Show HN: CLI for executing code in many different languages with Docker

M8 · on April 8, 2015

Wanted to ask which one, but both seem appropriate :):

http://en.wikipedia.org/wiki/Common_Language_Infrastructure

http://en.wikipedia.org/wiki/Command-line_interface

andystanton · on April 8, 2015

Haha, I was going for the latter.

gizzlon · on April 8, 2015

Cool!

The Perl one seems to be perl6, not perl5: https://github.com/docker-exec/perl/blob/master/Dockerfile

Maybe you should rename it to Perl6? Perl 5 is still the standard in the Perl world..

andystanton · on April 8, 2015

I didn't do my research @gizzlon - I assumed it was backwards compatible!

Perhaps you can help - a quick Google suggests that a reasonable Perl 6 file extension is .p6 - is that standard in the Perl world?

dexec chooses a Docker image based on file extension. I'm planning to allow this to be overridden anyway, but it would be great if there is an easy way to distinguish between Perl 5 and 6 source files.

senorsmile · on April 8, 2015

perl6 will definitely not backwards compatible. AFAICT, if any extension is used, it will probably still be '.pl'. the hash bang line (at least in unix land) determines the specific interpreter to use. Besides that, perl6 is not quite production ready (although this it is supposed to be christmas this year). Perl6 doesn't even have one specific implementation, although it sounds like the first production ready version will be rakudo on top of the MoarVM.

Perl5 would be a much saner default. I would worry about supporting some version of perl6 at a later time.

btw, cool tool!

gizzlon · on April 8, 2015

Sure, I'll take a look at it tomorrow

andystanton · on April 19, 2015

@gizzlon @senorsmile perl 5 is now the default in the latest 1.0.1 release. perl6 is available too, either by using .p6 extension or specifying an override image with: dexec foo.pl --specify-image dexec/perl6

gnur · on April 8, 2015

As someone who wants to try a new language every month this is awesome!

It is literally every language I ever tried, and then some, this certainly lowers the bar for me to try some more.

andystanton · on April 8, 2015

Polygluttony was my original reason for making this too - I wanted an easy way to run solutions to Project Euler problems in different languages.

If you're interested each of the Docker Exec image repositories contains examples e.g.

https://github.com/docker-exec/haskell/tree/v1.0.0/test https://github.com/docker-exec/d/tree/v1.0.0/test https://github.com/docker-exec/racket/tree/v1.0.0/test etc

shark234 · on April 8, 2015

Interesting. IMHO it seems useful for playing around with different languages, but not for using it more seriously. Anyway, it looks fun, good job :)

andystanton · on April 8, 2015

Thanks! And you're right - it is not intended as a production tool.

ericmo · on April 8, 2015

Is the C# code built with Mono?

andystanton · on April 8, 2015

That's right @ericmo. The C# and F# Dockerfiles are derived from this Mono base image:

https://github.com/docker-exec/base-mono/blob/v1.0.0/Dockerf...

as can be seen from their respective Dockerfiles:

https://github.com/docker-exec/csharp/blob/v1.0.0/Dockerfile https://github.com/docker-exec/fsharp/blob/v1.0.0/Dockerfile

The actual execution invokes this script which calls mcs or fsharpc to compile, and then executes using the Mono runtime:

https://github.com/docker-exec/image-common/blob/v1.0.0/dexe...

fit2rule · on April 8, 2015

Needs more Lua! :)

andystanton · on April 19, 2015

@fit2rule Support for Lua has been added in version 1.0.1