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On Fri, May 29, 2009 at 01:36:20AM +0200, René 'Necoro' Neumann wrote: |
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> Package "spam" rdepends on "=eggs-2". |
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> Package "bacon" rdepends on "=eggs-1". |
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> |
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> So in theory there should be no way of installing them together (given |
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> that eggs is not slotted). This works if I try to install them in one go. |
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> |
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> !!! Multiple package instances within a single package slot have been pulled |
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> !!! into the dependency graph, resulting in a slot conflict: |
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> |
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> app-test/eggs:0 |
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> |
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> ('ebuild', '/', 'app-test/eggs-2', 'merge') pulled in by |
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> =app-test/eggs-2 required by ('ebuild', '/', 'app-test/spam-1', 'merge') |
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> |
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> ('ebuild', '/', 'app-test/eggs-1', 'merge') pulled in by |
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> =app-test/eggs-1 required by ('ebuild', '/', 'app-test/bacon-1', |
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> 'merge') |
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> |
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> |
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> It looks different, if spam is installed and I try to install bacon |
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> additionally: |
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> |
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> # emerge -1av bacon |
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> |
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> These are the packages that would be merged, in order: |
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> |
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> Calculating dependencies ... done! |
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> [ebuild UD] app-test/eggs-1 [2] 0 kB [1] |
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> [ebuild N ] app-test/bacon-1 0 kB [1] |
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> |
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> |
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> This second behavior looks wrong to me, as it downgrades the RDEPEND of |
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> spam and thus spam becomes unusable. |
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Try: emerge -1av --complete-graph bacon |
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Unless --complete-graph is specified emerge won't pull in the entire |
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dependency graph, thus won't notice the dependency-spec of |
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app-test/spam. |
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Using -D combined with the world set when updating your system yields |
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the same result as that also pulls in the entire dependency graph. |
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|
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Unless the entire dependency graph is pulled in emerge only tries to |
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satisfy the dependencies of the packages given on the commandline, and |
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since there's no "connection" between app-test/spam and app-test/bacon, |
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and emerge doesn't do reverse deps when adding something to the |
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dep-graph, it doesn't notice that app-test/bacon and app-test/spam has |
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conflicting dependencies |
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|
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Using --complete-graph is noticably slower since it slows down |
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dependency calculations, but it should (IMHO) really be the default |
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since these conflicts shows _before_ anything breaks. |
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