Perf: identify newly installed commands as commands

highlighters/main/main-highlighter.zsh

@@ -170,9 +170,17 @@ _zsh_highlight_main__type() {
     # ZSH_VERSION >= 5.1 allows the use of #q. ZSH_VERSION <= 5.8 allows skipping
     # 'type -w' calls that are necessary for forward compatibility.
     elif [[ $ZSH_VERSION == 5.<1-8>(|.*) ]]; then
-      if [[ -n $1(#qN-.*) ||
+      if [[ $1 == */* && -n $1(#qN-.*) ||
             $1 == [^/]*/* && $zsyh_user_options[pathdirs] == on && -n ${^path}/$1(#q-N.*) ]]; then
         REPLY=command
+      elif (( _zsh_highlight_main__rehash )); then
+        builtin rehash
+        _zsh_highlight_main__rehash=0
+        if (( $+commands[$1] )); then
+          REPLY=command
+        else
+          REPLY=none
+        fi
       else
         REPLY=none
       fi
@@ -1135,7 +1143,7 @@ _zsh_highlight_main_highlighter_check_path()
           fi
           return 0
         elif [[ ! -d $expanded_path ]]; then
-          REPLY=command
+          # ### This seems unreachable for the current callers
           return 0
         fi
       fi
@@ -1744,6 +1752,8 @@ _zsh_highlight_main__precmd_hook() {
   _zsh_highlight_main__path_cache=()
   _zsh_highlight_main__arg_cache=()
 
+  _zsh_highlight_main__rehash=1
+
   if [[ $ZSH_VERSION != (5.<9->*|<6->.*) ]]; then
     _zsh_highlight_main_calculate_styles
   fi
@@ -1753,10 +1763,12 @@ autoload -Uz add-zsh-hook
 if add-zsh-hook precmd _zsh_highlight_main__precmd_hook 2>/dev/null; then
   # Initialize caches
   typeset -gA _zsh_highlight_main__command_type_cache _zsh_highlight_main__path_cache _zsh_highlight_main__arg_cache
+  typeset -gi _zsh_highlight_main__rehash=1
 else
   print -r -- >&2 'zsh-syntax-highlighting: Failed to load add-zsh-hook. Some speed optimizations will not be used.'
   # Make sure the caches are unset
   unset _zsh_highlight_main__command_type_cache _zsh_highlight_main__path_cache _zsh_highlight_main__arg_cache
+  unset _zsh_highlight_main__rehash
 fi
 typeset -ga ZSH_HIGHLIGHT_DIRS_BLACKLIST
 

highlighters/main/test-data/new-command.zsh

@@ -0,0 +1,44 @@
+# -------------------------------------------------------------------------------------------------
+# Copyright (c) 2015 zsh-syntax-highlighting contributors
+# All rights reserved.
+#
+# Redistribution and use in source and binary forms, with or without modification, are permitted
+# provided that the following conditions are met:
+#
+#  * Redistributions of source code must retain the above copyright notice, this list of conditions
+#    and the following disclaimer.
+#  * Redistributions in binary form must reproduce the above copyright notice, this list of
+#    conditions and the following disclaimer in the documentation and/or other materials provided
+#    with the distribution.
+#  * Neither the name of the zsh-syntax-highlighting contributors nor the names of its contributors
+#    may be used to endorse or promote products derived from this software without specific prior
+#    written permission.
+#
+# THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND ANY EXPRESS OR
+# IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND
+# FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR
+# CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+# DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+# DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER
+# IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT
+# OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+# -------------------------------------------------------------------------------------------------
+# -*- mode: zsh; sh-indentation: 2; indent-tabs-mode: nil; sh-basic-offset: 2; -*-
+# vim: ft=zsh sw=2 ts=2 et
+# -------------------------------------------------------------------------------------------------
+
+if [[ $OSTYPE == msys ]]; then
+  skip_test='Cannot chmod +x in msys2'
+else
+  path+=($PWD/foo)
+  : $+commands[zsyh-new-command]
+  mkdir foo
+  print >foo/zsyh-new-command
+  chmod +x foo/zsyh-new-command
+
+  BUFFER='zsyh-new-command'
+
+  expected_region_highlight=(
+    "1 16 command"
+  )
+fi