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| author | Eelco Dolstra <e.dolstra@tudelft.nl> | 2007-05-01 20:33:18 +0000 |
|---|---|---|
| committer | Eelco Dolstra <e.dolstra@tudelft.nl> | 2007-05-01 20:33:18 +0000 |
| commit | a9d15d4f434fece269852a65be836d1338ed787d (patch) | |
| tree | 2b911d71e4641da7d164c4f8aeab930acef6a9a3 /src/libexpr/get-drvs.hh | |
| parent | cbfac2fdccc83b04d9c2027e9e21070d4ac7c7e5 (diff) | |
* nix-env -i: instead of breaking package ties by version, break them
by priority and version install. That is, if there are multiple
packages with the same name, then pick the package with the highest
priority, and only use the version if there are multiple packages
with the same priority.
This makes it possible to mark specific versions/variant in Nixpkgs
more or less desirable than others. A typical example would be a
beta version of some package (e.g., "gcc-4.2.0rc1") which should not
be installed even though it is the highest version, except when it
is explicitly selected (e.g., "nix-env -i gcc-4.2.0rc1").
* Idem for nix-env -u, only the semantics are a bit trickier since we
also need to take into account the priority of the currently
installed package (we never upgrade to a lower priority, unless
--always is given).
Diffstat (limited to 'src/libexpr/get-drvs.hh')
| -rw-r--r-- | src/libexpr/get-drvs.hh | 1 |
1 files changed, 1 insertions, 0 deletions
diff --git a/src/libexpr/get-drvs.hh b/src/libexpr/get-drvs.hh index 920197d1f..46dc51a56 100644 --- a/src/libexpr/get-drvs.hh +++ b/src/libexpr/get-drvs.hh @@ -34,6 +34,7 @@ public: string queryDrvPath(EvalState & state) const; string queryOutPath(EvalState & state) const; MetaInfo queryMetaInfo(EvalState & state) const; + string queryMetaInfo(EvalState & state, const string & name) const; void setDrvPath(const string & s) { |