Convert a site installed via FTP to now use SVN
Context: you are taking over a Tiki site which was installed by FTP, and you now want to use SVN for easy future upgrades. You may also have some modified files, and via FTP, it's time consuming to manage this.
This assumes you are familiar with Get code.
This example is to upgrade from 6.4 (which is tagged as such in SVN) to the latest code of branches/6.x
Checkout the same version as your current Tiki install
svn co https://tikiwiki.svn.sourceforge.net/svnroot/tikiwiki/tags/6.4/ .
Copy you old site over the new install
When you did the checkout, SVN actually made two copies of each file. One as a working copy and one as a reference. ex.: /changelog.txt and /.svn/text-base/changelog.txt.svn-base This is very useful to make rapid diffs.
So as you copy your old site over the new install, if there are any modified or new files, they will override the ones of your checkout (the working copy but not the reference files in .svn/ folders)
Check for differences
svn st svn diff
Then, you can update normally
SVN will manage merges of modified files. See Update.

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