This commit adds support for R with roxygen2 annotations

[RufusVijayaratnam]

fixes #216
Always adds 'return' tag.

• R always returns a value, even with no return statement, and even if you call invisible(...) at the end of the function. Always adds 'export' tag
• Export tag added because it is easier to delete a line then type "#'" as for most people I expect the single quote will autoclose

[KevinFalzone]

I encountered an issue with your code. I had to rename the file from R.lua to r.lua. It's also possible to write it like this if you want to keep R.lua:

require('neogen').setup({
  languages = {
    ['r'] = require('neogen.configurations.R')
  }
})

[RufusVijayaratnam]

@KevinFalzone Can you please share how you have installed / are configuring neogen? Using Lazy.nvim I have the following (using my fork for now):

return {
  'RufusVijayaratnam/neogen',
    -- dir = vim.fn.expand("~/dev/neogen"),
    config = true,
    dependencies = { 'nvim-treesitter/nvim-treesitter', 'nvim-treesitter/playground' },
    cmd = "Neogen",
}

And this functions correctly if I open an R file an run the command :Neogen which results in:

#' @title
#' @description
#' @param x
#' @param y
#' @param ...
#' @return
#' @export
myfunc <- function(x, y, ...) {
    return(x + y)
}

[KevinFalzone]

@KevinFalzone Can you please share how you have installed / are configuring neogen? Using Lazy.nvim I have the following (using my fork for now):

return {
  'RufusVijayaratnam/neogen',
    -- dir = vim.fn.expand("~/dev/neogen"),
    config = true,
    dependencies = { 'nvim-treesitter/nvim-treesitter', 'nvim-treesitter/playground' },
    cmd = "Neogen",
}

And this functions correctly if I open an R file an run the command :Neogen which results in:

#' @title
#' @description
#' @param x
#' @param y
#' @param ...
#' @return
#' @export
myfunc <- function(x, y, ...) {
    return(x + y)
}

Here is my config :

lazy.lua:

    {
      'danymat/neogen',
      commit = "7528bea"
    }

plugins/neogen.lua:

require('neogen').setup({})

For me, the problem is due to the file type, which is r and not R and the filename should be r and not R.

[RufusVijayaratnam]

@KevinFalzone

Apologies for the delay, you are absolutely right.

I had tested only on macOS, which brief research indicates uses a case insensitive file system. Testing on Ubuntu demonstrated the issue. I have renamed the file as suggested.