Detect file type based on file contents

[ElSamhaa]

The easiest way to enable this -- until implemented -- is to pass the file path/name to the functions under function_extensions for instance.

This will allow for custom logic provided by the user, based on which he can set the filetype eventually before the function returns.

Currently, this is how I do it:

local filename = vim.api.nvim_buf_get_name(0)

require("filetype").setup {
  overrides = {
    function_extensions = {
      ["yaml"] = function()
        file = io.open(filename, "r")
        filecontent = file:read("*all")
        if string.find(filecontent, "{{") then
          vim.bo.filetype = "gotexttmpl"
        end
        file.close()
      end,
    }
  },
}

But the above fails to run when opening a buffer after starting a neovim session.

[ObserverOfTime]

It should work if you place the call to nvim_buf_get_name inside the function.

[ElSamhaa]

@ObserverOfTime You're right 😅 . You can close this issue.

Do you know where the print output goes to?, It doesn't appear under with :messages.

[ObserverOfTime]

Use vim.notify instead.

[ObserverOfTime]

Also, you can use vim.api.nvim_buf_get_lines instead of manually opening the file.

[ElSamhaa]

Thanks