tests/test-revlog-ancestry.py

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

from __future__ import absolute_import, print_function
import os
from mercurial import (
    hg,
    merge,
    ui as uimod,
)

u = uimod.ui.load()

repo = hg.repository(u, b'test1', create=1)
os.chdir('test1')

def commit(text, time):
    repo.commit(text=text, date=b"%d 0" % time)

def addcommit(name, time):
    f = open(name, 'wb')
    f.write(b'%s\n' % name)
    f.close()
    repo[None].add([name])
    commit(name, time)

def update(rev):
    merge.update(repo, rev, branchmerge=False, force=True)

def merge_(rev):
    merge.update(repo, rev, branchmerge=True, force=False)

if __name__ == '__main__':
    addcommit(b"A", 0)
    addcommit(b"B", 1)

    update(0)
    addcommit(b"C", 2)

    merge_(1)
    commit(b"D", 3)

    update(2)
    addcommit(b"E", 4)
    addcommit(b"F", 5)

    update(3)
    addcommit(b"G", 6)

    merge_(5)
    commit(b"H", 7)

    update(5)
    addcommit(b"I", 8)

    # Ancestors
    print('Ancestors of 5')
    for r in repo.changelog.ancestors([5]):
        print(r, end=' ')

    print('\nAncestors of 6 and 5')
    for r in repo.changelog.ancestors([6, 5]):
        print(r, end=' ')

    print('\nAncestors of 5 and 4')
    for r in repo.changelog.ancestors([5, 4]):
        print(r, end=' ')

    print('\nAncestors of 7, stop at 6')
    for r in repo.changelog.ancestors([7], 6):
        print(r, end=' ')

    print('\nAncestors of 7, including revs')
    for r in repo.changelog.ancestors([7], inclusive=True):
        print(r, end=' ')

    print('\nAncestors of 7, 5 and 3, including revs')
    for r in repo.changelog.ancestors([7, 5, 3], inclusive=True):
        print(r, end=' ')

    # Descendants
    print('\n\nDescendants of 5')
    for r in repo.changelog.descendants([5]):
        print(r, end=' ')

    print('\nDescendants of 5 and 3')
    for r in repo.changelog.descendants([5, 3]):
        print(r, end=' ')

    print('\nDescendants of 5 and 4')
    print(*repo.changelog.descendants([5, 4]), sep=' ')