update: system vimrc

roles/os_tweaks/files/vimrc

@@ -1,24 +1,118 @@
+" Jeznet config (Based on Debian)
+" ==============================================================================
+" Source: https://gist.github.com/mrjk/1d146a701b201e77279ea4e7c5d075a5
+" Last update: 2025/07/23
+"
+" This file is heavily inspirated from Debian
+" /usr/share/vim/vim91/defaults.vim . It is a sane global vim
+" config for every users that doesn't have a vimrc.
+"
+" Main vimrc config paths:
+"   debian: /etc/vim/vimrc.local
+"   rhel: /etc/vimrc.local
+"
+" Installation at the end of system vimrc:
+"   " Source a global configuration file if available
+"   if filereadable("/etc/vim/vimrc.local")
+"     source /etc/vim/vimrc.local
+"   endif
+"
+" Debian vim files:
+"   /usr/share/vim/vim90/defaults.vim
+"   /usr/share/vim/vim90/debian.vim
 
-" Base options
-set showcmd             " Show (partial) command in status line.
-set showmatch           " Show matching brackets.
-set incsearch           " Incremental search
+
+" General
+" ---------------------------------------
+
+" Disable vim configs auto-loading
+let g:skip_defaults_vim = 1
+
+set nocompatible        " Enable full vim instead of vi
+set ttimeout            " Enable time out for key codes
+set ttimeoutlen=100     " Wait up to 100ms after Esc for special key
+set scrolloff=5         " Ensure before/after lines after context
 set autowrite           " Automatically save before commands like :next and :make
+set incsearch           " Incremental search
+
+" Edition settings
+set backspace=indent,eol,start   " Allow smart backspace
+set history=200                  " keep 200 lines of command line history
+set nrformats-=octal             " Disable incremnt for octal values
+
+
+" Display
+" ---------------------------------------
+
+" Display options
+set showcmd             " Show (partial) command in status line
+set showmatch           " Show matching brackets
+set wildmenu            " display completion matches in a status line
 set ttymouse=           " Disable mouse tty
 set mouse=              " Disable mouse for good
 
 " Color support
 syntax on
 set background=dark
-set nu
 
-" Enable indentation rules per files
-filetype plugin indent on
+" Set numbering
+set nu                  " Enable line numbering
+set numberwidth=1       " Line numbering min width
 
 " Vim sane tabs
 set tabstop=2
 set shiftwidth=2
 set softtabstop=2
 set expandtab
-set backspace=indent,eol,start " Proper backspace behavior.
+
+
+" Advanced
+" ---------------------------------------
+
+" CTRL-U in insert mode deletes a lot.  Use CTRL-G u to first break undo,
+" so that you can undo CTRL-U after inserting a line break.
+" Revert with ":iunmap <C-U>".
+inoremap <C-U> <C-G>u<C-U>
+
+" Only do this part when Vim was compiled with the +eval feature.
+if 1
+  " Enable indentation rules per files
+  filetype plugin indent on
+endif
+
+
+" Autostart
+" ---------------------------------------
+
+if 1
+  " Put these in an autocmd group, so that you can revert them with:
+  " ":augroup vimStartup | exe 'au!' | augroup END"
+  augroup vimStartup
+    au!
+
+    " When editing a file, always jump to the last known cursor position.
+    " Don't do it when the position is invalid, when inside an event handler
+    " (happens when dropping a file on gvim) and for a commit message (it's
+    " likely a different one than last time).
+    autocmd BufReadPost *
+      \ if line("'\"") >= 1 && line("'\"") <= line("$") && &ft !~# 'commit'
+      \ |   exe "normal! g`\""
+      \ | endif
+
+  augroup END
+endif
+
+
+" Helpers
+" ---------------------------------------
+
+" Convenient command to see the difference between the current buffer and the
+" file it was loaded from, thus the changes you made.
+" Only define it when not defined already.
+" Revert with: ":delcommand DiffOrig".
+if !exists(":DiffOrig")
+  command DiffOrig vert new | set bt=nofile | r ++edit # | 0d_ | diffthis
+      \ | wincmd p | diffthis
+endif
+