[erlang-questions] program to analyse function usage

[Pierre Fenoll]

You can use the index at other.erldocs.com/apps.js for a list of >10k Erlang projects, then the meta information (Erlang terms) at other.erldocs.com/Site/User/Repo/meta.txt if you need it. 

The website is updated daily. I'm working on adding a pass that would enable people to run their code in order to get more information out of all those projects. 
But uh. That's in the works. 



On 18 Jun 2015, at 08:19, Rich Morin <rdm@REDACTED> wrote:

>> I'd like to analyse a very large set of Erlang programs to see
>> which functions in the standard libraries actually get used.
> 
> The definition of "actually get used" is a tricky one.  If my
> code references a function (directly or indirectly), but only
> calls it in very unusual circumstances, is that of interest?
> 
> Incidentally, this question brings to mind the notion of "tree
> shaking", as performed by Google's Closure compiler:
> 
>  https://developers.google.com/closure/compiler/
> 
> The ClojureScript folks use this to eliminate functions from
> their generated code sets.  It might be that a similar approach
> could be used to optimize the loading of Erlang functions.
> 
> 
>> Does anybody have a large collection of erlang modules?
> 
> I don't have much to offer except for this tiny list, but I'd
> be very interested in knowing about what you find:
> 
>  http://wiki.cfcl.com/Projects/Elixir/Erlex/Testing#Code_Bases
> 
> Given that disk is basically free in the amounts you'll need, it
> might be worthwhile to think about setting up the collection as
> a long-term community resource for assorted analytic efforts.
> 
> 
>> Failing this I guess I could scrape code from github - is there
>> any way to programmatically fetch all erlang modules from github?
> 
> I'm pretty sure that there's no single command that would pull
> down all of the Erlang modules from GitHub, but there's a REST
> API that would let you assemble a list of prospects, download
> files, etc:
> 
>  https://developer.github.com/v3
> 
> 
>> also are there some download limits that I need to be
>> aware of - I don't want to get barred from github :-)
> 
> Once you have scaled the problem (i.e., assembled a pick list
> with size statistics), you might want to contact them with
> a detailed question.  Even if it doesn't get a useful response,
> you'll have given them fair warning...
> 
>  https://github.com/contact?form%5Bsubject%5D=APIv3
> 
> -r
> 
> -- 
> http://www.cfcl.com/rdm           Rich Morin           rdm@REDACTED
> http://www.cfcl.com/rdm/resume    San Bruno, CA, USA   +1 650-873-7841
> 
> Software system design, development, and documentation
> 
> 
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