[merge-tools]

        i18n.executable = /path/to/scripts/i18n

        i18n.args = normalized-merge $local $base $other $output

    and then invoke merge/rebase/graft with the additional argument '--tool i18n'.

    """

    from mercurial import (

        context,

        simplemerge,

        ui as uimod,

    )

    i18n_utils._normalize_po_file(local, merge_pot_file=merge_pot_file, strip=strip)

    i18n_utils._normalize_po_file(base, merge_pot_file=merge_pot_file, strip=strip)

    i18n_utils._normalize_po_file(other, merge_pot_file=merge_pot_file, strip=strip)

    i18n_utils._normalize_po_file(output, merge_pot_file=merge_pot_file, strip=strip)

    # simplemerge will write markers to 'local' if it fails, keep a copy without markers

    localkeep = local + '.keep'

    shutil.copyfile(local, localkeep)

    ret = simplemerge.simplemerge(uimod.ui.load(),

         context.arbitraryfilectx(local.encode('utf-8')),

         context.arbitraryfilectx(base.encode('utf-8')),

         context.arbitraryfilectx(other.encode('utf-8')),

         label=[b'local', b'other', b'base'],

         mode='merge',

    )

    shutil.copyfile(local, output)  # simplemerge wrote to local - either resolved or with conflict markers

    if ret:

        shutil.copyfile(localkeep, local)

        basekeep = base + '.keep'

        otherkeep = other + '.keep'

        shutil.copyfile(base, basekeep)

        shutil.copyfile(other, otherkeep)

        sys.stderr.write('Resolve with e.g.: kdiff3 %s %s %s -o %s\n' % (basekeep, localkeep, otherkeep, output))

        sys.exit(ret)

    os.remove(localkeep)

@cli.command()

@click.argument('file1')

@click.argument('file2')

@click.option('--merge-pot-file', default=None)

@click.option('--strip/--no-strip', default=False)

def normalized_diff(file1, file2, merge_pot_file, strip):

    """Compare two files while transparently normalizing them."""