zstd: vendor python-zstandard 0.7.0
Commit 3054ae3a66112970a091d3939fee32c2d0c1a23e from
https://github.com/indygreg/python-zstandard is imported without
modifications (other than removing unwanted files).
The vendored zstd library within has been upgraded from 1.1.2 to
1.1.3. This version introduced new APIs for threads, thread
pools, multi-threaded compression, and a new dictionary
builder (COVER). These features are not yet used by
python-zstandard (or Mercurial for that matter). However,
that will likely change in the next python-zstandard release
(and I think there are opportunities for Mercurial to take
advantage of the multi-threaded APIs).
Relevant to Mercurial, the CFFI bindings are now fully
implemented. This means zstd should "just work" with PyPy
(although I haven't tried). The python-zstandard test suite also
runs all tests against both the C extension and CFFI bindings to
ensure feature parity.
There is also a "decompress_content_dict_chain()" API. This was
derived from discussions with Yann Collet on list about alternate
ways of encoding delta chains.
The change most relevant to Mercurial is a performance enhancement in
the simple decompression API to reuse a data structure across
operations. This makes decompression of multiple inputs significantly
faster. (This scenario occurs when reading revlog delta chains, for
example.)
Using python-zstandard's bench.py to measure the performance
difference...
On changelog chunks in the mozilla-unified repo:
decompress discrete decompress() reuse zctx
1.262243 wall; 1.260000 CPU; 1.260000 user; 0.000000 sys 170.43 MB/s (best of 3)
0.949106 wall; 0.950000 CPU; 0.950000 user; 0.000000 sys 226.66 MB/s (best of 4)
decompress discrete dict decompress() reuse zctx
0.692170 wall; 0.690000 CPU; 0.690000 user; 0.000000 sys 310.80 MB/s (best of 5)
0.437088 wall; 0.440000 CPU; 0.440000 user; 0.000000 sys 492.17 MB/s (best of 7)
On manifest chunks in the mozilla-unified repo:
decompress discrete decompress() reuse zctx
1.367284 wall; 1.370000 CPU; 1.370000 user; 0.000000 sys 274.01 MB/s (best of 3)
1.086831 wall; 1.080000 CPU; 1.080000 user; 0.000000 sys 344.72 MB/s (best of 3)
decompress discrete dict decompress() reuse zctx
0.993272 wall; 0.990000 CPU; 0.990000 user; 0.000000 sys 377.19 MB/s (best of 3)
0.678651 wall; 0.680000 CPU; 0.680000 user; 0.000000 sys 552.06 MB/s (best of 5)
That should make reads on zstd revlogs a bit faster ;)
# no-check-commit
#require killdaemons
$ cat > writelines.py <<EOF
> import sys
> path = sys.argv[1]
> args = sys.argv[2:]
> assert (len(args) % 2) == 0
>
> f = file(path, 'wb')
> for i in xrange(len(args)/2):
> count, s = args[2*i:2*i+2]
> count = int(count)
> s = s.decode('string_escape')
> f.write(s*count)
> f.close()
>
> EOF
> cat <<EOF >> $HGRCPATH
> [extensions]
> mq =
> [diff]
> git = 1
> EOF
$ hg init repo
$ cd repo
qimport without file or revision
$ hg qimport
abort: no files or revisions specified
[255]
qimport non-existing-file
$ hg qimport non-existing-file
abort: unable to read file non-existing-file
[255]
qimport null revision
$ hg qimport -r null
abort: revision -1 is not mutable
(see 'hg help phases' for details)
[255]
$ hg qseries
import email
$ hg qimport --push -n email - <<EOF
> From: Username in email <test@example.net>
> Subject: [PATCH] Message in email
> Date: Fri, 02 Jan 1970 00:00:00 +0000
>
> Text before patch.
>
> # HG changeset patch
> # User Username in patch <test@example.net>
> # Date 0 0
> # Node ID 1a706973a7d84cb549823634a821d9bdf21c6220
> # Parent 0000000000000000000000000000000000000000
> First line of commit message.
>
> More text in commit message.
> --- confuse the diff detection
>
> diff --git a/x b/x
> new file mode 100644
> --- /dev/null
> +++ b/x
> @@ -0,0 +1,1 @@
> +new file
> Text after patch.
>
> EOF
adding email to series file
applying email
now at: email
hg tip -v
$ hg tip -v
changeset: 0:1a706973a7d8
tag: email
tag: qbase
tag: qtip
tag: tip
user: Username in patch <test@example.net>
date: Thu Jan 01 00:00:00 1970 +0000
files: x
description:
First line of commit message.
More text in commit message.
$ hg qpop
popping email
patch queue now empty
$ hg qdelete email
import URL
$ echo foo >> foo
$ hg add foo
$ hg diff > url.diff
$ hg revert --no-backup foo
$ rm foo
Under unix: file:///foobar/blah
Under windows: file:///c:/foobar/blah
$ patchurl=`pwd | tr '\\\\' /`/url.diff
$ expr "$patchurl" : "\/" > /dev/null || patchurl="/$patchurl"
$ hg qimport file://"$patchurl"
adding url.diff to series file
$ rm url.diff
$ hg qun
url.diff
import patch that already exists
$ echo foo2 >> foo
$ hg add foo
$ hg diff > ../url.diff
$ hg revert --no-backup foo
$ rm foo
$ hg qimport ../url.diff
abort: patch "url.diff" already exists
[255]
$ hg qpush
applying url.diff
now at: url.diff
$ cat foo
foo
$ hg qpop
popping url.diff
patch queue now empty
qimport -f
$ hg qimport -f ../url.diff
adding url.diff to series file
$ hg qpush
applying url.diff
now at: url.diff
$ cat foo
foo2
$ hg qpop
popping url.diff
patch queue now empty
build diff with CRLF
$ python ../writelines.py b 5 'a\n' 5 'a\r\n'
$ hg ci -Am addb
adding b
$ python ../writelines.py b 2 'a\n' 10 'b\n' 2 'a\r\n'
$ hg diff > b.diff
$ hg up -C
1 files updated, 0 files merged, 0 files removed, 0 files unresolved
qimport CRLF diff
$ hg qimport b.diff
adding b.diff to series file
$ hg qpush
applying b.diff
now at: b.diff
try to import --push
$ cat > appendfoo.diff <<EOF
> append foo
>
> diff -r 07f494440405 -r 261500830e46 baz
> --- /dev/null Thu Jan 01 00:00:00 1970 +0000
> +++ b/baz Thu Jan 01 00:00:00 1970 +0000
> @@ -0,0 +1,1 @@
> +foo
> EOF
$ cat > appendbar.diff <<EOF
> append bar
>
> diff -r 07f494440405 -r 261500830e46 baz
> --- a/baz Thu Jan 01 00:00:00 1970 +0000
> +++ b/baz Thu Jan 01 00:00:00 1970 +0000
> @@ -1,1 +1,2 @@
> foo
> +bar
> EOF
$ hg qimport --push appendfoo.diff appendbar.diff
adding appendfoo.diff to series file
adding appendbar.diff to series file
applying appendfoo.diff
applying appendbar.diff
now at: appendbar.diff
$ hg qfin -a
patch b.diff finalized without changeset message
$ touch .hg/patches/append_foo
$ hg qimport -r 'p1(.)::'
$ hg qapplied
append_foo__1
append_bar
$ hg qfin -a
$ rm .hg/patches/append_foo
$ hg qimport -r 'p1(.)::' -P
$ hg qpop -a
popping append_bar
popping append_foo
patch queue now empty
$ hg qdel append_foo
$ hg qdel -k append_bar
qimport -e
$ hg qimport -e append_bar
adding append_bar to series file
$ hg qdel -k append_bar
qimport -e --name newname oldexisitingpatch
$ hg qimport -e --name this-name-is-better append_bar
renaming append_bar to this-name-is-better
adding this-name-is-better to series file
$ hg qser
this-name-is-better
url.diff
qimport -e --name without --force
$ cp .hg/patches/this-name-is-better .hg/patches/3.diff
$ hg qimport -e --name this-name-is-better 3.diff
abort: patch "this-name-is-better" already exists
[255]
$ hg qser
this-name-is-better
url.diff
qimport -e --name with --force
$ hg qimport --force -e --name this-name-is-better 3.diff
renaming 3.diff to this-name-is-better
adding this-name-is-better to series file
$ hg qser
this-name-is-better
url.diff
qimport with bad name, should abort before reading file
$ hg qimport non-existent-file --name .hg
abort: patch name cannot begin with ".hg"
[255]
qimport http:// patch with leading slashes in url
set up hgweb
$ cd ..
$ hg init served
$ cd served
$ echo a > a
$ hg ci -Am patch
adding a
$ hg serve -p $HGPORT -d --pid-file=hg.pid -A access.log -E errors.log
$ cat hg.pid >> $DAEMON_PIDS
$ cd ../repo
$ hg qimport http://localhost:$HGPORT/raw-rev/0///
adding 0 to series file
check qimport phase:
$ hg -q qpush
now at: 0
$ hg phase qparent
1: draft
$ hg qimport -r qparent
$ hg phase qbase
1: draft
$ hg qfinish qbase
$ echo '[mq]' >> $HGRCPATH
$ echo 'secret=true' >> $HGRCPATH
$ hg qimport -r qparent
$ hg phase qbase
1: secret
$ cd ..
$ killdaemons.py
check patch name generation for non-alpha-numeric summary line
$ cd repo
$ hg qpop -a -q
patch queue now empty
$ hg qseries -v
0 U imported_patch_b_diff
1 U 0
2 U this-name-is-better
3 U url.diff
$ echo bb >> b
$ hg commit -m '==++--=='
$ hg qimport -r tip
$ hg qseries -v
0 A 1.diff
1 U imported_patch_b_diff
2 U 0
3 U this-name-is-better
4 U url.diff
check reserved patch names
$ hg qpop -qa
patch queue now empty
$ echo >> b
$ hg commit -m 'status'
$ echo >> b
$ hg commit -m '.'
$ echo >> b
$ hg commit -m 'taken'
$ mkdir .hg/patches/taken
$ touch .hg/patches/taken__1
$ hg qimport -r -3::
$ hg qap
1.diff__1
2.diff
taken__2
check very long patch name
$ hg qpop -qa
patch queue now empty
$ echo >> b
$ hg commit -m 'abcdefghi pqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghi pqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghi pqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghi pqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghi pqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghi pqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ'
$ hg qimport -r .
$ hg qap
abcdefghi_pqrstuvwxyzabcdefghijklmnopqrstuvwxyzabcdefghi_pqrstuvwxyzabcdefg