view tests/test-add.t @ 44363:f7459da77f23

nodemap: introduce an option to use mmap to read the nodemap mapping

The performance and memory benefit is much greater if we don't have to copy all
the data in memory for each information. So we introduce an option (on by
default) to read the data using mmap.

This changeset is the last one definition the API for index support nodemap
data. (they have to be able to use the mmaping).

Below are some benchmark comparing the best we currently have in 5.3 with the
final step of this series (using the persistent nodemap implementation in
Rust). The benchmark run `hg perfindex` with various revset and the following
variants:

Before:

 * do not use the persistent nodemap
 * use the CPython implementation of the index for nodemap
 * use mmapping of the changelog index

After:

 * use the MixedIndex Rust code, with the NodeTree object for nodemap access
   (still in review)
 * use the persistent nodemap data from disk
 * access the persistent nodemap data through mmap
 * use mmapping of the changelog index

The persistent nodemap greatly speed up  most operation on very large
repositories. Some of the previously very fast lookup end up a bit slower because
the persistent nodemap has to be setup. However the absolute slowdown is very
small and won't matters in the big picture.

Here are some numbers (in seconds) for the reference copy of mozilla-try:

Revset            Before   After     abs-change speedup

-10000:           0.004622 0.005532   0.000910  ×   0.83
-10:              0.000050 0.000132   0.000082  ×   0.37
tip               0.000052 0.000085   0.000033  ×   0.61
0 + (-10000:)     0.028222 0.005337  -0.022885  ×   5.29
0                 0.023521 0.000084  -0.023437  × 280.01
(-10000:) + 0     0.235539 0.005308  -0.230231  ×  44.37
(-10:) + :9       0.232883 0.000180  -0.232703  ×1293.79
(-10000:) + (:99) 0.238735 0.005358  -0.233377  ×  44.55
:99 + (-10000:)   0.317942 0.005593  -0.312349  ×  56.84
:9 + (-10:)       0.313372 0.000179  -0.313193  ×1750.68
:9                0.316450 0.000143  -0.316307  ×2212.93


On smaller repositories, the cost of nodemap related operation is not as big, so
the win is much more modest. Yet it helps shaving a handful of millisecond here
and there.

Here are some numbers (in seconds) for the reference copy of mercurial:

Revset            Before   After     abs-change speedup
-10:              0.000065 0.000097   0.000032  × 0.67
tip               0.000063 0.000078   0.000015  × 0.80
0                 0.000561 0.000079  -0.000482  × 7.10
-10000:           0.004609 0.003648  -0.000961  × 1.26
0 + (-10000:)     0.005023 0.003715  -0.001307  × 1.35
(-10:) + :9       0.002187 0.000108  -0.002079  ×20.25
(-10000:) + 0     0.006252 0.003716  -0.002536  × 1.68
(-10000:) + (:99) 0.006367 0.003707  -0.002660  × 1.71
:9 + (-10:)       0.003846 0.000110  -0.003736  ×34.96
:9                0.003854 0.000099  -0.003755  ×38.92
:99 + (-10000:)   0.007644 0.003778  -0.003866  × 2.02

Differential Revision: https://phab.mercurial-scm.org/D7894

  $ 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
  [ui.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 ..