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#!/usr/bin/perl
#-----------------------------------------------------------------------------
#	$Id: odffilesearch 0.007 2008-05-04$
#-----------------------------------------------------------------------------

=head1	NAME

	odffilesearch - File selection by keywords

=head1	SYNOPSIS

	odffilesearch -R "D:\Documents\*.odt" openoffice desktop XML
	
	produces the list of the ODF Text documents present in the given
	directory and its subdirectories, and containing the words
	"openoffice", "desktop" AND "XML"
	
	odffilesearch -command "rm -f %f" "*.ods *.odt" lost dismiss cancel

	executes the "rm -f filename" (i.e. deletes the file in a Unix system)
	for each ODT or ODS file present in the current directory
	and containing the words "lost", "dismiss" AND "cancel"

=head1	USAGE

	odffilesearch [-options] <file filter> <keyword list>

=head1	DESCRIPTION

	This utility allows the user to retrieve a list of files matching
	a given set of keywords or regular expressions. A file is selected
	when it contains, in its text and/or in its metadata (title, subject,
	keywords or description), all the given search strings.

	The selected files are echoed to the standard output (one file per
	line), so this utility can be used as a filter piping its results
	to another program. Alternatively, a given shell command can be
	launched by the script each time a file matches, allowing on-the-fly
	processing of the selected documents.

	The files filter may content one or more space-separated paths.
	Each path may content jokers. So it's possible to explore several
	directories and/or several filename patterns. 

	All the arguments after the file filter are processed as search
	criteria.

=head1	OPTIONS

	-R -recursive
		include the subdirectories of each given search directory
	-verbose -trace -debug
		echo some processing comments
	-warnings
		activate the warning messages of the OpenOffice::OODoc API
	-log <file>
		like -verbose, but then messages are sent to the given file
		and don't pollute the standard output
	-result <file>
	-output <file>
		send the list of matching files to the given file and not
		to the standard output
	-criteria <file>
		get search criteria from a file (one per line); the loaded
		search keywords may be combined with additional criteria
		passed with the command line, if any.
	-command <command> -exec <command>
		execute a shell command for each matching file ; if the
		command string contains "%f", this substring is replaced
		with the name of the selected file ; if this option is
		provided, the selection list is not echoed to the standard
		output ; if -verbose is on, the value returned by the
		command is echoed
	-encoding <encoding>
		selects the user's character set ; this option is mandatory
		if one or more search criteria contain characters not