gistfile1.sh

#!/bin/bash

if [ $# -lt 1 -o $# -gt 4 ]
then
        echo "Usage: $0 log_to_be_checked [cc-emails [to-email [subject]]]" >&2
        exit 1
fi

LOGFILE="$1"
TSFILE="${LOGFILE}.ts"
MAXLOGLINES=50
MAIL_CC=${2:-user@example.com}
MAIL_TO=${3:-owner@example.com}
MAIL_SUBJ_TPL=${4:-New data in ${LOGFILE}}

if [ ! -e "${LOGFILE}" ]
then
        exit 0
fi

if [ ! "${LOGFILE}" -nt "${TSFILE}" ]
then
        exit 0
fi

TMPLOGFILE="${LOGFILE}.`date +%s`"
mv "${LOGFILE}" "${TMPLOGFILE}"
touch --reference="${TMPLOGFILE}" "${LOGFILE}"
chown --reference="${TMPLOGFILE}" "${LOGFILE}"
chmod --reference="${TMPLOGFILE}" "${LOGFILE}"
since_line="."
if [ -e "${TSFILE}" ]
then
        ts_mtime=`stat --print='%y' "${TSFILE}"` 2>/dev/null
        if [ $? -eq 0 ]
        then
                since_line="\nsince ${ts_mtime}${since_line}"
        fi
fi

# Get record id
RID=`sed '1,/Stack trace/d; /^$/,$d; s/\s.*//' "${TMPLOGFILE}" | md5sum | head -c 4`

# Get project name
PRID=`echo ${LOGFILE} | sed -e "s:/www/\([^/]\+\)/\([^/]\+\)/.*:\2.\1:"`

# Get subject
MAIL_SUBJ=`eval "echo ${MAIL_SUBJ_TPL}"`

( echo -e "There are new records in ${LOGFILE}${since_line}

It was renamed into ${TMPLOGFILE}.

Showing at most ${MAXLOGLINES} lines of it:

===========================================================
"; tail -n ${MAXLOGLINES} "${TMPLOGFILE}"; echo -e "\n===========================================================\n" ) | /bin/mail -c "${MAIL_CC}" -s "${MAIL_SUBJ}" "${MAIL_TO}"

touch "${TSFILE}"

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