Re: proposed BASH_SOURCE_PATH

[Léa Gris]

Le 14/05/2024 à 08:08, Martin D Kealey écrivait :
> I wholeheartedly support the introduction of BASH_SOURCE_PATH, but I would
> like to suggest three tweaks to its semantics.
>
> A common pattern is to unpack a script with its associated library & config
> files into a new directory, which then leaves a problem locating the
> library files whose paths are only known relative to $0 (or
> ${BASH_SOURCE[0]}).

This needs to resolve symbolic links otherwise path will be that of the 
symbolic link rather than that of the actual script file:

mkdir ./tests/
cat > ./tests/real_bash_source_dir_test <<'BASH'
#!/usr/bin/env bash
real_source=$(realpath "${BASH_SOURCE[0]}")
real_source_dir=${real_source%/*}
printf 'Real Bash source dir: %s\n' "$real_source_dir"
BASH
chmod +x ./tests/real_bash_source_dir_test
ln -sr ./tests/real_bash_source_dir_test ./


Then you get same answer in both cases:
./tests/real_bash_source_dir_test
./real_bash_source_dir_test

--
Léa Gris