49 lines
1.8 KiB
XML
49 lines
1.8 KiB
XML
<appendix>
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<title>Bugs / To-Do</title>
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<itemizedlist>
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<listitem>
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<para>
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Unify the concepts of successors and substitutes into a
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general notion of <emphasis>equivalent expressions</emphasis>.
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Expressions are equivalent if they have the same target paths
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with the same identifiers. However, even though they are
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functionally equivalent, they may differ stronly with respect
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to their <emphasis>performance characteristics</emphasis>.
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For example, realising a closure expression is more efficient
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that realising the derivation expression from which it was
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produced. On the other hand, distributing sources may be more
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efficient (storage- or bandwidth-wise) than distributing
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binaries. So we need to be able to attach weigths or
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priorities or performance annotations to expressions; Nix can
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then choose the most efficient expression dependent on the
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context.
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</para>
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</listitem>
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<listitem>
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<para>
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<emphasis>Build management.</emphasis> In principle it is already
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possible to do build management using Nix (by writing builders that
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perform appropriate build steps), but the Nix expression language is
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not yet powerful enough to make this pleasant (?). The language should
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be extended with features from the <ulink
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url='http://www.cs.uu.nl/~eelco/maak/'>Maak build manager</ulink>.
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Another interesting idea is to write a <command>make</command>
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implementation that uses Nix as a back-end to support <ulink
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url='http://www.research.att.com/~bs/bs_faq.html#legacy'>legacy</ulink>
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build files.
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</para>
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</listitem>
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</itemizedlist>
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</appendix>
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<!--
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local variables:
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sgml-parent-document: ("book.xml" "appendix")
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end:
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-->
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