executes the parameters, checks the exit code, prints log file to stderr in case exit code is not 0, helpful for running crontab

.gitignore

/logs

README.md

CTR (crontab-runner)

Executes the parameters, checks the exit code, prints log file to stderr in case exit code is not 0.

Helpful for running cron jobs to only get mails on errors, but with full logs attached

Cloning the gist

git clone https://gist.github.com/053acab10ecea3c4d0f9ec858a6b35b2.git ctr

proving it works

with exit code != 0

./ctr/crrontab-runner.sh ./ctr/test-failing.sh

will print all possible information to stderr (and exit with the same error code as test-failing.sh)

with exit code == 0

./ctr/crrontab-runner.sh ./ctr/test-success.sh

will only print the executed command and the logfile it writes to to stdout

crontab-runner.sh

#!/usr/bin/env bash

cd "$(dirname "$0")" && mkdir -p logs
DATE=$(date "+%FT%H-%M-%S")
LOGFILE="$(pwd)/logs/$(basename "$1").${DATE}.log"

log_on_error () {
  EC=$?
  if [[ ${EC} -ne 0 ]] ; then
    >&2 echo "log from 'bash \"${COMMANDS}\"' written to ${LOGFILE}"
    >&2 cat "${LOGFILE}"
    >&2 echo "exit code was ${EC}"
    exit ${EC}
  fi
}
trap log_on_error EXIT

COMMANDS=${*:1}
echo "running: 'bash \"${COMMANDS}\"' writing to ${LOGFILE}"
bash "${COMMANDS}" > "${LOGFILE}" 2>&1

test-failing.sh

#!/usr/bin/env bash
set -xe

pwd

exit 15

test-success.sh

#!/usr/bin/env bash
set -xe

pwd