Best way to parse this particular string using awk / sed?
- by Jack
Hi, I need to get a particular version string from a file (call it version.lst) and use it to compare another in a shell script. For example sake, the file contains lines that look like this:
V1.000 -- build date and other info here -- APP1
V1.000 -- build date and other info here -- APP2
V1.500 -- build date and other info here -- APP3
.. and so on. Let's say I am trying to grab the first version (in this case, V1.000) from APP1. Obviously, the versions can change and I want this to be dynamic. What I have right now works:
var = `cat version.lst | grep " -- APP1" | grep -Eo V[0-9].[0-9]{3}`
Pipe to grep will get the line containing APP1 and the second pipe to grep will get the version string. However, I hear grep is not the way to do this so I'd like to learn the best way using awk or sed. Any ideas? I am new to both and haven't found a tutorial easy enough to learn the syntax of it. Do they support egrep? Thanks!
