Gentoo Archives: gentoo-osx

From: Finn Thain <fthain@××××××××××××××××.au>
To: gentoo-osx@l.g.o
Subject: Re: [gentoo-osx] Re: [RFC] Separate alt-prefix repo for base-system packages.
Date: Tue, 30 Aug 2005 11:34:02
Message-Id: Pine.LNX.4.63.0508301337320.5950@loopy.telegraphics.com.au
In Reply to: Re: [gentoo-osx] Re: [RFC] Separate alt-prefix repo for base-system packages. by Brian Harring
1 On Mon, 29 Aug 2005, Brian Harring wrote:
2
3 > The rewrite's domain's abstraction (additionally the goal of binding the
4 > resolver to the domain, and being able to do inter-domain resolving)
5 > would allow for this, but I *really* don't think it'll work well.
6 >
7 > Reasoning is, how do you know that pkg xyz is actually the package
8 > you're after?
9
10 Not sure I understand the problem... in glep 37, a virtual is replaced
11 with a meta-package having a list of depends alternatives. If you add the
12 vendor package to that list, and then make the vendor packages
13 "package.preferred" where portage is a secondary package manager, surely
14 there is no question that package xyz is the one you're after?
15
16 (I'm assuming all repos share the same namespace WRT package names... if
17 cpv's do not have to be unique accross repos, other solutions might be
18 possible...)
19
20 > The expanded restrictions subsystem, specifically ability to depends
21 > based on contents restrictions (I want the pkg that owns file abc
22 > essentially) gives basic ability for this
23
24 I don't understand why portage would go looking for deps in the
25 filesystem. If configure can't find them, does it help that portage can?
26
27 The last I read about this was here...
28 http://article.gmane.org/gmane.linux.gentoo.devel/28154
29 I guess there is more too it?
30
31 > but it doesn't cover the abi angle.
32
33 I hadn't considered the ABI problem. In the short term I think a synthetic
34 package.provided is okay, since most multilib machines cater to the
35 ABI-ignorant.
36
37 But, generating package.provided with a wrapper is a hack, so long term, a
38 vendor package manager (or a shim on top of it) would have to state what
39 ABI was used for each package, when queried. Knowing the ABIs of the
40 vendor packages, and knowing the native ABI of the target domain (?), the
41 resolver could probably do the right thing...
42
43 > What you're proposing could sort of be hacked together to pull off
44 > strictly for src compiles, probably with a good collection of impossible
45 > to quash annoying bugs. Doing it for binaries is a helluva lot harder
46 > though. :)
47
48 I think these are the bugs which have been the gentoo-osx team's burden
49 already... brave souls that they are :-)
50
51 > The rewrite's general core is intended to allow for alt
52 > formats/repos/whatever jammed into it; that said, making seperate
53 > formats play nice with each other (unless they can natively) isn't
54 > something I think is incredibly easy to pull off, as mentioned above.
55 >
56 > Thoughts?
57
58 I probably need a better handle on the constraints of the relations
59 between domains, repos, prefixes... anyway, here is my naive partial
60 config. This config is premature, of course, but it might help me
61 understand what is and is not possible in the rewrite if you would kindly
62 shoot some holes in it ;-)
63
64 Notes: I've used a hypothetical feature for collecting information about
65 vendor packages -- presumably the apple domain also needs an ephemeral vdb
66 to hold it (like package.provided). I don't know if this vendor domain
67 needs a repo. I guess the main repo would have to mask broken/testing
68 vendor deps as it sees fit, including those from other domains...
69
70 -f
71
72
73 [vdb]
74 type = repo
75 class = portage.installed_pkg.repository
76 path =
77
78 [rsync repo]
79 type = repo
80 class = portage.ebuild.repository
81 path = /opt/gentoo/usr/portage
82
83 [ppc-macos]
84 type = config
85 ACCEPT_KEYWORDS = "ppc-macos"
86
87 [default domain]
88 type = domain
89 root = "/opt/gentoo"
90 repositories = 'rsync repo' vdb
91 config = ppc-macos
92
93 [vendor-apple]
94 type = config
95 FEATURES = "query-apple-packages"
96 ACCEPT_KEYWORDS = "ppc-darwin"
97
98 [apple domain]
99 type = domain
100 root = "/"
101 config = vendor-apple
102
103
104
105 --
106 gentoo-osx@g.o mailing list

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