user defined command should be sourced every time at startup - neovim - vim

Question

I'm using Neovim and have the following line in my .init.vim:
command! FZF FloatermNew fzf
It only takes effect if I source $MYVIMRC file every time at startup with :so $MYVIMRC command otherwise it doesn't work.
.init.vim
call plug#begin('~/.config/nvim/plugged')
" Plugins will go here in the middle."
Plug 'junegunn/fzf', { 'dir': '~/.fzf', 'do': './install --all' }
Plug 'neoclide/coc.nvim', {'branch': 'release'}
Plug 'junegunn/fzf.vim'
Plug 'voldikss/vim-floaterm'
Plug 'vim-airline/vim-airline'
Plug 'vim-airline/vim-airline-themes'
Plug 'arcticicestudio/nord-vim'
Plug 'scrooloose/nerdtree'
Plug 'itchyny/lightline.vim'
Plug 'fatih/vim-go'
"Plug 'Valloric/YouCompleteMe', { 'do': './install.py --clangd-completer' }
Plug 'Raimondi/delimitMate'
Plug 'sonph/onehalf', {'rtp': 'vim/'}
call plug#end()
source $HOME/.config/nvim/plug-config/floaterm.vim
command! FZF FloatermNew fzf
" now commands are not case-sensitive and write them and hit the tab for
" completion
set ignorecase
"theme
colorscheme nord
set termguicolors
let g:lightline = {'colorscheme': 'deus'}
syntax on
if !exists("g:syntax_on")
syntax enable
endif
" Plugins settings
let g:go_fmt_command = "goimports"
let g:go_list_type = "quickfix"
"Golang
let g:go_auto_type_info = 1
let g:go_gocode_unimported_packages = 1
set updatetime=100
let g:go_gopls_complete_unimported = 1
"set completeopt-=preview
"let g:ycm_autoclose_preview_window_after_completion = 1
" ######### Coc Configs #########
" ######### Airline Configs #########
let g:airline_theme='deus'
let g:airline#extensions#tabline#enabled = 1
let g:airline#extensions#tabline#left_sep = ' '
let g:airline#extensions#tabline#left_alt_sep = '|'
" ######### FZF Configs #########
"line number
set number
"Auto-save before make command
set autowrite
"Custom key maps
map <F4> :w<CR>:!make<CR>
"without defining run target in Makefile
"map <F4> :w<CR>:!make && make run<CR>
"How can I open a NERDTree automatically when vim starts up?
"autocmd vimenter * NERDTree
"How can I close vim if the only window left open is a NERDTree?
autocmd bufenter * if (winnr("$") == 1 && exists("b:NERDTree") && b:NERDTree.isTabTree()) | q | endif
"focus on right window instead of nerdtree
au VimEnter * wincmd l
map <C-f> :NERDTreeFocus<CR>
"remove tilde for empty lines.
set fcs=eob:\
set tabstop=4
set softtabstop=4
set shiftwidth=4
set noexpandtab
"show a vertical line in the right side of page to indicate a limit for total characters in a line.
"set colorcolumn=110
"highlight ColorColumn ctermbg=darkgray
"Auto-completion
"let g:ycm_global_ycm_extra_conf = '~/Users/admin/.config/nvim/plugged/YouCompleteMe/.ycm_extra_conf.py'
"to improve source code navigation, add something like this to your nvim configuration:
"au FileType c,cpp nnoremap <buffer> <c-]> :YcmCompleter GoTo<CR>
"let g:ycm_server_keep_logfiles = 1
"let g:ycm_server_log_level = 'debug'
Thanks in advance!

Answer 1

There's something called in vim after-directory which is helpful for this situation where you put .vim files and pass the path to :runtimepath command.
I'm using neovim so after-directory in my workflow in a macOS system is like below:
~/.config/nvim/after/plugin/commands.vim
so I command! FZF FloatermNew fzf in that file and then give file path to the :runtimepath so this file will be sourced after all other :scriptnames files sourced.