cborutil: change buffering strategy
Profiling revealed that we were spending a lot of time on the
line that was concatenating the old buffer with the incoming data
when attempting to decode long byte strings, such as manifest
revisions.
Essentially, we were feeding N chunks of size len(X) << len(Y) into
decode() and continuously allocating a new, larger buffer to hold
the undecoded input. This created substantial memory churn and
slowed down execution.
Changing the code to aggregate pending chunks in a list until we
have enough data to fully decode the next atom makes things much
more efficient.
I don't have exact data, but I recall the old code spending >1s
on manifest fulltexts from the mozilla-unified repo. The new code
doesn't significantly appear in profile output.
Differential Revision: https://phab.mercurial-scm.org/D4854
$ hg init a
$ cd a
$ echo a > a
$ hg add -n
adding a
$ hg st
? a
$ hg add
adding a
$ hg st
A a
$ hg forget a
$ hg add
adding a
$ hg forget a
$ hg add --color debug
[addremove.added ui.status|adding a]
$ hg st
A a
$ mkdir dir
$ cd dir
$ hg add ../a
../a already tracked!
$ cd ..
$ echo b > b
$ hg add -n b
$ hg st
A a
? b
$ hg add b
$ hg st
A a
A b
should fail
$ hg add b
b already tracked!
$ hg st
A a
A b
#if no-windows
$ echo foo > con.xml
$ hg --config ui.portablefilenames=jump add con.xml
abort: ui.portablefilenames value is invalid ('jump')
[255]
$ hg --config ui.portablefilenames=abort add con.xml
abort: filename contains 'con', which is reserved on Windows: con.xml
[255]
$ hg st
A a
A b
? con.xml
$ hg add con.xml
warning: filename contains 'con', which is reserved on Windows: con.xml
$ hg st
A a
A b
A con.xml
$ hg forget con.xml
$ rm con.xml
#endif
#if eol-in-paths
$ echo bla > 'hello:world'
$ hg --config ui.portablefilenames=abort add
adding hello:world
abort: filename contains ':', which is reserved on Windows: 'hello:world'
[255]
$ hg st
A a
A b
? hello:world
$ hg --config ui.portablefilenames=ignore add
adding hello:world
$ hg st
A a
A b
A hello:world
#endif
$ hg ci -m 0 --traceback
$ hg log -r "heads(. or wdir() & file('**'))"
changeset: 0:* (glob)
tag: tip
user: test
date: Thu Jan 01 00:00:00 1970 +0000
summary: 0
should fail
$ hg add a
a already tracked!
$ echo aa > a
$ hg ci -m 1
$ hg up 0
1 files updated, 0 files merged, 0 files removed, 0 files unresolved
$ echo aaa > a
$ hg ci -m 2
created new head
$ hg merge
merging a
warning: conflicts while merging a! (edit, then use 'hg resolve --mark')
0 files updated, 0 files merged, 0 files removed, 1 files unresolved
use 'hg resolve' to retry unresolved file merges or 'hg merge --abort' to abandon
[1]
$ hg st
M a
? a.orig
wdir doesn't cause a crash, and can be dynamically selected if dirty
$ hg log -r "heads(. or wdir() & file('**'))"
changeset: 2147483647:ffffffffffff
parent: 2:* (glob)
parent: 1:* (glob)
user: test
date: * (glob)
should fail
$ hg add a
a already tracked!
$ hg st
M a
? a.orig
$ hg resolve -m a
(no more unresolved files)
$ hg ci -m merge
Issue683: peculiarity with hg revert of an removed then added file
$ hg forget a
$ hg add a
$ hg st
? a.orig
$ hg rm a
$ hg st
R a
? a.orig
$ echo a > a
$ hg add a
$ hg st
M a
? a.orig
excluded file shouldn't be added even if it is explicitly specified
$ hg add a.orig -X '*.orig'
$ hg st
M a
? a.orig
Forgotten file can be added back (as either clean or modified)
$ hg forget b
$ hg add b
$ hg st -A b
C b
$ hg forget b
$ echo modified > b
$ hg add b
$ hg st -A b
M b
$ hg revert -qC b
$ hg add c && echo "unexpected addition of missing file"
c: * (glob)
[1]
$ echo c > c
$ hg add d c && echo "unexpected addition of missing file"
d: * (glob)
[1]
$ hg st
M a
A c
? a.orig
$ hg up -C
1 files updated, 0 files merged, 0 files removed, 0 files unresolved
forget and get should have the right order: added but missing dir should be
forgotten before file with same name is added
$ echo file d > d
$ hg add d
$ hg ci -md
$ hg rm d
$ mkdir d
$ echo a > d/a
$ hg add d/a
$ rm -r d
$ hg up -C
1 files updated, 0 files merged, 0 files removed, 0 files unresolved
$ cat d
file d
Test that adding a directory doesn't require case matching (issue4578)
#if icasefs
$ mkdir -p CapsDir1/CapsDir
$ echo abc > CapsDir1/CapsDir/AbC.txt
$ mkdir CapsDir1/CapsDir/SubDir
$ echo def > CapsDir1/CapsDir/SubDir/Def.txt
$ hg add capsdir1/capsdir
adding CapsDir1/CapsDir/AbC.txt
adding CapsDir1/CapsDir/SubDir/Def.txt
$ hg forget capsdir1/capsdir/abc.txt
$ hg forget capsdir1/capsdir
removing CapsDir1/CapsDir/SubDir/Def.txt
$ hg add capsdir1
adding CapsDir1/CapsDir/AbC.txt
adding CapsDir1/CapsDir/SubDir/Def.txt
$ hg ci -m "AbCDef" capsdir1/capsdir
$ hg status -A capsdir1/capsdir
C CapsDir1/CapsDir/AbC.txt
C CapsDir1/CapsDir/SubDir/Def.txt
$ hg files capsdir1/capsdir
CapsDir1/CapsDir/AbC.txt
CapsDir1/CapsDir/SubDir/Def.txt
$ echo xyz > CapsDir1/CapsDir/SubDir/Def.txt
$ hg ci -m xyz capsdir1/capsdir/subdir/def.txt
$ hg revert -r '.^' capsdir1/capsdir
reverting CapsDir1/CapsDir/SubDir/Def.txt
The conditional tests above mean the hash on the diff line differs on Windows
and OS X
$ hg diff capsdir1/capsdir
diff -r * CapsDir1/CapsDir/SubDir/Def.txt (glob)
--- a/CapsDir1/CapsDir/SubDir/Def.txt Thu Jan 01 00:00:00 1970 +0000
+++ b/CapsDir1/CapsDir/SubDir/Def.txt * (glob)
@@ -1,1 +1,1 @@
-xyz
+def
$ hg mv CapsDir1/CapsDir/abc.txt CapsDir1/CapsDir/ABC.txt
$ hg ci -m "case changing rename" CapsDir1/CapsDir/AbC.txt CapsDir1/CapsDir/ABC.txt
$ hg status -A capsdir1/capsdir
M CapsDir1/CapsDir/SubDir/Def.txt
C CapsDir1/CapsDir/ABC.txt
$ hg remove -f 'glob:**.txt' -X capsdir1/capsdir
$ hg remove -f 'glob:**.txt' -I capsdir1/capsdir
removing CapsDir1/CapsDir/ABC.txt
removing CapsDir1/CapsDir/SubDir/Def.txt
#endif
$ cd ..
test --dry-run mode in forget
$ hg init testdir_forget
$ cd testdir_forget
$ echo foo > foo
$ hg add foo
$ hg commit -m "foo"
$ hg forget foo --dry-run -v
removing foo
$ hg diff
$ hg forget not_exist -n
not_exist: $ENOENT$
[1]
$ cd ..
test --interactive mode in forget
$ hg init interactiveforget
$ cd interactiveforget
$ echo foo > foo
$ hg commit -qAm "foo"
$ echo bar > bar
$ hg commit -qAm "bar"
$ hg forget foo --dry-run -i
abort: cannot specify both --dry-run and --interactive
[255]
$ hg forget foo --config ui.interactive=True -i << EOF
> ?
> n
> EOF
forget foo [Ynsa?] ?
y - yes, forget this file
n - no, skip this file
s - skip remaining files
a - include all remaining files
? - ? (display help)
forget foo [Ynsa?] n
$ hg forget foo bar --config ui.interactive=True -i << EOF
> y
> n
> EOF
forget bar [Ynsa?] y
forget foo [Ynsa?] n
removing bar
$ hg status
R bar
$ hg up -qC .
$ hg forget foo bar --config ui.interactive=True -i << EOF
> s
> EOF
forget bar [Ynsa?] s
$ hg st
$ hg up -qC .
$ hg forget foo bar --config ui.interactive=True -i << EOF
> a
> EOF
forget bar [Ynsa?] a
removing bar
removing foo
$ hg status
R bar
R foo
$ hg up -qC .
$ cd ..