add vim config

dotfiles/vim/vimrc

@@ -0,0 +1,84 @@
+" Comments in Vimscript start with a `"`.
+
+" If you open this file in Vim, it'll be syntax highlighted for you.
+
+" Vim is based on Vi. Setting `nocompatible` switches from the default
+" Vi-compatibility mode and enables useful Vim functionality. This
+" configuration option turns out not to be necessary for the file named
+" '~/.vimrc', because Vim automatically enters nocompatible mode if that file
+" is present. But we're including it here just in case this config file is
+" loaded some other way (e.g. saved as `foo`, and then Vim started with
+" `vim -u foo`).
+set nocompatible
+
+" Allow plugins based on file types
+filetype plugin on
+
+" Turn on syntax highlighting.
+syntax on
+
+" Disable the default Vim startup message.
+set shortmess+=I
+
+" Show line numbers.
+set number
+
+" This enables relative line numbering mode. With both number and
+" relativenumber enabled, the current line shows the true line number, while
+" all other lines (above and below) are numbered relative to the current line.
+" This is useful because you can tell, at a glance, what count is needed to
+" jump up or down to a particular line, by {count}k to go up or {count}j to go
+" down.
+set relativenumber
+
+" Always show the status line at the bottom, even if you only have one window open.
+set laststatus=2
+
+" The backspace key has slightly unintuitive behavior by default. For example,
+" by default, you can't backspace before the insertion point set with 'i'.
+" This configuration makes backspace behave more reasonably, in that you can
+" backspace over anything.
+set backspace=indent,eol,start
+
+" By default, Vim doesn't let you hide a buffer (i.e. have a buffer that isn't
+" shown in any window) that has unsaved changes. This is to prevent you from "
+" forgetting about unsaved changes and then quitting e.g. via `:qa!`. We find
+" hidden buffers helpful enough to disable this protection. See `:help hidden`
+" for more information on this.
+set hidden
+
+" This setting makes search case-insensitive when all characters in the string
+" being searched are lowercase. However, the search becomes case-sensitive if
+" it contains any capital letters. This makes searching more convenient.
+set ignorecase
+set smartcase
+
+" Enable searching as you type, rather than waiting till you press enter.
+set incsearch
+
+" Unbind some useless/annoying default key bindings.
+nmap Q <Nop> " 'Q' in normal mode enters Ex mode. You almost never want this.
+
+" Disable audible bell because it's annoying.
+set noerrorbells visualbell t_vb=
+
+" Enable mouse support. You should avoid relying on this too much, but it can
+" sometimes be convenient.
+set mouse+=a
+
+" Try to prevent bad habits like using the arrow keys for movement. This is
+" not the only possible bad habit. For example, holding down the h/j/k/l keys
+" for movement, rather than using more efficient movement commands, is also a
+" bad habit. The former is enforceable through a .vimrc, while we don't know
+" how to prevent the latter.
+" Do this in normal mode...
+nnoremap <Left>  :echoe "Use h"<CR>
+nnoremap <Right> :echoe "Use l"<CR>
+nnoremap <Up>    :echoe "Use k"<CR>
+nnoremap <Down>  :echoe "Use j"<CR>
+" ...and in insert mode
+inoremap <Left>  <ESC>:echoe "Use h"<CR>
+inoremap <Right> <ESC>:echoe "Use l"<CR>
+inoremap <Up>    <ESC>:echoe "Use k"<CR>
+inoremap <Down>  <ESC>:echoe "Use j"<CR>
+