List of all users who committed to a SVN repository

While I started rewriting my python parsing, I realized a much better way to do what you asked (I parsed names and dates of submission to calculate weekend/weekday submission ratios to see who had no life!)

Check out the repo, then go to it and execute:

svn log | grep '^r[0-9]' | awk '{print $3}' | sort | uniq

That gets a list of all the changes that have been commited, greps for the lines that start with the revision and number (r[12341] | author | date-and-stuff... ), prints out the third field (author), sorts the authors and gets rid of duplicates.

Light form of @DrummerB answer for usernames with spaces, combined with simplicity of @vgm64

svn log -q | gawk -F "|" '/^r[0-9]/ { print $2 }' | sort -u

vgm64's answer is good, but it doesn't work well with names that contain spaces. I changed it, so it does:

svn log | grep '^r\do*' | sed 's_^r[0-9]* | \([^|]*\) | .*$_\1_g' | sort | uniq