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| author | Eelco Dolstra <e.dolstra@tudelft.nl> | 2007-02-02 01:52:42 +0000 |
|---|---|---|
| committer | Eelco Dolstra <e.dolstra@tudelft.nl> | 2007-02-02 01:52:42 +0000 |
| commit | 451dbf687f65b42d70e64c3858771abaab51b356 (patch) | |
| tree | 2954eb3c33c2d3800ac1f4296d4c694613485079 /src/libexpr/get-drvs.cc | |
| parent | f52de527c7743d8fe28574f02b632566a1006244 (diff) | |
* nix-env now maintains meta info (from the `meta' derivation
attribute) about installed packages in user environments. Thus, an
operation like `nix-env -q --description' shows useful information
not only on available packages but also on installed packages.
* nix-env now passes the entire manifest as an argument to the Nix
expression of the user environment builder (not just a list of
paths), so that in particular the user environment builder has
access to the meta attributes.
* New operation `--set-flag' in nix-env to change meta info of
installed packages. This will be useful to pass per-package
policies to the user environment builder (e.g., how to resolve
collision or whether to disable a package (NIX-80)) or upgrade
policies in nix-env (e.g., that a package should be "masked", that
is, left untouched by upgrade actions). Example:
$ nix-env --set-flag enabled false ghc-6.4
Diffstat (limited to 'src/libexpr/get-drvs.cc')
| -rw-r--r-- | src/libexpr/get-drvs.cc | 10 |
1 files changed, 10 insertions, 0 deletions
diff --git a/src/libexpr/get-drvs.cc b/src/libexpr/get-drvs.cc index ba9fbcd6d..bd0ec4781 100644 --- a/src/libexpr/get-drvs.cc +++ b/src/libexpr/get-drvs.cc @@ -60,6 +60,16 @@ MetaInfo DrvInfo::queryMetaInfo(EvalState & state) const } +void DrvInfo::setMetaInfo(const MetaInfo & meta) +{ + ATermMap metaAttrs; + for (MetaInfo::const_iterator i = meta.begin(); i != meta.end(); ++i) + metaAttrs.set(toATerm(i->first), + makeAttrRHS(makeStr(i->second), makeNoPos())); + attrs->set(toATerm("meta"), makeAttrs(metaAttrs)); +} + + /* Cache for already evaluated derivations. Usually putting ATerms in a STL container is unsafe (they're not scanning for GC roots), but here it doesn't matter; everything in this set is reachable from |