little-things/wpull2-url-origin

#!/bin/bash
# Usage: wpull2-url-origin [FILENAME] URL
#  FILENAME defaults to wpull.db
# Trace back where a URL was discovered, all the way back to the root
if [[ $# -eq 2 ]]
then
	filename="$1"
	shift
else
	filename=wpull.db
fi
if [[ ! -f "${filename}" ]]
then
	echo "Error: ${filename} does not exist or is not a regular file" >&2
	exit 1
fi
url="$1"
curId=$(sqlite3 "${filename}" 'SELECT id FROM url_strings WHERE url = "'"${url}"'"')
if [[ -z "${curId}" ]]
then
	echo "Error: ${url} not found" >&2
	exit 1
fi
while :
do
	sqlite3 "${filename}" 'SELECT queued_urls.*, url_strings.* FROM queued_urls JOIN url_strings ON queued_urls.url_string_id = url_strings.id WHERE url_strings.id = '${curId}
	IFS='|' read -r curId level < <(sqlite3 "${filename}" 'SELECT parent_url_string_id, level FROM queued_urls WHERE url_string_id = '${curId})
	if [[ ${level} -eq 0 ]]
	then
		break
	fi
done