init.vim

set number
syntax on
set autoindent
set smartindent
set mouse=a
set background=dark

set noswapfile
set noundofile
set nobackup

nnoremap <silent> > :call Indent()<CR>
nnoremap <silent> < :call UnIndent()<CR>

let g:indent = 2
let g:tabchar = " "

colorscheme hybrid

augroup mygroup
  autocmd!
  autocmd BufWritePre * call DeleteBlanklineIndent()
augroup END

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"  setup / factory functions                                                             "
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let &shiftwidth=g:indent
let &softtabstop=g:indent
let &tabstop=g:indent

if g:tabchar == " "
  set expandtab
endif

function! GenIndent()
  call assert_equal(strlen(g:tabchar), 1)
  let res = ""
  let i = 0
  while i < g:indent
    let res = res . g:tabchar
    let i = i + 1
  endwhile
  return res
endfunction

function! Indent()
  let indent_str = GenIndent()
  let cur_line_no = line(".")
  let cur_line = getline(cur_line_no)
  call setline(cur_line_no, indent_str . cur_line)
endfunction

function! UnIndent()
  let cur_line_no = line(".")
  let cur_line = getline(cur_line_no)
let start_str = cur_line[0:(g:indent - 1)]
  let i = 0
  while i < g:indent
    if start_str[0] =~ '\s'
      let start_str = start_str[1:]
    endif
    let i = i + 1
  endwhile
call setline(cur_line_no, start_str . cur_line[(g:indent):])
endfunction

function! DeleteBlanklineIndent()
  let lastlineno = line("$")
  let i = 0
  while i < lastlineno
    let i = i + 1
    if getline(i) =~ "^\\s\\+$"
      call setline(i, "")
    endif
  endwhile
endfunction