Excerpts from Rommel Martinez's message of Sat May 03 09:46:00 +0000 2014:
> Let's presume that I have run the command 'nix-env --set-flag priority ...'
> many times and I have lost track of what they were, how can I "reset"
> them to the default state?
Following profile links to store, cp -L (dereferencing) them to /tmp and
running diff -r shows:
diff -r 11/manifest.nix 22/manifest.nix
1c1
< [ { meta = { }; name = "nvi-1.79"; out = { outPath =
"/nix/store/lcb2rbrhb183lbsxhk512d297ymv85j0-nvi-1.79"; }; outPath =
"/nix/store/lcb2rbrhb183lbsxhk512d297ymv85j0-nvi-1.79"; outputs = [ "out" ];
type = "derivation"; } ]
\ No newline at end of file
---
> [ { meta = { priority = "20"; }; name = "nvi-1.79"; out = { outPath =
> "/nix/store/lcb2rbrhb183lbsxhk512d297ymv85j0-nvi-1.79"; }; outPath =
> "/nix/store/lcb2rbrhb183lbsxhk512d297ymv85j0-nvi-1.79"; outputs = [ "out" ];
> system = "unknown"; type = "derivation"; } ]
\ No newline at end of file
Thus read ~/.nix-profile/manifest.nix
How to change/reset? Does'nt look like nix-env provides a command (I
might have missed it again).
>From buildenv.nix (nix distribution): (d.meta.priority or 5)
thus default priority is 5.
Now from nix-env:
--meta
Print all of the meta-attributes of the derivation. This option is
only available with --xml.
Thus I'd suggest:
nix-env -q --xml --meta
and there it is:
<?xml version='1.0' encoding='utf-8'?>
<items>
<item attrPath="0" name="nvi-1.79" system="unknown">
<meta name="priority" type="string" value="20" />
</item>
</items>
If you want to change something you at least have some pointers where/how to
get started.
I've changed the subject hoping that its easier for google to find this
post in the future.
Marc Weber
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