erlmerge - The new way to install Erlang apps.

[Reto Kramer]

Tobbe,

Erlmerge is great!

Quick question though - let's say I do install an app like the esmb 
package itself that declares it's package dependencies to be the 
specific version numbers you have in your example.
    {dependencies,[..., ..., {fd_server,"2.3.0"}, ...]}

Some time later I upgrade fd_server to 2.4.0 (some app, other than 
esmb, may require 2.4 and pulls it in). The good citizen developer of 
fd_server of course made the 2.4 version backwards compatible with 2.3 
(promise ;-).

Will I need to create a new esmb.app file (which includes the fd_server 
2.4 reference) and force all users to "upgrade" esmb, or is the 
dependency declaration interpreted by the esmb system as
	... at least {fd_server, "2.3.0"} ...
but if any higher number is already installed the dependency is 
satisfied?
Or is the dependency declaration a string literal match with what's 
currently in the package database?

The fd_server 2.3.0 version is still in the erl/lib directory. Will it 
remain in the package database also?

What I'm looking for is really a way to say: "at least version 2.3 of 
fd_server". Is that the interpretation that is given to the 
declaration?

Thanks,
- Reto



On Jul 20, 2005, at 11:41 AM, tobbe wrote:

>
> erlmerge is a tool that makes it extremely easy to install
>
> and maintain Erlang software. The tool keeps a package
>
> database which makes it possible to install, delete, update
>
> Erlang applications. It also handles dependencies between
>
> applications.
>
>
>
> A full description can be found among the HowTo's:
>
>
>
>  http://www.trapexit.org/docs/howto/erlmerge.html
>
>
>
> It is still to be regarded as somewhat Beta, but I would
>
> like to get some feedback if possible.
>
>
>
> As a short teaser. To install the gettext package into your
>
> Erlang installation, do:
>
>
>
>   erlmerge -i gettext
>
>
>
> erlmerge will fetch the tar ball via HTTP and install
>
> it into your Erlang installation. After the above you
>
> just start Erlang, and voila:
>
>
>
> # erl
>
> Erlang (BEAM) emulator version 5.4.6 [source] [hipe]
>
> Eshell V5.4.6  (abort with ^G)
>
> 1> m(gettext).
>
> Module gettext compiled: Date: July 20 2005, Time: 15.54
>
> Compiler options:  
> [{cwd,"/usr/local/lib/erlang/lib/gettext-1.3.0/src"},
>
> ....etc...
>
>
>
> Cheers, Tobbe
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>