[yocto] why does ref manual say that Git supports auto-updating "to a limited extent"?

[Robert P. J. Day]

  proofing ref manual and in section 7.7, Fetchers, one reads:

"One useful feature for certain Source Code Manager (SCM) fetchers is
the ability to "auto-update" when the upstream SCM changes version.
Since this ability requires certain functionality from the SCM, not
all systems support it. Currently Subversion, Bazaar and to a limited
extent, Git support the ability to "auto-update"."

  "to a limited extent"? can someone clarify those limits, compared to
what's supported by subversion or bazaar? thanks.

rday

-- 

========================================================================
Robert P. J. Day                                 Ottawa, Ontario, CANADA
                        http://crashcourse.ca

Twitter:                                       http://twitter.com/rpjday
LinkedIn:                               http://ca.linkedin.com/in/rpjday
========================================================================