Resolve symlinks to find __origin

CHANGELOG.md

@@ -14,6 +14,7 @@ Released: TBA.
 [Diff](https://github.com/kvz/bash3boilerplate/compare/v2.4.2...master).
 
 - [x] Add feature to edit/update comments in ini file (#132, @rfuehrer)
+- [x] New magic variable `__origin` when called via symlink (@efelon)
 
 ## v2.4.2
 

README.md

@@ -166,6 +166,7 @@ We are looking for endorsements! Are you also using b3bp? [Let us know](https://
 - [Lukas Stockner](mailto:oss@genesiscloud.com)
 - [Gert Goet](https://github.com/eval)
 - [@rfuehrer](https://github.com/rfuehrer)
+- [@efelon](https://github.com/efelon)
 
 
 ## License

main.sh

@@ -47,6 +47,7 @@ fi
 __dir="$(cd "$(dirname "${BASH_SOURCE[${__b3bp_tmp_source_idx:-0}]}")" && pwd)"
 __file="${__dir}/$(basename "${BASH_SOURCE[${__b3bp_tmp_source_idx:-0}]}")"
 __base="$(basename "${__file}" .sh)"
+__origin="$(cd "$(dirname "$(readlink -f "${BASH_SOURCE[${__b3bp_tmp_source_idx:-0}]}")")" && pwd)"
 # shellcheck disable=SC2034,SC2015
 __invocation="$(printf %q "${__file}")$( (($#)) && printf ' %q' "$@" || true)"
 
@@ -412,6 +413,7 @@ info "__i_am_main_script: ${__i_am_main_script}"
 info "__file: ${__file}"
 info "__dir: ${__dir}"
 info "__base: ${__base}"
+info "__origin: ${__origin}"
 info "OSTYPE: ${OSTYPE}"
 
 info "arg_f: ${arg_f}"