Subversion
使い方 - svn prop*

 % svn propset svn:keywords Id hello.c
 property `svn:keywords' set on 'hello.c'
 % svn commit
 --This line, and those below, will be ignored--

 MM   hello.c
 Sending        hello.c
 Transmitting file data .
 Committed revision 9.

 static char rcsid[] = "$Id$";
                         ↓
 static char rcsid[] = "$Id: hello.c 9 2003-05-11 15:36:18Z ukai $";

 % svn proplist -v hello.c
 Properties on 'hello.c':
   svn:keywords : Id

 svn propdel		削除
 svn propedit	変更
 svn propget		取得