env_helper

[Rainer Müller]

Bradley Giesbrecht wrote:
> On Mar 18, 2009, at 11:44 AM, Rainer Müller wrote:
> 
>> Rainer Müller wrote:
> [...]
>>> A user would only need to add this line to his .profile to load  
>>> MacPorts:
>>>  [ -f /opt/local/etc/profile ] && source /opt/local/etc/profile
>> What is left is the caching, I would still prefer that.
> 
> What is your idea as to when the cache gets updated?
> 
> I have mentioned user overrides so I would want the cache function to  
> be aware of things that might happen outside the port command like a  
> user editing a conf file.
> 
> I might not understand what you mean by caching. Since ~/.profile is  
> only sourced when a shell is first opened is the complexity of a cache  
> going to pay for itself?

If you are going to traverse the filesystem in ${prefix}/etc/profile and
concatenating values like PATH this probably gets slow. As long as no
file changes this will give the same result each time anyway.

So I would like to see a cache of this being generated by a command and
the result saved to ${prefix}/etc/profile.

We could also do the cache updates automatically in activate/deactivate
(install/uninstall in direct mode). But then we need to tell the user
that he absolutely has to do 'source ${prefix}/etc/profile' right now
after this command.

Rainer