# Build and Install cuSpatial From Source

## Pre-requisites

- gcc >= 7.5
- cmake >= 3.26.4
- miniforge

## Fetch cuSpatial repository

```shell
export `CUSPATIAL_HOME=$(pwd)/cuspatial` && \
git clone https://github.com/rapidsai/cuspatial.git $CUSPATIAL_HOME
```
## Install dependencies

1. `export CUSPATIAL_HOME=$(pwd)/cuspatial`
2. clone the cuSpatial repo

```shell
conda env create -n cuspatial --file conda/environments/all_cuda-118_arch-x86_64.yaml
```

## Build cuSpatial

### From the cuSpatial Dev Container:

Execute `build-cuspatial-cpp` to build `libcuspatial`. The following options may be added.
 - `-DBUILD_TESTS=ON`: build `libcuspatial` unit tests.
 - `-DBUILD_BENCHMARKS=ON`: build `libcuspatial` benchmarks.
 - `-DCMAKE_BUILD_TYPE=Debug`: Create a Debug build of `libcuspatial` (default is Release).
In addition, `build-cuspatial-python` to build cuspatial cython components.

### From Bare Metal:

Compile libcuspatial (C++), cuspatial (cython) and C++ tests:
```shell
cd $CUSPATIAL_HOME && \
chmod +x ./build.sh && \
./build.sh libcuspatial cuspatial tests
```
Additionally, the following options are also commonly used:
- `benchmarks`: build libcuspatial benchmarks
- `clean`: remove all existing build artifacts and configuration
Execute `./build.sh -h` for full list of available options.

## Validate Installation with C++ and Python Tests

```{note}
To manage difference between branches and build types, the build directories are located at
`$CUSPATIAL_HOME/cpp/build/[release|debug]` depending on build type, and  `$CUSPATIAL_HOME/cpp/build/latest`.
is a symbolic link to the most recent build directory. On bare metal builds, remove the extra `latest` level in
the path below.
```

- C++ tests are located within the `$CUSPATIAL_HOME/cpp/build/latest/gtests` directory.
- Python tests are located within the `$CUSPATIAL_HOME/python/cuspatial/cuspatial/tests` directory.

Execute C++ tests:
```shell
ninja -C $CUSPATIAL_HOME/cpp/build/latest test
```

Execute Python tests:
```shell
pytest $CUSPATIAL_HOME/python/cuspatial/cuspatial/tests/
```