mapcomplete/Docs/Development_deployment.md

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Development and deployment
==========================
There are various scripts to help setup MapComplete for deployment and develop-deployment.
This documents attempts to shed some light on these scripts.
Note: these scripts change every now and then - if the documentation here is incorrect or you run into troubles, do leave a message in [the issue tracker](https://github.com/pietervdvn/MapComplete/issues)
Architecture overview
---------------------
At its core, MapComplete is a static (!) website. There are no servers to host.
The data is fetched from Overpass/OSM/Wikidata/Wikipedia/Mapillary/... and written there directly. This means that any static file server will do to create a self-hosted version of MapComplete.
Development
-----------
**Windows users**: All scripts are made for linux devices. Use the Ubuntu terminal for Windows (or even better - make the switch ;) )
To develop and build MapComplete, yo
0. Make sure you have a recent version of nodejs - at least 12.0, preferably 15
0. Make a fork and clone the repository.
1. Install `npm`. Linux: `sudo apt install npm` (or your favourite package manager), Windows: install nodeJS: https://nodejs.org/en/download/
2. Run `npm install` to install the package dependencies
3. Run `npm run init` and generate some additional dependencies and generated files
4. Run `npm run start` to host a local testversion at http://localhost:1234/index.html
5. By default, a landing page with available themes is served. In order to load a single theme, use `layout=themename` or `userlayout=true#<layout configuration>` as [Query parameter](URL_Parameters.md). Note that the shorter URLs (e.g. `bookcases.html`, `aed.html`, ...) _don't_ exist on the development version.
Deploying a fork
----------------
A script creates a webpage for every theme automatically, with some customizations in order to:
- to have shorter urls
- have individual social images
- have individual web manifests
This script can be invoked with `npm run prepare-deploy`
If you want to deploy your fork:
0. `npm run prepare-deploy`
1. `npm run build`
2. Copy the entire `dist` folder to where you host your website. Visiting `index.html` gives you the landing page, visiting `yourwebsite/<theme>` should bring you to the appropriate theme.
Weird errors
------------
Try removing `node_modules`, `package-lock.json` and `.cache`
Overview of package.json-scripts
--------------------------------
- `increase-memory`: this is a big (and memory-intensive) project to build and run, so we give nodejs some more RAM.
- `start`: start a development server.
- `test`: run the unit tests
- `init`: Generates and downloads various assets which are needed to compile
- `generate:editor-layer-index`: downloads the editor-layer-index-json from osmlab.github.io
- `generate:images`: compiles the SVG's into an asset
- `generate:translations`: compiles the translation file into a javascript file
- `generate:layouts`: uses `index.html` as template to create all the theme index pages. You'll want to run `clean` when done
- `generate:docs`: generates various documents, such as information about available metatags, information to put on the [OSM-wiki](https://wiki.openstreetmap.org/wiki/MapComplete),...
- `generate:report`: downloads statistics from OsmCha, compiles neat graphs
- `generate:cache:speelplekken`: creates an offline copy of all the data required for one specific (paid for) theme
- `generate:layeroverview`: reads all the theme- and layerconfigurations, compiles them into a single JSON.
- `reset:layeroverview`: if something is wrong with the layeroverview, creates an empty one
- `generate:licenses`: compiles all the license info of images into a single json
- `optimize:images`: attempts to make smaller pngs - optional to run before a deployment
- `generate`: run all the necesary generate-scripts
- `build`: actually bundle all the files into a single `dist/`-folder
- `prepare-deploy`: create the layouts
- `deploy:staging`,`deploy:pietervdvn`, `deploy:production`: deploy the latest code on various locations
- `lint`: get depressed by the amount of warnings
- `clean`: remove some generated files which are annoying in the repo