161 -r 197ecd81a57f foo\x1b[0m (esc) \x1b[0;31;1m--- a/foo\x1b[0m (esc) \x1b[0;32;1m+++ b/foo\x1b[0m (esc) \x1b[0;35m@@ -10,3 +10,4 @@\x1b[0m (esc) foo-9 foo-10 foo-11 \x1b[0;32m+line\x1b[0m (esc) $ cd ..