Hi Giuseppe,
You can use the "DPKG_MAINTSCRIPT_PACKAGE_REFCOUNT" variable in the
maintainer script to tell whether or not to purge the file - it requires
dpkg (>= 1.17.2)[1][2].
~Niels
[1]:
dpkg/1.17.2 changelog:
* Pass the package reference count (i.e. number of present instances)
to maintainer scripts via the new variable
DPKG_MAINTSCRIPT_PACKAGE_REFCOUNT.
Closes: #681370
[2] The commit adding the variable:
http://anonscm.debian.org/gitweb/?p=dpkg/dpkg.git;a=commitdiff;h=8fe6910ed0a87f1233fae933679373866183596f
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