Update plug.vim

autoload/plug.vim

@@ -96,7 +96,7 @@ let s:plug_src = 'https://github.com/junegunn/vim-plug.git'
 let s:plug_tab = get(s:, 'plug_tab', -1)
 let s:plug_buf = get(s:, 'plug_buf', -1)
 let s:mac_gui = has('gui_macvim') && has('gui_running')
-let s:is_win = has('win32') || has('win64')
+let s:is_win = has('win32')
 let s:nvim = has('nvim-0.2') || (has('nvim') && exists('*jobwait') && !s:is_win)
 let s:vim8 = has('patch-8.0.0039') && exists('*job_start')
 let s:me = resolve(expand('<sfile>:p'))
@@ -193,6 +193,14 @@ function! s:ask_no_interrupt(...)
   endtry
 endfunction
 
+function! s:lazy(plug, opt)
+  return has_key(a:plug, a:opt) &&
+        \ (empty(s:to_a(a:plug[a:opt]))         ||
+        \  !isdirectory(a:plug.dir)             ||
+        \  len(s:glob(s:rtp(a:plug), 'plugin')) ||
+        \  len(s:glob(s:rtp(a:plug), 'after/plugin')))
+endfunction
+
 function! plug#end()
   if !exists('g:plugs')
     return s:err('Call plug#begin() first')
@@ -214,7 +222,7 @@ function! plug#end()
       continue
     endif
     let plug = g:plugs[name]
-    if get(s:loaded, name, 0) || !has_key(plug, 'on') && !has_key(plug, 'for')
+    if get(s:loaded, name, 0) || !s:lazy(plug, 'on') && !s:lazy(plug, 'for')
       let s:loaded[name] = 1
       continue
     endif
@@ -763,6 +771,9 @@ function! s:prepare(...)
     execute 'silent! unmap <buffer>' k
   endfor
   setlocal buftype=nofile bufhidden=wipe nobuflisted nolist noswapfile nowrap cursorline modifiable nospell
+  if exists('+colorcolumn')
+    setlocal colorcolumn=
+  endif
   setf vim-plug
   if exists('g:syntax_on')
     call s:syntax()
@@ -1008,6 +1019,8 @@ function! s:update_impl(pull, force, args) abort
     let s:clone_opt .= ' -c core.eol=lf -c core.autocrlf=input'
   endif
 
+  let s:submodule_opt = s:git_version_requirement(2, 8) ? ' --jobs='.threads : ''
+
   " Python version requirement (>= 2.7)
   if python && !has('python3') && !ruby && !use_job && s:update.threads > 1
     redir => pyv
@@ -1099,7 +1112,7 @@ function! s:update_finish()
       if !v:shell_error && filereadable(spec.dir.'/.gitmodules') &&
             \ (s:update.force || has_key(s:update.new, name) || s:is_updated(spec.dir))
         call s:log4(name, 'Updating submodules. This may take a while.')
-        let out .= s:bang('git submodule update --init --recursive 2>&1', spec.dir)
+        let out .= s:bang('git submodule update --init --recursive'.s:submodule_opt.' 2>&1', spec.dir)
       endif
       let msg = s:format_message(v:shell_error ? 'x': '-', name, out)
       if v:shell_error
@@ -1318,7 +1331,7 @@ while 1 " Without TCO, Vim stack is bound to explode
 
   let name = keys(s:update.todo)[0]
   let spec = remove(s:update.todo, name)
-  let new  = !isdirectory(spec.dir)
+  let new  = empty(globpath(spec.dir, '.git', 1))
 
   call s:log(new ? '+' : '*', name, pull ? 'Updating ...' : 'Installing ...')
   redraw
@@ -2211,7 +2224,7 @@ function! s:upgrade()
   let new = tmp . '/plug.vim'
 
   try
-    let out = s:system(printf('git clone --depth 1 %s %s', s:plug_src, tmp))
+    let out = s:system(printf('git clone --depth 1 %s %s', s:shellesc(s:plug_src), s:shellesc(tmp)))
     if v:shell_error
       return s:err('Error upgrading vim-plug: '. out)
     endif
@@ -2407,7 +2420,11 @@ function! s:diff()
     call s:append_ul(2, origin ? 'Pending updates:' : 'Last update:')
     for [k, v] in plugs
       let range = origin ? '..origin/'.v.branch : 'HEAD@{1}..'
-      let diff = s:system_chomp('git log --graph --color=never '.join(map(['--pretty=format:%x01%h%x01%d%x01%s%x01%cr', range], 's:shellesc(v:val)')), v.dir)
+      let cmd = 'git log --graph --color=never '.join(map(['--pretty=format:%x01%h%x01%d%x01%s%x01%cr', range], 's:shellesc(v:val)'))
+      if has_key(v, 'rtp')
+        let cmd .= ' -- '.s:shellesc(v.rtp)
+      endif
+      let diff = s:system_chomp(cmd, v.dir)
       if !empty(diff)
         let ref = has_key(v, 'tag') ? (' (tag: '.v.tag.')') : has_key(v, 'commit') ? (' '.v.commit) : ''
         call append(5, extend(['', '- '.k.':'.ref], map(s:lines(diff), 's:format_git_log(v:val)')))
@@ -2426,8 +2443,13 @@ function! s:diff()
         \ . (cnts[1] ? printf(' %d plugin(s) have pending updates.', cnts[1]) : ''))
 
   if cnts[0] || cnts[1]
-    nnoremap <silent> <buffer> <cr> :silent! call <SID>preview_commit()<cr>
+    nnoremap <silent> <buffer> <plug>(plug-preview) :silent! call <SID>preview_commit()<cr>
-    nnoremap <silent> <buffer> o    :silent! call <SID>preview_commit()<cr>
+    if empty(maparg("\<cr>", 'n'))
+      nmap <buffer> <cr> <plug>(plug-preview)
+    endif
+    if empty(maparg('o', 'n'))
+      nmap <buffer> o <plug>(plug-preview)
+    endif
   endif
   if cnts[0]
     nnoremap <silent> <buffer> X :call <SID>revert()<cr>