Updating plug.vim

.vim/autoload/plug.vim

@@ -24,11 +24,14 @@
 "   " Using git URL
 "   Plug 'https://github.com/junegunn/vim-github-dashboard.git'
 "
+"   " Using a non-master branch
+"   Plug 'rdnetto/YCM-Generator', { 'branch': 'stable' }
+
 "   " Plugin options
 "   Plug 'nsf/gocode', { 'tag': 'v.20150303', 'rtp': 'vim' }
 "
 "   " Plugin outside ~/.vim/plugged with post-update hook
-"   Plug 'junegunn/fzf', { 'dir': '~/.fzf', 'do': 'yes \| ./install' }
+"   Plug 'junegunn/fzf', { 'dir': '~/.fzf', 'do': './install --all' }
 "
 "   " Unmanaged plugin (manually installed and updated)
 "   Plug '~/my-prototype-plugin'
@@ -172,11 +175,14 @@ function! plug#end()
             call s:assoc(lod.map, cmd, name)
           endif
           call add(s:triggers[name].map, cmd)
-        elseif cmd =~ '^[A-Z]'
+        elseif cmd =~# '^[A-Z]'
           if exists(':'.cmd) != 2
             call s:assoc(lod.cmd, cmd, name)
           endif
           call add(s:triggers[name].cmd, cmd)
+        else
+          call s:err('Invalid `on` option: '.cmd.
+          \ '. Should start with an uppercase letter or `<Plug>`.')
         endif
       endfor
     endif
@@ -294,7 +300,7 @@ endif
 
 function! s:err(msg)
   echohl ErrorMsg
-  echom a:msg
+  echom '[vim-plug] '.a:msg
   echohl None
   return 0
 endfunction
@@ -646,10 +652,11 @@ function! s:do(pull, force, todo)
     endif
     let installed = has_key(s:update.new, name)
     let updated = installed ? 0 :
-      \ (a:pull && !empty(s:system_chomp('git log --pretty=format:"%h" "HEAD...HEAD@{1}"', spec.dir)))
+      \ (a:pull && index(s:update.errors, name) < 0 && !empty(s:system_chomp('git log --pretty=format:"%h" "HEAD...HEAD@{1}"', spec.dir)))
     if a:force || installed || updated
       execute 'cd' s:esc(spec.dir)
       call append(3, '- Post-update hook for '. name .' ... ')
+      let error = ''
       let type = type(spec.do)
       if type == s:TYPE.string
         try
@@ -658,21 +665,23 @@ function! s:do(pull, force, todo)
           let g:_plug_do = '!'.escape(spec.do, '#!%')
           execute "normal! :execute g:_plug_do\<cr>\<cr>"
         finally
-          let result = v:shell_error ? ('Exit status: '.v:shell_error) : 'Done!'
+          if v:shell_error
+            let error = 'Exit status: ' . v:shell_error
+          endif
           unlet g:_plug_do
         endtry
       elseif type == s:TYPE.funcref
         try
           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
+          let error = v:exception
         endtry
       else
-        let result = 'Error: Invalid type!'
+        let error = 'Invalid hook type'
       endif
-      call setline(4, getline(4) . result)
+      call setline(4, empty(error) ? (getline(4) . 'OK')
+                                 \ : ('x' . getline(4)[1:] . error))
       cd -
     endif
   endfor
@@ -1050,17 +1059,17 @@ G_LOG_PROB = 1.0 / int(vim.eval('s:update.threads'))
 G_STOP = thr.Event()
 G_THREADS = {}
 
-class BaseExc(Exception):
+class PlugError(Exception):
   def __init__(self, msg):
     self._msg = msg
   @property
   def msg(self):
     return self._msg
-class CmdTimedOut(BaseExc):
+class CmdTimedOut(PlugError):
   pass
-class CmdFailed(BaseExc):
+class CmdFailed(PlugError):
   pass
-class InvalidURI(BaseExc):
+class InvalidURI(PlugError):
   pass
 class Action(object):
   INSTALL, UPDATE, ERROR, DONE = ['+', '*', 'x', '-']
@@ -1074,7 +1083,7 @@ class Buffer(object):
     self.maxy = int(vim.eval('winheight(".")'))
     self.num_plugs = num_plugs
 
-  def _where(self, name):
+  def __where(self, name):
     """ Find first line with name in current buffer. Return line num. """
     found, lnum = False, 0
     matcher = re.compile('^[-+x*] {0}:'.format(name))
@@ -1103,8 +1112,7 @@ class Buffer(object):
   def write(self, action, name, lines):
     first, rest = lines[0], lines[1:]
     msg = ['{0} {1}{2}{3}'.format(action, name, ': ' if first else '', first)]
-    padded_rest = ['    ' + line for line in rest]
+    msg.extend(['    ' + line for line in rest])
-    msg.extend(padded_rest)
 
     try:
       if action == Action.ERROR:
@@ -1114,7 +1122,7 @@ class Buffer(object):
         self.bar += '='
 
       curbuf = vim.current.buffer
-      lnum = self._where(name)
+      lnum = self.__where(name)
       if lnum != -1: # Found matching line num
         del curbuf[lnum]
         if lnum > self.maxy and action in set([Action.INSTALL, Action.UPDATE]):
@@ -1128,27 +1136,40 @@ class Buffer(object):
       pass
 
 class Command(object):
-  def __init__(self, cmd, cmd_dir=None, timeout=60, ntries=3, cb=None, clean=None):
+  def __init__(self, cmd, cmd_dir=None, timeout=60, cb=None, clean=None):
     self.cmd = cmd
     self.cmd_dir = cmd_dir
     self.timeout = timeout
-    self.ntries = ntries
     self.callback = cb if cb else (lambda msg: None)
-    self.clean = clean
+    self.clean = clean if clean else (lambda: None)
+    self.proc = None
 
-  def attempt_cmd(self):
+  @property
-    """ Tries to run the command, returns result if no exceptions. """
+  def alive(self):
-    attempt = 0
+    """ Returns true only if command still running. """
-    finished = False
+    return self.proc and self.proc.poll() is None
-    limit = self.timeout
+
+  def execute(self, ntries=3):
+    """ Execute the command with ntries if CmdTimedOut.
+        Returns the output of the command if no Exception.
+    """
+    attempt, finished, limit = 0, False, self.timeout
 
     while not finished:
       try:
         attempt += 1
-        result = self.timeout_cmd()
+        result = self.try_command()
         finished = True
+        return result
       except CmdTimedOut:
-        if attempt != self.ntries:
+        if attempt != ntries:
+          self.notify_retry()
+          self.timeout += limit
+        else:
+          raise
+
+  def notify_retry(self):
+    """ Retry required for command, notify user. """
     for count in range(3, 0, -1):
       if G_STOP.is_set():
         raise KeyboardInterrupt
@@ -1156,28 +1177,32 @@ class Command(object):
             count, 's' if count != 1 else '')
       self.callback([msg])
       time.sleep(1)
-          self.timeout += limit
     self.callback(['Retrying ...'])
-        else:
-          raise
 
-    return result
+  def try_command(self):
-
-  def timeout_cmd(self):
     """ Execute a cmd & poll for callback. Returns list of output.
         Raises CmdFailed   -> return code for Popen isn't 0
         Raises CmdTimedOut -> command exceeded timeout without new output
     """
-    proc = None
     first_line = True
-    try:
-      tfile = tempfile.NamedTemporaryFile(mode='w+b', delete=False)
-      proc = subprocess.Popen(self.cmd, cwd=self.cmd_dir, stdout=tfile,
-          stderr=subprocess.STDOUT, shell=True, preexec_fn=os.setsid)
-      while proc.poll() is None:
-        # Yield this thread
-        time.sleep(0.2)
 
+    try:
+      tfile = tempfile.NamedTemporaryFile(mode='w+b')
+      self.proc = subprocess.Popen(self.cmd, cwd=self.cmd_dir, stdout=tfile,
+                                   stderr=subprocess.STDOUT, shell=True,
+                                   preexec_fn=os.setsid)
+      thrd = thr.Thread(target=(lambda proc: proc.wait()), args=(self.proc,))
+      thrd.start()
+
+      thread_not_started = True
+      while thread_not_started:
+        try:
+          thrd.join(0.1)
+          thread_not_started = False
+        except RuntimeError:
+          pass
+
+      while self.alive:
         if G_STOP.is_set():
           raise KeyboardInterrupt
 
@@ -1191,23 +1216,24 @@ class Command(object):
         if time_diff > self.timeout:
           raise CmdTimedOut(['Timeout!'])
 
+        thrd.join(0.5)
+
       tfile.seek(0)
       result = [line.decode('utf-8', 'replace').rstrip() for line in tfile]
 
-      if proc.returncode != 0:
+      if self.proc.returncode != 0:
-        msg = ['']
+        raise CmdFailed([''] + result)
-        msg.extend(result)
-        raise CmdFailed(msg)
-    except:
-      if proc and proc.poll() is None:
-        os.killpg(proc.pid, signal.SIGTERM)
-      if self.clean:
-        self.clean()
-      raise
-    finally:
-      os.remove(tfile.name)
 
       return result
+    except:
+      self.terminate()
+      raise
+
+  def terminate(self):
+    """ Terminate process and cleanup. """
+    if self.alive:
+      os.killpg(self.proc.pid, signal.SIGTERM)
+    self.clean()
 
 class Plugin(object):
   def __init__(self, name, args, buf_q, lock):
@@ -1228,7 +1254,7 @@ class Plugin(object):
         self.install()
         with self.lock:
           thread_vim_command("let s:update.new['{0}'] = 1".format(self.name))
-    except (CmdTimedOut, CmdFailed, InvalidURI) as exc:
+    except PlugError as exc:
       self.write(Action.ERROR, self.name, exc.msg)
     except KeyboardInterrupt:
       G_STOP.set()
@@ -1253,11 +1279,18 @@ class Plugin(object):
     self.write(Action.INSTALL, self.name, ['Installing ...'])
     callback = functools.partial(self.write, Action.INSTALL, self.name)
     cmd = 'git clone {0} {1} --recursive {2} -b {3} {4} 2>&1'.format(
-        '' if self.tag else G_CLONE_OPT, G_PROGRESS, self.args['uri'], self.checkout, esc(target))
+          '' if self.tag else G_CLONE_OPT, G_PROGRESS, self.args['uri'],
-    com = Command(cmd, None, G_TIMEOUT, G_RETRIES, callback, clean(target))
+          self.checkout, esc(target))
-    result = com.attempt_cmd()
+    com = Command(cmd, None, G_TIMEOUT, callback, clean(target))
+    result = com.execute(G_RETRIES)
     self.write(Action.DONE, self.name, result[-1:])
 
+  def repo_uri(self):
+    cmd = 'git rev-parse --abbrev-ref HEAD 2>&1 && git config remote.origin.url'
+    command = Command(cmd, self.args['dir'], G_TIMEOUT,)
+    result = command.execute(G_RETRIES)
+    return result[-1]
+
   def update(self):
     match = re.compile(r'git::?@')
     actual_uri = re.sub(match, '', self.repo_uri())
@@ -1278,18 +1311,12 @@ class Plugin(object):
               'git merge --ff-only {0}'.format(self.merge),
               'git submodule update --init --recursive']
       cmd = ' 2>&1 && '.join(cmds)
-      com = Command(cmd, self.args['dir'], G_TIMEOUT, G_RETRIES, callback)
+      com = Command(cmd, self.args['dir'], G_TIMEOUT, callback)
-      result = com.attempt_cmd()
+      result = com.execute(G_RETRIES)
       self.write(Action.DONE, self.name, result[-1:])
     else:
       self.write(Action.DONE, self.name, ['Already installed'])
 
-  def repo_uri(self):
-    cmd = 'git rev-parse --abbrev-ref HEAD 2>&1 && git config remote.origin.url'
-    command = Command(cmd, self.args['dir'], G_TIMEOUT, G_RETRIES)
-    result = command.attempt_cmd()
-    return result[-1]
-
   def write(self, action, name, msg):
     self.buf_q.put((action, name, msg))
 
@@ -1326,7 +1353,7 @@ class RefreshThread(thr.Thread):
     while self.running:
       with self.lock:
         thread_vim_command('noautocmd normal! a')
-      time.sleep(0.2)
+      time.sleep(0.33)
 
   def stop(self):
     self.running = False