lix -

Age	Commit message (Collapse)	Author
2008-02-05	* Regression test.	Eelco Dolstra

2008-01-04	* New primop `unsafeDiscardStringContext' to get rid of string	Eelco Dolstra
	contexts. Needed to prevent unnecessary dependencies when building the NixOS manual.
2007-12-06	* Syntax to escape '', ${.	Eelco Dolstra

2007-11-30	* Added a new kind of multi-line string literal delimited by two	Eelco Dolstra
	single quotes. Example (from NixOS): job = '' start on network-interfaces start script rm -f /var/run/opengl-driver ${if videoDriver == "nvidia" then "ln -sf ${nvidiaDrivers} /var/run/opengl-driver" else if cfg.driSupport then "ln -sf ${mesa} /var/run/opengl-driver" else "" } rm -f /var/log/slim.log end script ''; This style has two big advantages: - \, ' and " aren't special, only '' and ${. So you get a lot less escaping in shell scripts / configuration files in Nixpkgs/NixOS. The delimiter '' is rare in scripts (and can usually be written as ""). ${ is also fairly rare. Other delimiters such as <<...>>, {{...}} and <\|...\|> were also considered but this one appears to have the fewest drawbacks (thanks Martin). - Indentation is intelligently stripped so that multi-line strings can follow the nesting structure of the containing Nix expression. E.g. in the example above 6 spaces are stripped from the start of each line. This prevents unnecessary indentation in generated files (which sometimes even breaks things). See tests/lang/eval-okay-ind-string.nix for some examples.
2007-11-21	* New primop `readFile' to get the contents of a file as a string.	Eelco Dolstra

2007-08-18	primop functions listToAttrs (+test), __isAttrs, __trace added	Marc Weber
	new configuration style proposal in lib/default-unstable.nix
2007-05-15	* Allow empty argument lists in function definitions (e.g., `{}:	Eelco Dolstra
	bla'). Also allow trailing commas (`{x, y,}: ...') as a unintented consequence. Hopefully the reduce/reduce conflict won't cause any problems.
2007-01-29	New primitives:	Eelco Dolstra
	* `sub' to subtract two numbers. * `stringLength' to get the length of a string. * `substring' to get a substring of a string. These should be enough to allow most string operations to be expressed.
2007-01-14	* Option --argstr for passing string arguments easily. (NIX-75)	Eelco Dolstra

2007-01-13	* Canonicalise ASTs in `nix-instantiate --eval': remove position	Eelco Dolstra
	info, sort attribute sets.
2006-12-12	* New built-in function `builtins.attrNames' that returns the	Eelco Dolstra
	names of the attributes in an attribute set.
2006-10-17	* Another test.	Eelco Dolstra

2006-10-17	* Fix the tests wrt the AST changes, i.e., Str(s) -> Str(s, []), and	Eelco Dolstra
	the semantic changes.
2006-10-11	* Removed URIs from the evaluator (NIX-66). They are now just another	Eelco Dolstra
	kind of notation for strings.
2006-10-02	* Finally, a real "let" syntax: `let x = ...; ... z = ...; in ...'.	Eelco Dolstra

2006-09-24	* Primop `toPath' to convert a string to a path.	Eelco Dolstra
	* Primop `pathExists' to check for path existence.
2006-09-24	* Builtin function `getEnv' for getting environment variables.	Eelco Dolstra

2006-09-24	* lessThan primitive for integer comparison.	Eelco Dolstra

2006-09-22	* Builtin function `add' to add integers.	Eelco Dolstra
	* Put common test functions in tests/lang/lib.nix.
2006-09-22	* Added a builtin function `isList' to test whether a value is a list.	Eelco Dolstra
	With this primitive, a list-flattening function can be implemented (NIX-55, example is in tests/lang/eval-okay-flatten.nix).
2006-09-22	* Builtin functions `head' and `tail' to return the head and tail of	Eelco Dolstra
	list. Useful for lots of things, such as implementing a fold function (see NIX-30, example is in tests/lang/eval-okay-list.nix).
2006-09-22	* New builtin functions builtins.{hasAttr, getAttr} to check for	Eelco Dolstra
	attribute existence and to return an attribute from an attribute set, respectively. Example: `hasAttr "foo" {foo = 1;}'. They differ from the `?' and `.' operators in that the attribute name is an arbitrary expression. (NIX-61)
2006-09-01	* Allow "$" in strings as long as they are not followed by "{". (Too	Eelco Dolstra
	bad flex doesn't have lexical restrictions, the current solution isn't quite right...)
2006-08-30	* Okay, that's a bit harder than expected.	Eelco Dolstra

2006-08-30	* TDD: == should do a deep equality test, i.e., it should strictly	Eelco Dolstra
	evaluate its arguments.
2006-08-24	* New primop __toXML (or builtins.toXML) to convert an expression to	Eelco Dolstra
	an XML representation stored in a string. This should be useful to pass structured information to builders.
2006-08-23	* New primop: abort "error message".	Eelco Dolstra

2006-08-23	* A new primop `builtins', which returns an attribute set containing	Eelco Dolstra
	all the primops. This allows Nix expressions to test for new primops and take appropriate action if they're not available. For instance, rather than calling a primop `foo' directly, they could say `if builtins ? foo then builtins.foo ... else ...'.
2006-08-22	* Urgh (see NIX-56).	Eelco Dolstra

2006-08-17	* Test for `nix-instantiate --eval-only --xml'.	Eelco Dolstra

2006-08-16	* Meh.	Eelco Dolstra

2006-08-16	* A test for NIX-53.	Eelco Dolstra

2006-07-24	* New language feature: domain checks, which check whether a function	Eelco Dolstra
	argument has a valid value, i.e., is in a certain domain. E.g., { foo : [true false] , bar : ["a" "b" "c"] }: ... This previously could be done using assertions, but domain checks will allow the buildfarm to automatically extract the configuration space from functions.
2006-07-24	* Tests for domain checks.	Eelco Dolstra

2006-07-24	* Refactoring to support domain checks.	Eelco Dolstra

2006-07-10	* This expression has an undefined variable which isn't detected, so	Eelco Dolstra
	evaluation fails: error: impossible: undefined variable `gcc'
2006-05-08	* Allow function argument default values to refer to other arguments	Eelco Dolstra
	of the function. Implements NIX-45.
2006-05-02	* More tests.	Eelco Dolstra

2006-05-02	* Tests for NIX-45.	Eelco Dolstra

2006-05-01	* String interpolation. Expressions like	Eelco Dolstra
	"--with-freetype2-library=" + freetype + "/lib" can now be written as "--with-freetype2-library=${freetype}/lib" An arbitrary expression can be enclosed within ${...}, not just identifiers. * Escaping in string literals: \n, \r, \t interpreted as in C, any other character following \ is interpreted as-is. * Newlines are now allowed in string literals.
2006-05-01	* Allow string concatenations involving derivations, e.g.,	Eelco Dolstra
	configureFlags = "--with-freetype2-library=" + freetype + "/lib";
2006-03-01	* More test coverage.	Eelco Dolstra

2005-11-17	* "Fix" the test, since we cannot feasibly support the intended semantics.	Eelco Dolstra

2005-11-04	* Scoping bug in `with'.	Eelco Dolstra

2005-07-25	* Added a list concatenation operator:	Eelco Dolstra
	[1 2 3] ++ [4 5 6] => [1 2 3 4 5 6]
2005-05-18	* Added a primop `removeAttrs' to remove attributes from a set, e.g.,	Eelco Dolstra
	`removeAttrs attrs ["x", "y"]' returns the set `attrs' with the attributes named `x' and `y' removed. It is not an error for the named attributes to be missing from the input set.
2005-03-10	* Check for duplicate attributes and formal parameters in Nix	Eelco Dolstra
	expressions.
2004-10-27	* Use `atdiff' instead of `cmp' for checking test output.	Eelco Dolstra
	* Don't use local file names in tests since they will produce different parse trees depending on the current directory.
2004-10-27	* Bug fix in parsing of /* ... */ comments; due to longest match	Eelco Dolstra
	regexp there could be only one such comment per file.
2004-10-27	* Remove ancient Fix tests.	Eelco Dolstra
	* Add automated Nix expression language tests.