[MacPorts] #22142: "port variants" line-wrapping breaks if terminal columns 0

[MacPorts]

#22142: "port variants" line-wrapping breaks if terminal columns 0
----------------------------------------------+-----------------------------
 Reporter:  jxh@…                             |       Owner:  macports-tickets@…                   
     Type:  defect                            |      Status:  new                                  
 Priority:  Low                               |   Milestone:                                       
Component:  base                              |     Version:  1.8.1                                
 Keywords:  columns wrap variants xterm stty  |        Port:                                       
----------------------------------------------+-----------------------------
 My xterms always start out with:
 {{{
 $ stty -a
 speed 38400 baud; 0 rows; 0 columns;
 }}}
 and this makes "ports variants dbus" (for instance) wrap its text as
 though one had actually set COLUMNS=0 in the environment:
 {{{
 $ /opt/local/bin/port variants dbus
 dbus has the variants:
    no_root: Run
             the
             DBUS
             daemon
             as
             MacPorts
             install
             user.
   [...]
 }}}
 There is some code that reads this through Pextlib and term_get_size, but
 it arguably shouldn't take a 0 result as quite real.  If it leaves
 env(COLUMNS) alone, wraplabel, called from action_variants, will do the
 right thing.

 The attached diff shows a suggested fix.

 This is Snow Leopard, Mac OS 10.6.

-- 
Ticket URL: <http://trac.macports.org/ticket/22142>
MacPorts <http://www.macports.org/>
Ports system for Mac OS