perf: fix perfrevlogrevisions --reverse
Currently, 'endrev' equals `len(revlog)`, a revision that does not exist.
When asking for the reverse order, the arguments passed to xrange are
`xrange(len(revlog), startrev)` which then crash.
We need to offset 'endrev' by one so we don't crash anymore. Also, we offset
'startrev' to ensure we get the same number of revisions with and without the
`--reverse` option.
Differential Revision: https://phab.mercurial-scm.org/D5228
Test applying context diffs
$ cat > writepatterns.py <<EOF
> import sys
>
> path = sys.argv[1]
> lasteol = sys.argv[2] == '1'
> patterns = sys.argv[3:]
>
> fp = open(path, 'wb')
> for i, pattern in enumerate(patterns):
> count = int(pattern[0:-1])
> char = pattern[-1].encode('utf8') + b'\n'
> if not lasteol and i == len(patterns) - 1:
> fp.write((char*count)[:-1])
> else:
> fp.write(char*count)
> fp.close()
> EOF
$ cat > cat.py <<EOF
> import sys
> from mercurial import pycompat
> from mercurial.utils import stringutil
> pycompat.stdout.write(b'%s\n'
> % stringutil.pprint(open(sys.argv[1], 'rb').read()))
> EOF
Initialize the test repository
$ hg init repo
$ cd repo
$ "$PYTHON" ../writepatterns.py a 0 5A 1B 5C 1D
$ "$PYTHON" ../writepatterns.py b 1 1A 1B
$ "$PYTHON" ../writepatterns.py c 1 5A
$ "$PYTHON" ../writepatterns.py d 1 5A 1B
$ hg add
adding a
adding b
adding c
adding d
$ hg ci -m addfiles
Add file, missing a last end of line
$ hg import --no-commit - <<EOF
> *** /dev/null 2010-10-16 18:05:49.000000000 +0200
> --- b/newnoeol 2010-10-16 18:23:26.000000000 +0200
> ***************
> *** 0 ****
> --- 1,2 ----
> + a
> + b
> \ No newline at end of file
> *** a/a Sat Oct 16 16:35:51 2010
> --- b/a Sat Oct 16 16:35:51 2010
> ***************
> *** 3,12 ****
> A
> A
> A
> ! B
> C
> C
> C
> C
> C
> ! D
> \ No newline at end of file
> --- 3,13 ----
> A
> A
> A
> ! E
> C
> C
> C
> C
> C
> ! F
> ! F
>
> *** a/b 2010-10-16 18:40:38.000000000 +0200
> --- /dev/null 2010-10-16 18:05:49.000000000 +0200
> ***************
> *** 1,2 ****
> - A
> - B
> --- 0 ----
> *** a/c Sat Oct 16 21:34:26 2010
> --- b/c Sat Oct 16 21:34:27 2010
> ***************
> *** 3,5 ****
> --- 3,7 ----
> A
> A
> A
> + B
> + B
> *** a/d Sat Oct 16 21:47:20 2010
> --- b/d Sat Oct 16 21:47:22 2010
> ***************
> *** 2,6 ****
> A
> A
> A
> - A
> - B
> --- 2,4 ----
> EOF
applying patch from stdin
$ hg st
M a
M c
M d
A newnoeol
R b
What's in a
$ "$PYTHON" ../cat.py a
'A\nA\nA\nA\nA\nE\nC\nC\nC\nC\nC\nF\nF\n'
$ "$PYTHON" ../cat.py newnoeol
'a\nb'
$ "$PYTHON" ../cat.py c
'A\nA\nA\nA\nA\nB\nB\n'
$ "$PYTHON" ../cat.py d
'A\nA\nA\nA\n'
$ cd ..