nixpkgs/pkgs/lib/debug.nix

let lib = import ./default.nix; in

rec {


  # Wrapper aroung the primop `addErrorContext', which shouldn't used
  # directly.  It evaluates and returns `val', but if an evaluation
  # error occurs, the text in `msg' is added to the error context
  # (stack trace) printed by Nix.
  addErrorContext =
    if builtins ? addErrorContext
    then builtins.addErrorContext
    else msg: val: val;

  addErrorContextToAttrs = lib.mapAttrs (a : v : lib.addErrorContext "while evaluating ${a}" v);


}
add error context to all top level attr names of all-packages.nix svn path=/nixpkgs/trunk/; revision=14429 2009-03-06 23:21:31 +00:00			`let lib = import ./default.nix; in`

* Split lib/default.nix into several files, as it had become a big mess. Also cleaned up some functions: - foldl appeared broken (it recursively called fold). - Renamed logicalAND/logicalOR to and/or. - Removed listOfListsToAttrs, eqStrings: obsolete. - Removed isInList, which does the same thing as elem. - stringToCharacters: don't return a "" at the end of the list. - Renamed concatList to concat, as concatList (singular) is a misnomer: it takes two lists. Likewise, renamed mergeAttr to mergeAttrs. misc.nix still contains a lot of stuff that should be refactored and moved to other files. svn path=/nixpkgs/trunk/; revision=14013 2009-02-09 16:51:03 +00:00			`rec {`


			# Wrapper aroung the primop `addErrorContext', which shouldn't used
			# directly. It evaluates and returns `val', but if an evaluation
			# error occurs, the text in `msg' is added to the error context
			`# (stack trace) printed by Nix.`
			`addErrorContext =`
			`if builtins ? addErrorContext`
			`then builtins.addErrorContext`
			`else msg: val: val;`

add error context to all top level attr names of all-packages.nix svn path=/nixpkgs/trunk/; revision=14429 2009-03-06 23:21:31 +00:00			`addErrorContextToAttrs = lib.mapAttrs (a : v : lib.addErrorContext "while evaluating ${a}" v);`
* Split lib/default.nix into several files, as it had become a big mess. Also cleaned up some functions: - foldl appeared broken (it recursively called fold). - Renamed logicalAND/logicalOR to and/or. - Removed listOfListsToAttrs, eqStrings: obsolete. - Removed isInList, which does the same thing as elem. - stringToCharacters: don't return a "" at the end of the list. - Renamed concatList to concat, as concatList (singular) is a misnomer: it takes two lists. Likewise, renamed mergeAttr to mergeAttrs. misc.nix still contains a lot of stuff that should be refactored and moved to other files. svn path=/nixpkgs/trunk/; revision=14013 2009-02-09 16:51:03 +00:00

			`}`