feat(zsh): Break up Zsh configuration files

 1. zshenv: path.zsh, env.zsh
 2. zprofile: profile.zsh
 3. zshrc: *.zsh, completion.zsh
 4. zlogin: login.zsh
 5. zlogout: logout.zsh

WIP: dysfungi/dotfiles#10

README.md

@@ -59,8 +59,9 @@ script/bootstrap
 This will symlink the appropriate files in `.dotfiles` to your home directory.
 Everything is configured and tweaked within `~/.dotfiles`.
 
-The main file you'll want to change right off the bat is `zsh/zshrc.symlink`,
-which sets up a few paths that'll be different on your particular machine.
+The main file you'll want to change right off the bat is
+`zsh/zshenv.symlink`, which sets up a few paths that'll be different on
+your particular machine.
 
 `dot` is a simple script that installs some dependencies, sets sane macOS
 defaults, and so on. Tweak this script, and occasionally run `dot` from

zsh/zlogin.symlink

@@ -0,0 +1,16 @@
+# NOTE: Not intended to be used with zprofile, but can be.
+
+# Login configs.
+setopt nullglob
+
+# all of our login zsh files
+typeset -U login_files
+login_files=($DOTFILES/**/login.zsh)
+
+# run all login files
+for file in ${login_files}; do
+    source "$file"
+done
+
+unset login_files
+unsetopt nullglob

zsh/zlogout.symlink

@@ -0,0 +1,14 @@
+# Logout configs.
+setopt nullglob
+
+# all of our logout zsh files
+typeset -U logout_files
+logout_files=($DOTFILES/**/logout.zsh)
+
+# run all logout files
+for file in ${logout_files}; do
+    source "$file"
+done
+
+unset logout_files
+unsetopt nullglob

zsh/zprofile.symlink

@@ -0,0 +1,16 @@
+# NOTE: Not intended to be used with zlogin, but can be.
+
+# Login profile configs.
+setopt nullglob
+
+# all of our profile zsh files
+typeset -U profile_files
+profile_files=($DOTFILES/**/profile.zsh)
+
+# run all profile files
+for file in ${profile_files}; do
+    source "$file"
+done
+
+unset profile_files
+unsetopt nullglob

zsh/zshenv.symlink

@@ -0,0 +1,26 @@
+# Environment configs.
+setopt nullglob
+
+# shortcut to this dotfiles path is $DOTFILES
+export DOTFILES="$HOME/.dotfiles"
+
+# your project folder that we can `c [tab]` to
+export PROJECTS="$HOME/Code"
+
+# path and env zsh files
+typeset -U path_files env_files
+path_files=($DOTFILES/**/path.zsh)
+env_files=($DOTFILES/**/env.zsh)
+
+# load the path files
+for file in ${path_files}; do
+  source "$file"
+done
+
+# load the env files
+for file in ${env_files}; do
+  source "$file"
+done
+
+unset path_files env_files
+unsetopt nullglob

zsh/zshrc.symlink

@@ -1,8 +1,5 @@
-# shortcut to this dotfiles path is $DOTFILES
-export DOTFILES=$HOME/.dotfiles
-
-# your project folder that we can `c [tab]` to
-export PROJECTS=~/Code
+# Interactive environment configs.
+setopt nullglob extendedglob
 
 # Stash your environment variables in ~/.localrc. This means they'll stay out
 # of your main dotfiles repository (which may be public, like this one), but
@@ -12,30 +9,24 @@ then
   source ~/.localrc
 fi
 
-# all of our zsh files
-typeset -U config_files
-config_files=($DOTFILES/**/*.zsh)
-
-# load the path files
-for file in ${(M)config_files:#*/path.zsh}
-do
-  source $file
-done
+# all of our non-path/env/profile/login/logout zsh files
+typeset -U interactive_files completion_files
+interactive_files=($DOTFILES/**/*.zsh~**/completion.zsh~**/path.zsh~**/env.zsh~**/profile.zsh~**/login.zsh~**/logout.zsh)
+completion_file=($DOTFILES/**/completion.zsh)
 
-# load everything but the path and completion files
-for file in ${${config_files:#*/path.zsh}:#*/completion.zsh}
-do
-  source $file
+# load interactive files (everything but the completion, path, env,
+# profile, login, and logout files)
+for file in ${interactive_files}; do
+  source "$file"
 done
 
 # initialize autocomplete here, otherwise functions won't be loaded
 autoload -U compinit
 compinit
 
 # load every completion after autocomplete loads
-for file in ${(M)config_files:#*/completion.zsh}
-do
-  source $file
+for file in ${completion_files}; do
+  source "$file"
 done
 
 unset config_files
@@ -47,4 +38,7 @@ autoload -U down-line-or-beginning-search
 zle -N up-line-or-beginning-search
 zle -N down-line-or-beginning-search
 bindkey "^[[A" up-line-or-beginning-search # Up
-bindkey "^[[B" down-line-or-beginning-search # Down
+bindkey "^[[B" down-line-or-beginning-search # Down
+
+unset interactive_files completion_files
+unsetopt nullglob extendedglob