1 # Setting up Nominatim for Development
3 This chapter gives an overview how to set up Nominatim for development
7 This guide assumes you develop under the latest version of Debian/Ubuntu.
8 You can of course also use your favourite distribution. You just might have
9 to adapt the commands below slightly, in particular the commands for
10 installing additional software.
12 ## Installing Nominatim
14 The first step is to install Nominatim itself. Please follow the installation
15 instructions in the [Admin section](../admin/Installation.md). You don't need
16 to set up a webserver for development, the webserver that can be started
17 via `nominatim serve` is sufficient.
19 If you want to run Nominatim in a VM via Vagrant, use the default `ubuntu24` setup.
20 Vagrant's libvirt provider runs out-of-the-box under Ubuntu. You also need to
21 install an NFS daemon to enable directory sharing between host and guest. The
22 following packages should get you started:
24 sudo apt install vagrant vagrant-libvirt libvirt-daemon nfs-kernel-server
26 ## Prerequisites for testing and documentation
28 The Nominatim test suite consists of behavioural tests (using behave) and
29 unit tests (using pytest). It has the following additional requirements:
31 * [behave test framework](https://behave.readthedocs.io) >= 1.2.6
32 * [Pylint](https://pylint.org/) (CI always runs the latest version from pip)
33 * [mypy](http://mypy-lang.org/) (plus typing information for external libs)
34 * [Python Typing Extensions](https://github.com/python/typing_extensions) (for Python < 3.9)
35 * [pytest](https://pytest.org)
36 * [pytest-asyncio](https://pytest-asyncio.readthedocs.io)
38 For testing the Python search frontend, you need to install extra dependencies
39 depending on your choice of webserver framework:
41 * [httpx](https://www.python-httpx.org/) (Starlette only)
42 * [asgi-lifespan](https://github.com/florimondmanca/asgi-lifespan) (Starlette only)
44 The documentation is built with mkdocs:
46 * [mkdocs](https://www.mkdocs.org/) >= 1.1.2
47 * [mkdocstrings](https://mkdocstrings.github.io/) >= 0.25
48 * [mkdocs-material](https://squidfunk.github.io/mkdocs-material/)
49 * [mkdocs-gen-files](https://oprypin.github.io/mkdocs-gen-files/)
51 Please be aware that tests always run against the globally installed
52 osm2pgsql, so you need to have this set up. If you want to test against
53 the vendored version of osm2pgsql, you need to set the PATH accordingly.
55 ### Installing prerequisites on Ubuntu/Debian
57 The Python tools should always be run with the most recent version.
58 In particular, pylint tends to have a lot of breaking changes between versions.
59 The easiest way, to handle these Python dependencies is to run your
60 development from within a virtual environment.
63 sudo apt install libsqlite3-mod-spatialite
66 To set up the virtual environment with all necessary packages run:
69 virtualenv ~/nominatim-dev-venv
70 ~/nominatim-dev-venv/bin/pip install\
71 psutil psycopg[binary] PyICU SQLAlchemy \
72 python-dotenv jinja2 pyYAML datrie behave \
73 mkdocs mkdocstrings mkdocs-gen-files pytest pytest-asyncio pylint \
74 types-jinja2 types-markupsafe types-psutil types-psycopg2 \
75 types-pygments types-pyyaml types-requests types-ujson \
76 types-urllib3 typing-extensions unicorn falcon starlette \
77 uvicorn mypy osmium aiosqlite
80 Now enter the virtual environment whenever you want to develop:
83 . ~/nominatim-dev-venv/bin/activate
86 ### Running Nominatim during development
88 The source code for Nominatim can be found in the `src` directory and can
89 be run in-place. The source directory features a special script
90 `nominatim-cli.py` which does the same as the installed 'nominatim' binary
91 but executes against the code in the source tree. For example:
94 me@machine:~$ cd Nominatim
95 me@machine:~Nominatim$ ./nominatim-cli.py --version
96 Nominatim version 4.4.99-1
99 Make sure you have activated the virtual environment holding all
100 necessary dependencies.
104 All tests are located in the `/test` directory.
106 To run all tests, run make from the source root:
112 There are also make targets for executing only parts of the test suite.
113 For example to run linting only use:
119 The possible testing targets are: mypy, lint, pytest, bdd.
121 For more information about the structure of the tests and how to change and
122 extend the test suite, see the [Testing chapter](Testing.md).
124 ## Documentation Pages
126 The [Nominatim documentation](https://nominatim.org/release-docs/develop/) is
127 built using the [MkDocs](https://www.mkdocs.org/) static site generation
128 framework. The master branch is automatically deployed every night on
129 [https://nominatim.org/release-docs/develop/](https://nominatim.org/release-docs/develop/)
131 To build the documentation run
138 For local testing, you can start webserver:
141 build> make serve-doc
142 [server:296] Serving on http://127.0.0.1:8000
143 [handlers:62] Start watching changes
146 If you develop inside a Vagrant virtual machine, use a port that is forwarded
150 build> mkdocs serve --dev-addr 0.0.0.0:8088
151 [server:296] Serving on http://0.0.0.0:8088
152 [handlers:62] Start watching changes