Re^3: How to know if two files (.c,.h,.cpp) are different content-wise ignoring the comments?

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Re^4: How to know if two files (.c,.h,.cpp) are different content-wise ignoring the comments? by iphone (Beadle) on Feb 13, 2011 at 08:38 UTC
I am trying to use diff tool but use the -I option to ignore lines that start with "File Name:".i am using the below regular expression,there is no syntax error but the diff tool still shows changes with line that starts with "File Name:".Any idea what is going wrong? `diff -I '[^\s*File\sName:]' file1 file2` [download]	[reply] [d/l]
Re^5: How to know if two files (.c,.h,.cpp) are different content-wise ignoring the comments? by roboticus (Chancellor) on Feb 13, 2011 at 13:25 UTC
iphone: If there are differences in comments, then it's likely that there will be differences in the whitespace as well, so tell diff to ignore blank lines and other forms of whitespace. I don't know what you're running on, but on my box here, I use the options: -E to ignore tab expansion -b to ignore changes in whitespace -w to ignore all whitespace -B to ignore blank lines Note: I've never experimented to see if I can get by with a subset of those flags, but I suspect I can. But it's easy, so I've never found it worth the time to find out. ...roboticus When your only tool is a hammer, all problems look like your thumb.	[reply]
Re^5: How to know if two files (.c,.h,.cpp) are different content-wise ignoring the comments? by Corion (Patriarch) on Feb 13, 2011 at 08:49 UTC
Where does Perl come into play here?	[reply]