How does setup.exe cope with upgrading of already installed packages if there exist modification in installed files?

[Oleksandr Gavenko <gavenko at bifit dot com dot ua>]

How does setup.exe cope with upgrading of already installed packages if
there exist modification in installed files?

I customize HG templates under:

 /lib/python2.6/site-packages/mercurial/templates/gitweb/*

and would like preserve it when update happen.

And it will be good to be notified if conflict happen.

Also I try:

  $ cygcheck -c mercurial
  Cygwin Package Information
  Package              Version        Status
  mercurial            1.9.2-1        OK

when I try:

  $ mv 
/lib/python2.6/site-packages/mercurial/templates/gitweb/branches.tmpl 
/lib/python2.6/site-packages/mercurial/templates/gitweb/branches~.tmpl
  $ cygcheck -c mercurial
  Cygwin Package Information
  Package              Version        Status
  mercurial            1.9.2-1        Incomplete

So "cygcheck -c" does not provide ability to find modification to
package files.

Also I worry about modification in other config files in /etc
(like /etc/apache2/httpd.conf). Are they overwritten on package update?

How can I be notified about upgrade conflicts?

What for '/etc/defaults' hierarchy was used?


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