lix/src/libexpr
Eelco Dolstra 451dbf687f * 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
2007-02-02 01:52:42 +00:00
..
attr-path.cc * Cleanup. 2007-01-13 14:21:49 +00:00
attr-path.hh * Use a proper namespace. 2006-09-04 21:06:23 +00:00
common-opts.cc * Option --argstr for passing string arguments easily. (NIX-75) 2007-01-14 12:32:44 +00:00
common-opts.hh * Option --argstr for passing string arguments easily. (NIX-75) 2007-01-14 12:32:44 +00:00
eval.cc * Memoize strict evaluation. 2007-01-13 15:41:54 +00:00
eval.hh * Memoize strict evaluation. 2007-01-13 15:41:54 +00:00
expr-to-xml.cc * printTermAsXML: treat derivations specially; emit an element 2007-01-13 15:11:10 +00:00
expr-to-xml.hh * Big cleanup of the semantics of paths, strings, contexts, string 2006-10-16 15:55:34 +00:00
get-drvs.cc * nix-env now maintains meta info (from the `meta' derivation 2007-02-02 01:52:42 +00:00
get-drvs.hh * nix-env now maintains meta info (from the `meta' derivation 2007-02-02 01:52:42 +00:00
lexer.l * Big cleanup of the semantics of paths, strings, contexts, string 2006-10-16 15:55:34 +00:00
Makefile.am * Option --argstr for passing string arguments easily. (NIX-75) 2007-01-14 12:32:44 +00:00
nix.sdf * Support `++'. 2006-09-11 13:05:15 +00:00
nixexpr-ast.def * Backwards compatibility with old user environment manifests. 2006-10-17 14:01:45 +00:00
nixexpr.cc * nix-env now maintains meta info (from the `meta' derivation 2007-02-02 01:52:42 +00:00
nixexpr.hh * nix-env now maintains meta info (from the `meta' derivation 2007-02-02 01:52:42 +00:00
parser.hh * Use a proper namespace. 2006-09-04 21:06:23 +00:00
parser.y * Handle multiple indirect symlinks when loading a Nix expression. 2007-01-15 14:50:25 +00:00
primops.cc * computeStorePathForText: take the references into account when 2007-01-29 15:51:37 +00:00