view tests/test-merge-exec.t @ 47119:15395fd8ab28

dirstate-tree: Use HashMap instead of BTreeMap

BTreeMap has the advantage of its "natural" iteration order being the one we need
in the status algorithm. With HashMap however, iteration order is undefined so
we need to allocate a Vec and sort it explicitly.

Unfortunately many BTreeMap operations are slower than in HashMap, and skipping
that extra allocation and sort is not enough to compensate.

Switching to HashMap + sort makes `hg status` 17% faster in one test case,
as measure with hyperfine:

```
Benchmark #1: ../hg2/hg status -R $REPO --config=experimental.dirstate-tree.in-memory=1
  Time (mean ± σ):     765.0 ms ±   8.8 ms    [User: 1.352 s, System: 0.747 s]
  Range (min … max):   751.8 ms … 778.7 ms    10 runs

Benchmark #2: ./hg status -R $REPO --config=experimental.dirstate-tree.in-memory=1
  Time (mean ± σ):     651.8 ms ±   9.9 ms    [User: 1.251 s, System: 0.799 s]
  Range (min … max):   642.2 ms … 671.8 ms    10 runs

Summary
  './hg status -R $REPO --config=experimental.dirstate-tree.in-memory=1' ran
    1.17 ± 0.02 times faster than '../hg2/hg status -R $REPO --config=experimental.dirstate-tree.in-memory=1'
```

* ./hg is this revision
* ../hg2/hg is its parent
* $REPO is an old snapshot of mozilla-central

Differential Revision: https://phab.mercurial-scm.org/D10553

===============================================
Testing merge involving change to the exec flag
===============================================

#require execbit


Initial setup
==============


  $ hg init base-repo
  $ cd base-repo
  $ cat << EOF > a
  > 1
  > 2
  > 3
  > 4
  > 5
  > 6
  > 7
  > 8
  > 9
  > EOF
  $ touch b
  $ hg add a b
  $ hg commit -m "initial commit"
  $ cd ..

  $ hg init base-exec
  $ cd base-exec
  $ cat << EOF > a
  > 1
  > 2
  > 3
  > 4
  > 5
  > 6
  > 7
  > 8
  > 9
  > EOF
  $ chmod +x a
  $ touch b
  $ hg add a b
  $ hg commit -m "initial commit"
  $ cd ..

Testing merging mode change
===========================

Adding the flag
---------------

setup

Change on one side, executable bit on the other

  $ hg clone base-repo simple-merge-repo
  updating to branch default
  2 files updated, 0 files merged, 0 files removed, 0 files unresolved
  $ cd simple-merge-repo
  $ chmod +x a
  $ hg ci -m "make a executable, no change"
  $ [ -x a ] || echo "executable bit not recorded"
  $ hg up ".^"
  1 files updated, 0 files merged, 0 files removed, 0 files unresolved
  $ cat << EOF > a
  > 1
  > 2
  > 3
  > 4
  > 5
  > 6
  > 7
  > x
  > 9
  > EOF
  $ hg commit -m "edit end of file"
  created new head

merge them (from the update side)

  $ hg merge 'desc("make a executable, no change")'
  1 files updated, 0 files merged, 0 files removed, 0 files unresolved
  (branch merge, don't forget to commit)
  $ hg st
  M a
  $ [ -x a ] || echo "executable bit lost"

merge them (from the chmod side)

  $ hg up -C 'desc("make a executable, no change")'
  1 files updated, 0 files merged, 0 files removed, 0 files unresolved
  $ hg merge 'desc("edit end of file")'
  1 files updated, 0 files merged, 0 files removed, 0 files unresolved
  (branch merge, don't forget to commit)
  $ hg st
  M a
  $ [ -x a ] || echo "executable bit lost"


  $ cd ..


Removing the flag
-----------------

Change on one side, executable bit on the other

  $ hg clone base-exec simple-merge-repo-removal
  updating to branch default
  2 files updated, 0 files merged, 0 files removed, 0 files unresolved
  $ cd simple-merge-repo-removal
  $ chmod -x a
  $ hg ci -m "make a non-executable, no change"
  $ [ -x a ] && echo "executable bit not removed"
  [1]
  $ hg up ".^"
  1 files updated, 0 files merged, 0 files removed, 0 files unresolved
  $ cat << EOF > a
  > 1
  > 2
  > 3
  > 4
  > 5
  > 6
  > 7
  > x
  > 9
  > EOF
  $ hg commit -m "edit end of file"
  created new head

merge them (from the update side)

  $ hg merge 'desc("make a non-executable, no change")'
  1 files updated, 0 files merged, 0 files removed, 0 files unresolved
  (branch merge, don't forget to commit)
  $ hg st
  M a
  $ [ -x a ] && echo "executable bit not removed"
  [1]

merge them (from the chmod side)

  $ hg up -C 'desc("make a non-executable, no change")'
  1 files updated, 0 files merged, 0 files removed, 0 files unresolved
  $ hg merge 'desc("edit end of file")'
  1 files updated, 0 files merged, 0 files removed, 0 files unresolved
  (branch merge, don't forget to commit)
  $ hg st
  M a
  $ [ -x a ] && echo "executable bit not removed"
  [1]


  $ cd ..

Testing merging mode change with rename
=======================================

Adding the flag
---------------

  $ hg clone base-repo rename-merge-repo
  updating to branch default
  2 files updated, 0 files merged, 0 files removed, 0 files unresolved
  $ cd rename-merge-repo

make "a" executable on one side

  $ chmod +x a
  $ hg status
  M a
  $ hg ci -m "make a executable"
  $ [ -x a ] || echo "executable bit not recorded"
  $ hg up ".^"
  1 files updated, 0 files merged, 0 files removed, 0 files unresolved

make "a" renamed on the other side

  $ hg mv a z
  $ hg st --copies
  A z
    a
  R a
  $ hg ci -m "rename a to z"
  created new head

merge them (from the rename side)

  $ hg merge 'desc("make a executable")'
  1 files updated, 0 files merged, 0 files removed, 0 files unresolved
  (branch merge, don't forget to commit)
  $ hg st --copies
  M z
    a
  $ [ -x z ] || echo "executable bit lost"

merge them (from the chmod side)

  $ hg up -C 'desc("make a executable")'
  1 files updated, 0 files merged, 1 files removed, 0 files unresolved
  $ hg merge 'desc("rename a to z")'
  1 files updated, 0 files merged, 0 files removed, 0 files unresolved
  (branch merge, don't forget to commit)
  $ hg st --copies
  M z
    a
  R a
  $ [ -x z ] || echo "executable bit lost"


  $ cd ..

Removing the flag
-----------------

  $ hg clone base-exec rename-merge-repo-removal
  updating to branch default
  2 files updated, 0 files merged, 0 files removed, 0 files unresolved
  $ cd rename-merge-repo-removal

make "a" non-executable on one side

  $ chmod -x a
  $ hg status
  M a
  $ hg ci -m "make a non-executable"
  $ [ -x a ] && echo "executable bit not removed"
  [1]
  $ hg up ".^"
  1 files updated, 0 files merged, 0 files removed, 0 files unresolved

make "a" renamed on the other side

  $ hg mv a z
  $ hg st --copies
  A z
    a
  R a
  $ hg ci -m "rename a to z"
  created new head

merge them (from the rename side)

  $ hg merge 'desc("make a non-executable")'
  1 files updated, 0 files merged, 0 files removed, 0 files unresolved
  (branch merge, don't forget to commit)
  $ hg st --copies
  M z
    a
  $ [ -x z ] && echo "executable bit not removed"
  [1]

merge them (from the chmod side)

  $ hg up -C 'desc("make a non-executable")'
  1 files updated, 0 files merged, 1 files removed, 0 files unresolved
  $ hg merge 'desc("rename a to z")'
  1 files updated, 0 files merged, 0 files removed, 0 files unresolved
  (branch merge, don't forget to commit)
  $ hg st --copies
  M z
    a
  R a
  $ [ -x z ] && echo "executable bit not removed"
  [1]


  $ cd ..


Testing merging mode change with rename + modification on both side
===================================================================


Adding the flag
---------------

  $ hg clone base-repo rename+mod-merge-repo
  updating to branch default
  2 files updated, 0 files merged, 0 files removed, 0 files unresolved
  $ cd rename+mod-merge-repo

make "a" executable on one side

  $ chmod +x a
  $ cat << EOF > a
  > 1
  > x
  > 3
  > 4
  > 5
  > 6
  > 7
  > 8
  > 9
  > EOF
  $ hg status
  M a
  $ hg ci -m "make a executable, and change start"
  $ [ -x a ] || echo "executable bit not recorded"
  $ hg up ".^"
  1 files updated, 0 files merged, 0 files removed, 0 files unresolved

make "a" renamed on the other side

  $ hg mv a z
  $ hg st --copies
  A z
    a
  R a
  $ cat << EOF > z
  > 1
  > 2
  > 3
  > 4
  > 5
  > 6
  > 7
  > x
  > 9
  > EOF
  $ hg ci -m "rename a to z, and change end"
  created new head

merge them (from the rename side)

  $ hg merge 'desc("make a executable")'
  merging z and a to z
  0 files updated, 1 files merged, 0 files removed, 0 files unresolved
  (branch merge, don't forget to commit)
  $ hg st --copies
  M z
    a
  $ [ -x z ] || echo "executable bit lost"

merge them (from the chmod side)

  $ hg up -C 'desc("make a executable")'
  1 files updated, 0 files merged, 1 files removed, 0 files unresolved
  $ hg merge 'desc("rename a to z")'
  merging a and z to z
  0 files updated, 1 files merged, 0 files removed, 0 files unresolved
  (branch merge, don't forget to commit)
  $ hg st --copies
  M z
    a
  R a
  $ [ -x z ] || echo "executable bit lost"

  $ cd ..

Removing the flag
-----------------

  $ hg clone base-exec rename+mod-merge-repo-removal
  updating to branch default
  2 files updated, 0 files merged, 0 files removed, 0 files unresolved
  $ cd rename+mod-merge-repo-removal

make "a" non-executable on one side

  $ chmod -x a
  $ cat << EOF > a
  > 1
  > x
  > 3
  > 4
  > 5
  > 6
  > 7
  > 8
  > 9
  > EOF
  $ hg status
  M a
  $ hg ci -m "make a non-executable, and change start"
  $ [ -x z ] && echo "executable bit not removed"
  [1]
  $ hg up ".^"
  1 files updated, 0 files merged, 0 files removed, 0 files unresolved

make "a" renamed on the other side

  $ hg mv a z
  $ hg st --copies
  A z
    a
  R a
  $ cat << EOF > z
  > 1
  > 2
  > 3
  > 4
  > 5
  > 6
  > 7
  > x
  > 9
  > EOF
  $ hg ci -m "rename a to z, and change end"
  created new head

merge them (from the rename side)

  $ hg merge 'desc("make a non-executable")'
  merging z and a to z
  0 files updated, 1 files merged, 0 files removed, 0 files unresolved
  (branch merge, don't forget to commit)
  $ hg st --copies
  M z
    a
  $ [ -x z ] && echo "executable bit not removed"
  [1]

merge them (from the chmod side)

  $ hg up -C 'desc("make a non-executable")'
  1 files updated, 0 files merged, 1 files removed, 0 files unresolved
  $ hg merge 'desc("rename a to z")'
  merging a and z to z
  0 files updated, 1 files merged, 0 files removed, 0 files unresolved
  (branch merge, don't forget to commit)
  $ hg st --copies
  M z
    a
  R a
  $ [ -x z ] && echo "executable bit not removed"
  [1]

  $ cd ..