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2004-10-27 * Bug fix in parsing of /* ... */ comments; due to longest matchEelco Dolstra1-1/+1
regexp there could be only one such comment per file.
2004-10-27 * Oops, I did it again.Eelco Dolstra1-1/+2
2004-10-27 * Add file to `make dist'.Eelco Dolstra1-1/+1
2004-10-26 * Bug: check that term is an application.Eelco Dolstra1-1/+1
2004-10-26 * Don't use ATmake / ATmatch anymore, nor the ATMatcher class.Eelco Dolstra9-269/+377
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 * Evaluate argument to `import'.Eelco Dolstra1-1/+2
2004-10-26 * Doh!Eelco Dolstra1-1/+1
2004-10-26 * String/path concatenation operator (`+').Eelco Dolstra5-5/+38
2004-10-25 * New language feature: with expressions.Eelco Dolstra5-13/+39
The expression `with E1; E2' evaluates to E2 with all bindings in the attribute set E1 substituted. E.g., with {x = 123;}; x evaluates to 123. That is, the attribute set E1 is in scope in E2. This is particularly useful when importing files containing lots definitions. E.g., instead of let { inherit (import ./foo.nix) a b c d e f; body = ... a ... f ...; } we can now say with import ./foo.nix; ... a ... f ... I.e., we don't have to say what variables should be brought into scope.
2004-10-25 * Allow certain operations to succeed even if we don't have writeEelco Dolstra2-6/+14
permission to the Nix store or database. E.g., `nix-env -qa' will work, but `nix-env -qas' won't (the latter needs DB access). The option `--readonly-mode' forces this mode; otherwise, it's only activated when the database cannot be opened.
2004-09-09 * A very dirty hack to make setuid installations a bit nicer to use.Eelco Dolstra1-0/+2
Previously there was the problem that all files read by nix-env etc. should be reachable and readable by the Nix user. So for instance building a Nix expression in your home directory meant that the home directory should have at least g+x or o+x permission so that the Nix user could reach the Nix expression. Now we just switch back to the original user just prior to reading sources and the like. The places where this happens are somewhat arbitrary, however. Any scope that has a live SwitchToOriginalUser object in it is executed as the original user. * Back out r1385. setreuid() sets the saved uid to the new real/effective uid, which prevents us from switching back to the original uid. setresuid() doesn't have this problem (although the manpage has a bug: specifying -1 for the saved uid doesn't leave it unchanged; an explicit value must be specified).
2004-08-24 * Validate derivation names. In particular don't allow spaces.Eelco Dolstra1-8/+19
* Drop support for the outPath attribute in derivations.
2004-08-04 * Every real language has a `map' function.Eelco Dolstra2-2/+19
2004-08-04 * Allow primops with more that 1 arguments.Eelco Dolstra7-104/+102
2004-04-05 * When something goes wrong in the evaluation of a Nix expression,Eelco Dolstra6-78/+170
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.
2004-04-02 * Print a more useful error message in case of an invalid derivationEelco Dolstra1-1/+6
binding.
2004-03-30 * The recent change in nixpkgs of calling `stdenv.mkDerivation'Eelco Dolstra2-2/+11
instead of `derivation' triggered a huge slowdown in the Nix expression evaluator. Total execution time of `nix-env -qa' went up by a factor of 60 or so. This scalability problem was caused by expressions such as (x: y: ... x ...) a b where `a' is a large term (say, the one in `all-packages-generic.nix'). Then the first beta-reduction would produce (y: ... a ...) b by substituting `a' for `x'. The second beta-reduction would then substitute `b' for `y' into the body `... a ...', which is a large term due to `a', and thus causes a large traversal to be performed by substitute() in the second reduction. This is however entirely redundant, since `a' cannot contain free variables (since we never substitute below a weak head normal form). The solution is to wrap substituted terms into a `Closed' constructor, i.e., subst(subs, Var(x)) = Closed(e) iff subs[x] = e have substitution not descent into closed terms, subst(subs, Closed(x)) = Closed(x) and otherwise ignore them for evaluation, eval(Closed(x)) = eval(x). * Fix a typo that caused incorrect substitutions to be performed in simple lambdas, e.g., `(x: x: x) a' would reduce to `(x: a)'.
2004-03-28 * Added an operator `?' to test for attribute existence, e.g.,Eelco Dolstra2-1/+10
`attrs ? x' yields true iff `attrs' has an attribute named `x'.
2004-03-28 * Added an operator `~' to select paths within a derivation. E.g.,Eelco Dolstra3-0/+16
{stdenv, bash}: derivation { builder = bash ~ /bin/sh; args = ["-e" "-x" ./builder.sh]; ... } Here the attribute `builder' will evaluate to, e.g., `/nix/store/1234abcd...-bash-2.0.1/bin/sh'.
2004-03-28 * Added plain lambdas, e.g., `let { id = x: x; const = x: y: x; }'.Eelco Dolstra5-37/+63
`bla:' is now no longer parsed as a URL. * Re-enabled support for the `args' attribute in derivations to specify command line arguments to the builder, e.g., ... builder = /usr/bin/python; args = ["-c" ./builder.py]; ...
2004-03-19 * `null' is a normal form.Eelco Dolstra1-8/+11
2004-02-19 * Resolve an ambiguity between ifs and attribute selection, e.g., `ifEelco Dolstra1-3/+7
b then x else y.z'.
2004-02-16 * Allow linking against an external Berkeley DB / ATerm library.Eelco Dolstra1-2/+2
2004-02-16 * Inherited attributes in recursive attribute sets are in scope of theEelco Dolstra2-10/+18
non-inherited attributes.
2004-02-04 * Extended the `inherit' syntax to optionally select attributes fromEelco Dolstra2-8/+18
other attribute sets, rather than the current scope. E.g., {inherit (pkgs) gcc binutils;} is equivalent to {gcc = pkgs.gcc; binutils = pkgs.binutils;} I am not so happy about the syntax.
2004-02-04 * An attribute set update operator (//). E.g.,Eelco Dolstra3-0/+19
{x=1; y=2; z=3;} // {y=4;} => {x=1; y=4; z=3;}
2004-02-04 * Use a map to lookup primops.Eelco Dolstra8-38/+121
* 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 Dolstra4-21/+92
2004-02-02 * Added syntactic sugar to the construction of attribute sets toEelco Dolstra6-41/+78
`inherit' variables from the surrounding lexical scope. E.g., {stdenv, libfoo}: derivation { builder = ./bla; inherit stdenv libfoo; xyzzy = 1; } is equivalent to {stdenv, libfoo}: derivation { builder = ./bla; stdenv = stdenv; libfoo = libfoo; xyzzy = 1; } Note that for mutually recursive attribute set definitions (`rec {...}'), this also works, that is, `rec {inherit x;}' is equivalent to `let {fresh = x; body = rec {x = fresh;};}', *not* `rec {x = x}'.
2004-01-30 * Doh!Eelco Dolstra1-1/+3
2004-01-30 * Parser numbers again.Eelco Dolstra3-2/+6
* Include missing files in distributions.
2004-01-30 * Detect flex and bison; updated the manual.Eelco Dolstra1-2/+4
2004-01-30 * Replaced the SDF parser by a substantially faster Bison/FlexEelco Dolstra6-251/+260
parser (roughly 80x faster). The absolutely latest version of Bison (1.875c) is required for reentrant GLR support, as well as a recent version of Flex (say, 2.5.31). Note that most Unix distributions ship with the prehistoric Flex 2.5.4, which doesn't support reentrancy.
2004-01-29 * Optimised the SDF grammar.Eelco Dolstra2-94/+15
2004-01-21 * Fixed a subtle uninitialised variable bug in ATermMaps copied fromEelco Dolstra1-1/+3
ATermMaps. Found thanks to Valgrind!
2004-01-15 * Catch SIGINT to terminate cleanly when the user tries to interruptEelco Dolstra3-0/+8
Nix. This is to prevent Berkeley DB from becoming wedged. Unfortunately it is not possible to throw C++ exceptions from a signal handler. In fact, you can't do much of anything except change variables of type `volatile sig_atomic_t'. So we set an interrupt flag in the signal handler and check it at various strategic locations in the code (by calling checkInterrupt()). Since this is unlikely to cover all cases (e.g., (semi-)infinite loops), sometimes SIGTERM may now be required to kill Nix.
2004-01-15 * Obsolete.Eelco Dolstra2-290/+0
2004-01-05 * Implemented Eelco V.'s `nix-env -I' command to specify the defaultEelco Dolstra1-8/+10
path of the Nix expression to be used with the import, upgrade, and query commands. For instance, $ nix-env -I ~/nixpkgs/pkgs/system/i686-linux.nix $ nix-env --query --available [aka -qa] sylpheed-0.9.7 bison-1.875 pango-1.2.5 subversion-0.35.1 ... $ nix-env -i sylpheed $ nix-env -u subversion There can be only one default at a time. * If the path to a Nix expression is a symlink, follow the symlink prior to resolving relative path references in the expression.
2003-11-25 * More `make dist' fixes.Eelco Dolstra1-1/+2
2003-11-25 * Allow integer bindings in derivations.Eelco Dolstra2-0/+8
2003-11-22 * Maintain integrity of the substitute and successor mappings whenEelco Dolstra3-35/+55
deleting a path in the store. * Allow absolute paths in Nix expressions. * Get nix-prefetch-url to work again. * Various other fixes.
2003-11-21 * Uninstallation.Eelco Dolstra1-5/+11
2003-11-19 * nix-env: a tool to manage user environments.Eelco Dolstra1-0/+2
* Replace all directory reading code by a generic readDirectory() function.
2003-11-19 * Refactoring (step 2).Eelco Dolstra3-126/+4
2003-11-19 * Refactoring: put the Nix expression evaluator in its own library soEelco Dolstra13-0/+1689
that it can be used by multiple programs.