By Collins-Sussman B.
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Extra resources for Version control with Subversion 1.1
ROLDREV This is the file that was the BASE revision before you updated your working copy. That is, the file that you checked out before you made your latest edits. rNEWREV This is the file that your Subversion client just received from the server when you updated your working copy. This file corresponds to the HEAD revision of the repository. svn directory and NEWREV is the revision number of the repository HEAD. txt in the repository. Harry has just changed the file in his working copy and checked it in.
And Subversion lets you refer to these revisions by number, keyword, or date. Revision Numbers When you create a new Subversion repository, it begins its life at revision zero and each successive commit increases the revision number by one. txt Transmitting file data . Committed revision 3. If at any point in the future you want to refer to that revision (we'll see how and why we might want to do that later in this chapter), you can refer to it as “3”. Revision Keywords The Subversion client understands a number of revision keywords.
At first, it may not be entirely clear why this sort of flexibility is considered a feature, and not a liability. After completing a commit to the repository, the freshly committed files and directories are at a more recent working revision than the rest of the working copy. It looks like a bit of a mess. As demonstrated earlier, the working copy can always be brought to a single working revision by running svn update. Why would someone deliberately want a mixture of working revisions? Assuming your project is sufficiently complex, you'll discover that it's sometimes nice to forcibly “backdate” portions of your working copy to an earlier revision; you'll learn how to do that in Chapter 3.