I might as well mention bk-7.2ce which is the first open-source release.
Release notes relative to bk-7.1
Release notes for BitKeeper version 7.2ce released May 9 2016 This is the first open source release of BitKeeper. Many changes involve removing the licensing code. Changes: Upgraded TCL/Tk to v8.6 which improved appearance on MacOS. BitKeeper now uses gfile pathnames in many places where sfile pathnames were used in the past. The biggest change is that 'bk -r' returns dir/file instead of dir/SCCS/s.file. Also many error messages avoid printing SCCS/s.file pathnames since those are confusing. The code now uses PCRE for regex code everywhere. This mainly changes 'bk changes -/regex/' and 'bk log -/regex/'. Removed old commands: bk _eula bk lease bk legal bk more bk status --compat bk users Several performance issues related to repositories containing abnormally large numbers of tags have been fixed. The BK/Web service has been given significant improvements to upgrade the appearance from 1998 web standards. ;-) Changes in individual commands bk changes New --lattice && --longest options to change selections based on the input range. New --json option to format output for web apps bk delta if the last line has no newline at the end and has carriage returns, they will now be stripped. If no data is left, then the line is ignored. The -D option is now limited to RCS diffs. RCS diffs used to not recognize no newline diffs. They are recognized now. bk describe New command to give a friendly name for the current cset like bk-7.1+183@0x56d9f3c0 (last tag + # of csets since @ time_t of tip) # Show the tip (and any other csets with that time stamp) bk changes -c0x56d9f3c0 bk diffs -h no longer prints a blank first line. bk fast-export Add --standalone mode for exporting single components from a nested collection. Add support for incremental exports to allow a git repository to track a bk master. bk rmgone Rmgone was completely rewritten and removed a number of bugs and shortcomings. The new code is nested aware, has a more understandable output, and won't incorrectly remove some files. bk makepatch Makepatch now ONLY generates the bk-5.0 fastpatch format and later. This breaks pull/push compatibility with bk-4.x, but old repositories can still be cloned and read. bk clone --upgrade is your friend. bk upgrade Now downloads new versions from the www.bitkeeper.org/downloads area. This is also used to find the latest release as mentioned by 'bk version'. Bugs fixed: Fixed 'bk citool' support for pre-delta triggers. The old behavior was terrible. (sorry) 'bk changes -R URL' with a bad URL could coredump. Fixed. 'bk chmod' could coredump when run outside a repository.