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|
#!/bin/bash
ROOTDIR="${HOME}/.w3watch"
CACHEDIR="${ROOTDIR}/cache"
LOCKFILE="${ROOTDIR}/lock"
CONFIGFILE="${ROOTDIR}/config"
CONFIGSAMPLE='/usr/share/doc/w3watch/config.sample'
if [ ! -d "${ROOTDIR}" ]; then
install -D "${CONFIGSAMPLE}" "${CONFIGFILE}"
mkdir -p "${CACHEDIR}"
eval "${EDITOR} ${CONFIGFILE}"
exit $?
fi
if [ ! -r "${CONFIGFILE}" ]; then
echo "${CONFIGFILE} not found!"
exit 1
fi
if [ ! -d "${CACHEDIR}" ]; then
mkdir -p "${CACHEDIR}"
fi
if [ -r "${LOCKFILE}" ]; then
echo "w3watch is locked by ${LOCKFILE}"
exit 1
fi
if [ "${1}" == "e" ]; then
eval "${EDITOR} ${CONFIGFILE}"
exit $?
fi
if [ "${1}" == "l" ]; then
cat "${CONFIGFILE}"
exit $?
fi
if [ "${1}" == "d" ]; then
DUMP=true
else
DUMP=false
if [ "${1}" != "c" ]; then
echo "Usage: ${0} [e|l|d|c]"
echo -e "\te:\tedit config"
echo -e "\tl:\tlist config"
echo -e "\td:\tdump output and discard any changes"
echo -e "\tc:\tcheck for updates"
exit -1
fi
fi
touch "${LOCKFILE}"
while read line; do
if echo "${line}" | grep -q -v '^#'; then
data=(${line})
url="${data[0]}"
filter="${data[@]:1}"
if echo "$url}" | grep -q '^@'; then
url="$(echo "${url}" | cut -c 1 --complement -)"
dump=$(lynx -source "$url")
else
dump=$(lynx -dump "$url")
fi
if [ $? -ne 0 ]; then
rm -f "${LOCKFILE}"
exit 1
fi
if [ "${filter}" != "" ]; then
dump=$(echo "${dump}" | eval "${filter}")
fi
if $DUMP; then
echo "$dump"
else
sum=$(echo "${line}" | sha1sum | awk '{print $1;}')
cachefile="${CACHEDIR}/${sum}"
if [ -f "$cachefile" ]; then
echo "$dump" | diff -u \
--label "local copy from $(/usr/bin/stat --printf='%y' ${cachefile})" "$cachefile" \
--label "${url}" - \
|| echo
fi
echo "$dump" > "$cachefile"
fi
fi
done < "${CONFIGFILE}"
# remove old cache entries
for cacheEntry in "${CACHEDIR}/"*; do
cacheSum=$(basename "$cacheEntry")
while read configEntry; do
if echo "${configEntry}" | grep -q -v '^#'; then
configSum=$(echo "$configEntry" | sha1sum | awk '{print $1;}')
if [ "$cacheSum" == "$configSum" ]; then
continue 2
fi
fi
done < "${CONFIGFILE}"
rm -f $cacheEntry
done
rm -f touch "${LOCKFILE}"
|
