c-archiver

#!/bin/bash

# FUNCTIONS
print(){
	echo ":: $@" 1>&2
}

pass(){
	echo > /dev/null
}

get_first_char(){
        echo $1 | sed 's/\(.\).*/\1/'
}

abspath(){
        if [ ! "`get_first_char $1`" = "/" ]; then
                echo "`pwd`/$1"
        else
                echo $1
        fi
}

car_extract_objects_from_dep(){
	local file=`abspath ${1}`
	if [ -e "$file" ]; then
		cd ${OUTPUT_DIR}
		ar x ${file}
		cd - > /dev/null
	else
		print "Not found: $file. Skipping."
	fi
}

car_copy_object_to_output_dir(){
	local file="$1"
	if [ -e "$file" ]; then
		cp $1 $OUTPUT_DIR
	else
		print "Not found: $file. Skipping."
	fi
}

car_create_library_from_objects(){
	rm -f ${OUTPUT_FILE}
	cd ${OUTPUT_DIR}
	ar rcs "${OUTPUT_FILE}" *.o
	cd - > /dev/null
	print "Created ${OUTPUT_FILE}"
}

car_create_output_dir_if_not_exists(){
	if [ ! -d "${OUTPUT_DIR}" ]; then
		print "Creating ${OUTPUT_DIR}"
		mkdir -p "${OUTPUT_DIR}"
	fi
}

# VARIABLES
OUTPUT_DIR=${OUTPUT_DIR:-output}/c-archive
OUTPUT_FILE=`abspath $1`

# PARAM CHECK
if [ "$#" -lt "2" ]; then
	print "Usage: ${0} <output.a> <input1.[ao]> ... <inputN.[ao]>"
	exit 1
fi

# MAIN
car_create_output_dir_if_not_exists

for param in $@; do
case $param in
	$1) pass ;;
	*.a) car_extract_objects_from_dep $param ;;
	*.o) car_copy_object_to_output_dir $param ;;
esac
done

car_create_library_from_objects