[erlang-questions] How do I include a library across muiltple apps in a release?

Mazen Harake <>
Sat Aug 30 17:45:27 CEST 2008


You should do as you already suggested... make a library application. It 
is not overkill, it is good practice. If you add it to your rel-file and 
use OTP release handling with that then the library will always be part 
of your release. This is a good thing
/Mazen

Matt Williamson wrote:
> To make things clear. My goal is to share a library module across 
> multiple application in a release, but I'm not quite sure how to go 
> about it.
>
> On Sat, Aug 30, 2008 at 8:22 AM, Dale Harvey < 
> <mailto:>> wrote:
>
>     you only need to write a .app file
>     from http://erlang.org/doc/design_principles/applications.html#7
>
>     The contents of a minimal .app file for a library application
>     libapp looks like this:
>
>     {application, libapp, []}.
>         
>
>     (I think the docs might be misleading though, I got errors using
>     the minimal,
>     this is what I use
>
>     {application, appname, [
>       {description, "Description"},
>       {vsn, "1.0"},
>       {modules,[]},
>       {registered,[]},
>       {applications, [kernel, stdlib]}
>     ]}.
>
>     then have systools find that app file when generating the .rel
>
>     2008/8/30 Matt Williamson <
>     <mailto:>>
>
>         Let's say I have a typical release directory like so:
>
>         /myrel
>             |- lib/
>                 |- app1/
>                     |- src/
>                     |- ebin/
>                     |- include/
>                     |- doc/
>                 |- app2/...
>                 |- app3/...
>
>         How would I include a single module, which can be called by
>         modules in all of the applications? The only two ways I can
>         think of is make it into an app (I personally think that's
>         overkill because I just want to call a function in the module)
>         or make a symlink, which won't work in windows.
>
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>
>
>
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-- 
Mazen Harake <>
Erlang Software Developer and Consultant,
Erlang Training & Consulting, Ltd

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