On Fri, Jan 13, 2017 at 12:59:20AM -0800, Chris Marusich wrote:

     Is this procedure supposed to work with relative paths?  I get strange
     results for "foo/bar":

No.  It was not indended to be passed a relative path.  I cannot see what meaning
that would have - it raises the question "relative to what?".  However if somehow
we can define what it means to pass the procedure a relative path, then I suppose
it could be modified to work.
     
     It seems to me like we could just use 'string-prefix?' here instead.  Am
     I missing something?  Is it really necessary to define an 'all-subpaths'
     procedure and use 'member' if 'string-prefix?' is good enough?

Well, (string-prefix? "/dev/net" "/dev/networking") would return #t, but
the former is not an ancestor of the other.
     
     The title of this patch is "Mark /gnu/store as needed for boot."  I can
     see how this change makes that happen.  But what is the purpose?  I
     imagine that in some cases, if you don't do this, the initrd might not
     mount the file system containing the store, which of course would not be
     good.  Do you have a specific problem case in mind?

Yes.

I tried installing GuixSD with /gnu/store on a different partition to /
The installation seemed to go ok, but it failed to boot, presumably because 
lots of essential things (such as the kernel!) are in /gnu/store

J'


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