dev/nixpkgs
1
0
Fork 0
Code Issues Pull Requests Actions 2 Packages Projects Releases Wiki Activity

* In the generation of the `options.xml' file used to produce the

Browse Source 
NixOS manual and  manpages, remove all derivation attributes except
  the `name' attribute.  This cuts the size of `options.xml' from 7.0
  MiB to 473 KiB, and more importantly, cuts evaluation time of the
  system derivation from 1.63s to 1.10s on my laptop (a 32%
  improvement).

svn path=/nixpkgs/trunk/; revision=21739
This commit is contained in:
Eelco Dolstra 2010-05-12 11:07:49 +00:00
parent da7e1fbea3
commit 9ec34da2ee
1 changed files with 14 additions and 2 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

16
pkgs/lib/options.nix
View File

@ -262,8 +262,8 @@ rec {
declarations = map (x: toString x.source) opt.declarations;
definitions = map (x: toString x.source) opt.definitions;
}
// optionalAttrs (opt ? example) { example = opt.example; }
// optionalAttrs (opt ? default) { default = opt.default; };
// optionalAttrs (opt ? example) { example = scrubOptionValue opt.example; }
// optionalAttrs (opt ? default) { default = scrubOptionValue opt.default; };
subOptions =
if opt ? options then
@ -275,4 +275,16 @@ rec {
) [] options;
/* This function recursively removes all derivation attributes from
`x' except for the `name' attribute. This is to make the
generation of `options.xml' much more efficient: the XML
representation of derivations is very large (on the order of
megabytes) and is not actually used by the manual generator. */
scrubOptionValue = x:
if isDerivation x then { type = "derivation"; drvPath = x.name; name = x.name; }
else if isList x then map scrubOptionValue x
else if isAttrs x then mapAttrs (n: v: scrubOptionValue v) x
else x;
}