Extracting Dependencies of a deb package which is not a part of DPKG system

[Tech Geek <techgeek12345@gmail.com>]

So I downloaded the opera browser deb file - opera_10.10.4742.gcc4.qt3_i386.deb. What I am trying to do is first find out what all packages does this deb file depends on and then install those packages first (using apt-get) and then finally install this deb file (using dpkg -i opera_10.10.4742.gcc4.qt3_i386.deb).

Now on giving the command:

dpkg --info opera_10.10.4742.gcc4.qt3_i386.deb | grep Depends[

I get the following output:

Depends: libc6 (>= 2.1.3), xlib6g (>= 3.3.6) | xlibs | libxmu6, debconf (>= 0.5) | debconf-2.0, libqt3-mt (>= 3.3.4), libstdc++6

Now my question is what is the best way I can extract/list just the names of the above packages (using awk, sed?) so that I feed the list to apt-get to first install them and then run dpkg -i opera*

 

I know an apt-get -f install after the first attempt to install it would take care of this but I am trying to automate this installation process through a script also keeping in mind that the dependencies of opera package might change in the future.

 

Alternatively, if anyone can suggest a better method on how to achieve that would be great.

 

Thanks,

 

Tech Geek