Refactor shell setup into ~/.zshenv and ~/.zshrc files

It was time to split the environment related stuff out to ~/.zshenv,
leaving my ~/.zshrc file specifically for setup of interactive shells.

zshrc

@@ -0,0 +1,122 @@
+#
+# Z-Shell Init
+#
+
+# Fix PATH re-ordering done by macOS, by loading ~/.zshenv again.
+if [[ "$(uname)" == "Darwin" ]] && [ -x "/usr/libexec/path_helper" ]; then
+  source "$HOME/.zshenv"
+fi
+
+
+# ==============================================================================
+# zplug
+# ==============================================================================
+
+ZPLUG_HOME="$DOTZSH/zplug/zplug"
+ZPLUG_CACHE_DIR="$DOTZSH/zplug/cache"
+ZPLUG_REPOS="$DOTZSH/zplug/repos"
+
+source "$ZPLUG_HOME/init.zsh"
+alias zp="zplug"
+
+zplug "lib/history", from:oh-my-zsh, defer:1
+zplug "lib/completion", from:oh-my-zsh, defer:1
+zplug "jimeh/zsh-peco-history", defer:2
+zplug "plugins/bundler", from:oh-my-zsh
+zplug "plugins/git", from:oh-my-zsh
+zplug "zsh-users/zsh-completions"
+zplug "zsh-users/zsh-autosuggestions"
+zplug "zsh-users/zsh-syntax-highlighting", defer:3
+
+zplug "jimeh/plain.zsh-theme", as:theme
+
+# Install plugins if there are plugins that have not been installed
+if ! zplug check --verbose; then
+  printf "Install? [y/N]: "
+  if read -q; then
+    echo
+    zplug install
+  fi
+fi
+
+# Configure zsh-syntax-highlighting
+if zplug check zsh-users/zsh-syntax-highlighting; then
+  ZSH_HIGHLIGHT_HIGHLIGHTERS=(main brackets)
+fi
+
+zplug load
+
+
+# ==============================================================================
+# Private Dotfiles
+# ==============================================================================
+
+if [ -f "$DOTPFILES/zshrc" ]; then
+  source "$DOTPFILES/zshrc"
+fi
+
+
+# ==============================================================================
+# Completion
+# ==============================================================================
+
+# Enable bash-style completion.
+autoload -Uz +X compinit && compinit
+autoload -Uz +X bashcompinit && bashcompinit
+
+fpath=("$DOTZSH/completion" "${fpath[@]}")
+
+
+# ==============================================================================
+# Tool specific setup
+# ==============================================================================
+
+# Aliases
+source "$DOTZSH/aliases.zsh"
+
+# OS specific
+if [[ "$(uname)" == "Darwin" ]]; then source "$DOTZSH/macos.zsh"; fi
+if [[ "$(uname)" == "Linux" ]]; then source "$DOTZSH/linux.zsh"; fi
+
+# Utils
+source "$DOTZSH/emacs.zsh"
+source "$DOTZSH/git.zsh"
+source "$DOTZSH/less.zsh"
+source "$DOTZSH/tmux.zsh"
+
+# Development
+source "$DOTZSH/docker.zsh"
+source "$DOTZSH/golang.zsh"
+source "$DOTZSH/google-cloud.zsh"
+source "$DOTZSH/kubernetes.zsh"
+source "$DOTZSH/nodejs.zsh"
+source "$DOTZSH/python.zsh"
+source "$DOTZSH/ruby.zsh"
+source "$DOTZSH/rust.zsh"
+
+if [ -f "$DOTPFILES/shellrc.sh" ]; then
+  source "$DOTPFILES/shellrc.sh"
+fi
+
+
+# ==============================================================================
+# Basic Z-Shell settings
+# ==============================================================================
+
+# Disable auto-title.
+DISABLE_AUTO_TITLE="true"
+
+# Disable shared history.
+unsetopt share_history
+
+# Disable attempted correction of commands (is wrong 98% of the time).
+unsetopt correctall
+
+
+# ==============================================================================
+# Local Overrides
+# ==============================================================================
+
+if [ -f "$HOME/.zshrc.local" ]; then
+  source "$HOME/.zshrc.local"
+fi