IO.Io: openIn at src/smlnj/Basis/IO/text-io.sml error

[idkjs]

Thanks for sharing this!

I tried using it and got a IO.Io: openIn at src/smlnj/Basis/IO/text-io.sml error. Im on a mac and using zsh and Catalina, if that matters.

Tried with both zsh and bash.

~/Github/testing
❯ echo "fun foo x =     10" > test.sml

~/Github/testing
❯ smlformat -i test.sml 
IO.Io: openIn at src/smlnj/Basis/IO/text-io.sml:807.24

~/Github/testing
❯ bash
bash-5.0$ echo "fun foo x =    10" | smlformat -o test_output.sml
IO.Io: openIn at src/smlnj/Basis/IO/text-io.sml:807.24
bash-5.0$ 

Any ideas?

Thank you, friend.

[jluningp]

Thanks for trying this out!

The error indicates that the SML parser can't open its input file. My best guess is that the script needs to create two tempfiles (/tmp/smlformat.XXXXXX), and that is failing for some reason.

Try running

$ echo "fun foo x =      10" > test.sml
$ echo 'SmlFormat.formatToFile "test.sml" "test_output.sml";' | sml -m sources.cm > /dev/null

instead of smlformat. The smlformat script is just a small bash wrapper around that second command.

[idkjs]

No joy.

~/Github/Programming-Languages-Part-A master
❯ echo "fun foo x =      10" > test.sml

~/Github/Programming-Languages-Part-A master*
❯ echo 'SmlFormat.formatToFile "test.sml" "test_output.sml";' | sml -m sources.cm > /dev/null
/usr/local/smlnj/bin/sml: Fatal error -- Uncaught exception Io with <unknown> raised at Basis/Implementation/IO/text-io-fn.sml:792.25-792.71

~/Github/Programming-Languages-Part-A master*
~/Github/Programming-Languages-Part-A master*
❯ ls | grep test_output.sml

~/Github/Programming-Languages-Part-A master*
❯ ls | grep README
README.md

~/Github/Programming-Languages-Part-A master*
❯ ls | grep test_output

~/Github/Programming-Languages-Part-A master*
❯~/Github/Programming-Languages-Part-A master*
❯ cat test.sml
fun foo x =      10

So looks like test.sml gets created anyway.

[jluningp]

It looks like it's not finding the sources.cm file that it needs to load. Where are you running the command from? If you replace sources.cm in my initial suggestion SMLFORMAT_DIR/sources.cm where SMLFORMAT_DIR is wherever you cloned this repo, does it work?

I also just pushed a fix to a (maybe) separate macOS bug, so it might be worth pulling and trying again.