On Wed, Nov 26, 2014 at 7:53 AM, Richard Hipp <d...@sqlite.org> wrote: > The checkin at > https://www.fossil-scm.org/fossil/info/f36ac49ddcf8d48c32494026ba0ee52c9891e6df > shows a proposed schema change in Fossil, which if moved to trunk would > require everybody to run "fossil rebuild all". > > It has been over three years since we have required a "fossil rebuild" on > update. I'm a little concerned that this change might be too disruptive. > > Furthermore, the change is not strictly necessary. The change adds a new > field to the PLINK table that is used for error checking only. The new > PLINK.BASEID field points to the baseline manifest for a delta manifest. > The field is always NULL for manifests that are not deltas, which is the > usual case for most repositories. > > The new field is used to ensure that one does not "purge" a baseline > manifest without also purging all its deltas, since to do otherwise would > render the deltas unusable. It should be impossible to do that because the > purge command removes a checkin and all its descendents and all deltas of a > baseline manifest must be decendants of the baseline. But it feels nice to > have that extra check in place, just as an added safety measure. In a > version control system, it is VERY important that errors and/or bugs not > destroy history. The schema change simply adds another layer of defense to > make sure that never happens. > > QUESTION: > > So should I go forward with the schema change and make everybody run "fossil > rebuild all" for the first time in recent memory? Or am I being excessively > paranoid?
I am in favor of the change for an additional layer of validation, and am willing to put up with a 'rebuild all'. -- Andreas Kupries Senior Tcl Developer Code to Cloud: Smarter, Safer, Faster™ F: 778.786.1133 andre...@activestate.com, http://www.activestate.com Learn about Stackato for Private PaaS: http://www.activestate.com/stackato _______________________________________________ fossil-dev mailing list fossil-dev@lists.fossil-scm.org http://sqlite.org:8080/cgi-bin/mailman/listinfo/fossil-dev
