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* Get rid of the substitutes database table (NIX-47). Instead, if we

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need any info on substitutable paths, we just call the substituters
  (such as download-using-manifests.pl) directly.  This means that
  it's no longer necessary for nix-pull to register substitutes or for
  nix-channel to clear them, which makes those operations much faster
  (NIX-95).  Also, we don't have to worry about keeping nix-pull
  manifests (in /nix/var/nix/manifests) and the database in sync with
  each other.

  The downside is that there is some overhead in calling an external
  program to get the substitutes info.  For instance, "nix-env -qas"
  takes a bit longer.

  Abolishing the substitutes table also makes the logic in
  local-store.cc simpler, as we don't need to store info for invalid
  paths.  On the downside, you cannot do things like "nix-store -qR"
  on a substitutable but invalid path (but nobody did that anyway).

* Never catch interrupts (the Interrupted exception).
This commit is contained in:
Eelco Dolstra 2007-08-12 00:29:28 +00:00
parent 4695f4edd6
commit 9e975458b4
24 changed files with 357 additions and 469 deletions
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30
doc/manual/nix-store.xml
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@ -649,36 +649,6 @@ $ gv graph.ps</screen>
<!--######################################################################-->
<!--
<refsection><title>Operation <option>-XXX-substitute</option></title>
<refsection><title>Synopsis</title>
<cmdsynopsis>
<command>nix-store</command>
<arg choice='plain'><option>-XXX-substitute</option></arg>
<arg choice='plain'
rep='repeat'><replaceable>srcpath</replaceable> <replaceable>subpath</replaceable></arg>
</cmdsynopsis>
</refsection>
<refsection><title>Description</title>
<para>The operation <option>-XXX-substitute</option> registers that the
store path <replaceable>srcpath</replaceable> can be built by
realising the derivation expression in
<replaceable>subpath</replaceable>. This is used to implement binary
deployment.</para>
</refsection>
</refsection>
-->
<!--######################################################################-->
<refsection xml:id='refsec-nix-store-verify'><title>Operation <option>--verify</option></title>