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lang-bash
MY_BASE=$(echo $0)?MY_BASE=$0is better.mylib.shis sourced inside other scripts that are supposed to be sourced, and which source other scripts? IINM, when you source a script from your shell,$0remains the name of the shell (-bash), so insidemylib.shmight be sourced multiple times.source test.sh;sysLOG Hi!, right? As long as the rest part ofmylib.shcontains functions only, I think, being sourced multiple times will not cause troubles. Since the goal of$MY_BASEis making debug easier formylib.sh.${#BASH_SOURCE[@]}to check if the command is being sourced. For instance:[[ "${MY_BASE:0:1}" != "-" || ${#BASH_SOURCE[@]} -gt 1 ]](this means that its source level is greater than 1, which means it's been sourced by another file being source).shdoesn't have$BASH_SOURCE, it gives out errors. I will dig more about it. If I can come out more suitable solutions I will edit my answer.