branches: avoid unnecessary changectx.branch() calls
This requires reading from the changelog, which can be costly over NFS.
Note that this does not totally remove reading from the changelog; we
still do that when calling changectx.closesbranch(). That call will be
removed in a later patch.
Running hg branches on the PyPy repo (with 996) over a busy NFS server,
before this change:
$ time hg --profile branches > /dev/null
CallCount Recursive Total(s) Inline(s) module:lineno(function)
2042 0 2.2827 2.2827 <open>
2036 0 0.9840 0.9840 <method 'close' of 'file' objects>
2036 0 0.0464 0.0464 <method 'read' of 'file' objects>
5233 0 0.1985 0.0453 mercurial.repoview:161(changelog)
10462 0 0.0791 0.0314 mercurial.changelog:133(tip)
5233 0 0.0388 0.0176 mercurial.localrepo:26(__get__)
10462 0 0.0250 0.0126 <len>
5233 0 0.0059 0.0039 mercurial.repoview:112(filterrevs)
10462 0 0.0029 0.0029 <hash>
2034 0 0.0444 0.0444 <method 'seek' of 'file' objects>
5340 0 0.0390 0.0390 mercurial.revlog:296(rev)
2582 0 0.0371 0.0371 <zlib.decompress>
3155 0 0.1963 0.0366 mercurial.context:202(__init__)
3155 0 0.1238 0.0306 mercurial.repoview:161(changelog)
3155 0 0.0261 0.0080 mercurial.changelog:183(rev)
9465 0 0.0061 0.0061 <isinstance>
1096 0 0.0023 0.0023 <binascii.unhexlify>
4251 0 0.0014 0.0014 <len>
2059 0 3.7341 0.0332 mercurial.changelog:270(read)
2059 0 3.6304 0.0307 mercurial.revlog:907(revision)
2057 0 0.0262 0.0137 mercurial.changelog:28(decodeextra)
4118 0 0.0094 0.0094 <method 'split' of 'str' objects>
4118 0 0.0270 0.0048 mercurial.encoding:61(tolocal)
2059 0 0.0040 0.0040 <method 'index' of 'str' objects>
10462 0 0.0791 0.0314 mercurial.changelog:133(tip)
10462 0 0.0289 0.0207 mercurial.changelog:190(node)
10462 0 0.0188 0.0091 <len>
52433 20932 0.0478 0.0310 <len>
20932 0 0.0221 0.0168 mercurial.revlog:262(__len__)
2059 0 3.6304 0.0307 mercurial.revlog:907(revision)
real 0m4.361s
user 0m0.986s
sys 0m0.237s
After this change:
$ time hg --profile branches > /dev/null
CallCount Recursive Total(s) Inline(s) module:lineno(function)
1069 0 1.1098 1.1098 <open>
1063 0 0.4865 0.4865 <method 'close' of 'file' objects>
4122 0 0.1811 0.0404 mercurial.repoview:161(changelog)
8240 0 0.0712 0.0272 mercurial.changelog:133(tip)
4122 0 0.0378 0.0177 mercurial.localrepo:26(__get__)
8240 0 0.0221 0.0115 <len>
4122 0 0.0057 0.0033 mercurial.repoview:112(filterrevs)
8240 0 0.0025 0.0025 <hash>
3029 0 0.1979 0.0371 mercurial.context:202(__init__)
3029 0 0.1278 0.0310 mercurial.repoview:161(changelog)
3029 0 0.0230 0.0081 mercurial.changelog:183(rev)
9087 0 0.0061 0.0061 <isinstance>
1096 0 0.0026 0.0026 <binascii.unhexlify>
4125 0 0.0014 0.0014 <len>
4229 0 0.0337 0.0337 mercurial.revlog:296(rev)
1061 0 0.0296 0.0296 <method 'seek' of 'file' objects>
1063 0 0.0292 0.0292 <method 'read' of 'file' objects>
8240 0 0.0712 0.0272 mercurial.changelog:133(tip)
8240 0 0.0271 0.0196 mercurial.changelog:190(node)
8240 0 0.0169 0.0083 <len>
40476 16488 0.0422 0.0271 <len>
16488 0 0.0193 0.0152 mercurial.revlog:262(__len__)
1342 0 0.0241 0.0241 <zlib.decompress>
9445 0 0.0336 0.0224 mercurial.changelog:190(node)
9445 0 0.0112 0.0112 mercurial.revlog:317(node)
1074 0 1.9102 0.0224 mercurial.changelog:270(read)
1074 0 1.8397 0.0202 mercurial.revlog:907(revision)
1073 0 0.0187 0.0099 mercurial.changelog:28(decodeextra)
2148 0 0.0061 0.0061 <method 'split' of 'str' objects>
2148 0 0.0184 0.0034 mercurial.encoding:61(tolocal)
real 0m2.402s
user 0m0.735s
sys 0m0.177s
$ HGFOO=BAR; export HGFOO
$ cat >> $HGRCPATH <<EOF
> [alias]
> # should clobber ci but not commit (issue2993)
> ci = version
> myinit = init
> optionalrepo = showconfig alias.myinit
> cleanstatus = status -c
> unknown = bargle
> ambiguous = s
> recursive = recursive
> nodefinition =
> no--cwd = status --cwd elsewhere
> no-R = status -R elsewhere
> no--repo = status --repo elsewhere
> no--repository = status --repository elsewhere
> no--config = status --config a.config=1
> mylog = log
> lognull = log -r null
> shortlog = log --template '{rev} {node|short} | {date|isodate}\n'
> positional = log --template '{\$2} {\$1} | {date|isodate}\n'
> dln = lognull --debug
> nousage = rollback
> put = export -r 0 -o "\$FOO/%R.diff"
> blank = !printf '\n'
> self = !printf '\$0\n'
> echoall = !printf '\$@\n'
> echo1 = !printf '\$1\n'
> echo2 = !printf '\$2\n'
> echo13 = !printf '\$1 \$3\n'
> count = !hg log -r "\$@" --template=. | wc -c | sed -e 's/ //g'
> mcount = !hg log \$@ --template=. | wc -c | sed -e 's/ //g'
> rt = root
> tglog = log -G --template "{rev}:{node|short}: '{desc}' {branches}\n"
> idalias = id
> idaliaslong = id
> idaliasshell = !echo test
> parentsshell1 = !echo one
> parentsshell2 = !echo two
> escaped1 = !printf 'test\$\$test\n'
> escaped2 = !sh -c 'echo "HGFOO is \$\$HGFOO"'
> escaped3 = !sh -c 'echo "\$1 is \$\$\$1"'
> escaped4 = !printf '\$\$0 \$\$@\n'
>
> [defaults]
> mylog = -q
> lognull = -q
> log = -v
> EOF
basic
$ hg myinit alias
unknown
$ hg unknown
alias 'unknown' resolves to unknown command 'bargle'
$ hg help unknown
alias 'unknown' resolves to unknown command 'bargle'
ambiguous
$ hg ambiguous
alias 'ambiguous' resolves to ambiguous command 's'
$ hg help ambiguous
alias 'ambiguous' resolves to ambiguous command 's'
recursive
$ hg recursive
alias 'recursive' resolves to unknown command 'recursive'
$ hg help recursive
alias 'recursive' resolves to unknown command 'recursive'
no definition
$ hg nodef
no definition for alias 'nodefinition'
$ hg help nodef
no definition for alias 'nodefinition'
invalid options
$ hg no--cwd
error in definition for alias 'no--cwd': --cwd may only be given on the command line
$ hg help no--cwd
error in definition for alias 'no--cwd': --cwd may only be given on the command line
$ hg no-R
error in definition for alias 'no-R': -R may only be given on the command line
$ hg help no-R
error in definition for alias 'no-R': -R may only be given on the command line
$ hg no--repo
error in definition for alias 'no--repo': --repo may only be given on the command line
$ hg help no--repo
error in definition for alias 'no--repo': --repo may only be given on the command line
$ hg no--repository
error in definition for alias 'no--repository': --repository may only be given on the command line
$ hg help no--repository
error in definition for alias 'no--repository': --repository may only be given on the command line
$ hg no--config
error in definition for alias 'no--config': --config may only be given on the command line
optional repository
#if no-outer-repo
$ hg optionalrepo
init
#endif
$ cd alias
$ cat > .hg/hgrc <<EOF
> [alias]
> myinit = init -q
> EOF
$ hg optionalrepo
init -q
no usage
$ hg nousage
no rollback information available
$ echo foo > foo
$ hg commit -Amfoo
adding foo
with opts
$ hg cleanst
C foo
with opts and whitespace
$ hg shortlog
0 e63c23eaa88a | 1970-01-01 00:00 +0000
positional arguments
$ hg positional
abort: too few arguments for command alias
[255]
$ hg positional a
abort: too few arguments for command alias
[255]
$ hg positional 'node|short' rev
0 e63c23eaa88a | 1970-01-01 00:00 +0000
interaction with defaults
$ hg mylog
0:e63c23eaa88a
$ hg lognull
-1:000000000000
properly recursive
$ hg dln
changeset: -1:0000000000000000000000000000000000000000
parent: -1:0000000000000000000000000000000000000000
parent: -1:0000000000000000000000000000000000000000
manifest: -1:0000000000000000000000000000000000000000
user:
date: Thu Jan 01 00:00:00 1970 +0000
extra: branch=default
path expanding
$ FOO=`pwd` hg put
$ cat 0.diff
# HG changeset patch
# User test
# Date 0 0
# Thu Jan 01 00:00:00 1970 +0000
# Node ID e63c23eaa88ae77967edcf4ea194d31167c478b0
# Parent 0000000000000000000000000000000000000000
foo
diff -r 000000000000 -r e63c23eaa88a 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
simple shell aliases
$ hg blank
$ hg blank foo
$ hg self
self
$ hg echoall
$ hg echoall foo
foo
$ hg echoall 'test $2' foo
test $2 foo
$ hg echo1 foo bar baz
foo
$ hg echo2 foo bar baz
bar
$ hg echo13 foo bar baz test
foo baz
$ hg echo2 foo
$ echo bar > bar
$ hg commit -qA -m bar
$ hg count .
1
$ hg count 'branch(default)'
2
$ hg mcount -r '"branch(default)"'
2
$ hg tglog
@ 1:042423737847: 'bar'
|
o 0:e63c23eaa88a: 'foo'
shadowing
$ hg i
hg: command 'i' is ambiguous:
idalias idaliaslong idaliasshell identify import incoming init
[255]
$ hg id
042423737847 tip
$ hg ida
hg: command 'ida' is ambiguous:
idalias idaliaslong idaliasshell
[255]
$ hg idalias
042423737847 tip
$ hg idaliasl
042423737847 tip
$ hg idaliass
test
$ hg parentsshell
hg: command 'parentsshell' is ambiguous:
parentsshell1 parentsshell2
[255]
$ hg parentsshell1
one
$ hg parentsshell2
two
shell aliases with global options
$ hg init sub
$ cd sub
$ hg count 'branch(default)'
abort: unknown revision 'default'!
0
$ hg -v count 'branch(default)'
abort: unknown revision 'default'!
0
$ hg -R .. count 'branch(default)'
abort: unknown revision 'default'!
0
$ hg --cwd .. count 'branch(default)'
2
$ hg echoall --cwd ..
repo specific shell aliases
$ cat >> .hg/hgrc <<EOF
> [alias]
> subalias = !echo sub
> EOF
$ cat >> ../.hg/hgrc <<EOF
> [alias]
> mainalias = !echo main
> EOF
shell alias defined in current repo
$ hg subalias
sub
$ hg --cwd .. subalias > /dev/null
hg: unknown command 'subalias'
[255]
$ hg -R .. subalias > /dev/null
hg: unknown command 'subalias'
[255]
shell alias defined in other repo
$ hg mainalias > /dev/null
hg: unknown command 'mainalias'
[255]
$ hg -R .. mainalias
main
$ hg --cwd .. mainalias
main
shell aliases with escaped $ chars
$ hg escaped1
test$test
$ hg escaped2
HGFOO is BAR
$ hg escaped3 HGFOO
HGFOO is BAR
$ hg escaped4 test
$0 $@
invalid arguments
$ hg rt foo
hg rt: invalid arguments
hg rt
alias for: hg root
use "hg help rt" to show the full help text
[255]
invalid global arguments for normal commands, aliases, and shell aliases
$ hg --invalid root
hg: option --invalid not recognized
Mercurial Distributed SCM
basic commands:
add add the specified files on the next commit
annotate show changeset information by line for each file
clone make a copy of an existing repository
commit commit the specified files or all outstanding changes
diff diff repository (or selected files)
export dump the header and diffs for one or more changesets
forget forget the specified files on the next commit
init create a new repository in the given directory
log show revision history of entire repository or files
merge merge working directory with another revision
pull pull changes from the specified source
push push changes to the specified destination
remove remove the specified files on the next commit
serve start stand-alone webserver
status show changed files in the working directory
summary summarize working directory state
update update working directory (or switch revisions)
use "hg help" for the full list of commands or "hg -v" for details
[255]
$ hg --invalid mylog
hg: option --invalid not recognized
Mercurial Distributed SCM
basic commands:
add add the specified files on the next commit
annotate show changeset information by line for each file
clone make a copy of an existing repository
commit commit the specified files or all outstanding changes
diff diff repository (or selected files)
export dump the header and diffs for one or more changesets
forget forget the specified files on the next commit
init create a new repository in the given directory
log show revision history of entire repository or files
merge merge working directory with another revision
pull pull changes from the specified source
push push changes to the specified destination
remove remove the specified files on the next commit
serve start stand-alone webserver
status show changed files in the working directory
summary summarize working directory state
update update working directory (or switch revisions)
use "hg help" for the full list of commands or "hg -v" for details
[255]
$ hg --invalid blank
hg: option --invalid not recognized
Mercurial Distributed SCM
basic commands:
add add the specified files on the next commit
annotate show changeset information by line for each file
clone make a copy of an existing repository
commit commit the specified files or all outstanding changes
diff diff repository (or selected files)
export dump the header and diffs for one or more changesets
forget forget the specified files on the next commit
init create a new repository in the given directory
log show revision history of entire repository or files
merge merge working directory with another revision
pull pull changes from the specified source
push push changes to the specified destination
remove remove the specified files on the next commit
serve start stand-alone webserver
status show changed files in the working directory
summary summarize working directory state
update update working directory (or switch revisions)
use "hg help" for the full list of commands or "hg -v" for details
[255]
This should show id:
$ hg --config alias.log='id' log
000000000000 tip
This shouldn't:
$ hg --config alias.log='id' history
$ cd ../..