Paul Burba wrote on Mon, Feb 06, 2012 at 18:15:11 -0500:
> Hi All,
> There has long been a desire for Subversion to support some form of
> inherited properties. Recently, while discussing a potential solution
> for server dictated configurations (see
> http://svn.haxx.se/dev/archive-2012-01/0032.shtml), the idea of using
> inheritable properties as an alternative approach was raised. To that
> end I put together an inherited properties design wiki, see
> Many of you have already seen this wiki and weighed in on the server
> dictated config thread, but in the event you haven't please check it
I'm in that camp --- the threads were too long for me so I only followed
them with one eye. Now that you called this RFC I reviewed the wiki
proposal and made some comments below.
> out. I'd like to move this forward or return to the original server
> dictated config, so any questions, concerns, and/or suggestions are
> greatly appreciated.
- There's no mention on the wiki of _how_ inherited properties can help
with server-dictated config. I realize it's probably somewhere in my
mailbox, but a pointer would be useful.
- How does all this interact with 1.7-and-older clients? For example,
if svn:inheritable:foo is set on ^/trunk and a 1.7 client propgets
this property on a descendant of ^/trunk that doesn't have that
property set, I presume that client would be told that that property
doesn't exist on the descendant?
- "# New reserved Subversion properties may be introduced that are
inheritable by definition, but such properties are not required to use
any special namespace, beyond the normal "svn:" prefix."
This implies a drawback: we add in 1.9 an svn:silver property and
declare it inheritable, then a 1.8 server won't recognize it as such.
- "# Unlike svn:mergeinfo and like tsvn:auto-props, inheritance across
mixed-revision boundaries in the working copy is allowed."
Does this hold even if the nodes on either side of the mixed-revision
boundary are not related? Like, for example, A/ and A/D/ at the end
of the following example? ---
% $svn rm -q A
% $svn ci -q -m r2
% $svn mkdir -q A
% $svn ci -q -m r3
% $svn mkdir -q A/D
% $svn ci -q -m r4
% cd A
% $svn up -r1 D
Updated to revision 1.
- "Whenever an update occurs the cache(s) will be refreshed."
Suppose svn:keywords were inheritable and an update changed the cached
svn:keywords value in the parent of the wcroot. Would it be easy to
rewrite all files to the new keywords they now inherit?
(I'm using svn:keywords as an illustration/example.)
- INHERITABLE_PROPS schema
Not a wc-ng expert, but would having a CONSTRAINT to the effect of
"Any (LOCAL_RELPATH, OP_DEPTH) tuple that appears in INHERITABLE_PROPS
must also appear (as a tuple) in NODES" be better than two FOREIGN KEY
And two minor points:
- "A target with no explicit mergeinfo might still inherit a property
from a parent:"
How does mergeinfo factor in? (Typo?)
- Nitpick: svn_proplist_receiver2_t's docstring should use 'const char *'
for the types of hash keys.
Received on 2012-02-07 01:21:11 CET