I'd like to make an action execute or not depending on whether a specific line is present in an already-present text file, but I'm not sure even where to begin.
Here are the details:
Prior to installation, I check for the presence of an INI file in a specific location. If it is missing, the installer exits.
At install time, I'd like to check if there are 4 specific lines in the INI file. If the lines are there, then move on. If not, add the 4 lines. Adding the lines is not the problem; checking to see whether they already exist is the problem. Any ideas?
For the existence of the file you've got a built-in condition...
For the line existence you might want to turn to local resources: for instance under Windows you've got the built-in FINDSTR command and on Unices the good ol' grep...
