tests/test-up-local-change.out

findrenames: Optimise "addremove -s100" by matching files by their SHA1 hashes.

We speed up 'findrenames' for the usecase when a user specifies they
want a similarity of 100% by matching files by their exact SHA1 hash
value. This reduces the number of comparisons required to find exact
matches from O(n^2) to O(n).

While it would be nice if we could just use mercurial's pre-calculated
SHA1 hash for existing files, this hash includes the file's ancestor
information making it unsuitable for our purposes. Instead, we calculate
the hash of old content from scratch.

The following benchmarks were taken on the current head of crew:

addremove 100% similarity:
  rm -rf *; hg up -C; mv tests tests.new
  hg --time addremove -s100 --dry-run

  before:  real 176.350 secs (user 128.890+0.000 sys 47.430+0.000)
  after:   real   2.130 secs (user   1.890+0.000 sys  0.240+0.000)

addremove 75% similarity:
  rm -rf *; hg up -C; mv tests tests.new; \
      for i in tests.new/*; do echo x >> $i; done
  hg --time addremove -s75  --dry-run

  before: real 264.560 secs (user 215.130+0.000 sys 49.410+0.000)
  after:  real 218.710 secs (user 172.790+0.000 sys 45.870+0.000)

adding a
updating to branch default
1 files updated, 0 files merged, 0 files removed, 0 files unresolved
0 files updated, 0 files merged, 0 files removed, 0 files unresolved
diff -r 33aaa84a386b a
--- a/a
+++ b/a
@@ -1,1 +1,1 @@
-a
+abc
adding b
M a
changeset:   0:33aaa84a386b
user:        test
date:        Mon Jan 12 13:46:40 1970 +0000
summary:     1

  searching for copies back to rev 1
  unmatched files in other:
   b
resolving manifests
 overwrite False partial False
 ancestor 33aaa84a386b local 33aaa84a386b+ remote 802f095af299
 a: versions differ -> m
 b: remote created -> g
preserving a for resolve of a
update: a 1/2 files (50.00%)
picked tool 'true' for a (binary False symlink False)
merging a
my a@33aaa84a386b+ other a@802f095af299 ancestor a@33aaa84a386b
update: b 2/2 files (100.00%)
getting b
1 files updated, 1 files merged, 0 files removed, 0 files unresolved
changeset:   1:802f095af299
tag:         tip
user:        test
date:        Mon Jan 12 13:46:40 1970 +0000
summary:     2

resolving manifests
 overwrite False partial False
 ancestor 802f095af299 local 802f095af299+ remote 33aaa84a386b
 a: versions differ -> m
 b: other deleted -> r
preserving a for resolve of a
update: b 1/2 files (50.00%)
removing b
update: a 2/2 files (100.00%)
picked tool 'true' for a (binary False symlink False)
merging a
my a@802f095af299+ other a@33aaa84a386b ancestor a@802f095af299
0 files updated, 1 files merged, 1 files removed, 0 files unresolved
changeset:   0:33aaa84a386b
user:        test
date:        Mon Jan 12 13:46:40 1970 +0000
summary:     1

abort: there is nothing to merge - use "hg update" instead
failed
changeset:   0:33aaa84a386b
user:        test
date:        Mon Jan 12 13:46:40 1970 +0000
summary:     1

  searching for copies back to rev 1
  unmatched files in other:
   b
resolving manifests
 overwrite False partial False
 ancestor 33aaa84a386b local 33aaa84a386b+ remote 802f095af299
 a: versions differ -> m
 b: remote created -> g
preserving a for resolve of a
update: a 1/2 files (50.00%)
picked tool 'true' for a (binary False symlink False)
merging a
my a@33aaa84a386b+ other a@802f095af299 ancestor a@33aaa84a386b
update: b 2/2 files (100.00%)
getting b
1 files updated, 1 files merged, 0 files removed, 0 files unresolved
changeset:   1:802f095af299
tag:         tip
user:        test
date:        Mon Jan 12 13:46:40 1970 +0000
summary:     2

changeset:   1:802f095af299
tag:         tip
user:        test
date:        Mon Jan 12 13:46:40 1970 +0000
files:       a b
description:
2


changeset:   0:33aaa84a386b
user:        test
date:        Mon Jan 12 13:46:40 1970 +0000
files:       a
description:
1


diff -r 802f095af299 a
--- a/a
+++ b/a
@@ -1,1 +1,1 @@
-a2
+abc
1 files updated, 0 files merged, 1 files removed, 0 files unresolved
adding b
created new head
M a
changeset:   1:802f095af299
user:        test
date:        Mon Jan 12 13:46:40 1970 +0000
summary:     2

abort: crosses branches (use 'hg merge' to merge or use 'hg update -C' to discard changes)
failed
abort: outstanding uncommitted changes (use 'hg status' to list changes)
failed
  searching for copies back to rev 1
resolving manifests
 overwrite False partial False
 ancestor 33aaa84a386b local 802f095af299+ remote 030602aee63d
 a: versions differ -> m
 b: versions differ -> m
preserving a for resolve of a
preserving b for resolve of b
update: a 1/2 files (50.00%)
picked tool 'true' for a (binary False symlink False)
merging a
my a@802f095af299+ other a@030602aee63d ancestor a@33aaa84a386b
update: b 2/2 files (100.00%)
picked tool 'true' for b (binary False symlink False)
merging b
my b@802f095af299+ other b@030602aee63d ancestor b@000000000000
0 files updated, 2 files merged, 0 files removed, 0 files unresolved
(branch merge, don't forget to commit)
changeset:   1:802f095af299
user:        test
date:        Mon Jan 12 13:46:40 1970 +0000
summary:     2

changeset:   2:030602aee63d
tag:         tip
parent:      0:33aaa84a386b
user:        test
date:        Mon Jan 12 13:46:40 1970 +0000
summary:     3

diff -r 802f095af299 a
--- a/a
+++ b/a
@@ -1,1 +1,1 @@
-a2
+abc
adding a
pulling from ../a
requesting all changes
adding changesets
adding manifests
adding file changes
added 1 changesets with 1 changes to 1 files
1 files updated, 0 files merged, 0 files removed, 0 files unresolved