Securely encrypted ZIPs right from contextual menu in Mac OS

Run the following simple oneliner to download and "install" the service:

curl -L https://dl.dropbox.com/s/wpxbnm8y6gb6l32/compressWithPassword.tar.gz | tar zx -C ~/Library/Services/

And while selecting files or folders in Finder you will find the new option

Services > Compress with password

Note: as of today will only work with one file or directory at a time.

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Implementation details

Check passwordWithExpect.sh to see the script that this service runs.

Nothice that I didn't use zip's --password parameter that would entail the dangers of command logging. Instead, I used expect to pass the password directly to the zip function. Given that Automator services do not support expect scripts, I had to wrap it on a bash script. For the curious minds, -f - defines that expect will be using standard input. Then the following "$@ allows to send the function parameters to expect that will be extracted with [lindex $argv <number>]. Other than that you know what << means, and everything between ! will be the input sent to expect. Awesome, right?