processor: pass locale to subprocesses

[joshmoore]

Neither setting the values globally on the server (or
in the docker container) nor setting them on OMERO start
up suffices to set the values in scripts.

cc: @will-moore

[manics]

Seems to work on py3-ci:

#!/usr/bin/env python
# -*- coding: utf-8 -*-
from omero.gateway import BlitzGateway
import omero.clients  # noqa
from omero.rtypes import rlong, rstring
from omero.model import ImageAnnotationLinkI, ImageI
import omero.scripts as scripts
import omero.util.script_utils as script_utils
import logging

logger = logging.getLogger('test_unicode')


def process_images(conn, script_params):

    fanns = []
    message = ""
    images, log_message = script_utils.get_objects(conn, script_params)
    message += log_message
    for image in images:
        text = ''.join(c if c.isalnum() else '_' for c in image.getName())
        message += 'ID:{} {}\n'.format(image.getId(), text)
        output = '{}.txt'.format(text)
        with open(output, 'w') as f:
            f.write(text)
        fann = conn.createFileAnnfromLocalFile(output, mimetype="text/plain")
        if image.canAnnotate():
            message += '  Attached file\n'
            link = ImageAnnotationLinkI()
            link.parent = ImageI(image.getId(), False)
            link.child = fann._obj
            link = conn.getUpdateService().saveAndReturnObject(link)
        else:
            message += '  Unable to attach file\n'
        fanns.append(fann)

    return fanns, message


def run_script():
    """
    The main entry point of the script, as called by the client via the
    scripting service, passing the required parameters.
    """

    client = scripts.client(
        'Test_Unicode.py',
        'Create a file with the name of the image (which may be unicode) and attach it',

        scripts.String(
            "Data_Type", optional=False, grouping="1",
            description="The data you want to work with.", values=[rstring('Image')],
            default="Image"),
        scripts.List(
            "IDs", optional=False, grouping="2",
            description="List of Image IDs to process.").ofType(rlong(0)),

        version="0.0.1",
        authors=["OME Team"],
        institutions=["University of Dundee"],
        contact="ome-users@lists.openmicroscopy.org.uk",
    )

    try:
        script_params = client.getInputs(unwrap=True)
        conn = BlitzGateway(client_obj=client)
        file_anns, message = process_images(conn, script_params)
        client.setOutput("Message", rstring(message))

    finally:
        client.closeSession()


if __name__ == "__main__":
    run_script()