## Setup `clugenr` development

Clone the package, `cd` into to the package’s folder and start R:

    $ git clone https://github.com/clugen/clugenr.git
    $ cd clugenr

Developing `clugenr` requires devtools, thus make sure it’s installed before continuing. Open an R prompt at the `clugenr` folder and install `clugenr`’s development dependencies:

    devtools::install_dev_deps()

The package can be tested as follows:

    devtools::test()

There are four levels of testing, by increasing thoroughness (and slowness): `cran`, `ci`, `normal` and `full`. The first two run by default on CRAN and CI environments, respectively. The third one, `normal`, is the default mode when running the tests locally, and may take some time (10-20 minutes). The last one, `full` is more thorough and can take a few hours. It’s possible to define the tests thoroughness by setting the `CLUGENR_TEST_MODE` environment variable. For example, to simulate how tests would run in CRAN as follows:

    Sys.setenv(CLUGENR_TEST_MODE = "cran")
    devtools::test()
    Sys.unsetenv("CLUGENR_TEST_MODE")

The following instruction updates the documentation, then builds and checks the package locally:

    devtools::check()

It’s also possible to define the environment in which to run the tests when performing the check:

    Sys.setenv(CLUGENR_TEST_MODE = "ci")
    devtools::check()
    Sys.unsetenv("CLUGENR_TEST_MODE")

Create or update the generated documentation in `man/`, file collation and `NAMESPACE`:

    devtools::document()

Build `clugenr`’s website (requires pkgdown, ggplot2, patchwork and rgl):

    pkgdown::build_site()
    # Can also be done with devtools::build_site()
    # In either case add option `preview = F` to avoid opening the browser

Install the package locally with:

    devtools::install()

Check that it works:

    library(clugenr)
    x <- clugen(2, 5, 800, c(-1, 1), 0.6, c(4, 6), 5, 0.4, 0.5)
    plot(x$points, col = x$clusters, xlab = "x", ylab = "y", asp = 1)

## Code style

To contribute to `clugenr`, follow the tidyverse style guide. Some highlights include, but are not limited to:

- File encoding: UTF-8
- Indentation: 2 spaces (no tabs)
- Line size limit: 80 chars
- Newlines: Unix style, i.e. LF or `\n`