Transpile references to BASH_SOURCE variable

[Brassrat]

Seems that $0 is like 'sh'?
shouldn't it be the path to the '.js' file?
preferably some absolute version of the path to the js file?

[nfischer]

I think it's the path to the script, as specified on the CLI:

$ cat print0.sh
#!/bin/bash
echo $0
$ bash print0.sh # notice the output is exactly what I type here
print0.sh
$ bash ./print0.sh # again, it prints whatever I typed
./print0.sh

So, it's not guaranteed to be an absolute path.

[Brassrat]

yes $0 is not guaranteed to be an absolute path in BASH - for that one uses either BASH_SOURCE or something like (cd -P $0)

[nfischer]

FWIW I think we implement this correctly. We translate $0 to process.argv[1], which is the path to the script file. Note that process.argv[0] is the path to NodeJS itself.

Closing this because I think it's WAI, but let me know if I'm mistaken.

[Brassrat]

i suggested implementing $0 as the absolute path to obviate the need to support BASH_SOURCE[0].
Admittedly, node provides __dirname.

[nfischer]

I think $0 is right as-is, but I might accept a PR for BASH_SOURCE, if you know how to implement all the entries and can point to docs.

Renaming this issue to reflect that.