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Full Discussion: Compare two files containing package names and version number
Top Forums Shell Programming and Scripting Compare two files containing package names and version number Post 302906668 by Chubler_XL on Sunday 22nd of June 2014 07:21:19 PM
Old 06-22-2014
How about this solution, files system_1 and system_2 contain output of rpm -qa like this:

Code:
$ head -3 system_1
gnome-vfs2-smb-2.24.2-6.el6.x86_64
perl-XML-Parser-2.36-7.el6.x86_64
gnome-python2-desktop-2.28.0-5.el6.x86_64

$ head -3 system_2
hplip-libs-3.13.11-4.fc20.x86_64
gnu-free-fonts-common-20120503-8.fc20.noarch
GConf2-3.2.6-7.fc20.x86_64

In the below script specify the following in OPTS:

Code:
A - Package is Additional in file1
M - Package is Missing in file1
N - Version is Newer in file1
O - Version is Older in file1
S - Version is the Same in file1 and file2
D - Debug print version numbers with package names

And here is your code (options used here are Debug plus Newer and Additional in file1):

Code:
awk -v OPT=DNA '
FNR==1{sys++}
{
   match($0,"-[0-9]")
   pkg=substr($0,1,RSTART-1)
   ver=substr($0,RSTART+1)
   if (sys==1) {
      PKGS[pkg]=ver
      next
   }
   if(!(pkg in PKGS)) {
      if(index(OPT, "M")) print "M:" pkg (index(OPT, "D") ? "(" ver ")":"")
      next
   }
   if (index(OPT, "D")) debug="(" PKGS[pkg] " vrs " ver ")"
   if (index(OPT, "N") && PKGS[pkg] > ver) print "N:" pkg debug
   if (index(OPT, "O") && PKGS[pkg] < ver) print "O:" pkg debug
   if (index(OPT, "S") && PKGS[pkg] == ver) print "S:" pkg debug
   delete PKGS[pkg]
}
END {
   if (index(OPT, "A")) for(pkg in PKGS) print "A:" pkg (index(OPT, "D") ? "(" PKGS[pkg] ")":"")
}' system_1 system_2

Output is <Type>:<package> , where <Type> is single letter from "NOMAS" and <package> is package name plus optional debug info.
 

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LEARN ABOUT DEBIAN

packagens

pkg::create(3tcl)					       Tcl Built-In Commands						 pkg::create(3tcl)

__________________________________________________________________________________________________________________________________________________

NAME

       pkg::create - Construct an appropriate 'package ifneeded' command for a given package specification

SYNOPSIS

       ::pkg::create -name packageName -version packageVersion ?-load filespec? ... ?-source filespec? ...
_________________________________________________________________

DESCRIPTION

       ::pkg::create  is  a utility procedure that is part of the standard Tcl library.  It is used to create an appropriate package ifneeded com-
       mand for a given package specification.	It can be used to construct a pkgIndex.tcl file for use with the package mechanism.

OPTIONS

       The parameters supported are:

       -name packageName
	      This parameter specifies the name of the package.  It is required.

       -version packageVersion
	      This parameter specifies the version of the package.  It is required.

       -load filespec
	      This parameter specifies a binary library that must be loaded with the load command.  filespec is a list	with  two  elements.   The
	      first  element  is  the name of the file to load.  The second, optional element is a list of commands supplied by loading that file.
	      If the list of procedures is empty or omitted, ::pkg::create will set up the library for direct loading (see pkg_mkIndex).  Any num-
	      ber of -load parameters may be specified.

       -source filespec
	      This  parameter  is  similar to the -load parameter, except that it specifies a Tcl library that must be loaded with the source com-
	      mand.  Any number of -source parameters may be specified.

       At least one -load or -source parameter must be given.

SEE ALSO

       package(3tcl)

KEYWORDS

       auto-load, index, package, version

Tcl									8.3							 pkg::create(3tcl)
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