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-rwxr-xr-xw3watch156
1 files changed, 83 insertions, 73 deletions
diff --git a/w3watch b/w3watch
index 6abc305..c310253 100755
--- a/w3watch
+++ b/w3watch
@@ -1,17 +1,15 @@
#!/bin/bash
+DRYRUN=false
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
@@ -28,90 +26,102 @@ if [ -r "${LOCKFILE}" ]; then
exit 1
fi
-if [ "${1}" == "e" ]; then
- eval "${EDITOR} ${CONFIGFILE}"
- exit $?
-fi
+touch "${LOCKFILE}"
-if [ "${1}" == "l" ]; then
- cat "${CONFIGFILE}"
- exit $?
-fi
-if [ "${1}" == "d" ]; then
- DUMP=true
-else
- DUMP=false
-
- if [ "${1}" != "c" ]; then
- echo "Usage: ${0} [e|l|d|c]"
- echo -e "\te:\tedit config"
- echo -e "\tl:\tlist config"
- echo -e "\td:\tdump output and discard any changes"
- echo -e "\tc:\tcheck for updates"
- exit -1
- fi
-fi
+quit() {
+ rm -f "${LOCKFILE}"
+ exit $1
+}
+
+usage() {
+ echo "usage: ${0} [option]"
+ echo 'options:'
+ echo ' -e edit config'
+ echo ' -l list config'
+ echo ' -d dump output and discard any changes'
+ echo ' -c check for updates'
+ echo ''
+}
+
+edit() {
+ ${EDITOR} "${CONFIGFILE}"
+ return $?
+}
+
+list() {
+ grep -v '^#' "${CONFIGFILE}"
+}
+
+check() {
+ 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 [ $? -ne 0 ]; then
+ quit 1
+ fi
-touch "${LOCKFILE}"
+ if [ "${filter}" != "" ]; then
+ dump=$(echo "${dump}" | eval "${filter}")
+ fi
+ if $DRYRUN; then
+ echo "$dump"
+ else
+ sum=$(echo "${line}" | sha1sum | awk '{print $1;}')
+ cachefile="${CACHEDIR}/${sum}"
-while read line; do
- if echo "${line}" | grep -q -v '^#'; then
- data=(${line})
- url="${data[0]}"
- filter="${data[@]:1}"
+ if [ -f "$cachefile" ]; then
+ echo "$dump" | diff -u \
+ --label "local copy from $(/usr/bin/stat --printf='%y' ${cachefile})" "$cachefile" \
+ --label "${url}" - \
+ || echo
+ fi
- if echo "$url}" | grep -q '^@'; then
- url="$(echo "${url}" | cut -c 1 --complement -)"
- dump=$(lynx -source "$url")
- else
- dump=$(lynx -dump "$url")
+ echo "$dump" > "$cachefile"
+ fi
fi
+ done < "${CONFIGFILE}"
+}
- if [ $? -ne 0 ]; then
- rm -f "${LOCKFILE}"
- exit 1
- fi
+collectGarbage() {
+ for cacheEntry in "${CACHEDIR}/"*; do
+ cacheSum=$(basename "$cacheEntry")
- if [ "${filter}" != "" ]; then
- dump=$(echo "${dump}" | eval "${filter}")
- fi
+ while read configEntry; do
+ if echo "${configEntry}" | grep -q -v '^#'; then
+ configSum=$(echo "$configEntry" | sha1sum | awk '{print $1;}')
- 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 "${url}" - \
- || echo
+ if [ "$cacheSum" == "$configSum" ]; then
+ continue 2
+ fi
fi
+ done < "${CONFIGFILE}"
- echo "$dump" > "$cachefile"
- fi
- fi
-done < "${CONFIGFILE}"
-
-# remove old cache entries
-for cacheEntry in "${CACHEDIR}/"*; do
- cacheSum=$(basename "$cacheEntry")
+ rm -f $cacheEntry
+ done
+}
- while read configEntry; do
- if echo "${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
+while getopts 'eldc' option; do
+ case $option in
+ e) edit; quit $?;;
+ l) list; quit 0;;
+ d) DRYRUN=true; check; quit 0;;
+ c) check; collectGarbage; quit 0;;
+ *) usage; quit -1;;
+ esac
done
-rm -f touch "${LOCKFILE}" \ No newline at end of file
+usage
+quit -1