comparison mercurial/util.py @ 48010:ae79611e3115

util: avoid a name-error warning in the `mmapread` exception handler

Newly caught by pytype 2021-09-09.

    File "/mnt/c/Users/Matt/hg/mercurial/util.py", line 458, in mmapread: Name 'fd' is not defined [name-error]

Differential Revision: https://phab.mercurial-scm.org/D11470

48009:94d4a3f78e99

        # size of 0 to mmap.mmap() means "all data"
        # rather than "zero bytes", so special case that.
        return b''
    elif size is None:
        size = 0
    try:
        fd = getattr(fp, 'fileno', lambda: fp)()
        return mmap.mmap(fd, size, access=mmap.ACCESS_READ)
    except ValueError:
        # Empty files cannot be mmapped, but mmapread should still work.  Check
        # if the file is empty, and if so, return an empty buffer.
        if os.fstat(fd).st_size == 0:

48010:ae79611e3115

        # size of 0 to mmap.mmap() means "all data"
        # rather than "zero bytes", so special case that.
        return b''
    elif size is None:
        size = 0
    fd = getattr(fp, 'fileno', lambda: fp)()
    try:
        return mmap.mmap(fd, size, access=mmap.ACCESS_READ)
    except ValueError:
        # Empty files cannot be mmapped, but mmapread should still work.  Check
        # if the file is empty, and if so, return an empty buffer.
        if os.fstat(fd).st_size == 0: