code2pot allows you to extract yout gettext sensible strings into a pot file

code2pot.sh

#!/bin/sh

# Copyright (c) 2012, Daniel Ripoll
# All rights reserved.
#
#  Redistribution and use in source and binary forms, with or without
#  modification, are permitted provided that the following conditions are
#  met:
#  
#  * Redistributions of source code must retain the above copyright
#    notice, this list of conditions and the following disclaimer.
#  * Redistributions in binary form must reproduce the above
#    copyright notice, this list of conditions and the following disclaimer
#    in the documentation and/or other materials provided with the
#    distribution.
#  * Neither the name of the  nor the names of its
#    contributors may be used to endorse or promote products derived from
#    this software without specific prior written permission.
#  
#  THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
#  "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
#  LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
#  A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
#  OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
#  SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
#  LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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#  (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
#  OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
#  

CODEVERSION="0.2"
if [[ ($# -eq 0)  ]]
    then
    	echo "code2pot $CODEVERSION"
        echo "You have not selected any file."
        echo "Type -h or --help for help."
        exit 1
fi   

function print_verbose () {
    # Detect if runing in verbose and print the message
	if [[ $1 == "yes" ]]; then
		echo $2
	fi
}
function extract_strings (){
    # Extract the translatable strings into a common .pot file
    nameitem="$1"
    currentname="$2"
    extensionname="$3"
    verbose="$4"
    directory=`pwd`
    if [[ -f "$directory/messages.pot" ]]; then
		print_verbose $verbose "Using file messages.pot"
	else
		print_verbose $verbose "no existe"
		echo ''>"$directory/messages.pot"
	fi
    if [[ $extensionname == "ui" ]]; then
        print_verbose $verbose "A QT-UI file ($itemname) has been detected, converting to a temporal string-extractable file  $currentname.h"
        uic-qt4 -tr _ $currentname.ui -o $currentname.h
        xgettext $currentname.h -j -o messages.pot --from-code=UTF-8 --keyword=_
        print_verbose $verbose "Extracting strings from temporal file to messages.pot"
        rm $currentname.h
        print_verbose $verbose "Deleting temporal file $currentname.h"
    else
        xgettext $nameitem -j -o messages.pot --from-code=UTF-8 --keyword=_
        print_verbose $verbose "Extracting strings from $nameitem to messages.pot"
    fi
}
function checkextract () {
    # Check if you have typed an extractable file
	if [[ -f $1 ]]; then
		extract_strings "$itemname" "$filename" "$extension" "$2"
	else
		echo "$item is not a valid file"
	fi
}

function print_version() {
    # Print version of the program
	echo "code2pot $CODEVERSION"
	echo 'Created for BulmaGés project.'
	echo 'Checkout http://bulmages.es or http://danielripoll.es for more info.'
	exit 0
}
function print_license() {
    # Print license
	echo "code2pot $CODEVERSION"
	echo 'Created for BulmaGés project.'
	echo 'This script is licensed under New BSD License.'
	exit 0
}
function print_help() {
    # Print help
	echo "code2pot $CODEVERSION"
	echo '-l/--license for see the license of the program'
	echo '-v/--version for see the version of the program'
	echo '-vb/--show in verbose mode'
	echo '-h/--help show this help'
	exit 0
}
# Read the options
toread=$1
case $toread in
	"-v") 
		print_version;;
	"--version") 
		print_version;;
	"-l")
		print_license;;
	"--license")
		print_license;;
	"-h")
		print_help;;
	"--help")
		print_help;;
	"-vb")
		echo 'Verbose mode activated'
		isverbose="yes";;
	"--verbose")
		echo 'Verbose mode activated'
		isverbose="yes";;
	*)
		isverbose="no"
esac

for item in $*;do
    # Extract every item in the argument line
    itemname=$item
    extension="${itemname##*.}"
    filename="${itemname%.*}"
    if [[ ($item == "-vb") || ($item == "--verbose" ) ]]; then
		echo "code2pot $CODEVERSION"
	else
		checkextract "$item" "$isverbose"
    fi
done
exit 0