nix-gh/src/buildenv
Matthieu Coudron 6920c23701 Improve error message for conflicting priorities
I find the error message 'nix-env --set-flag priority NUMBER PKGNAME'
not as helpful as it could be :
- doesn't share the current priorities
- doesn't say that the command must be run on the already installed
PKGNAME (which is confusing the first time)
- the doc needs careful reading:
"If there are multiple derivations matching a name in args that have the same name (e.g., gcc-3.3.6 and gcc-4.1.1), then the derivation with the highest priority is used."
if one stops reading there, he is screwed. Salvation comes with reading "A derivation can define a priority by declaring the meta.priority attribute. This attribute should be a number, with a higher value denoting a lower priority. The default priority is 0."
To sum it up, lower number wins. I tried to convey this idea in the
message too.
2017-09-21 10:25:20 +09:00
..
buildenv.cc Improve error message for conflicting priorities 2017-09-21 10:25:20 +09:00
local.mk Fix Fedora build 2016-08-30 13:56:22 +02:00