Made ORSTools ready for qgis_process

[jannefleischer]

Because I need to run our plugin OS-WALK-EU (which depends on isocrone calculations from ORStools) from within a qgis_process setup headless I needed some upstream changes:

1. moved the initiation of the processing toolbox to initProcessing, so qgis_process can skip everything with a GUI involved
2. Added some recasting of parameters to int, because qgis_process interprets numbers as strings...
3. Added an configuration-processing-algorithm (so my headless machine can have a custom provider). Added a test to that, but never done tests before (just a urban planner doing some programming...)

Now I can run something like this from the command line:

qgis_process plugins enable "ORStools" && qgis_process run "ORS Tools:set_provider_config_to_ors_via_algorithm" -- distance_units=meters area_units=m2 ellipsoid=EPSG:7019 ors_provider_name=ors.onmyserver.de ors_provider_api_key= ors_provider_url=https://ors.onmyserver.de ors_provider_timeout=240 ors_provider_overwrite=true

followed by:

echo '{                                                                                                            
        "distance_units": "meters", 
        "area_units": "m2",
        "ellipsoid": "EPSG:7019",
        "inputs": {
                "INPUT_PROVIDER": 1,
                "INPUT_PROFILE": 0,
                "INPUT_POINT_LAYER": "/home/fleischer/srv-fs1/u/02_Code_Working_Trees/os-walk-eu/SampleData/SampleGrid_centroids.shp",
                "INPUT_FIELD": "GRD_ID",
                "INPUT_METRIC": 1,
                "INPUT_RANGES": "250,500,750,1000",
                "LOCATION_TYPE": 0,
                "INPUT_SMOOTHING": 0,
                "INPUT_AVOID_FEATURES": [],
                "INPUT_AVOID_COUNTRIES": null,
                "INPUT_AVOID_BORDERS": null,
                "OUTPUT": "/home/fleischer/srv-fs1/u/02_Code_Working_Trees/os-walk-eu/SampleData/SampleGrid_centroid_isochrones_orstools.shp"
    }
}' | qgis_process run "ORS Tools:isochrones_from_layer" -

Due to None/null-Values and [] as parameters, only the json-piping is working.

[koebi]

Hey,
thanks a lot for the contribution!

I had a quick look at everything but the new processing algorithm - will have to look at that one in detail :)

[jannefleischer]

Thanks for the feedback, removed old stuff.

[merydian]

Hi, this would be a really cool feature to have I think. I would however be -1 on introducing three new processing algorithms for this sole reason. @koebi proposed to hide the new processing algorithms from the toolbox. Could you have a look at how that would work?

Otherwise I'd also be open for a video call to discuss details if you would like.

[jannefleischer]

Well, I understand that adding three (rather trivial) algorithms would somewhat bloat the plugin, though if you really want to run qgis headless you need a way to configure the configuration (e.g. add a custom service if you want to use one).

I run this from a jupyterhub child container with obviously no way of accessing a UI. So from my perspective the addition of a configuration via processing toolbox is a must. Deletion and getting ID isn't. But would be easier to use, I think.

Though currently it isn't beautiful that there are (somewhat) double structures to modify config. Maybe modify gui to use the processing tool internally, too. To safe code lines.

Edit: A, now I understand what you are saying. I'll check how to useHideFromToolbox-flag...

[jannefleischer]

So, I have hidden the algorithms now. Though should be documented somewhere that they exist?

[jannefleischer]

@koebi Anything to be done before merged?

[koebi]

Hey,
thanks a lot for your continuous work :)

So, I have hidden the algorithms now. Though should be documented somewhere that they exist?
Yep :) We are currently re-working our plugin documentation, #308 is there to keep track of some ToDos.

Do you have any idea why the tests do not run completely?

[jannefleischer]

I have absolutely no clue. And if I initiate them locally I almost instantly hit my apikey-limit. So sadly I am no help here :/ .