UPDATE: http://technicalmusings.blogspot.com/2013/01/osx-ssh-session-coloring-redux.html
If you're like me, you work in many different computing environments: home, test, QA, and production. And it's REALLY important not to get them mixed up. I've always used a color scheme in my ssh/console windows to help me differentiate each. I've manually set the color of each console before I log in, and try not to reuse a console for different environments. It's kind of a pain, and if I'm brain dead enough to not notice what host I'm logged into, chances are high that I'm not going to set the colors correctly either. So I created an OSX (I'm on 10.7) AppleScript to automatically change the Terminal colors for each of my windows/tabs to match the environment that console is logged into.
To trigger the AppleScript, I added it to an until-now-unknown to me ssh client setting: LocalCommand. It will run a command locally each time you make an ssh connection.
To setup the trigger, you must add the following lines into ~/.ssh/config:
(Note: it's important to add the & at the end of LocalCommand to put the command in background so it can wait for Terminal to connect)
Host *
PermitLocalCommand yes
LocalCommand /Users/MYNAME/applescript/term_tab_style.scpt &
UPDATE:
And this in /etc/ssh_config:
PermitLocalCommand yes
The AppleScript goes through all open Terminal windows/tabs and checks the title. This is normally set to the user@hostname, and I have a naming convention 'purpose'-'env'-'location'-'number'. Applescript has very limited parsing capabilites; I found the functions I used
here to split the hostname up and get the environment name. You can then set the Terminal window/tab to whatever Profile you desire.
The code for term_tab_style.scpt. Copy this code into wherever you specified the LocalCommand in ~/.ssh/config and don't forget to run 'chmod u+x ~/term_tab_style.scpt'.
#!/usr/bin/osascript
on run argv
delay 1
tell application "Terminal"
repeat with w from 1 to count windows
repeat with t from 1 to count tabs of window w
set title to custom title of tab t of window w
try
set myArray to my theSplit(title, "@")
set userName to my getArrayValue(myArray, 1)
set restName to my getArrayValue(myArray, 2)
set myArray to my theSplit(restName, "-")
set envName to my getArrayValue(myArray, 2)
if envName is "pro" then
#display dialog ("" & envName)
set current settings of tab t of window w to (first settings set whose name is "Basic Blue")
else if envName is "qa" then
set current settings of tab t of window w to (first settings set whose name is "Basic")
end if
end try
end repeat
end repeat
end tell
end run
on theSplit(theString, theDelimiter)
-- save delimiters to restore old settings
set oldDelimiters to AppleScript's text item delimiters
-- set delimiters to delimiter to be used
set AppleScript's text item delimiters to theDelimiter
-- create the array
set theArray to every text item of theString
-- restore the old setting
set AppleScript's text item delimiters to oldDelimiters
-- return the result
return theArray
end theSplit
on getArrayValue(array, location)
-- very important -- The list index starts at 1 not 0
return item location in array
end getArrayValue
