feat: add tracing feature, CLI and web viewer

hooks/zshenv

@@ -0,0 +1,58 @@
+omzp:start() {
+  setopt localoptions localtraps
+
+  # initialization
+  zmodload zsh/datetime
+  typeset -Ag __OMZP
+  __OMZP=(
+    PS4     "$PS4" 
+    start   "$EPOCHREALTIME"
+    outfile "${1:-$HOME}/${${SHELL:t}#-}.$EPOCHSECONDS.$$.zsh-trace.log"
+  )
+  typeset -g PS4="+Z|%e|%D{%s.%9.}|%N|%x|%I> "
+
+  # unload profiler on startup end
+  autoload -Uz add-zsh-hook
+  add-zsh-hook precmd omzp:stop
+
+  # redirect debug output to profiler log file
+  exec 3>&2 2>${__OMZP[outfile]}
+
+  # enable zsh debug mode
+  trap 'setopt xtrace noevallineno' EXIT
+}
+
+# Force this function to be executed in noxtrace mode
+emulate zsh +x -c '
+omzp:stop() {
+  setopt localoptions localtraps
+  trap "{ setopt noxtrace evallineno } 2>/dev/null; exec 2>&3 3>&-" EXIT
+
+  # restore PS4
+  typeset -g PS4="$__OMZP[PS4]"
+  unset "__OMZP[PS4]"
+
+  # remove precmd function
+  add-zsh-hook -d precmd omzp:stop
+  unfunction omzp:stop
+
+  local startup=$(( (${(%):-"%D{%s.%9.}"} - __OMZP[start]) * 1e3 ))
+  printf "%.3f ms – %s \n" "$startup" "${__OMZP[outfile]:t}"
+}'
+
+# TODO: this is duplicated from init script, fix later
+# Init $ZSH path
+[[ -n "$ZSH" ]] || export ZSH="${${(%):-%x}:a:h:h}"
+
+# Set ZSH_CACHE_DIR to the path where cache files should be created
+# or else we will use the default cache/
+[[ -n "$ZSH_CACHE_DIR" ]] || ZSH_CACHE_DIR="$ZSH/cache"
+
+# Make sure $ZSH_CACHE_DIR is writable, otherwise use a directory in $HOME
+if [[ ! -w "$ZSH_CACHE_DIR" ]]; then
+  ZSH_CACHE_DIR="${XDG_CACHE_HOME:-$HOME/.cache}/oh-my-zsh"
+fi
+
+# Set OMZ_TRACES directory
+OMZ_TRACES="${OMZ_TRACES:-"$ZSH_CACHE_DIR/.traces"}"
+! 'builtin' 'test' -f "${OMZ_TRACES}/.enabled" || omzp:start "$OMZ_TRACES"