Add iTerm2 tab color plugin

Whenever you do SSH, iTerm2 tab changes color to custom one. It greatly helps figuring out what environment you are in.

Idea and code by Wade Simmons.
https://github.com/wadey/dotfiles/blob/master/zsh/iterm2.zsh

plugins/iterm2-tab-color/iterm2-tab-color.plugin.zsh

@@ -0,0 +1,43 @@
+# Written by Wade Simmons
+# https://github.com/wadey
+#
+# iTerm2 tab color commands
+# http://code.google.com/p/iterm2/wiki/ProprietaryEscapeCodes
+
+if [[ -n "$ITERM_SESSION_ID" ]]; then
+    tab-color() {
+        echo -ne "\033]6;1;bg;red;brightness;$1\a"
+        echo -ne "\033]6;1;bg;green;brightness;$2\a"
+        echo -ne "\033]6;1;bg;blue;brightness;$3\a"
+    }
+    tab-red() { tab-color 255 0 0 }
+    tab-green() { tab-color 0 255 0 }
+    tab-blue() { tab-color 0 0 255 }
+    tab-orange() { tab-color 255 128 0 }
+
+    tab-reset() { echo -ne "\033]6;1;bg;*;default\a" }
+
+    function iterm2_precmd() {
+        tab-reset
+    }
+
+    function iterm2_preexec() {
+        # Are we using SSH?
+        if [[ "$1" =~ "^ssh " ]]; then
+            # Display RED on any kind of prod(uction) servers
+            if [[ "$*" =~ "prod" ]]; then
+                tab-red
+            else
+                if [[ "$*" =~ "dev" ]]; then
+                    tab-green
+                else
+                    tab-orange
+                fi
+            fi
+        fi
+    }
+
+    autoload -U add-zsh-hook
+    add-zsh-hook precmd  iterm2_precmd
+    add-zsh-hook preexec iterm2_preexec
+fi