86 lines
2.2 KiB
Bash
86 lines
2.2 KiB
Bash
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#!/usr/bin/env bash
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# Try / catch in bash
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#
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# ````
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# #!/bin/bash
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# export AnException=100
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# export AnotherException=101
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#
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# # start with a try
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# try
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# ( # open a subshell !!!
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# echo "do something"
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# [ someErrorCondition ] && throw $AnException
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#
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# echo "do something more"
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# executeCommandThatMightFail || throw $AnotherException
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#
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# throwErrors # automaticatly end the try block, if command-result is non-null
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# echo "now on to something completely different"
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# executeCommandThatMightFail
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#
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# echo "it's a wonder we came so far"
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# executeCommandThatFailsForSure || true # ignore a single failing command
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#
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# ignoreErrors # ignore failures of commands until further notice
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# executeCommand1ThatFailsForSure
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# local result = $(executeCommand2ThatFailsForSure)
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# [ result != "expected error" ] && throw $AnException # ok, if it's not an expected error, we want to bail out!
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# executeCommand3ThatFailsForSure
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#
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# # make sure to clear $ex_code, otherwise catch * will run
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# # echo "finished" does the trick for this example
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# echo "finished"
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# )
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# # directly after closing the subshell you need to connect a group to the catch using ||
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# catch || {
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# # now you can handle
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# case $ex_code in
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# $AnException)
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# echo "AnException was thrown"
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# ;;
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# $AnotherException)
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# echo "AnotherException was thrown"
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# ;;
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# *)
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# echo "An unexpected exception was thrown"
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# throw $ex_code # you can rethrow the "exception" causing the script to exit if not caught
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# ;;
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# esac
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# }
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# ```
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# Source: https://stackoverflow.com/a/25180186`
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# shellcheck disable=SC2034
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Logger="${BASH_SOURCE[0]}../log"
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# @description Turn on fail on errors mode
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function try() {
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[[ $- = *e* ]]; SAVED_OPT_E=$?
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set +e
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}
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# @description Turn on fail on errors mode
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function throw() {
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exit "$1"
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}
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# @description Turn on fail on errors mode
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function catch() {
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export ex_code=$?
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# shellcheck disable=SC2004
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(( $SAVED_OPT_E )) && set +e
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return $ex_code
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}
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# @description Turn on fail on errors mode
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function throwErrors() {
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set -e
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}
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# @description Do not fail on errors mode
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function ignoreErrors() {
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set +e
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}
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