Updated vimrc to also work before plugins are installed.

vim/vim/autoload/.gitignore

@@ -0,0 +1 @@
+plug.vim

vim/vimrc

@@ -29,6 +29,13 @@ if has("autocmd")
 	filetype plugin indent on
 endif
 
+" Use plugin manager if available
+if (filereadable($HOME."/.vim/autoload/plug.vim")) || (filereadable("/usr/share/vim/vimfiles/autoload/plug.vim"))
+	let g:use_pluggin_manager = 1
+else
+	let g:use_pluggin_manager = 0
+endif
+
 
 
 "~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
@@ -165,15 +172,24 @@ function! LazyLoadingYMC()
 		call plug#load('YouCompleteMe') | call youcompleteme#Enable()
 	endif
 endfunction
-autocmd BufRead * call timer_start(1, {id->execute('call LazyLoadingYMC()')} )
-" (also try BufWinEnter, InsertEnter, or CursorHold and CursorHoldI events)
+if g:use_pluggin_manager == 1
+	autocmd BufRead * call timer_start(1, {id->execute('call LazyLoadingYMC()')} )
+	" (also try BufWinEnter, InsertEnter, or CursorHold and CursorHoldI events)
+endif
 
 
 " Enable vimtex completions for YCM
-if !exists('g:ycm_semantic_triggers')
-	let g:ycm_semantic_triggers = {}
+function! VimtexYCMSetup()
+	if !exists('g:ycm_semantic_triggers')
+		let g:ycm_semantic_triggers = {}
+	endif
+	if exists('g:vimtex#re#youcompleteme')
+		let g:ycm_semantic_triggers.tex=g:vimtex#re#youcompleteme
+	endif
+endfunction
+if has("autocmd")
+	autocmd VimEnter * call VimtexYCMSetup()
 endif
-autocmd VimEnter * let g:ycm_semantic_triggers.tex=g:vimtex#re#youcompleteme
 
 
 
@@ -184,21 +200,24 @@ autocmd VimEnter * let g:ycm_semantic_triggers.tex=g:vimtex#re#youcompleteme
 
 " Use with :PlugInstall and :PlugUpdate
 
-" Set custom plugin directory
-call plug#begin('~/.vim/vim-plug')
-
-Plug 'ycm-core/YouCompleteMe', { 'do': function('BuildYCM'), 'on': [] }
-Plug 'scrooloose/nerdtree', { 'on': 'NERDTreeToggle' }
-Plug 'dense-analysis/ale'
-Plug 'airblade/vim-gitgutter'
-Plug 'godlygeek/tabular'
-Plug 'tpope/vim-surround'
-Plug 'tpope/vim-unimpaired'
-Plug 'tpope/vim-speeddating'
-Plug 'tpope/vim-repeat'
-Plug 'lervag/vimtex'
-
-call plug#end()
+"if exists('g:use_pluggin_manager') && g:use_pluggin_manager
+if g:use_pluggin_manager == 1
+	" Set custom plugin directory
+	call plug#begin('~/.vim/vim-plug')
+
+	Plug 'ycm-core/YouCompleteMe', { 'do': function('BuildYCM'), 'on': [] }
+	Plug 'scrooloose/nerdtree', { 'on': 'NERDTreeToggle' }
+	Plug 'dense-analysis/ale'
+	Plug 'airblade/vim-gitgutter'
+	Plug 'godlygeek/tabular'
+	Plug 'tpope/vim-surround'
+	Plug 'tpope/vim-unimpaired'
+	Plug 'tpope/vim-speeddating'
+	Plug 'tpope/vim-repeat'
+	Plug 'lervag/vimtex'
+
+	call plug#end()
+endif