Use powerlevel10k instant prompt with zim+

Zim does play well with powerlevel10k instant prompt. It also "has one
function to install plugins and another to load them", contratry to what
the zsh-bench README.md mentions.

configs/zim+/setup

@@ -3,16 +3,3 @@
 emulate -L zsh -o err_return
 
 cp -r -- ${ZSH_SCRIPT:h}/skel/*(D) ~/
-
-git clone -q --depth=1 https://github.com/zimfw/install.git ~/install
-git clone -q --depth=1 https://github.com/zimfw/zimfw.git ~/.zim
-
-() {
-  local rc
-  for rc in zshenv zshrc zlogin; do
-    <~/install/src/templates/$rc >>~/.$rc
-  done
-}
-
-rm -rf -- ~/install
-zsh ~/.zim/zimfw.zsh install >/dev/null

configs/zim+/skel/.zimrc

@@ -1,4 +1,4 @@
 zmodule completion
-zmodule romkatv/powerlevel10k
-zmodule zsh-users/zsh-autosuggestions
 zmodule zsh-users/zsh-syntax-highlighting
+zmodule zsh-users/zsh-autosuggestions
+zmodule romkatv/powerlevel10k

configs/zim+/skel/.zshenv

@@ -1 +1,4 @@
 setopt no_global_rcs
+
+# Define Zim location
+ZIM_HOME=~/.zim

configs/zim+/skel/.zshrc

@@ -1,10 +1,25 @@
+# If not in tmux, start tmux.
 if [[ -z ${TMUX+X}${ZSH_SCRIPT+X}${ZSH_EXECUTION_STRING+X} ]]; then
   exec tmux
 fi
 
+if [[ ! -e ${ZIM_HOME}/zimfw.zsh ]]; then
+  # Download zimfw script if missing.
+  command curl -fsSL --create-dirs -o ${ZIM_HOME}/zimfw.zsh https://github.com/zimfw/zimfw/releases/latest/download/zimfw.zsh
+fi
+if [[ ! ${ZIM_HOME}/init.zsh -nt ${ZDOTDIR:-${HOME}}/.zimrc ]]; then
+  # Install missing modules, and update ${ZIM_HOME}/init.zsh if missing or outdated.
+  source ${ZIM_HOME}/zimfw.zsh init -q
+fi
+
+# Activate Powerlevel10k Instant Prompt.
 if [[ -r "${XDG_CACHE_HOME:-$HOME/.cache}/p10k-instant-prompt-${(%):-%n}.zsh" ]]; then
   source "${XDG_CACHE_HOME:-$HOME/.cache}/p10k-instant-prompt-${(%):-%n}.zsh"
 fi
 
 ZSH_AUTOSUGGEST_MANUAL_REBIND=1
+
+# Load plugins.
+source ${ZIM_HOME}/init.zsh
+
 source ~/.p10k.zsh