1877 

  1877 

  1878     This function returns an iterator yielding contexts. Before

  1878     This function returns an iterator yielding contexts. Before

  1879     yielding each context, the iterator will first call the prepare

  1879     yielding each context, the iterator will first call the prepare

  1880     function on each context in the window in forward order.'''

  1880     function on each context in the window in forward order.'''

  1881 

  1881 

  1883     follow = opts.get('follow') or opts.get('follow_first')

  1883     follow = opts.get('follow') or opts.get('follow_first')

  1884     revs = _walkrevs(repo, opts)

  1884     revs = _walkrevs(repo, opts)

  1885     if not revs:

  1885     if not revs:

  1886         return []

  1886         return []

  1887     if allfiles and len(revs) > 1:

  1887     if allfiles and len(revs) > 1:

  1889     wanted = set()

  1890     wanted = set()

  1890     slowpath = match.anypats() or (not match.always() and opts.get('removed'))

  1891     slowpath = match.anypats() or (not match.always() and opts.get('removed'))

  1891     fncache = {}

  1892     fncache = {}

  1892     change = repo.__getitem__

  1893     change = repo.__getitem__

  1893 

  1894