Sensible vimrc for ssh machines

.vimrc

" --- General Settings ---
set nocompatible            " Disable Vi compatibility to enable powerful Vim features
set encoding=utf-8          " Force UTF-8 encoding
filetype plugin indent on   " Enable filetype detection, plugins, and indentation rules
syntax on                   " Enable syntax highlighting

" --- UI & Visuals ---
set number                  " Show line numbers
set ruler                   " Show cursor position (row, col) in status line
set showcmd                 " Show partial commands in the bottom right
set wildmenu                " Enable visual autocomplete menu for command mode
set laststatus=2            " Always show the status line
set cursorline              " Highlight the current line (improves visibility)
set scrolloff=5             " Keep 5 lines of context above/below cursor when scrolling
set t_Co=256                " specific to SSH: force 256 colors if terminal supports it

" --- Colors ---
try
    colorscheme desert      " 'desert' is a standard scheme available on almost all systems
catch
endtry

" --- Indentation (Standard 4-space) ---
set tabstop=4               " Width of a hard tab character
set shiftwidth=4            " Size of an indent
set softtabstop=4           " Number of spaces a tab counts for when editing
set expandtab               " Convert tabs to spaces (safer for consistent rendering)
set autoindent              " Copy indent from current line when starting a new one
set smartindent             " Smarter indentation for C-like languages

" --- Search ---
set incsearch               " Search as you type (incremental)
set hlsearch                " Highlight all search matches
set ignorecase              " Ignore case when searching...
set smartcase               " ...unless you type a capital letter

" --- Behavior ---
set backspace=indent,eol,start  " Make backspace work as expected over autoindent, line breaks, and start of insert
set history=1000                " increase command history limit
set autoread                    " Automatically reload files changed outside Vim
set nobackup                    " Prevent creation of backup files (~) to reduce clutter
set noswapfile                  " Prevent creation of swap files (.swp) - optional, use with care

" --- Key Mappings ---
let mapleader = ","             " Set Leader key to comma

" Press <Leader> + Enter to clear search highlighting
nnoremap <leader><CR> :nohlsearch<CR>

" Quick save with <Leader>w
nnoremap <leader>w :w<CR>

" --- Dumb Auto-Pairs ---

" 1. Auto-close brackets and quotes
inoremap ( ()<Left>
inoremap [ []<Left>
inoremap { {}<Left>
" inoremap " ""<Left>
" inoremap ' ''<Left>

" 2. Smart handling for Enter inside braces (optional but very useful)
" When you type {<Enter>, it expands to:
" {
"   |
" }
inoremap {<CR> {<CR>}<Esc>ko

" 3. Allow typing over the closing bracket (Semi-Smart)
" This prevents getting "())" if you manually type the closing bracket.
" It checks if the next character is the closing bracket; if so, it just moves right.
inoremap <expr> ) strpart(getline('.'), col('.')-1, 1) == ")" ? "\<Right>" : ")"
inoremap <expr> ] strpart(getline('.'), col('.')-1, 1) == "]" ? "\<Right>" : "]"
inoremap <expr> } strpart(getline('.'), col('.')-1, 1) == "}" ? "\<Right>" : "}"


" --- Window Navigation ---
" 1. Move between splits using Ctrl + h, j, k, l (bypassing Ctrl+w)
nnoremap <C-h> <C-w>h
nnoremap <C-j> <C-w>j
nnoremap <C-k> <C-w>k
nnoremap <C-l> <C-w>l

" 2. Seamless Vim & Tmux Navigation
function! TmuxMove(direction, tmux_flag)
    let l:old_win = winnr()
    execute 'wincmd ' . a:direction
    " If window didn't change and we are in a tmux session, switch tmux pane
    if l:old_win == winnr() && !empty($TMUX)
        call system('tmux select-pane -' . a:tmux_flag)
    endif
endfunction

nnoremap <silent> <C-h> :call TmuxMove('h', 'L')<CR>
nnoremap <silent> <C-j> :call TmuxMove('j', 'D')<CR>
nnoremap <silent> <C-k> :call TmuxMove('k', 'U')<CR>
nnoremap <silent> <C-l> :call TmuxMove('l', 'R')<CR>