tests/test-remove.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)

% file not managed
not removing foo: file is untracked
? foo
./foo
0 files updated, 0 files merged, 0 files removed, 0 files unresolved
% 00 state added, options none
not removing bar: file has been marked for add (use -f to force removal)
A bar
./bar
./foo
0 files updated, 0 files merged, 0 files removed, 0 files unresolved
% 01 state clean, options none
R foo
? bar
./bar
1 files updated, 0 files merged, 0 files removed, 0 files unresolved
% 02 state modified, options none
not removing foo: file is modified (use -f to force removal)
M foo
? bar
./bar
./foo
1 files updated, 0 files merged, 0 files removed, 0 files unresolved
% 03 state missing, options none
R foo
? bar
./bar
1 files updated, 0 files merged, 0 files removed, 0 files unresolved
% 10 state added, options -f
? bar
./bar
./foo
0 files updated, 0 files merged, 0 files removed, 0 files unresolved
% 11 state clean, options -f
R foo
1 files updated, 0 files merged, 0 files removed, 0 files unresolved
% 12 state modified, options -f
R foo
1 files updated, 0 files merged, 0 files removed, 0 files unresolved
% 13 state missing, options -f
R foo
1 files updated, 0 files merged, 0 files removed, 0 files unresolved
% 20 state added, options -A
not removing bar: file still exists (use -f to force removal)
A bar
./bar
./foo
0 files updated, 0 files merged, 0 files removed, 0 files unresolved
% 21 state clean, options -A
not removing foo: file still exists (use -f to force removal)
? bar
./bar
./foo
0 files updated, 0 files merged, 0 files removed, 0 files unresolved
% 22 state modified, options -A
not removing foo: file still exists (use -f to force removal)
M foo
? bar
./bar
./foo
1 files updated, 0 files merged, 0 files removed, 0 files unresolved
% 23 state missing, options -A
R foo
? bar
./bar
1 files updated, 0 files merged, 0 files removed, 0 files unresolved
% 30 state added, options -Af
? bar
./bar
./foo
0 files updated, 0 files merged, 0 files removed, 0 files unresolved
% 31 state clean, options -Af
R foo
./foo
1 files updated, 0 files merged, 0 files removed, 0 files unresolved
% 32 state modified, options -Af
R foo
./foo
1 files updated, 0 files merged, 0 files removed, 0 files unresolved
% 33 state missing, options -Af
R foo
1 files updated, 0 files merged, 0 files removed, 0 files unresolved
adding test/bar
adding test/foo
% dir, options none
removing test/bar
removing test/foo
R test/bar
R test/foo
./foo
2 files updated, 0 files merged, 0 files removed, 0 files unresolved
% dir, options -f
removing test/bar
removing test/foo
R test/bar
R test/foo
./foo
2 files updated, 0 files merged, 0 files removed, 0 files unresolved
% dir, options -A
not removing test/foo: file still exists (use -f to force removal)
removing test/bar
R test/bar
./foo
./test/foo
1 files updated, 0 files merged, 0 files removed, 0 files unresolved
% dir, options -Af
removing test/bar
removing test/foo
R test/bar
R test/foo
./foo
./test/foo
2 files updated, 0 files merged, 0 files removed, 0 files unresolved
test remove dropping empty trees (issue1861)
adding issue1861/b/c/y
adding issue1861/x
removing issue1861/b/c/y
x