~cnx/guix - Personal Guix development branches

Age	Commit message (Collapse)	Author
2008-08-14	* Added an experimental feature suggested by Andres: ellipses ("...")	Eelco Dolstra
	in attribute set pattern matches. This allows defining a function that takes at least the listed attributes, while ignoring additional attributes. For instance, {stdenv, fetchurl, fuse, ...}: stdenv.mkDerivation { ... }; defines a function that requires an attribute set that contains the specified attributes but ignores others. The main advantage is that we can then write in all-packages.nix aefs = import ../bla/aefs pkgs; instead of aefs = import ../bla/aefs { inherit stdenv fetchurl fuse; }; This saves a lot of typing (not to mention not having to update all-packages.nix with purely mechanical changes). It saves as much typing as the "args: with args;" style, but has the advantage that the function arguments are properly declared (not implicit in what the body of the "with" uses).
2008-08-14	* Refactoring: combine functions that take an attribute set and	Eelco Dolstra
	functions that take a single argument (plain lambdas) into one AST node (Function) that contains a Pattern node describing the arguments. Current patterns are single lazy arguments (VarPat) and matching against an attribute set (AttrsPat). This refactoring allows other kinds of patterns to be added easily, such as Haskell-style @-patterns, or list pattern matching.
2007-04-16	* New primop "throw <string>" to throw an error. This is like abort,	Eelco Dolstra
	only thrown errors are caught by the top-level derivation evaluation in nix-env -qa / -i.
2007-02-02	* nix-env now maintains meta info (from the `meta' derivation	Eelco Dolstra
	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
2007-01-13	* Canonicalise ASTs in `nix-instantiate --eval': remove position	Eelco Dolstra
	info, sort attribute sets.
2006-10-16	* Big cleanup of the semantics of paths, strings, contexts, string	Eelco Dolstra
	concatenation and string coercion. This was a big mess (see e.g. NIX-67). Contexts are now folded into strings, so that they don't cause evaluation errors when they're not expected. The semantics of paths has been clarified (see nixexpr-ast.def). toString() and coerceToString() have been merged. Semantic change: paths are now copied to the store when they're in a concatenation (and in most other situations - that's the formalisation of the meaning of a path). So "foo " + ./bla evaluates to "foo /nix/store/hash...-bla", not "foo /path/to/current-dir/bla". This prevents accidental impurities, and is more consistent with the treatment of derivation outputs, e.g., `"foo " + bla' where `bla' is a derivation. (Here `bla' would be replaced by the output path of `bla'.)
2006-09-20	* Shut up a warning.	Eelco Dolstra

2006-09-04	* Remove unnecessary inclusions of aterm2.h.	Eelco Dolstra

2006-09-04	* Use a proper namespace.	Eelco Dolstra
	* Optimise header file usage a bit. * Compile the parser as C++.
2006-08-23	* New primop: abort "error message".	Eelco Dolstra

2006-08-04	* Fix a few warnings.	Eelco Dolstra

2006-07-28	* `nix-instantiate --print-args': print out the valid values for	Eelco Dolstra
	functions arguments that have a domain.
2006-07-24	* Refactoring to support domain checks.	Eelco Dolstra

2006-07-19	* Better error messages (especially wrt types).	Eelco Dolstra

2006-05-04	* Use the new ATermMap.	Eelco Dolstra

2006-05-02	* Use a linked list of substitutions. This reduces the amount of	Eelco Dolstra
	copying.
2006-03-06	* GCC 4.1 compatibility.	Eelco Dolstra

2005-05-08	* ATermMap needs an assignment operator, otherwise we are screwed.	Eelco Dolstra

2005-04-10	* Primop `__currentSystem' to return the current platform identifier.	Eelco Dolstra

2004-10-26	* Don't use ATmake / ATmatch anymore, nor the ATMatcher class.	Eelco Dolstra
	Instead we generate data bindings (build and match functions) for the constructors specified in `constructors.def'. In particular this removes the conversions between AFuns and strings, and Nix expression evaluation now seems 3 to 4 times faster.
2004-10-26	* String/path concatenation operator (`+').	Eelco Dolstra

2004-08-04	* Allow primops with more that 1 arguments.	Eelco Dolstra

2004-04-05	* When something goes wrong in the evaluation of a Nix expression,	Eelco Dolstra
	print a nice backtrace of the stack, rather than vomiting a gigantic (and useless) aterm on the screen. Example: error: while evaluating file `.../pkgs/system/test.nix': while evaluating attribute `subversion' at `.../pkgs/system/all-packages-generic.nix', line 533: while evaluating function at `.../pkgs/applications/version-management/subversion/default.nix', line 1: assertion failed at `.../pkgs/applications/version-management/subversion/default.nix', line 13 Since the Nix expression language is lazy, the trace may be misleading. The purpose is to provide a hint as to the location of the problem.
2004-02-04	* Use a map to lookup primops.	Eelco Dolstra
	* Various performance improvements in the evaluator. * Do not link against unused (and missing!) libraries (-lsglr, etc.).
2004-02-03	* Verify that all variables in a Nix expression are defined.	Eelco Dolstra

2003-11-19	* Refactoring: put the Nix expression evaluator in its own library so	Eelco Dolstra
	that it can be used by multiple programs.