bin/build not work on linux because builtin cd will output the folder name.

[zw963]

 ╰─ $ builtin cd bin
/home/zw963/bin

 ╭─ 02:05  zw963 ⮀ ~/bin ⮀ ➦   0 
 ╰─ $ cd ..

 ╭─ 02:06  zw963 ⮀ ~ ⮀ ➦   0 
 ╰─ $ \cd bin
/home/zw963/bin

So, this the following output will be:

here=$(cd "$(dirname "$BASH_SOURCE")"; pwd)

The here variable would output 2 line string, instead only 1 line.

 ╰─ $ bin/1.sh 
+++ dirname bin/1.sh
++ cd bin
++ pwd
+ here='/home/zw963/bin
/home/zw963/bin'

here is /home/zw963/bin /home/zw963/bin

so, it should be fix with:

here=$(cd "$(dirname "$BASH_SOURCE")" >/dev/null; pwd)

print the cd folder name probably is a shell config issue, but, anyway, new config more robust.

[zw963]

BTW, this issue only happen when set $CDPATH