[zsh] Fix path setup

- Add setup-path function that allows resetting the path at any time.
- macOS does a dumb thing where it resets your path with some helper binary in
  /etc/zprofile. Disable GLOBAL_RCS in .zshenv so it doesn't read system init
  files.

env

@@ -40,14 +40,24 @@ function append-to-path
     fi
 }
 
-path=("/usr/local/bin" "/usr/bin" "/bin" "/usr/local/sbin" "/usr/sbin" "/sbin")
-prepend-to-path "/usr/X11/bin"
-prepend-to-path "/opt/local/bin"
-prepend-to-path "$HOME/.local/bin"
-prepend-to-path "$HOME/.gem/ruby/2.2.0/bin"
-prepend-to-path "$HOME/.cargo/bin"
-prepend-to-path "$HOME/bin"
-export path
+function setup-path
+{
+    export path=()
+    append-to-path "/usr/local/bin"
+    append-to-path "/usr/bin"
+    append-to-path "/bin"
+    append-to-path "/usr/local/sbin"
+    append-to-path "/usr/sbin"
+    append-to-path "/sbin"
+    prepend-to-path "/usr/X11/bin"
+    prepend-to-path "/opt/local/bin"
+    prepend-to-path "$HOME/.local/bin"
+    prepend-to-path "$HOME/.gem/ruby/2.2.0/bin"
+    prepend-to-path "$HOME/.cargo/bin"
+    prepend-to-path "$HOME/bin"
+}
+
+setup-path
 
 if which virtualenvwrapper.sh 1>/dev/null 2>&1; then
     export WORKON_HOME="$HOME/src/py/.envs"

zshenv

@@ -5,6 +5,9 @@
 #
 # Eryn Wells <eryn@erynwells.me>
 
+# Don't read global startup. It messes things up...
+unsetopt GLOBAL_RCS
+
 [ -e $HOME/.env ] && source $HOME/.env
 
 # System specific environment settings