rivet-namespace branch development status

[Massimo Manghi <ma...@unipr.it>]

Dear Rivetters

In my spare time I resumed the development for branch rivet-namespace. 
The test suite is being readjusted to account for the scoping of 
commands in the ::rivet namespace. I plan to add a few more tests and 
review others for this purpose.

configure.ac accepts now a new --disable-namespace-export switch that 
prevents mod_rivet from exporting the command set from ::rivet, thus 
forcing a programmer to specify the FQ names (or alias the same commands 
in the global namespace if they want to insist with their bad habits). 
Default for this macro is to export the ::rivet namespace so that 
existing applications can run by adding a

RivetServerConf ChildInitScript "namespace import -force ::rivet::*"

commands formerly provided by the 'Rivet' namespace (as documented in 
http://tcl.apache.org/rivet/manual/unescape_string.html) are now 
provided by the 'rivetlib' package. Package 'Rivet' will be a null 
package to keep compatibility. Analyzing in more detail the whole 
business of name spaces and packages used in Rivet it turned out there 
is much overlapping and interference between names, so I tentatively 
tried to imagine names that could be telltale of their role.

'rivetlib' package is automatically required in mod_rivet, so no need to 
load it intentionally, but this constraints Rivet to be built with Tcl 
8.5.10+ or Tcl8.6b1+ because they fix bug #3216070 that crashed Apache 
child processes. Test on Tcl version will be added to configure.ac using 
the ax_compare_version.m4 macro, but TEA might provide its own macro for 
testing Tcl patchlevel. I'll check it out.

::incr0 was removed and it's now provided as an alias of ::incr

comments and suggestions welcome. I think I could reintegrate this 
branch before December, provided fixing the test suite won't reveal 
unexpected problems.

  -- Massimo

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