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Warning 20150507: Just noticed, that the sed-expression also filters identical “not empty” lines from you file! This is not what I wanted. So if you have code with array-initialisations which use the same lines or multiple consecutive calls of the same function, then be careful and check the result of the following command with diff!
Hint 20150508: take a look at this code-snippet. Just copy&paste&compile&run.
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Task to achieve is: remove the superfluous double or triple empty lines between functions. One empty line as separator is acceptable. Two are annoying ..
Workflow is: filter the original source-file and put it into a new file. Remove the old one and replace it.
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$ cat source.cpp | sed '$!N; /^\(.*\)\n\1$/!P; D' > source_tmp.cpp && rm source.cpp && mv source_tmp.cpp source.cpp |
Maybe I should put it into a shellscript which parses the given directory recursively and applies this to all *., *cpp, *.hpp ..
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