83 lines
2.5 KiB
Bash
83 lines
2.5 KiB
Bash
#!/bin/bash
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function _exit_with_error
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{
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if [[ -n ${1+set} ]]
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then
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_log 'error' "${1}"
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else
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_log 'error' "Call to '_exit_with_error' is missing a message to log"
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fi
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_log 'error' 'Aborting'
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exit "${2:-1}"
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}
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# `dms_panic` methods are appropriate when the type of error is a not recoverable,
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# or needs to be very clear to the user about misconfiguration.
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#
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# Method is called with args:
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# PANIC_TYPE => (Internal value for matching). You should use the convenience methods below based on your panic type.
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# PANIC_INFO => Provide your own message string to insert into the error message for that PANIC_TYPE.
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# PANIC_SCOPE => Optionally provide a string for debugging to better identify/locate the source of the panic.
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function dms_panic
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{
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local PANIC_TYPE=${1}
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local PANIC_INFO=${2}
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local PANIC_SCOPE=${3} #optional
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local SHUTDOWN_MESSAGE
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case "${PANIC_TYPE:-}" in
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( 'fail-init' ) # PANIC_INFO == <name of service or process that failed to start / initialize>
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SHUTDOWN_MESSAGE="Failed to start ${PANIC_INFO}!"
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;;
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( 'no-env' ) # PANIC_INFO == <ENV VAR name>
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SHUTDOWN_MESSAGE="Environment Variable: ${PANIC_INFO} is not set!"
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;;
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( 'no-file' ) # PANIC_INFO == <invalid filepath>
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SHUTDOWN_MESSAGE="File ${PANIC_INFO} does not exist!"
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;;
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( 'misconfigured' ) # PANIC_INFO == <something possibly misconfigured, eg an ENV var>
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SHUTDOWN_MESSAGE="${PANIC_INFO} appears to be misconfigured, please verify."
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;;
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( 'invalid-value' ) # PANIC_INFO == <an unsupported or invalid value, eg in a case match>
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SHUTDOWN_MESSAGE="Invalid value for ${PANIC_INFO}!"
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;;
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( * ) # `dms_panic` was called directly without a valid PANIC_TYPE
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SHUTDOWN_MESSAGE='Something broke :('
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;;
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esac
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if [[ -n ${PANIC_SCOPE:-} ]]
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then
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_shutdown "${PANIC_SCOPE} | ${SHUTDOWN_MESSAGE}"
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else
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_shutdown "${SHUTDOWN_MESSAGE}"
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fi
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}
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# Convenience wrappers based on type:
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function dms_panic__fail_init { dms_panic 'fail-init' "${1}" "${2}"; }
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function dms_panic__no_env { dms_panic 'no-env' "${1}" "${2}"; }
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function dms_panic__no_file { dms_panic 'no-file' "${1}" "${2}"; }
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function dms_panic__misconfigured { dms_panic 'misconfigured' "${1}" "${2}"; }
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function dms_panic__invalid_value { dms_panic 'invalid-value' "${1}" "${2}"; }
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# Call this method when you want to panic (i.e. emit an 'ERROR' log, and exit uncleanly).
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# `dms_panic` methods should be preferred if your failure type is supported.
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function _shutdown
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{
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_log 'error' "${1}"
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_log 'error' 'Shutting down'
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sleep 1
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kill 1
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exit 1
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}
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