Here it is spread out: 

while (<>) {
    s+${SOURCE}/${SAMS}/++g;
    s+${SOURCE}/${SAMLIB}/++g;
    s+${SOURCE}/${SMCLIB}/+${SOURCE}/${KENO}/+g;
    if ( not m+^${SOURCE}/+ ) {
         s+${SOURCE}/+\$$\{OBJECT\}/+g;
         print
    }
}

[download]

This is run on a file named ".depend", and then something else runs after that.

I'm guessing that ${SOURCE} and friends are being interpolated somehow (even though they're in single quotes) because there's nothing in the Perl to give those variables values.

Anyway, this is using "+" instead of "/" for the delimiters on s///, probably so that it can put a literal slash in there without having to backslash it. What it does (for each line) is something like:

  1. Remove "${SOURCE}/${SAMS}/" and "${SOURCE}/${SAMLIB}/" anywhere in the line.
  2. Replace every "${SOURCE}/${SMCLIB}/" with "${SOURCE}/${KENO}/"
  3. If the line starts with "${SOURCE}/", replace every "${SOURCE}" with a literal "${OBJECT}" (I think), and print the line.
  4. (Lines that don't start with "${SOURCE}/" are not printed and so removed.)

In reply to Re: Command line question by kyle
in thread Command line question by igotlongestname

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