Revert a change in CVS

http://stackoverflow.com/questions/435368/how-do-i-revert-a-big-change-in-cvs

mkdir code_base1 && cd code_base1  cvs co -D "2008-12-30" modulename  cvs tag code_base_2008_12_30  

Now do the join tag-based, subtracting all changes between now and 2008-12-30:

cd .. && mkdir code_base2 && cd code_base2  cvs co modulename  cvs update -d -j HEAD -j code_base_2008_12_30  # use -d to resurrect deleted directories  

Compare the contents of code_base1 and code_base2. They should be identical except for the CVS meta information. Finally commit the code as it was on 2008-12-30 as new HEAD:

cvs commit -m "Revert all changes this year"  

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Note that tagging the code you wish to join like this will not work, because rtag also does not handle removed files and directories correctly, when using -D: