Enable syntax only during startup

Related discussion can be found in #83. If the user choose not to use
syntax highlighting, he can disable it by putting `syntax off` after
`plug#end()`. But since `plug#end()` is called by `PlugInstall` or
`PlugUpdate`, it is reenabled on those commands which is not desirable.
This commit fixes the issue by changing `plug#end` to do `syntax enable`
only during Vim startup.

.travis.yml

@@ -1,4 +1,7 @@
-language: vim
+language: ruby
+rvm:
+  - 1.8.7
+  - 2.0.0
 
 before_script: |
   hg clone https://code.google.com/p/vim/

README.md

@@ -1,34 +1,32 @@
-![vim-plug](https://raw.github.com/junegunn/vim-plug/master/plug.png)
+![vim-plug](https://raw.githubusercontent.com/junegunn/vim-plug/master/plug.png)
-![travis-ci](https://travis-ci.org/junegunn/vim-plug.svg?branch=master)
+[![travis-ci](https://travis-ci.org/junegunn/vim-plug.svg?branch=master)](https://travis-ci.org/junegunn/vim-plug)
 
-A single-file Vim plugin manager.
+A minimalist Vim plugin manager.
 
-Somewhere between [Pathogen](https://github.com/tpope/vim-pathogen) and
+![](https://raw.githubusercontent.com/junegunn/i/master/vim-plug/installer.gif)
-[Vundle](https://github.com/gmarik/vundle), but with faster parallel installer.
-
-![](https://raw.github.com/junegunn/i/master/vim-plug/installer.gif)
 
 ### Pros.
 
-- Easier to setup
+- Easier to setup: Single file. No boilerplate code required.
-- Parallel installation/update (requires
+- Easier to use: Concise, intuitive syntax
-  [+ruby](http://junegunn.kr/2013/09/installing-vim-with-ruby-support/))
+- [Super-fast](https://raw.githubusercontent.com/junegunn/i/master/vim-plug/40-in-4.gif)
-- Smallest possible feature set
+  parallel installation/update (requires
-- Branch/tag support
+  [+ruby](https://github.com/junegunn/vim-plug/wiki/ruby))
-- On-demand loading
+- On-demand loading to achieve
-
+  [fast startup time](http://junegunn.kr/images/vim-startup-time.png)
-### Cons.
+- Post-update hooks
-
+- Can choose a specific branch or tag for each plugin
-- Everything else
+- Support for externally managed plugins
 
 ### Usage
 
-[Download plug.vim](https://raw.github.com/junegunn/vim-plug/master/plug.vim)
+[Download plug.vim](https://raw.githubusercontent.com/junegunn/vim-plug/master/plug.vim)
 and put it in ~/.vim/autoload
 
 ```sh
 mkdir -p ~/.vim/autoload
-curl -fLo ~/.vim/autoload/plug.vim https://raw.github.com/junegunn/vim-plug/master/plug.vim
+curl -fLo ~/.vim/autoload/plug.vim \
+    https://raw.githubusercontent.com/junegunn/vim-plug/master/plug.vim
 ```
 
 Edit your .vimrc
@@ -64,13 +62,13 @@ Reload .vimrc and `:PlugInstall` to install plugins.
 ### Commands
 
 | Command                             | Description                                                        |
-| --------------------------------- | ------------------------------------------------------------------ |
+| ----------------------------------- | ------------------------------------------------------------------ |
-| PlugInstall [name ...] [#threads] | Install plugins                                                    |
+| `PlugInstall [name ...] [#threads]` | Install plugins                                                    |
-| PlugUpdate [name ...] [#threads]  | Install or update plugins                                          |
+| `PlugUpdate [name ...] [#threads]`  | Install or update plugins                                          |
-| PlugClean[!]                      | Remove unused directories (bang version will clean without prompt) |
+| `PlugClean[!]`                      | Remove unused directories (bang version will clean without prompt) |
-| PlugUpgrade                       | Upgrade vim-plug itself                                            |
+| `PlugUpgrade`                       | Upgrade vim-plug itself                                            |
-| PlugStatus                        | Check the status of plugins                                        |
+| `PlugStatus`                        | Check the status of plugins                                        |
-| PlugDiff                          | See the updated changes from the previous PlugUpdate               |
+| `PlugDiff`                          | See the updated changes from the previous PlugUpdate               |
 
 ### `Plug` options
 
@@ -84,20 +82,27 @@ Reload .vimrc and `:PlugInstall` to install plugins.
 | `for`          | On-demand loading: File types                                        |
 | `frozen`       | Do not install/update plugin unless explicitly given as the argument |
 
-### Options for parallel installer
+### Global options
 
 | Flag                | Default                           | Description                          |
-| ---------------- | ------- | ------------------------------------ |
+| ------------------- | --------------------------------- | ------------------------------------ |
 | `g:plug_threads`    | 16                                | Default number of threads to use     |
 | `g:plug_timeout`    | 60                                | Time limit of each task in seconds   |
 | `g:plug_retries`    | 2                                 | Number of retries in case of timeout |
+| `g:plug_window`     | `vertical topleft new`            | Command to open plug window          |
+| `g:plug_url_format` | `https://git::@github.com/%s.git` | `printf` format to build repo URL    |
 
 ### Keybindings
 
 - `D` - `PlugDiff`
 - `S` - `PlugStatus`
 - `R` - Retry failed update or installation tasks
+- `U` - Update plugins in the selected range
 - `q` - Close the window
+- `:PlugStatus`
+    - `L` - Load plugin
+- `:PlugDiff`
+    - `X` - Revert the update
 
 ### Example: A small [sensible](https://github.com/tpope/vim-sensible) Vim configuration
 
@@ -119,11 +124,18 @@ Plug 'junegunn/vim-github-dashboard', { 'on': ['GHDashboard', 'GHActivity'] }
 " Loaded when clojure file is opened
 Plug 'tpope/vim-fireplace', { 'for': 'clojure' }
 
+" Multiple file types
+Plug 'kovisoft/paredit', { 'for': ['clojure', 'scheme'] }
+
 " On-demand loading on both conditions
 Plug 'junegunn/vader.vim',  { 'on': 'Vader', 'for': 'vader' }
 ```
 
-### Post-installation/update hooks
+`for` option is generally not needed as most plugins for specific file types
+usually don't have too much code in `plugin` directory. You might want to
+examine the output of `vim --startuptime` before applying the option.
+
+### Post-update hooks
 
 There are some plugins that require extra steps after installation or update.
 In that case, use `do` option to describe the task to be performed.
@@ -137,10 +149,11 @@ takes a single argument.
 
 ```vim
 function! BuildYCM(info)
-  " info is a dictionary with two fields
+  " info is a dictionary with 3 fields
   " - name:   name of the plugin
-  " - status: 'installed' or 'updated'
+  " - status: 'installed', 'updated', or 'unchanged'
-  if a:info.status == 'installed'
+  " - force:  set on PlugInstall! or PlugUpdate!
+  if a:info.status == 'installed' || a:info.force
     !./install.sh
   endif
 endfunction
@@ -148,10 +161,14 @@ endfunction
 Plug 'Valloric/YouCompleteMe', { 'do': function('BuildYCM') }
 ```
 
-Both forms of post-update hook are executed inside the directory of the plugin.
+Both forms of post-update hook are executed inside the directory of the plugin
+and only run when the repository has changed, but you can force it to run
+unconditionally with the bang-versions of the commands: `PlugInstall!` and
+`PlugUpdate!`.
 
-Make sure to escape BARs when you write `do` option inline as they are
+Make sure to escape BARs and double-quotes when you write `do` option inline
-mistakenly recognized as command separator for Plug command.
+as they are mistakenly recognized as command separator or the start of the
+trailing comment.
 
 ```vim
 Plug 'junegunn/fzf', { 'do': 'yes \| ./install' }
@@ -165,75 +182,16 @@ let g:fzf_install = 'yes | ./install'
 Plug 'junegunn/fzf', { 'do': g:fzf_install }
 ```
 
+### FAQ/Troubleshooting
+
+See [FAQ/Troubleshooting](https://github.com/junegunn/vim-plug/wiki/faq).
+
 ### Articles
 
 - [Writing my own Vim plugin manager](http://junegunn.kr/2013/09/writing-my-own-vim-plugin-manager)
-- [Thoughts on Vim plugin dependency](http://junegunn.kr/2013/09/thoughts-on-vim-plugin-dependency)
-    - *Support for Plugfile has been removed since 0.5.0*
 - [Vim plugins and startup time](http://junegunn.kr/2014/07/vim-plugins-and-startup-time)
-
+- ~~[Thoughts on Vim plugin dependency](http://junegunn.kr/2013/09/thoughts-on-vim-plugin-dependency)~~
-### FAQ/Troubleshooting
+    - *Support for Plugfile has been removed since 0.5.0*
-
-#### Plugins are not installed/updated in parallel
-
-Your Vim does not support Ruby interface. `:echo has('ruby')` should print 1.
-In order to setup Vim with Ruby support, you may refer to [this
-article](http://junegunn.kr/2013/09/installing-vim-with-ruby-support).
-
-#### *Vim: Caught deadly signal SEGV*
-
-If your Vim crashes with the above message, first check if its Ruby interface is
-working correctly with the following command:
-
-```vim
-:ruby puts RUBY_VERSION
-```
-
-If Vim crashes even with this command, it is likely that Ruby interface is
-broken, and you have to rebuild Vim with a working version of Ruby.
-(`brew remove vim && brew install vim` or `./configure && make ...`)
-
-If you're on OS X, one possibility is that you had installed Vim with
-[Homebrew](http://brew.sh/) while using a Ruby installed with
-[RVM](http://rvm.io/) or [rbenv](https://github.com/sstephenson/rbenv) and later
-removed that version of Ruby.
-
-[Please let me know](https://github.com/junegunn/vim-plug/issues) if you can't
-resolve the problem. In the meantime, you can set `g:plug_threads` to 1, so that
-Ruby installer is not used at all.
-
-#### Errors on fish shell
-
-If vim-plug doesn't work correctly on fish shell, you might need to add `set
-shell=/bin/sh` to your .vimrc.
-
-Refer to the following links for the details:
-- http://badsimplicity.com/vim-fish-e484-cant-open-file-tmpvrdnvqe0-error/
-- https://github.com/junegunn/vim-plug/issues/12
-
-#### Freezing plugin version with commit hash
-
-vim-plug does not allow you to freeze the version of a plugin with its commit
-hash. This is by design. I don't believe a user of a plugin should be looking
-at its individual commits. Instead, one should be choosing the right version
-using release tags or versioned branches (e.g. 1.2.3, stable, devel, etc.)
-
-```vim
-Plug 'junegunn/vim-easy-align', '2.9.2'
-```
-
-If the repository doesn't come with such tags or branches, you should think of
-it as "unstable" or "in development", and always use its latest revision.
-
-If you really must choose a certain untagged revision, consider forking the
-repository.
-
-#### Migrating from other plugin managers
-
-vim-plug does not require any extra statement other than `plug#begin()` and
-`plug#end()`. You can remove `filetype off`, `filetype plugin indent on` and
-`syntax on` from your .vimrc as they are automatically handled by
-`plug#end()`.
 
 ### License
 

plug.vim

@@ -5,7 +5,7 @@
 "
 "   mkdir -p ~/.vim/autoload
 "   curl -fLo ~/.vim/autoload/plug.vim \
-"     https://raw.github.com/junegunn/vim-plug/master/plug.vim
+"     https://raw.githubusercontent.com/junegunn/vim-plug/master/plug.vim
 "
 " Edit your .vimrc
 "
@@ -68,22 +68,23 @@ let g:loaded_plug = 1
 let s:cpo_save = &cpo
 set cpo&vim
 
-let s:plug_source = 'https://raw.github.com/junegunn/vim-plug/master/plug.vim'
+let s:plug_source = 'https://raw.githubusercontent.com/junegunn/vim-plug/master/plug.vim'
-let s:plug_buf = -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:me = expand('<sfile>:p')
+let s:me = resolve(expand('<sfile>:p'))
-let s:base_spec = { 'branch': 'master', 'frozen': 0, 'local': 0 }
+let s:base_spec = { 'branch': 'master', 'frozen': 0 }
 let s:TYPE = {
 \   'string':  type(''),
 \   'list':    type([]),
 \   'dict':    type({}),
 \   'funcref': type(function('call'))
 \ }
+let s:loaded = get(s:, 'loaded', {})
 
 function! plug#begin(...)
   if a:0 > 0
-    let home = s:path(fnamemodify(a:1, ':p'))
+    let home = s:path(fnamemodify(expand(a:1), ':p'))
   elseif exists('g:plug_home')
     let home = s:path(g:plug_home)
   elseif !empty(&rtp)
@@ -92,37 +93,40 @@ function! plug#begin(...)
     return s:err('Unable to determine plug home. Try calling plug#begin() with a path argument.')
   endif
 
-  if !isdirectory(home)
-    try
-      call mkdir(home, 'p')
-    catch
-      return s:err('Invalid plug directory: '. home)
-    endtry
-  endif
-  if !executable('git')
-    return s:err('`git` executable not found. vim-plug requires git.')
-  endif
-
   let g:plug_home = home
   let g:plugs = {}
   " we want to keep track of the order plugins where registered.
   let g:plugs_order = []
 
-  command! -nargs=+ -bar Plug   call s:add(<args>)
+  call s:define_commands()
-  command! -nargs=* -complete=customlist,s:names PlugInstall call s:install(<f-args>)
-  command! -nargs=* -complete=customlist,s:names PlugUpdate  call s:update(<f-args>)
-  command! -nargs=0 -bang PlugClean call s:clean('<bang>' == '!')
-  command! -nargs=0 PlugUpgrade if s:upgrade() | call s:upgrade_specs() | execute 'source '. s:me | endif
-  command! -nargs=0 PlugStatus  call s:status()
-  command! -nargs=0 PlugDiff    call s:diff()
-
   return 1
 endfunction
 
+function! s:define_commands()
+  command! -nargs=+ -bar Plug call s:add(<args>)
+  if !executable('git')
+    return s:err('`git` executable not found. vim-plug requires git.')
+  endif
+  command! -nargs=* -bar -bang -complete=customlist,s:names PlugInstall call s:install('<bang>' == '!', [<f-args>])
+  command! -nargs=* -bar -bang -complete=customlist,s:names PlugUpdate  call s:update('<bang>' == '!', [<f-args>])
+  command! -nargs=0 -bar -bang PlugClean call s:clean('<bang>' == '!')
+  command! -nargs=0 -bar PlugUpgrade if s:upgrade() | execute 'source' s:me | endif
+  command! -nargs=0 -bar PlugStatus  call s:status()
+  command! -nargs=0 -bar PlugDiff    call s:diff()
+endfunction
+
 function! s:to_a(v)
   return type(a:v) == s:TYPE.list ? a:v : [a:v]
 endfunction
 
+function! s:source(from, ...)
+  for pattern in a:000
+    for vim in split(globpath(a:from, pattern), '\n')
+      execute 'source' vim
+    endfor
+  endfor
+endfunction
+
 function! plug#end()
   if !exists('g:plugs')
     return s:err('Call plug#begin() first')
@@ -137,20 +141,15 @@ function! plug#end()
   let lod = {}
 
   filetype off
-  " we want to make sure the plugin directories are added to rtp in the same
+  for name in g:plugs_order
-  " order that they are registered with the Plug command. since the s:add_rtp
-  " function uses ^= to add plugin directories to the front of the rtp, we
-  " need to loop through the plugins in reverse
-  for name in reverse(copy(g:plugs_order))
     let plug = g:plugs[name]
-    if !has_key(plug, 'on') && !has_key(plug, 'for')
+    if get(s:loaded, name, 0) || !has_key(plug, 'on') && !has_key(plug, 'for')
-      call s:add_rtp(s:rtp(plug))
+      let s:loaded[name] = 1
       continue
     endif
 
     if has_key(plug, 'on')
-      let commands = s:to_a(plug.on)
+      for cmd in s:to_a(plug.on)
-      for cmd in commands
         if cmd =~ '^<Plug>.\+'
           if empty(mapcheck(cmd)) && empty(mapcheck(cmd, 'i'))
             for [mode, map_prefix, key_prefix] in
@@ -169,10 +168,11 @@ function! plug#end()
     endif
 
     if has_key(plug, 'for')
-      for vim in split(globpath(s:rtp(plug), 'ftdetect/**/*.vim'), '\n')
+      let types = s:to_a(plug.for)
-        execute 'source '.vim
+      if !empty(types)
-      endfor
+        call s:source(s:rtp(plug), 'ftdetect/**/*.vim', 'after/ftdetect/**/*.vim')
-      for key in s:to_a(plug.for)
+      endif
+      for key in types
         if !has_key(lod, key)
           let lod[key] = []
         endif
@@ -184,12 +184,27 @@ function! plug#end()
   for [key, names] in items(lod)
     augroup PlugLOD
       execute printf('autocmd FileType %s call <SID>lod_ft(%s, %s)',
-            \ key, string(key), string(reverse(names)))
+            \ key, string(key), string(names))
     augroup END
   endfor
+
   call s:reorg_rtp()
   filetype plugin indent on
-  syntax on
+  if has('vim_starting')
+    syntax enable
+  else
+    call s:reload()
+  endif
+endfunction
+
+function! s:loaded_names()
+  return filter(copy(g:plugs_order), 'get(s:loaded, v:val, 0)')
+endfunction
+
+function! s:reload()
+  for name in s:loaded_names()
+    call s:source(s:rtp(g:plugs[name]), 'plugin/**/*.vim', 'after/plugin/**/*.vim')
+  endfor
 endfunction
 
 function! s:trim(str)
@@ -238,59 +253,100 @@ function! s:err(msg)
 endfunction
 
 function! s:esc(path)
-  return substitute(a:path, ' ', '\\ ', 'g')
+  return escape(a:path, ' ')
 endfunction
 
-function! s:add_rtp(rtp)
+function! s:escrtp(path)
-  execute 'set rtp^='.s:esc(a:rtp)
+  return escape(a:path, ' ,')
-  let after = globpath(a:rtp, 'after')
+endfunction
+
+function! s:remove_rtp()
+  for name in s:loaded_names()
+    let rtp = s:rtp(g:plugs[name])
+    execute 'set rtp-='.s:escrtp(rtp)
+    let after = globpath(rtp, 'after')
     if isdirectory(after)
-    execute 'set rtp+='.s:esc(after)
+      execute 'set rtp-='.s:escrtp(after)
     endif
+  endfor
 endfunction
 
 function! s:reorg_rtp()
   if !empty(s:first_rtp)
     execute 'set rtp-='.s:first_rtp
-    execute 'set rtp^='.s:first_rtp
-  endif
-  if s:last_rtp !=# s:first_rtp
     execute 'set rtp-='.s:last_rtp
+  endif
+
+  " &rtp is modified from outside
+  if exists('s:prtp') && s:prtp !=# &rtp
+    call s:remove_rtp()
+    unlet! s:middle
+  endif
+
+  let s:middle = get(s:, 'middle', &rtp)
+  let rtps     = map(s:loaded_names(), 's:rtp(g:plugs[v:val])')
+  let afters   = filter(map(copy(rtps), 'globpath(v:val, "after")'), 'isdirectory(v:val)')
+  let &rtp     = join(map(rtps, 's:escrtp(v:val)'), ',')
+                 \ . substitute(','.s:middle.',', '^,,$', ',', '')
+                 \ . join(map(afters, 's:escrtp(v:val)'), ',')
+  let s:prtp   = &rtp
+
+  if !empty(s:first_rtp)
+    execute 'set rtp^='.s:first_rtp
     execute 'set rtp+='.s:last_rtp
   endif
 endfunction
 
-function! s:lod(plug, types)
+function! plug#load(...)
-  let rtp = s:rtp(a:plug)
+  if a:0 == 0
-  call s:add_rtp(rtp)
+    return s:err('Argument missing: plugin name(s) required')
+  endif
+  if !exists('g:plugs')
+    return s:err('plug#begin was not called')
+  endif
+  let unknowns = filter(copy(a:000), '!has_key(g:plugs, v:val)')
+  if !empty(unknowns)
+    let s = len(unknowns) > 1 ? 's' : ''
+    return s:err(printf('Unknown plugin%s: %s', s, join(unknowns, ', ')))
+  end
+  for name in a:000
+    call s:lod([name], ['ftdetect', 'after/ftdetect', 'plugin', 'after/plugin'])
+  endfor
+  silent! doautocmd BufRead
+  return 1
+endfunction
+
+function! s:lod(names, types)
+  for name in a:names
+    let s:loaded[name] = 1
+  endfor
+  call s:reorg_rtp()
+
+  for name in a:names
+    let rtp = s:rtp(g:plugs[name])
     for dir in a:types
-    for vim in split(globpath(rtp, dir.'/**/*.vim'), '\n')
+      call s:source(rtp, dir.'/**/*.vim')
-      execute 'source '.vim
     endfor
   endfor
 endfunction
 
 function! s:lod_ft(pat, names)
-  for name in a:names
+  call s:lod(a:names, ['plugin', 'after/plugin'])
-    call s:lod(g:plugs[name], ['plugin', 'after'])
+  execute 'autocmd! PlugLOD FileType' a:pat
-  endfor
-  call s:reorg_rtp()
-  execute 'autocmd! PlugLOD FileType ' . a:pat
   silent! doautocmd filetypeplugin FileType
+  silent! doautocmd filetypeindent FileType
 endfunction
 
 function! s:lod_cmd(cmd, bang, l1, l2, args, name)
-  execute 'delc '.a:cmd
+  execute 'delc' a:cmd
-  call s:lod(g:plugs[a:name], ['plugin', 'ftdetect', 'after'])
+  call s:lod([a:name], ['ftdetect', 'after/ftdetect', 'plugin', 'after/plugin'])
-  call s:reorg_rtp()
   execute printf('%s%s%s %s', (a:l1 == a:l2 ? '' : (a:l1.','.a:l2)), a:cmd, a:bang, a:args)
 endfunction
 
 function! s:lod_map(map, name, prefix)
-  execute 'unmap '.a:map
+  execute 'unmap' a:map
-  execute 'iunmap '.a:map
+  execute 'iunmap' a:map
-  call s:lod(g:plugs[a:name], ['plugin', 'ftdetect', 'after'])
+  call s:lod([a:name], ['ftdetect', 'after/ftdetect', 'plugin', 'after/plugin'])
-  call s:reorg_rtp()
   let extra = ''
   while 1
     let c = getchar(0)
@@ -311,9 +367,10 @@ function! s:add(repo, ...)
     let repo = s:trim(a:repo)
     let name = fnamemodify(repo, ':t:s?\.git$??')
     let spec = extend(s:infer_properties(name, repo),
-                    \ a:0 == 1 ? s:parse_options(a:1) : copy(s:base_spec))
+                    \ a:0 == 1 ? s:parse_options(a:1) : s:base_spec)
     let g:plugs[name] = spec
     let g:plugs_order += [name]
+    let s:loaded[name] = 0
   catch
     return s:err(v:exception)
   endtry
@@ -341,7 +398,7 @@ endfunction
 function! s:infer_properties(name, repo)
   let repo = a:repo
   if s:is_local_plug(repo)
-    let properties = { 'dir': s:dirpath(expand(repo)), 'local': 1 }
+    return { 'dir': s:dirpath(expand(repo)) }
   else
     if repo =~ ':'
       let uri = repo
@@ -349,32 +406,33 @@ function! s:infer_properties(name, repo)
       if repo !~ '/'
         let repo = 'vim-scripts/'. repo
       endif
-      let uri = 'https://git:@github.com/' . repo . '.git'
+      let fmt = get(g:, 'plug_url_format', 'https://git::@github.com/%s.git')
+      let uri = printf(fmt, repo)
     endif
     let dir = s:dirpath( fnamemodify(join([g:plug_home, a:name], '/'), ':p') )
-    let properties = { 'dir': dir, 'uri': uri }
+    return { 'dir': dir, 'uri': uri }
   endif
-  return properties
 endfunction
 
-function! s:install(...)
+function! s:install(force, names)
-  call s:update_impl(0, a:000)
+  call s:update_impl(0, a:force, a:names)
 endfunction
 
-function! s:update(...)
+function! s:update(force, names)
-  call s:update_impl(1, a:000)
+  call s:update_impl(1, a:force, a:names)
 endfunction
 
-function! s:apply()
+function! plug#helptags()
+  if !exists('g:plugs')
+    return s:err('plug#begin was not called')
+  endif
   for spec in values(g:plugs)
     let docd = join([spec.dir, 'doc'], '/')
     if isdirectory(docd)
-      silent! execute 'helptags '. join([spec.dir, 'doc'], '/')
+      silent! execute 'helptags' s:esc(docd)
     endif
   endfor
-  runtime! plugin/*.vim
+  return 1
-  runtime! after/*.vim
-  silent! source $MYVIMRC
 endfunction
 
 function! s:syntax()
@@ -394,6 +452,7 @@ function! s:syntax()
   syn match plugCommit /^  [0-9a-z]\{7} .*/ contains=plugRelDate,plugSha
   syn match plugSha /\(^  \)\@<=[0-9a-z]\{7}/ contained
   syn match plugRelDate /([^)]*)$/ contained
+  syn match plugNotLoaded /(not loaded)$/
   syn match plugError /^x.*/
   syn keyword Function PlugInstall PlugStatus PlugUpdate PlugClean
   hi def link plug1       Title
@@ -414,6 +473,8 @@ function! s:syntax()
   hi def link plugError   Error
   hi def link plugRelDate Comment
   hi def link plugSha     Identifier
+
+  hi def link plugNotLoaded Comment
 endfunction
 
 function! s:lpad(str, len)
@@ -425,22 +486,29 @@ function! s:lastline(msg)
   return get(lines, -1, '')
 endfunction
 
+function! s:new_window()
+  execute get(g:, 'plug_window', 'vertical topleft new')
+endfunction
+
 function! s:prepare()
   if bufexists(s:plug_buf)
     let winnr = bufwinnr(s:plug_buf)
     if winnr < 0
-      vertical topleft new
+      call s:new_window()
-      execute 'buffer ' . s:plug_buf
+      execute 'buffer' s:plug_buf
     else
       execute winnr . 'wincmd w'
     endif
+    setlocal modifiable
     silent %d _
   else
-    vertical topleft new
+    call s:new_window()
-    nnoremap <silent> <buffer> q  :if b:plug_preview==1<bar>pc<bar>endif<bar>q<cr>
+    nnoremap <silent> <buffer> q  :if b:plug_preview==1<bar>pc<bar>endif<bar>echo<bar>q<cr>
     nnoremap <silent> <buffer> R  :silent! call <SID>retry()<cr>
     nnoremap <silent> <buffer> D  :PlugDiff<cr>
     nnoremap <silent> <buffer> S  :PlugStatus<cr>
+    nnoremap <silent> <buffer> U  :call <SID>status_update()<cr>
+    xnoremap <silent> <buffer> U  :call <SID>status_update()<cr>
     nnoremap <silent> <buffer> ]] :silent! call <SID>section('')<cr>
     nnoremap <silent> <buffer> [[ :silent! call <SID>section('b')<cr>
     let b:plug_preview = -1
@@ -448,7 +516,9 @@ function! s:prepare()
     call s:assign_name()
   endif
   silent! unmap <buffer> <cr>
-  setlocal buftype=nofile bufhidden=wipe nobuflisted noswapfile nowrap cursorline
+  silent! unmap <buffer> L
+  silent! unmap <buffer> X
+  setlocal buftype=nofile bufhidden=wipe nobuflisted noswapfile nowrap cursorline modifiable
   setf vim-plug
   call s:syntax()
 endfunction
@@ -462,18 +532,19 @@ function! s:assign_name()
     let name = printf('%s (%s)', prefix, idx)
     let idx = idx + 1
   endwhile
-  silent! execute 'f '.fnameescape(name)
+  silent! execute 'f' fnameescape(name)
 endfunction
 
-function! s:do(pull, todo)
+function! s:do(pull, force, todo)
   for [name, spec] in items(a:todo)
     if !isdirectory(spec.dir)
       continue
     endif
-    execute 'cd '.s:esc(spec.dir)
+    execute 'cd' s:esc(spec.dir)
     let installed = has_key(s:prev_update.new, name)
-    if installed || (a:pull &&
+    let updated = installed ? 0 :
-      \ !empty(s:system_chomp('git log --pretty=format:"%h" "HEAD...HEAD@{1}"')))
+      \ (a:pull && !empty(s:system_chomp('git log --pretty=format:"%h" "HEAD...HEAD@{1}"')))
+    if a:force || installed || updated
       call append(3, '- Post-update hook for '. name .' ... ')
       let type = type(spec.do)
       if type == s:TYPE.string
@@ -488,7 +559,8 @@ function! s:do(pull, todo)
         endtry
       elseif type == s:TYPE.funcref
         try
-          call spec.do({ 'name': name, 'status': (installed ? 'installed' : 'updated') })
+          let status = installed ? 'installed' : (updated ? 'updated' : 'unchanged')
+          call spec.do({ 'name': name, 'status': status, 'force': a:force })
           let result = 'Done!'
         catch
           let result = 'Error: ' . v:exception
@@ -505,16 +577,18 @@ endfunction
 function! s:finish(pull)
   call append(3, '- Finishing ... ')
   redraw
-  call s:apply()
+  call plug#helptags()
-  call s:syntax()
+  call plug#end()
   call setline(4, getline(4) . 'Done!')
   normal! gg
+  call s:syntax()
   redraw
   let msgs = []
   if !empty(s:prev_update.errors)
     call add(msgs, "Press 'R' to retry.")
   endif
-  if a:pull
+  if a:pull && !empty(filter(getline(5, '$'),
+                \ "v:val =~ '^- ' && stridx(v:val, 'Already up-to-date') < 0"))
     call add(msgs, "Press 'D' to see the updated changes.")
   endif
   echo join(msgs, ' ')
@@ -524,7 +598,7 @@ function! s:retry()
   if empty(s:prev_update.errors)
     return
   endif
-  call s:update_impl(s:prev_update.pull,
+  call s:update_impl(s:prev_update.pull, s:prev_update.force,
         \ extend(copy(s:prev_update.errors), [s:prev_update.threads]))
 endfunction
 
@@ -536,7 +610,7 @@ function! s:names(...)
   return filter(keys(g:plugs), 'stridx(v:val, a:1) == 0 && s:is_managed(v:val)')
 endfunction
 
-function! s:update_impl(pull, args) abort
+function! s:update_impl(pull, force, args) abort
   let st = reltime()
   let args = copy(a:args)
   let threads = (len(args) > 0 && args[-1] =~ '^[1-9][0-9]*$') ?
@@ -553,17 +627,22 @@ function! s:update_impl(pull, args) abort
     return
   endif
 
+  if !isdirectory(g:plug_home)
+    try
+      call mkdir(g:plug_home, 'p')
+    catch
+      return s:err(printf('Invalid plug directory: %s.'
+                        \ 'Try to call plug#begin with a valid directory', g:plug_home))
+    endtry
+  endif
+
   call s:prepare()
   call append(0, a:pull ? 'Updating plugins' : 'Installing plugins')
   call append(1, '['. s:lpad('', len(todo)) .']')
   normal! 2G
   redraw
 
-  if !isdirectory(g:plug_home)
+  let s:prev_update = { 'errors': [], 'pull': a:pull, 'force': a:force, 'new': {}, 'threads': threads }
-    call mkdir(g:plug_home, 'p')
-  endif
-  let len = len(g:plugs)
-  let s:prev_update = { 'errors': [], 'pull': a:pull, 'new': {}, 'threads': threads }
   if has('ruby') && threads > 1
     try
       let imd = &imd
@@ -574,9 +653,9 @@ function! s:update_impl(pull, args) abort
     catch
       let lines = getline(4, '$')
       let printed = {}
-      silent 4,$d
+      silent 4,$d _
       for line in lines
-        let name = get(matchlist(line, '^. \([^:]\+\):'), 1, '')
+        let name = matchstr(line, '^. \zs[^:]\+\ze:')
         if empty(name) || !has_key(printed, name)
           call append('$', line)
           if !empty(name)
@@ -593,10 +672,7 @@ function! s:update_impl(pull, args) abort
   else
     call s:update_serial(a:pull, todo)
   endif
-  call s:do(a:pull, filter(copy(todo), 'has_key(v:val, "do")'))
+  call s:do(a:pull, a:force, filter(copy(todo), 'has_key(v:val, "do")'))
-  if len(g:plugs) > len
-    call plug#end()
-  endif
   call s:finish(a:pull)
   call setline(1, 'Updated. Elapsed time: ' . split(reltimestr(reltime(st)))[0] . ' sec.')
 endfunction
@@ -619,12 +695,12 @@ function! s:update_serial(pull, todo)
   for [name, spec] in items(todo)
     let done[name] = 1
     if isdirectory(spec.dir)
-      execute 'cd '.s:esc(spec.dir)
+      execute 'cd' s:esc(spec.dir)
       let [valid, msg] = s:git_valid(spec, 0, 0)
       if valid
         let result = a:pull ?
           \ s:system(
-          \ printf('git checkout -q %s 2>&1 && git pull origin %s 2>&1 && git submodule update --init --recursive 2>&1',
+          \ printf('git checkout -q %s 2>&1 && git pull --no-rebase origin %s 2>&1 && git submodule update --init --recursive 2>&1',
           \   s:shellesc(spec.branch), s:shellesc(spec.branch))) : 'Already installed'
         let error = a:pull ? v:shell_error != 0 : 0
       else
@@ -674,6 +750,20 @@ function! s:update_parallel(pull, todo, threads)
     %["#{arg.gsub('"', '\"')}"]
   end
 
+  def killall pid
+    pids = [pid]
+    unless `which pgrep 2> /dev/null`.empty?
+      children = pids
+      until children.empty?
+        children = children.map { |pid|
+          `pgrep -P #{pid}`.lines.map { |l| l.chomp }
+        }.flatten
+        pids += children
+      end
+    end
+    pids.each { |pid| Process.kill 'TERM', pid.to_i rescue nil }
+  end
+
   require 'thread'
   require 'fileutils'
   require 'timeout'
@@ -681,7 +771,7 @@ function! s:update_parallel(pull, todo, threads)
   iswin = VIM::evaluate('s:is_win').to_i == 1
   pull  = VIM::evaluate('a:pull').to_i == 1
   base  = VIM::evaluate('g:plug_home')
-  all   = VIM::evaluate('copy(a:todo)')
+  all   = VIM::evaluate('a:todo')
   limit = VIM::evaluate('get(g:, "plug_timeout", 60)')
   tries = VIM::evaluate('get(g:, "plug_retries", 2)') + 1
   nthr  = VIM::evaluate('a:threads').to_i
@@ -728,7 +818,7 @@ function! s:update_parallel(pull, todo, threads)
       logh.call
     end
   }
-  bt = proc { |cmd, name, type|
+  bt = proc { |cmd, name, type, cleanup|
     tried = timeout = 0
     begin
       tried += 1
@@ -756,19 +846,10 @@ function! s:update_parallel(pull, todo, threads)
       [$? == 0, data.chomp]
     rescue Timeout::Error, Interrupt => e
       if fd && !fd.closed?
-        pids = [fd.pid]
+        killall fd.pid
-        unless `which pgrep`.empty?
-          children = pids
-          until children.empty?
-            children = children.map { |pid|
-              `pgrep -P #{pid}`.lines.map { |l| l.chomp }
-            }.flatten
-            pids += children
-          end
-        end
-        pids.each { |pid| Process.kill 'TERM', pid.to_i rescue nil }
         fd.close
       end
+      cleanup.call if cleanup
       if e.is_a?(Timeout::Error) && tried < tries
         3.downto(1) do |countdown|
           s = countdown > 1 ? 's' : ''
@@ -817,7 +898,7 @@ function! s:update_parallel(pull, todo, threads)
           ok, result =
             if exists
               dir = esc dir
-              ret, data = bt.call "#{cd} #{dir} && git rev-parse --abbrev-ref HEAD 2>&1 && git config remote.origin.url", nil, nil
+              ret, data = bt.call "#{cd} #{dir} && git rev-parse --abbrev-ref HEAD 2>&1 && git config remote.origin.url", nil, nil, nil
               current_uri = data.lines.to_a.last
               if !ret
                 if data =~ /^Interrupted|^Timeout/
@@ -825,14 +906,14 @@ function! s:update_parallel(pull, todo, threads)
                 else
                   [false, [data.chomp, "PlugClean required."].join($/)]
                 end
-              elsif current_uri.sub(/git:@/, '') != uri.sub(/git:@/, '')
+              elsif current_uri.sub(/git::?@/, '') != uri.sub(/git::?@/, '')
                 [false, ["Invalid URI: #{current_uri}",
                          "Expected:    #{uri}",
                          "PlugClean required."].join($/)]
               else
                 if pull
                   log.call name, 'Updating ...', :update
-                  bt.call "#{cd} #{dir} && git checkout -q #{branch} 2>&1 && (git pull origin #{branch} #{progress} 2>&1 && #{subm})", name, :update
+                  bt.call "#{cd} #{dir} && git checkout -q #{branch} 2>&1 && (git pull --no-rebase origin #{branch} #{progress} 2>&1 && #{subm})", name, :update, nil
                 else
                   [true, skip]
                 end
@@ -840,7 +921,9 @@ function! s:update_parallel(pull, todo, threads)
             else
               d = esc dir.sub(%r{[\\/]+$}, '')
               log.call name, 'Installing ...', :install
-              bt.call "(git clone #{progress} --recursive #{uri} -b #{branch} #{d} 2>&1 && cd #{esc dir} && #{subm})", name, :install
+              bt.call "(git clone #{progress} --recursive #{uri} -b #{branch} #{d} 2>&1 && cd #{esc dir} && #{subm})", name, :install, proc {
+                FileUtils.rm_rf dir
+              }
             end
           mtx.synchronize { VIM::command("let s:prev_update.new['#{name}'] = 1") } if !exists && ok
           log.call name, result, ok
@@ -868,8 +951,8 @@ function! s:progress_bar(line, bar, total)
 endfunction
 
 function! s:compare_git_uri(a, b)
-  let a = substitute(a:a, 'git:@', '', '')
+  let a = substitute(a:a, 'git:\{1,2}@', '', '')
-  let b = substitute(a:b, 'git:@', '', '')
+  let b = substitute(a:b, 'git:\{1,2}@', '', '')
   return a ==# b
 endfunction
 
@@ -895,7 +978,7 @@ function! s:git_valid(spec, check_branch, cd)
   let ret = 1
   let msg = 'OK'
   if isdirectory(a:spec.dir)
-    if a:cd | execute 'cd ' . s:esc(a:spec.dir) | endif
+    if a:cd | execute 'cd' s:esc(a:spec.dir) | endif
     let result = split(s:system('git rev-parse --abbrev-ref HEAD 2>&1 && git config remote.origin.url'), '\n')
     let remote = result[-1]
     if v:shell_error
@@ -986,49 +1069,45 @@ function! s:clean(force)
 endfunction
 
 function! s:upgrade()
-  if executable('curl')
+  let new = s:me . '.new'
-    let mee = s:shellesc(s:me)
-    let new = s:shellesc(s:me . '.new')
   echo 'Downloading '. s:plug_source
   redraw
-    let mv = s:is_win ? 'move /Y' : 'mv -f'
+  try
-    let cp = s:is_win ? 'copy /Y' : 'cp -f'
+    if executable('curl')
-    call system(printf(
+      let output = system(printf('curl -fLo %s %s', s:shellesc(new), s:plug_source))
-      \ 'curl -fLo %s %s && '.cp.' %s %s.old && '.mv.' %s %s',
+      if v:shell_error
-      \ new, s:plug_source, mee, mee, new, mee))
+        throw get(split(output, '\n'), -1, v:shell_error)
-    if v:shell_error == 0
-      unlet g:loaded_plug
-      echo 'Downloaded '. s:plug_source
-      return 1
-    else
-      return s:err('Error upgrading vim-plug')
       endif
     elseif has('ruby')
-    echo 'Downloading '. s:plug_source
       ruby << EOF
       require 'open-uri'
-      require 'fileutils'
+      File.open(VIM::evaluate('new'), 'w') do |f|
-      me  = VIM::evaluate('s:me')
-      old = me + '.old'
-      new = me + '.new'
-      File.open(new, 'w') do |f|
         f << open(VIM::evaluate('s:plug_source')).read
       end
-      FileUtils.cp me, old
-      File.rename  new, me
 EOF
-    unlet g:loaded_plug
-    echo 'Downloaded '. s:plug_source
-    return 1
     else
       return s:err('curl executable or ruby support not found')
     endif
+  catch
+    return s:err('Error upgrading vim-plug: '. v:exception)
+  endtry
+
+  if readfile(s:me) ==# readfile(new)
+    echo 'vim-plug is up-to-date'
+    silent! call delete(new)
+    return 0
+  else
+    call rename(s:me, s:me . '.old')
+    call rename(new, s:me)
+    unlet g:loaded_plug
+    echo 'vim-plug is upgraded'
+    return 1
+  endif
 endfunction
 
 function! s:upgrade_specs()
   for spec in values(g:plugs)
     let spec.frozen = get(spec, 'frozen', 0)
-    let spec.local  = get(spec, 'local', 0)
   endfor
 endfunction
 
@@ -1038,6 +1117,7 @@ function! s:status()
   call append(1, '')
 
   let ecnt = 0
+  let unloaded = 0
   let [cnt, total] = [0, len(g:plugs)]
   for [name, spec] in items(g:plugs)
     if has_key(spec, 'uri')
@@ -1055,6 +1135,11 @@ function! s:status()
     endif
     let cnt += 1
     let ecnt += !valid
+    " `s:loaded` entry can be missing if PlugUpgraded
+    if valid && get(s:loaded, name, -1) == 0
+      let unloaded = 1
+      let msg .= ' (not loaded)'
+    endif
     call s:progress_bar(2, repeat('=', cnt), total)
     call append(3, s:format_message(valid, name, msg))
     normal! 2G
@@ -1062,6 +1147,36 @@ function! s:status()
   endfor
   call setline(1, 'Finished. '.ecnt.' error(s).')
   normal! gg
+  setlocal nomodifiable
+  if unloaded
+    echo "Press 'L' on each line to load plugin, or 'U' to update"
+    nnoremap <silent> <buffer> L :call <SID>status_load(line('.'))<cr>
+    xnoremap <silent> <buffer> L :call <SID>status_load(line('.'))<cr>
+  end
+endfunction
+
+function! s:extract_name(str, prefix, suffix)
+  return matchstr(a:str, '^'.a:prefix.' \zs[^:]\+\ze:.*'.a:suffix.'$')
+endfunction
+
+function! s:status_load(lnum)
+  let line = getline(a:lnum)
+  let name = s:extract_name(line, '-', '(not loaded)')
+  if !empty(name)
+    call plug#load(name)
+    setlocal modifiable
+    call setline(a:lnum, substitute(line, ' (not loaded)$', '', ''))
+    setlocal nomodifiable
+  endif
+endfunction
+
+function! s:status_update() range
+  let lines = getline(a:firstline, a:lastline)
+  let names = filter(map(lines, 's:extract_name(v:val, "[x-]", "")'), '!empty(v:val)')
+  if !empty(names)
+    echo
+    execute 'PlugUpdate' join(names)
+  endif
 endfunction
 
 function! s:is_preview_window_open()
@@ -1073,34 +1188,43 @@ function! s:is_preview_window_open()
   return 0
 endfunction
 
+function! s:find_name(lnum)
+  for lnum in reverse(range(1, a:lnum))
+    let line = getline(lnum)
+    if empty(line)
+      return ''
+    endif
+    let name = matchstr(line, '\(^- \)\@<=[^:]\+')
+    if !empty(name)
+      return name
+    endif
+  endfor
+  return ''
+endfunction
+
 function! s:preview_commit()
   if b:plug_preview < 0
     let b:plug_preview = !s:is_preview_window_open()
   endif
 
   let sha = matchstr(getline('.'), '\(^  \)\@<=[0-9a-z]\{7}')
-  if !empty(sha)
+  if empty(sha)
-    let lnum = line('.')
+    return
-    while lnum > 1
+  endif
-      let lnum -= 1
+
-      let line = getline(lnum)
+  let name = s:find_name(line('.'))
-      let name = matchstr(line, '\(^- \)\@<=[^:]\+')
+  if empty(name) || !has_key(g:plugs, name) || !isdirectory(g:plugs[name].dir)
-      if !empty(name)
+    return
-        let dir = g:plugs[name].dir
+  endif
-        if isdirectory(dir)
+
-          execute 'cd '.s:esc(dir)
+  execute 'pedit' sha
-          execute 'pedit '.sha
   wincmd P
   setlocal filetype=git buftype=nofile nobuflisted
-          execute 'silent read !git show '.sha
+  execute 'cd' s:esc(g:plugs[name].dir)
-          normal! ggdd
+  execute 'silent read !git show' sha
-          wincmd p
   cd -
-        endif
+  normal! gg"_dd
-        break
+  wincmd p
-      endif
-    endwhile
-  endif
 endfunction
 
 function! s:section(flags)
@@ -1119,7 +1243,7 @@ function! s:diff()
       continue
     endif
 
-    execute 'cd '.s:esc(v.dir)
+    execute 'cd' s:esc(v.dir)
     let diff = system('git log --pretty=format:"%h %s (%cr)" "HEAD...HEAD@{1}"')
     if !v:shell_error && !empty(diff)
       call append(1, '')
@@ -1134,11 +1258,42 @@ function! s:diff()
 
   call setline(1, cnt == 0 ? 'No updates.' : 'Last update:')
   nnoremap <silent> <buffer> <cr> :silent! call <SID>preview_commit()<cr>
+  nnoremap <silent> <buffer> X    :call <SID>revert()<cr>
   normal! gg
+  setlocal nomodifiable
+  if cnt > 0
+    echo "Press 'X' on each block to revert the update"
+  endif
 endfunction
 
-let s:first_rtp = s:esc(get(split(&rtp, ','), 0, ''))
+function! s:revert()
-let s:last_rtp = s:esc(get(split(&rtp, ','), -1, ''))
+  let name = s:find_name(line('.'))
+  if empty(name) || !has_key(g:plugs, name) ||
+    \ input(printf('Revert the update of %s? (Y/N) ', name)) !~? '^y'
+    return
+  endif
+
+  execute 'cd' s:esc(g:plugs[name].dir)
+  call system('git reset --hard HEAD@{1} && git checkout '.s:esc(g:plugs[name].branch))
+  cd -
+  setlocal modifiable
+  normal! "_dap
+  setlocal nomodifiable
+  echo 'Reverted.'
+endfunction
+
+function! s:split_rtp()
+  return split(&rtp, '\\\@<!,')
+endfunction
+
+let s:first_rtp = s:escrtp(get(s:split_rtp(), 0, ''))
+let s:last_rtp  = s:escrtp(get(s:split_rtp(), -1, ''))
+
+if exists('g:plugs')
+  let g:plugs_order = get(g:, 'plugs_order', keys(g:plugs))
+  call s:upgrade_specs()
+  call s:define_commands()
+endif
 
 let &cpo = s:cpo_save
 unlet s:cpo_save

test/run

@@ -14,8 +14,40 @@ if [ ! -d fzf-staged ]; then
   git clone https://github.com/junegunn/fzf.git fzf-staged
 fi
 
+make_dirs() {
+  mkdir -p "$1"
+  cd "$1"
+  mkdir -p autoload colors ftdetect ftplugin indent plugin syntax
+  for d in *; do
+    [ -d $d ] || continue
+    cat > $d/xxx.vim << EOF
+    " echom expand('<sfile>')
+    let g:total_order = get(g:, 'total_order', [])
+    let g:$2 = get(g:, '$2', [])
+    let s:name = join(filter(['$2', '${1:4}', '$d'], '!empty(v:val)'), '/')
+    call add(g:$2, s:name)
+    call add(g:total_order, s:name)
+EOF
+  done
+  cd - > /dev/null
+}
+
+make_dirs xxx/ xxx
+make_dirs xxx/after xxx
+mkdir -p xxx/doc
+cat > xxx/doc/xxx.txt << DOC
+hello *xxx*
+DOC
+
+make_dirs yyy/ yyy
+make_dirs yyy/after yyy
+
+make_dirs z1/ z1
+make_dirs z2/ z2
+
 cat > /tmp/mini-vimrc << VIMRC
 set rtp+=vader.vim
+set shell=/bin/bash
 source $PLUG_SRC
 VIMRC
 

test/workflow.vader

@@ -1,5 +1,5 @@
 Execute (Initialize test environment):
-  Save &rtp, g:plugs, g:plug_home, $MYVIMRC
+  Save &rtp, g:plugs, g:plug_home, g:plug_window
 
   let first_rtp = split(&rtp, ',')[0]
   let last_rtp  = split(&rtp, ',')[-1]
@@ -11,8 +11,7 @@ Execute (Initialize test environment):
   execute 'set rtp^='.plug
   let basertp = &rtp
 
-  unlet! g:plugs
+  unlet! g:plugs g:plug_home g:plug_window
-  unlet! g:plug_home
 
   set t_Co=256
   colo default
@@ -28,15 +27,22 @@ Execute (Initialize test environment):
   endfunction
 
   function! AssertExpect(bang, pat, cnt)
-    let op = a:bang ? '==' : '=~'
+    let op = a:bang ? '==#' : '=~#'
     AssertEqual a:cnt, len(filter(getline(1, '$'), "v:val ".op." '".a:pat."'"))
   endfunction
   command! -nargs=+ -bang AssertExpect call AssertExpect('<bang>' == '!', <args>)
 
-  let g:vimrc_reloaded = 0
+  function! EnsureLoaded()
-  let vimrc    = tempname()
+    if has('vim_starting')
-  call writefile(['let g:vimrc_reloaded += 1'], vimrc)
+      runtime! plugin/**/*.vim
-  let $MYVIMRC = vimrc
+    endif
+  endfunction
+
+Execute (Print Ruby version):
+  redir => out
+  silent ruby puts RUBY_VERSION
+  redir END
+  Log substitute(out, '\n', '', 'g')
 
 Execute (plug#end() before plug#begin() should fail):
   redir => out
@@ -74,7 +80,7 @@ Execute (Subsequent plug#begin() calls will reuse g:plug_home):
 Execute (Test Plug command):
   " Git repo with branch
   Plug 'junegunn/seoul256.vim', 'yes-t_co'
-  AssertEqual 'https://git:@github.com/junegunn/seoul256.vim.git', g:plugs['seoul256.vim'].uri
+  AssertEqual 'https://git::@github.com/junegunn/seoul256.vim.git', g:plugs['seoul256.vim'].uri
   AssertEqual join([temp_plugged, 'seoul256.vim/'], '/'), g:plugs['seoul256.vim'].dir
   AssertEqual 'yes-t_co', g:plugs['seoul256.vim'].branch
 
@@ -83,7 +89,7 @@ Execute (Test Plug command):
 
   " Git repo with tag
   Plug 'junegunn/goyo.vim', '1.5.2'
-  AssertEqual 'https://git:@github.com/junegunn/goyo.vim.git', g:plugs['goyo.vim'].uri
+  AssertEqual 'https://git::@github.com/junegunn/goyo.vim.git', g:plugs['goyo.vim'].uri
   AssertEqual join([temp_plugged, 'goyo.vim/'], '/'), g:plugs['goyo.vim'].dir
   AssertEqual '1.5.2', g:plugs['goyo.vim'].branch
 
@@ -98,7 +104,7 @@ Execute (Test Plug command):
 
   " vim-scripts/
   Plug 'beauty256'
-  AssertEqual 'https://git:@github.com/vim-scripts/beauty256.git', g:plugs.beauty256.uri
+  AssertEqual 'https://git::@github.com/vim-scripts/beauty256.git', g:plugs.beauty256.uri
   AssertEqual 'master', g:plugs.beauty256.branch
 
   AssertEqual 4, len(g:plugs)
@@ -133,7 +139,6 @@ Execute (Yet, plugins are not available):
 
 Execute (PlugInstall):
   PlugInstall
-  AssertEqual 1, g:vimrc_reloaded
   q
 
 Execute (Plugin available after installation):
@@ -167,7 +172,6 @@ Expect:
 Execute (PlugUpdate to set the right branch):
   PlugUpdate
   call PlugStatusSorted()
-  AssertEqual 2, g:vimrc_reloaded
 
 Expect:
   - goyo.vim: OK
@@ -200,8 +204,8 @@ Execute (PlugStatus):
   call PlugStatusSorted()
 
 Expect:
-      Expected:    https://git:@github.com/junegunn.choi/seoul256.vim.git
+      Expected:    https://git::@github.com/junegunn.choi/seoul256.vim.git
-      Invalid URI: https://git:@github.com/junegunn/seoul256.vim.git
+      Invalid URI: https://git::@github.com/junegunn/seoul256.vim.git
       PlugClean required.
   - vim-emoji: OK
   Finished. 1 error(s).
@@ -234,7 +238,7 @@ Execute (PlugStatus):
   call PlugStatusSorted()
 
 Expect:
-      Expected:    https://git:@github.com/junegunn/vim-emoji.git
+      Expected:    https://git::@github.com/junegunn/vim-emoji.git
       Invalid URI: https://bitbucket.org/junegunn/vim-emoji.git
       Not found. Try PlugInstall.
       PlugClean required.
@@ -254,7 +258,6 @@ Execute (PlugClean! to remove vim-emoji):
 Execute (PlugUpdate to install both again):
   PlugUpdate
   AssertExpect '^- [^:]*:', 2
-  AssertEqual 3, g:vimrc_reloaded
   Assert !empty(globpath(&rtp, 'colors/seoul256.vim')), 'seoul256.vim should be found'
   Assert !empty(globpath(&rtp, 'autoload/emoji.vim')), 'vim-emoji should be found'
   q
@@ -262,7 +265,6 @@ Execute (PlugUpdate to install both again):
 Execute (PlugUpdate only to find out plugins are up-to-date, D key to check):
   PlugUpdate
   AssertExpect 'Already up-to-date', 2
-  AssertEqual 4, g:vimrc_reloaded
   normal D
   AssertEqual 'No updates.', getline(1)
   q
@@ -310,6 +312,13 @@ Execute (Rollback recent updates, PlugUpdate, then PlugDiff):
   AssertEqual lnum, line('.')
   AssertEqual 3, col('.')
 
+  " X key to revert the update
+  AssertExpect '^- ', 2
+  execute "normal Xn\<cr>"
+  AssertExpect '^- ', 2
+  execute "normal Xy\<cr>"
+  AssertExpect '^- ', 1
+
   " q will close preview window as well
   normal q
 
@@ -320,6 +329,7 @@ Execute (Rollback recent updates, PlugUpdate, then PlugDiff):
   " q should not close preview window if it's already open
   pedit
   PlugDiff
+  AssertExpect '^- ', 1
   execute "normal ]]j\<cr>"
   normal q
 
@@ -333,8 +343,8 @@ Execute (Plug window in a new tab):
   set buftype=nofile
   PlugUpdate
   normal D
-  AssertEqual 'No updates.', getline(1)
+  AssertExpect '^- ', 1
-  q
+  normal q
   AssertEqual 'new-tab', expand('%')
   q
   q
@@ -384,9 +394,11 @@ Given (Unaligned code):
   aa=2
 
 Execute (Check installed plugins):
+  call EnsureLoaded()
   Assert exists(':FNR'),           'FNR command should be found'
-  Assert exists(':EasyAlign'),     'EasyAlign command should be found'
   Assert !exists(':RedisExecute'), 'RedisExecute command still should not be found'
+
+  Assert exists(':EasyAlign'), 'EasyAlign command should be found'
   %EasyAlign=
 
 Expect (Aligned code):
@@ -510,15 +522,15 @@ Execute (Frozen plugin are not installed nor updated):
   Plug 'junegunn/vim-easy-align', { 'frozen': 1 }
   call plug#end()
 
-  redir => output
+  redir => out
   silent PlugInstall
   redir END
-  Assert output =~ 'No plugin to install'
+  Assert out =~ 'No plugin to install'
 
-  redir => output
+  redir => out
   silent PlugUpdate
   redir END
-  Assert output =~ 'No plugin to update'
+  Assert out =~ 'No plugin to update'
 
 Execute (But you can still install it if the name is given as the argument):
   PlugInstall vim-easy-align
@@ -625,6 +637,14 @@ Execute (When already installed):
   Assert !filereadable(g:plugs['vim-easy-align'].dir.'/installed2'),
     \ 'vim-easy-align/installed2 should not exist'
   Assert !filereadable(g:plugs['vim-pseudocl'].dir.'/installed2'),
+    \ 'vim-pseudocl/installed2 should not exist'
+
+Execute (PlugInstall!):
+  PlugInstall!
+  q
+  Assert filereadable(g:plugs['vim-easy-align'].dir.'/installed2'),
+    \ 'vim-easy-align/installed2 should exist'
+  Assert filereadable(g:plugs['vim-pseudocl'].dir.'/installed2'),
     \ 'vim-pseudocl/installed2 should exist'
 
 Execute (When already updated):
@@ -638,11 +658,19 @@ Execute (When already updated):
   Assert !filereadable(g:plugs['vim-easy-align'].dir.'/updated2'),
     \ 'vim-easy-align/updated2 should not exist'
   Assert !filereadable(g:plugs['vim-pseudocl'].dir.'/updated2'),
+    \ 'vim-pseudocl/updated2 should not exist'
+
+Execute (PlugUpdate!):
+  PlugUpdate!
+  q
+  Assert filereadable(g:plugs['vim-easy-align'].dir.'/updated2'),
+    \ 'vim-easy-align/updated2 should exist'
+  Assert filereadable(g:plugs['vim-pseudocl'].dir.'/updated2'),
     \ 'vim-pseudocl/updated2 should exist'
 
 Execute (Using Funcref):
   function! PlugUpdated(info)
-    call system('touch '. a:info.name . a:info.status . len(a:info))
+    call system('touch '. a:info.name . a:info.status . a:info.force . len(a:info))
   endfunction
 
   call plug#begin()
@@ -656,11 +684,26 @@ Execute (Using Funcref):
   PlugUpdate
   Log getline(1, '$')
   q
-  Assert filereadable(g:plugs['vim-easy-align'].dir.'/vim-easy-alignupdated2'),
+  Assert filereadable(g:plugs['vim-easy-align'].dir.'/vim-easy-alignupdated03'),
-    \ 'vim-easy-align/vim-easy-alignupdated2 should exist'
+    \ 'vim-easy-align/vim-easy-alignupdated03 should exist'
-  Assert filereadable(g:plugs['vim-pseudocl'].dir.'/vim-pseudoclinstalled2'),
+  Assert filereadable(g:plugs['vim-pseudocl'].dir.'/vim-pseudoclinstalled03'),
-    \ 'vim-pseudocl/vim-pseudoclinstalled2 should exist'
+    \ 'vim-pseudocl/vim-pseudoclinstalled03 should exist'
 
+  call system('rm -rf '.g:plugs['vim-pseudocl'].dir)
+  PlugInstall!
+  q
+  Assert filereadable(g:plugs['vim-easy-align'].dir.'/vim-easy-alignunchanged13'),
+    \ 'vim-easy-align/vim-easy-alignunchanged13 should exist'
+  Assert filereadable(g:plugs['vim-pseudocl'].dir.'/vim-pseudoclinstalled13'),
+    \ 'vim-pseudocl/vim-pseudoclinstalled13 should exist'
+
+  call system('cd '.g:plugs['vim-easy-align'].dir.' && git reset --hard HEAD^')
+  PlugUpdate!
+  q
+  Assert filereadable(g:plugs['vim-easy-align'].dir.'/vim-easy-alignupdated13'),
+    \ 'vim-easy-align/vim-easy-alignupdated13 should exist'
+  Assert filereadable(g:plugs['vim-pseudocl'].dir.'/vim-pseudoclunchanged13'),
+    \ 'vim-pseudocl/vim-pseudoclunchanged13 should exist'
 
 **********************************************************************
 ~ Overriding `dir`
@@ -683,19 +726,298 @@ Execute (Using custom dir):
   q
   Assert isdirectory(g:plugs['vim-easy-align'].dir)
 
-Execute (Cleanup):
+**********************************************************************
-  call system('rm -rf '.temp_plugged)
+~ On-demand loading load order
-  call rename('fzf', 'fzf-staged')
+**********************************************************************
+Before (Clear global vars):
+  let g:xxx = []
+  set rtp-=$PWD/xxx/
+  set rtp-=$PWD/xxx/after
 
-  unlet g:plugs
+Execute (Immediate loading):
-  unlet g:plug_home
+  call plug#begin()
-  unlet g:vimrc_reloaded
+  Plug '$PWD/xxx'
-  unlet temp_plugged vader plug basertp save_rtp repo lnum fzf out
+  call plug#end()
-  delf PlugStatusSorted
+
-  delf AssertExpect
+  " FIXME:
-  delf PlugUpdated
+  " Different result when Vader is run from commandline with `-c` option
-  delc AssertExpect
+  Log g:xxx
-  unmap /
+  if has('vim_starting')
-  unmap ?
+    AssertEqual ['xxx/ftdetect', 'xxx/after/ftdetect'], g:xxx
+  else
+    AssertEqual ['xxx/plugin', 'xxx/after/plugin', 'xxx/ftdetect', 'xxx/after/ftdetect'], g:xxx
+  endif
+
+Execute (Command-based on-demand loading):
+  call plug#begin()
+  Plug '$PWD/xxx', { 'on': 'XXX' }
+  call plug#end()
+
+  AssertEqual [], g:xxx
+
+  silent! XXX
+  AssertEqual ['xxx/ftdetect', 'xxx/after/ftdetect', 'xxx/plugin', 'xxx/after/plugin'], g:xxx
+
+  setf xxx
+  AssertEqual ['xxx/ftdetect', 'xxx/after/ftdetect', 'xxx/plugin', 'xxx/after/plugin', 'xxx/ftplugin', 'xxx/after/ftplugin', 'xxx/indent', 'xxx/after/indent', 'xxx/syntax', 'xxx/after/syntax'], g:xxx
+
+Execute (Filetype-based on-demand loading):
+  call plug#begin()
+  Plug '$PWD/xxx', { 'for': 'xxx' }
+  call plug#end()
+
+  AssertEqual ['xxx/ftdetect', 'xxx/after/ftdetect'], g:xxx
+
+  setf xxx
+  AssertEqual ['xxx/ftdetect', 'xxx/after/ftdetect', 'xxx/plugin', 'xxx/after/plugin', 'xxx/ftplugin', 'xxx/after/ftplugin', 'xxx/indent', 'xxx/after/indent', 'xxx/syntax', 'xxx/after/syntax'], g:xxx
+
+Before:
+
+**********************************************************************
+~ plug#helptags()
+**********************************************************************
+
+Execute (plug#helptags):
+  silent! call delete(expand('$PWD/xxx/doc/tags'))
+  Assert !filereadable(expand('$PWD/xxx/doc/tags'))
+  AssertEqual 1, plug#helptags()
+  Assert filereadable(expand('$PWD/xxx/doc/tags'))
+
+**********************************************************************
+~ Manual loading
+**********************************************************************
+
+Execute (plug#load - invalid arguments):
+  AssertEqual 0, plug#load()
+  AssertEqual 0, plug#load('non-existent-plugin')
+  AssertEqual 0, plug#load('non-existent-plugin', 'another-non-existent-plugin')
+  AssertEqual 1, plug#load('xxx')
+  AssertEqual 0, plug#load('xxx', 'non-existent-plugin')
+  AssertEqual 0, plug#load('non-existent-plugin', 'xxx')
+
+Execute (on: []):
+  call plug#begin()
+  Plug 'junegunn/rust.vim', { 'on': [] }
+  call plug#end()
+  PlugInstall
+  q
+
+Execute (PlugStatus reports (not loaded)):
+  PlugStatus
+  AssertExpect 'not loaded', 1
+  q
+
+Execute (plug#load to load it):
+  tabnew test.rs
+  " Vader will switch tab to [Vader-workbench] after Log
+  " Log &filetype
+  AssertEqual 1, plug#load('rust.vim')
+  AssertEqual 'rust', &filetype
+  q
+
+Execute (PlugStatus should not contain (not loaded)):
+  PlugStatus
+  AssertExpect 'not loaded', 0
+  q
+
+Execute (Load plugin from PlugStatus screen with L key in normal mode):
+  call plug#begin()
+  Plug '$PWD/yyy', { 'on': [] }
+  call plug#end()
+
+  PlugStatus
+  AssertExpect 'not loaded', 1
+  Assert !exists('g:yyy'), 'yyy not loaded'
+  /not loaded
+  normal L
+  AssertExpect 'not loaded', 0
+  Assert exists('g:yyy'), 'yyy loaded'
+  q
+
+Execute (Load plugin from PlugStatus screen with L key in visual mode):
+  call plug#begin()
+  Plug '$PWD/z1', { 'on':  [] }
+  Plug '$PWD/z2', { 'for': [] }
+  call plug#end()
+
+  PlugStatus
+  AssertExpect 'not loaded', 2
+  Assert !exists('g:z1'), 'z1 not loaded'
+  Assert !exists('g:z2'), 'z2 not loaded'
+  normal ggVGL
+  AssertExpect 'not loaded', 0
+  Assert exists('g:z1'), 'z1 loaded'
+  Assert exists('g:z2'), 'z2 loaded'
+  q
+
+**********************************************************************
+~ g:plug_window
+**********************************************************************
+Execute (Open plug window in a new tab):
+  " Without g:plug_window, plug window is open on the left split
+  let tabnr = tabpagenr()
+  PlugStatus
+  AssertEqual tabnr, tabpagenr()
+  AssertEqual 1, winnr()
+
+  " PlugStatus again inside the window should not change the view
+  normal S
+  AssertEqual tabnr, tabpagenr()
+  AssertEqual 1, winnr()
+  q
+
+  " Define g:plug_window so that plug window is open in a new tab
+  let g:plug_window = 'tabnew'
+  PlugStatus
+  AssertNotEqual tabnr, tabpagenr()
+
+  " PlugStatus again inside the window should not change the view
+  let tabnr = tabpagenr()
+  normal S
+  AssertEqual tabnr, tabpagenr()
+  q
+  unlet g:plug_window
+
+**********************************************************************
+~ g:plug_url_format
+**********************************************************************
+Execute (Using g:plug_url_format):
+  call plug#begin()
+  let g:plug_url_format = 'git@bitbucket.org:%s.git'
+  Plug 'junegunn/seoul256.vim'
+  let g:plug_url_format = 'git@bitsocket.org:%s.git'
+  Plug 'beauty256'
+  AssertEqual 'git@bitbucket.org:junegunn/seoul256.vim.git', g:plugs['seoul256.vim'].uri
+  AssertEqual 'git@bitsocket.org:vim-scripts/beauty256.git', g:plugs['beauty256'].uri
+  unlet g:plug_url_format
+
+**********************************************************************
+~ U
+**********************************************************************
+Execute (Plug block):
+  call plug#begin()
+  Plug 'junegunn/vim-easy-align'
+  Plug 'junegunn/vim-emoji'
+  call plug#end()
+
+Execute (Update plugin with U key in normal mode):
+  PlugStatus
+  /emoji
+  normal U
+  Log getline(1, '$')
+  AssertExpect 'Updated', 1
+  AssertExpect 'vim-emoji', 1
+  AssertExpect 'vim-easy-align', 0
+  AssertExpect! '[=]', 1
+
+  " From PlugInstall screen
+  PlugInstall
+  /easy-align
+  normal U
+  AssertExpect 'Updated', 1
+  AssertExpect 'vim-emoji', 0
+  AssertExpect 'vim-easy-align', 1
+  AssertExpect! '[=]', 1
+  q
+
+Execute (Update plugins with U key in visual mode):
+  silent! call system('rm -rf '.g:plugs['vim-easy-align'].dir)
+
+  PlugStatus
+  normal VGU
+  Log getline(1, '$')
+  AssertExpect 'Updated', 1
+  AssertExpect 'vim-emoji', 1
+  AssertExpect 'vim-easy-align', 1
+  AssertExpect! '[==]', 1
+
+  " From PlugUpdate screen
+  normal VGU
+  Log getline(1, '$')
+  AssertExpect 'Updated', 1
+  AssertExpect 'vim-emoji', 1
+  AssertExpect 'vim-easy-align', 1
+  AssertExpect! '[==]', 1
+  q
+
+**********************************************************************
+Execute (plug#begin should expand env vars):
+  AssertNotEqual '$HOME/.emacs/plugged', expand('$HOME/.emacs/plugged')
+  call plug#begin('$HOME/.emacs/plugged')
+  AssertEqual expand('$HOME/.emacs/plugged'), g:plug_home
+
+**********************************************************************
+Execute (Plug directory with comma):
+  call plug#begin(temp_plugged . '/p,l,u,g,g,e,d')
+  Plug 'junegunn/vim-emoji'
+  call plug#end()
+  Log &rtp
+
+  PlugInstall
+  q
+  let found = filter(split(globpath(&rtp, 'README.md'), '\n'), 'v:val =~ ","')
+  Log found
+  AssertEqual 1, len(found)
+
+**********************************************************************
+Execute (Strict load order):
+  let g:total_order = []
+  call plug#begin()
+  Plug '$PWD/xxx'
+  Plug '$PWD/yyy', { 'for': ['xxx'] }
+  call plug#end()
+  call EnsureLoaded()
+  setf xxx
+  Log 'Case 1: ' . &rtp
+  AssertEqual ['yyy/ftdetect', 'yyy/after/ftdetect', 'xxx/ftdetect', 'xxx/after/ftdetect'], g:total_order[0:3]
+  Assert index(g:total_order, 'xxx/plugin') < index(g:total_order, 'yyy/plugin')
+  Assert index(g:total_order, 'xxx/after/plugin') < index(g:total_order, 'yyy/after/plugin')
+  let len = len(split(&rtp, ','))
+
+  let g:total_order = []
+  call plug#begin()
+  Plug '$PWD/xxx', { 'for': ['xxx'] }
+  Plug '$PWD/yyy'
+  call plug#end()
+  call EnsureLoaded()
+  set rtp^=manually-prepended
+  set rtp+=manually-appended
+  setf xxx
+  Log 'Case 2: ' . &rtp
+  AssertEqual 'manually-prepended', split(&rtp, ',')[3]
+  AssertEqual 'manually-appended',  split(&rtp, ',')[-4]
+  AssertEqual ['xxx/ftdetect', 'xxx/after/ftdetect', 'yyy/ftdetect', 'yyy/after/ftdetect'], g:total_order[0:3]
+  Assert index(g:total_order, 'yyy/plugin') < index(g:total_order, 'xxx/plugin')
+  Assert index(g:total_order, 'yyy/after/plugin') < index(g:total_order, 'xxx/after/plugin')
+  AssertEqual len + 2, len(split(&rtp, ','))
+
+  let g:total_order = []
+  call plug#begin()
+  Plug '$PWD/xxx', { 'for': ['xxx'] }
+  Plug '$PWD/yyy', { 'for': ['xxx'] }
+  call plug#end()
+  call EnsureLoaded()
+  setf xxx
+  Log 'Case 3: ' . &rtp
+  AssertEqual ['xxx/ftdetect', 'xxx/after/ftdetect', 'yyy/ftdetect', 'yyy/after/ftdetect'], g:total_order[0:3]
+  Assert index(g:total_order, 'xxx/plugin') < index(g:total_order, 'yyy/plugin')
+  Assert index(g:total_order, 'xxx/after/plugin') < index(g:total_order, 'yyy/after/plugin')
+  AssertEqual len + 2, len(split(&rtp, ','))
+
+Execute (Cleanup):
+  silent! call system('rm -rf '.temp_plugged)
+  silent! call rename('fzf', 'fzf-staged')
+  silent! unlet g:plugs
+  silent! unlet g:plug_home
+  silent! unlet g:plug_url_format
+  silent! unlet temp_plugged vader plug basertp save_rtp repo lnum fzf out tabnr found len
+  silent! delf PlugStatusSorted
+  silent! delf AssertExpect
+  silent! delf PlugUpdated
+  silent! delf EnsureLoaded
+  silent! delc AssertExpect
+  silent! unmap /
+  silent! unmap ?
 
   Restore
+