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etalab / transport-site

Rendre disponible, valoriser et améliorer les données transports
https://transport.data.gouv.fr
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How to use apps/transport/lib/transport/gtfs_diff.ex? #3981

Closed dancesWithCycles closed 1 week ago

dancesWithCycles commented 3 weeks ago

Hi folks, Thank you so much for providing and maintaining this repository.

I randomly stumbled over this readme file that leaded me to this source file.

It is the first time I come across Elixir. Do you mind providing an instruction set that describes how to use the GTFS Diff tool from scratch imagining a clear Linux operating system environment?

Example:

orThis issue is linked to this issue.

git clone https://aur.archlinux.org/asdf-vm.git && cd asdf-vm && makepkg -si


Add the following to ~/.bashrc:
```shell

. "$HOME/.asdf/asdf.sh"

Completions must be configured by adding the following to your .bashrc:


. "$HOME/.asdf/completions/asdf.bash"

This issue is linked to this issue.

Cheers!

thbar commented 3 weeks ago

Hi @dancesWithCycles! Thanks for the issue :smile:

It is the first time I come across Elixir. Do you mind providing an instruction set that describes how to use the GTFS Diff tool from scratch imagining a clear Linux operating system environment?

I would need to verify my understanding: are you asking for help on the tool, or you do not need help and instead are suggesting an improvement on the documentation?

Thanks!

dancesWithCycles commented 3 weeks ago

Hi @thbar , Thx for asking for clarification. Indeed, I am asking for both. An extension to the documentation with the instruction set to install the dependencies and use the tool in a clean Linux (e.g. GNU/Debian) environment would help me to run the GTFS Diff tool. But it also would help others that miss a running Elixir environment on hand. Of course, a more complete documentation would help everyone.

Cheers!

thbar commented 3 weeks ago

Thanks for the clarification @dancesWithCycles!

After a long day, coming back with some points: one must note that the current implementation of GTFS-Diff does not scale well (this is why there is a 10MB limit on https://transport.data.gouv.fr/tools/gtfs_diff).

This means we are not going to put a lot of effort in the documentation (it will likely change if we optimise the algorithm later).

I will see if I can tweak things in a few lines to make things work from a script, and provide guidance here (because mix cmd --app apps/transport/lib/transport/gtfs_diff.ex will not work currently unless I'm mistaken).

I'll keep that issue opened for now, thanks for your patience.

thbar commented 1 week ago

@dancesWithCycles thanks for the delay. Our bandwidth is too tight to properly manage that, so I will have to close the issue for now. Sorry about that, as we manage a lot of topics!