Commit graph

1837 commits

Author SHA1 Message Date
Eelco Dolstra
e0b7fb8f27 * Keep attribute sets in sorted order to speed up attribute lookups.
* Simplify the representation of attributes in the AST.
* Change the behaviour of listToAttrs() in case of duplicate names.
2010-10-24 19:52:33 +00:00
Eelco Dolstra
2dc6d50941 * Don't create thunks for variable lookups (if possible). This
significantly reduces the number of values allocated (e.g. from 8.7m
  to 4.9m for the Bittorrent test).
2010-10-24 14:20:02 +00:00
Eelco Dolstra
0b305c534f * Store attribute sets as a vector instead of a map (i.e. a red-black
tree).  This saves a lot of memory.  The vector should be sorted so
  that names can be looked up using binary search, but this is not the
  case yet.  (Surprisingly, looking up attributes using linear search
  doesn't have a big impact on performance.)

  Memory consumption for

    $ nix-instantiate /etc/nixos/nixos/tests -A bittorrent.test --readonly-mode

  on x86_64-linux with GC enabled is now 185 MiB (compared to 946
  MiB on the trunk).
2010-10-24 00:41:29 +00:00
Eelco Dolstra
a247d20604 * Fix compiling without Boehm.
* Fix the stats.
2010-10-23 22:58:24 +00:00
Eelco Dolstra
b2ba62170c * Optimise string constants by putting them in the symbol table. 2010-10-23 21:11:59 +00:00
Eelco Dolstra
8ac06726b9 * Make Value smaller by not storing redundant PrimOp info.
* Clear pointers in Values after overwriting them to make sure that no
  objects are kept alive unnecessarily.
2010-10-23 20:07:47 +00:00
Eelco Dolstra
3f66cfb96b * Remove allocValues(). 2010-10-23 18:18:07 +00:00
Eelco Dolstra
4dee289550 * In environments, store pointers to values rather than values. This
improves GC effectiveness a bit more (because a live value doesn't
  keep other values in the environment plus the parent environments
  alive), and removes the need for copy nodes.
2010-10-22 15:51:52 +00:00
Eelco Dolstra
41c45a9b31 * Store Value nodes outside of attribute sets. I.e., Attr now stores
a pointer to a Value, rather than the Value directly.  This improves
  the effectiveness of garbage collection a lot: if the Value is
  stored inside the set directly, then any live pointer to the Value
  causes all other attributes in the set to be live as well.
2010-10-22 14:47:42 +00:00
Eelco Dolstra
64c3325b0b * Make building against the Boehm GC a configure option. 2010-10-22 13:39:15 +00:00
Eelco Dolstra
76feaf016a * Keep some more stats. 2010-10-20 15:48:00 +00:00
Eelco Dolstra
e879a0371b * Use the Boehm garbage collector to reclaim unused memory in the Nix
expression evaluator.
2010-10-20 11:38:30 +00:00
Eelco Dolstra
705868a8a9 * Make sure that config.h is included before the system headers,
because it defines _FILE_OFFSET_BITS.  Without this, on 
  OpenSolaris the system headers define it to be 32, and then 
  the 32-bit stat() ends up being called with a 64-bit "struct 
  stat", or vice versa.

  This also ensures that we get 64-bit file sizes everywhere.

* Remove the redundant call to stat() in parseExprFromFile().
  The file cannot be a symlink because that's the exit condition
  of the loop before.
2010-10-04 17:55:38 +00:00
Eelco Dolstra
95f4f2cf61 * If std::tr1::unordered_set is unavailable, use std::set. 2010-10-04 16:16:19 +00:00
Eelco Dolstra
4aa9245083 * Hack needed for GCC 4.3.2 on OpenSolaris. 2010-10-04 10:51:16 +00:00
Eelco Dolstra
df50916e46 * Oops - "null" was displayed as "true". 2010-08-27 12:10:56 +00:00
Eelco Dolstra
6d6200f37a * Optimisation in the // operator: if one of the sets is empty, return
the other set.
2010-08-02 16:31:05 +00:00
Eelco Dolstra
7af6a2fd71 * intersectAttrs: optimise for the case where the second set is larger
than the first set.  (That's usually the case with callPackage.)
2010-08-02 11:54:44 +00:00
Eelco Dolstra
f16fe2af8d * builtins.toXML: propagate the string context. This is a regression
from the old ATerm-based evaluator.
2010-06-10 10:29:50 +00:00
Eelco Dolstra
1ab67cf437 2010-06-02 09:43:04 +00:00
Eelco Dolstra
89865da76d * Turn build errors during evaluation into EvalErrors. 2010-06-01 11:19:32 +00:00
Eelco Dolstra
93cd5a4a13 * The << operator on values should be const. 2010-05-18 10:36:37 +00:00
Eelco Dolstra
b2235d81d1 * Restore the __overrides feature that was lost somewhere in the
fast-eval branch.
2010-05-15 08:10:12 +00:00
Eelco Dolstra
bd25ac2260 * Print attributes in sorted order. 2010-05-12 12:15:49 +00:00
Eelco Dolstra
81a4b4e49b * Implemented tryEval, the last missing primop in the fast-eval
branch.  Also added a test for tryEval.
2010-05-12 11:23:44 +00:00
Eelco Dolstra
1a8eb6e3ec 2010-05-07 15:26:33 +00:00
Eelco Dolstra
83dfa89870 * Sync with the trunk. 2010-05-07 14:46:47 +00:00
Eelco Dolstra
01e58adce0 * Store position info for inherited attributes. 2010-05-07 12:43:57 +00:00
Eelco Dolstra
83d7b89660 * Updated addErrorContext. 2010-05-07 12:33:14 +00:00
Eelco Dolstra
e2d5e40f4f * Keep track of the source positions of attributes. 2010-05-07 12:11:05 +00:00
Eelco Dolstra
84ce7ac76f * Store attribute positions in the AST and report duplicate attribute
errors with position info.
* For all positions, use the position of the first character of the
  first token, rather than the last character of the first token plus
  one.
2010-05-06 16:46:48 +00:00
Eelco Dolstra
2be6118f4c * Don't need the test program anymore. 2010-04-23 09:09:32 +00:00
Eelco Dolstra
0bc468f195 * Simplify the implementation of `with'. This gives a 7% speedup in
evaluating the NixOS system configuration.
2010-04-22 15:08:09 +00:00
Eelco Dolstra
ebade9ff8b * Check for duplicate attribute names / function arguments. `make
check' now succeeds :-)
* An attribute set such as `{ foo = { enable = true; };
  foo.port = 23; }' now parses.  It was previously rejected, but I'm
  too lazy to implement the check.  (The only reason to reject it is
  that the reverse, `{ foo.port = 23; foo = { enable = true; }; }', is
  rejected, which is kind of ugly.)
2010-04-22 11:02:24 +00:00
Eelco Dolstra
2d7636529f * String equality tests should take the context into account. All the
evaluation test cases now succeed.
2010-04-22 09:54:11 +00:00
Eelco Dolstra
6f0f16497a * Fix the interpretation of ''\<character> in indented strings. 2010-04-21 16:18:27 +00:00
Eelco Dolstra
0777448ca6 * Fixed builtins.genericClosure. 2010-04-21 15:57:11 +00:00
Eelco Dolstra
fe2d869e04 * Store user environment manifests as a Nix expression in
$out/manifest.nix rather than as an ATerm.

  (Hm, I thought I committed this two days ago...)
2010-04-21 15:08:58 +00:00
Eelco Dolstra
f3b8833a48 * Drop the dependency on the ATerm library. 2010-04-19 14:51:58 +00:00
Eelco Dolstra
efc7a579e8 * Don't use the ATerm library for parsing/printing .drv files. 2010-04-19 13:46:58 +00:00
Eelco Dolstra
55b5ddd3ca * Added parsing of manifests in ATerm format. 2010-04-19 12:10:04 +00:00
Eelco Dolstra
5c31995bb8 * Updated some more primops. 2010-04-16 15:13:47 +00:00
Eelco Dolstra
8ca4a001cb * Improve sharing a bit. 2010-04-16 14:03:26 +00:00
Eelco Dolstra
497e4ad126 * Remove some redundant tests. 2010-04-16 13:51:01 +00:00
Eelco Dolstra
02c1dac909 * In an nested with' where the inner with is a variable (with ...;
with someVar; ...'), the contents of the variable would be
  clobbered.  (The attributes in the outer `with' were added to the
  variable.)
2010-04-16 13:44:02 +00:00
Eelco Dolstra
04c4bd3624 * Store lists as lists of pointers to values rather than as lists of
values.  This improves sharing and gives another speed up.
  Evaluation of the NixOS system attribute is now almost 7 times
  faster than the old evaluator.
2010-04-15 00:37:36 +00:00
Eelco Dolstra
e41b5828db * Better stats. 2010-04-14 23:48:46 +00:00
Eelco Dolstra
d39d3c6264 * Implemented inherit. 2010-04-14 23:25:05 +00:00
Eelco Dolstra
267dc693d2 * Fix builtins. 2010-04-14 22:59:39 +00:00
Eelco Dolstra
81de12bc8f * Refactoring: move variable uses to a separate class. 2010-04-14 15:14:23 +00:00
Eelco Dolstra
110d155778 * Implemented withs. 2010-04-14 15:01:04 +00:00
Eelco Dolstra
9985230c00 * After parsing, compute level/displacement pairs for each variable
use site, allowing environments to be stores as vectors of values
  rather than maps.  This should speed up evaluation and reduce the
  number of allocations.
2010-04-14 14:42:32 +00:00
Eelco Dolstra
816dd3f061 * Remove more obsolete code. 2010-04-14 12:49:05 +00:00
Eelco Dolstra
85d13c8f93 * Change the semantics of "with" so that inner "withs" take
precedence, i.e. `with {x=1;}; with {x=2;}; x' evaluates to 2'.
  This has a simpler implementation and seems more natural.  There
  doesn't seem to be any code in Nixpkgs or NixOS that relies on the
  old behaviour.
2010-04-14 08:37:08 +00:00
Eelco Dolstra
816f9c0f6f * Use std::tr1::unordered_set instead of std::set for the symbol
table.  This gives a 10% speed increase on `nix-instantiate
  /etc/nixos/nixos -A system --readonly-mode'.
2010-04-13 14:34:11 +00:00
Eelco Dolstra
7d47498b5e * Evaluate lets directly (i.e. without desugaring to `rec { attrs...;
<let-body> = e; }.<let-body>).  This prevents the unnecessary
  allocation of an attribute set.
2010-04-13 13:42:25 +00:00
Eelco Dolstra
ac1e8f40d4 * Use a symbol table to represent identifiers and attribute names
efficiently.  The symbol table ensures that there is only one copy
  of each symbol, thus allowing symbols to be compared efficiently
  using a pointer equality test.
2010-04-13 12:25:42 +00:00
Eelco Dolstra
10e8b1fd15 * Finished the ATerm-less parser. 2010-04-12 23:33:23 +00:00
Eelco Dolstra
d4f0b0fc6c * Indented strings. 2010-04-12 22:03:27 +00:00
Eelco Dolstra
a60317f20f * More missing constructs. 2010-04-12 21:21:24 +00:00
Eelco Dolstra
4d6ad5be17 * Don't use ATerms for the abstract syntax trees anymore. Not
finished yet.
2010-04-12 18:30:11 +00:00
Eelco Dolstra
ed711f73bc * Don't use ATerms to represent integers in the lexer. 2010-04-12 10:38:18 +00:00
Eelco Dolstra
db90b88e65 * Hack to support builderDefs expressions. 2010-04-12 09:50:20 +00:00
Eelco Dolstra
4e49002576 * Doh. 2010-04-12 09:45:00 +00:00
Eelco Dolstra
c3f228f296 2010-04-12 09:14:27 +00:00
Ludovic Courtès
aac5fcfbb5 Re-add drvPath' and outPath' attributes to <derivation> XML nodes.
This fixes a regression introduced in r20882 ("Add source location
information to the XML output.").

* src/libexpr/expr-to-xml.cc (nix::printTermAsXML): Dereference the
  attribute RHS from "drvPath" and "outPath".
2010-04-09 21:30:55 +00:00
Eelco Dolstra
f3dc7ab877 * Keep more statistics about stack space usage.
* Reduce stack space usage.
2010-04-09 12:00:49 +00:00
Eelco Dolstra
b7b3dd55f9 * Remove a lot of dead code. 2010-04-08 11:41:19 +00:00
Eelco Dolstra
7e048eddf5 * Fix blackholing. If evaluation fails due to an assertion failure,
then the blackhole has to be removed to ensure that repeated
  evaluation of the same value gives an assertion failure again rather
  than an "infinite recursion" error.
2010-04-08 11:25:14 +00:00
Eelco Dolstra
af2a372bb0 * Update autoCallFunction() and findAlongAttrPath(). 2010-04-07 15:47:06 +00:00
Eelco Dolstra
9a64454faa * expr-to-xml -> value-to-xml. 2010-04-07 13:59:45 +00:00
Eelco Dolstra
fc92244ba8 * Implemented the primops necessary for generating the NixOS manual. 2010-04-07 13:55:46 +00:00
Eelco Dolstra
a353aef0b1 * In eval(), don't use the target value `v' as a temporary.
Overwriting `v' breaks when the expression evaluation to an
  assertion failure or throw.
2010-04-06 14:15:29 +00:00
Eelco Dolstra
a5ece7d016 * Removed the `~' operator. 2010-04-01 16:59:07 +00:00
Eelco Dolstra
c172274e17 * Quick hack to make coerceToString work more or less correctly on
nested lists.  `nix-instantiate' can now evaluate the NixOS system
  derivation attribute correctly (in 2.1s on my laptop vs. 6.2s for
  the trunk).
2010-04-01 14:35:03 +00:00
Eelco Dolstra
7b851915bf * Improve sharing. 2010-04-01 12:04:57 +00:00
Eelco Dolstra
95cc417d76 * Functions are incomparable. 2010-04-01 10:55:36 +00:00
Eelco Dolstra
71f026292b * Make `derivation' lazy again for performance. It also turns out
that there are some places in Nixpkgs (php_configurable /
  composableDerivation, it seems) that call `derivation' with
  incorrect arguments (namely, the `name' attribute missing) but get
  away with it because of laziness.
2010-04-01 09:55:57 +00:00
Eelco Dolstra
dc31305b38 * Fixed the trace primop and path comparison.
* Removed exprToString and stringToExpr because there is no ATerm
  representation to work on anymore (and exposing the internals of the
  evaluator like this is not a good idea anyway).
2010-03-31 20:09:20 +00:00
Eelco Dolstra
979f163615 * Handle string contexts. `nix-instantiate' can now correctly compute
the `firefoxWrapper' attribute in Nixpkgs, and it's about 3 times
  faster than the trunk :-)
2010-03-31 19:52:29 +00:00
Eelco Dolstra
d8cd3115d8 * Get nix-env to compile. 2010-03-31 19:12:08 +00:00
Eelco Dolstra
55e207b2dc * Cache parse trees to prevent repeated parsing of imported Nix
expressions.
2010-03-31 16:14:32 +00:00
Eelco Dolstra
3d94be61ea * Implemented derivations. 2010-03-31 15:38:03 +00:00
Ludovic Courtès
09381cccff Make source location info in the XML output optional.
* src/libexpr/expr-to-xml.cc (nix::showAttrs): Add `location'
  parameter.  Provide location XML attributes when it's true.  Update
  callers.
  (nix::printTermAsXML): Likewise.

* src/libexpr/expr-to-xml.hh (nix::printTermAsXML): Update prototype;
  have `location' default to `false'.

* src/nix-instantiate/nix-instantiate.cc (printResult, processExpr): Add
  `location' parameter; update callers.
  (run): Add support for `--no-location'.

* src/nix-instantiate/help.txt: Update accordingly.

* tests/lang.sh: Invoke `nix-instantiate' with `--no-location' for the
  XML tests.

* tests/lang/eval-okay-toxml.exp, tests/lang/eval-okay-to-xml.nix: New
  files.
2010-03-31 12:38:31 +00:00
Eelco Dolstra
13c2adc897 * Implemented `rec { inherit ...; }'. 2010-03-31 11:05:39 +00:00
Eelco Dolstra
4c53ca2692 * Compare nulls. 2010-03-31 09:54:12 +00:00
Ludovic Courtès
471419d1fa Add source location information to the XML output.
* src/libexpr/expr-to-xml.cc (nix::showAttrs): Dereference the attribute
  RHS.  Add "path", "line", and "column" XML attributes to the node when
  source location information is available.
  (nix::printTermAsXML): Likewise for functions.
2010-03-31 08:29:05 +00:00
Eelco Dolstra
7f19e03c65 * More primops. 2010-03-30 22:39:48 +00:00
Eelco Dolstra
47df476daa * More operators / primops. 2010-03-30 18:05:54 +00:00
Eelco Dolstra
c9170be2bd * More primops. 2010-03-30 15:18:20 +00:00
Eelco Dolstra
c3aa615a5f * More primops. 2010-03-30 14:39:27 +00:00
Eelco Dolstra
5b72d8a749 * Implemented `map'. 2010-03-30 13:47:59 +00:00
Eelco Dolstra
d78a05ab40 * Make `import' work. 2010-03-30 09:22:33 +00:00
Eelco Dolstra
31428c3a06 * Started integrating the new evaluator. 2010-03-29 14:37:56 +00:00
Eelco Dolstra
52090d2418 2010-03-29 10:13:51 +00:00
Eelco Dolstra
e3f32ac5af 2010-03-29 09:43:55 +00:00
Eelco Dolstra
807a67bc74 2010-03-29 09:43:39 +00:00
Eelco Dolstra
392811eb8f * Strings. 2010-03-28 18:27:07 +00:00
Eelco Dolstra
d96cdcea6b 2010-03-28 16:57:16 +00:00
Eelco Dolstra
3d2b835f30 * Implemented multi-argument primops. 2010-03-28 16:37:39 +00:00
Eelco Dolstra
45d822f29c * Primops (not yet finished). 2010-03-26 15:45:53 +00:00
Eelco Dolstra
cad8726b2c * Implemented the ==' and !=' operators. These now use a deep
equality test, so they also work for (finite) attribute sets and
  lists.
2010-03-26 13:27:26 +00:00
Eelco Dolstra
8da118e4d0 * Measure stack usage. 2010-03-25 16:35:24 +00:00
Eelco Dolstra
c2ba4313fb * Implemented lists. 2010-03-25 15:38:37 +00:00
Eelco Dolstra
25eedf085d * Quick and dirty implementation of with'. with e1; e2' is
basically desugared to `let <with> = e1; e2', and `lookupVar' looks
  in each <with> in the environment chain for an attribute with the
  specified name.
2010-03-25 14:51:04 +00:00
Eelco Dolstra
3c9f8fc9b6 * Don't convert variable names to strings. 2010-03-25 13:10:04 +00:00
Eelco Dolstra
f450384ded * Implement blackholing. 2010-03-25 12:51:14 +00:00
Eelco Dolstra
ef8bd919fc * Implement `...' and default function arguments. 2010-03-25 12:45:23 +00:00
Eelco Dolstra
8a10360c91 * Simplify @-patterns: only {attrs}@name' or name@{attrs}' are now
allowed.  So `name1@name2', `{attrs1}@{attrs2}' and so on are now no
  longer legal.  This is no big loss because they were not useful
  anyway.

  This also changes the output of builtins.toXML for @-patterns
  slightly.
2010-03-25 12:19:41 +00:00
Eelco Dolstra
7482349fe8 * Implemented attribute set pattern matches. 2010-03-24 23:40:00 +00:00
Eelco Dolstra
0fd3648d34 * Store values in environments. 2010-03-24 12:41:08 +00:00
Eelco Dolstra
b70bd8fe56 * Reduce the number of value allocations in eval() by moving
responsibility for allocation of the result to the caller.
2010-03-24 12:11:38 +00:00
Eelco Dolstra
d31c59eb17 * Plain lambdas. 2010-03-24 11:06:05 +00:00
Eelco Dolstra
0910ae9568 * Start of an evaluator that uses call-by-need (with thunk updating)
instead of (memoised) call-by-name.
2010-03-23 17:30:50 +00:00
Nicolas Pierron
741b7577c1 Merge r20344 & r20346. 2010-03-14 11:58:07 +00:00
Eelco Dolstra
327a232c85 * Remove support for old (before Nix 0.12pre12020) databases. 2009-11-06 01:15:44 +00:00
Eelco Dolstra
deb342fb08 * builtins.trace: in the common case that the value is a string, then
show the string, not the ATerm, so we get `trace: bla' instead of
  `trace: Str("bla",[])'.
2009-10-22 08:10:12 +00:00
Eelco Dolstra
437077c39d * Added a primop unsafeDiscardOutputDependency needed by Disnix to
pass derivation paths to a builder without actually building them.
2009-10-21 15:05:30 +00:00
Eelco Dolstra
1332dd1ed3 * tryEval shouldn't catch all exceptions of type Error, since not all
of them leave the evaluator in a continuable state.  Also, it should
  be less chatty.
2009-09-23 19:19:26 +00:00
Eelco Dolstra
0dbd4638e0 * Two primops: builtins.intersectAttrs and builtins.functionArgs.
intersectAttrs returns the (right-biased) intersection between two
  attribute sets, e.g. every attribute from the second set that also
  exists in the first.  functionArgs returns the set of attributes
  expected by a function.

  The main goal of these is to allow the elimination of most of
  all-packages.nix.  Most package instantiations in all-packages.nix
  have this form:

    foo = import ./foo.nix {
      inherit a b c;
    };

  With intersectAttrs and functionArgs, this can be written as:

    foo = callPackage (import ./foo.nix) { };

  where

   callPackage = f: args:
     f ((builtins.intersectAttrs (builtins.functionArgs f) pkgs) // args);

  I.e., foo.nix is called with all attributes from "pkgs" that it
  actually needs (e.g., pkgs.a, pkgs.b and pkgs.c).  (callPackage can
  do any other generic package-level stuff we might want, such as
  applying makeOverridable.)  Of course, the automatically supplied
  arguments can be overriden if needed, e.g.

    foo = callPackage (import ./foo.nix) {
      c = c_version_2;
    };

  but for the vast majority of packages, this won't be needed.

  The advantages are to reduce the amount of typing needed to add a
  dependency (from three sites to two), and to reduce the number of
  trivial commits to all-packages.nix.  For the former, there have
  been two previous attempts:

    - Use "args: with args;" in the package's function definition.
      This however obscures the actual expected arguments of a
      function, which is very bad.

    - Use "{ arg1, arg2, ... }:" in the package's function definition
      (i.e. use the ellipis "..." to allow arbitrary additional
      arguments), and then call the function with all of "pkgs" as an
      argument.  But this inhibits error detection if you call it with
      an misspelled (or obsolete) argument.
2009-09-15 13:01:46 +00:00
Michael Raskin
3bca8931e8 Adding tryEval builtin. It allows to catch presence of errors in an expression. 2009-08-25 16:06:46 +00:00
Eelco Dolstra
749dd97a54 * Support integers and lists of strings in meta fields. This is
useful for fields like meta.maintainers, meta.priority (which can be
  a proper integer now) and even meta.license (if there are multiple
  licenses).
2009-06-30 15:53:39 +00:00
Eelco Dolstra
f2c3fc5191 * Don't show trace information by default (`--show-trace' to enable).
NixOS evaluation errors in particular look intimidating and
  generally aren't very useful.  Ideally the builtins.throw messages
  should be self-contained.
2009-06-30 13:28:29 +00:00
Eelco Dolstra
a64bbe049e * Change the scoping of "inherit (e) ..." in recs so that the
attributes of the rec are in scope of `e'.  This is useful in
  expressions such as

    rec {
      lib = import ./lib;
      inherit (lib) concatStrings;
    }

  It does change the semantics of expressions such as

    let x = {y = 1;}; in rec { x = {y = 2;}; inherit (x) y; }.y

  This now returns 2 instead of 1.  However, no code in Nixpkgs or
  NixOS seems to rely on the old behaviour.
2009-05-15 13:46:13 +00:00
Eelco Dolstra
d407d572fd * Some syntactic sugar for attribute sets: allow {x.y.z = ...;} as a
shorthand for {x = {y = {z = ...;};};}.  This is especially useful
  for NixOS configuration files, e.g.

    {
      services = {
        sshd = {
          enable = true;
          port = 2022;
        };
      };
    }

  can now be written as

    {
      services.sshd.enable = true;
      services.sshd.port = 2022;
    }

  However, it is currently not permitted to write
  
    {
      services.sshd = {enable = true;};
      services.sshd.port = 2022;
    }

  as this is considered a duplicate definition of `services.sshd'.
2009-05-15 12:35:23 +00:00
Eelco Dolstra
e42975490f * Check for duplicate attributes in fixAttrs, rather than doing a
separate traversal after parsing.  Likewise, check for duplicate
  pattern variables right away.
2009-05-14 14:29:45 +00:00
Eelco Dolstra
50d11b90ca * Allow unsafe (unspecified) comparisons between attrsets unless
NIX_NO_UNSAFE_EQ is set, for now.
2009-05-12 11:06:24 +00:00
Eelco Dolstra
c34e6d71bc * Disallow equality tests between attribute sets. This was always
broken, but now the evaluator checks for it to prevent Nix
  expressions from relying on undefined behaviour.  Equality tests are
  implemented using a shallow pointer equality test between ATerms.
  However, because attribute sets are lazy and contain position
  information, this can give false positives.  For instance,
  previously

    let y = {x = 1;}; in y == y

  evaluated to true, while the equivalent expression

    {x = 1;} == {x = 1;}

  evaluated to false.  So disallow these tests for now.  (Eventually
  we may want to implement deep equality tests for attribute sets,
  like lib.eqStrict.)
  
* Idem: disallow comparisons between functions.

* Implemented deep comparisons of lists.  This had the same problem as
  attribute sets - the elements in the list weren't evaluated.  For
  instance,

    ["xy"] == [("x" + "y")]

  evaluated to false.  Now it works properly.
2009-05-11 15:50:14 +00:00
Eelco Dolstra
7660e2a068 * Remove a right recursion that causes the parser to barf on very long
lists.  The comment about ATreverse requiring unbounded stack space
  was unfounded anyway.
2009-05-07 11:35:52 +00:00
Eelco Dolstra
4e646b0ddb * Fix a few "comparison is always false/true due to limited range of
data type" warnings on 64-bit platforms.  The one in parser.y is
  likely to be a real bug.
2009-04-16 12:03:17 +00:00
Eelco Dolstra
2897286487 * Unify exportReferencesGraph and exportBuildReferencesGraph, and make
sure that it works as expected when you pass it a derivation.  That
  is, we have to make sure that all build-time dependencies are built,
  and that they are all in the input closure (otherwise remote builds
  might fail, for example).  This is ensured at instantiation time by
  adding all derivations and their sources to inputDrvs and inputSrcs.
2009-03-18 17:36:42 +00:00
Eelco Dolstra
d4753c944f 2009-03-06 11:01:45 +00:00
Marc Weber
1407a1ec99 added primop functions __isBool, __isString, __isInt 2009-02-05 19:35:40 +00:00
Nicolas Pierron
110606d470 Add the "addErrorContext" builtin to add more information in the stack trace. 2009-01-27 14:36:44 +00:00
Eelco Dolstra
8e39d9bdb3 * Make Nix build with Bison 2.4. 2009-01-12 12:51:28 +00:00
Eelco Dolstra
63b8f09d8d 2008-12-04 10:45:47 +00:00
Eelco Dolstra
f8713e1287 * Dirty hack to make nix-push work properly on derivations: the
derivation should be a source rather than a derivation dependency of
  the call to the NAR derivation.  Otherwise the derivation (and all
  its dependencies) will be built as a side-effect, which may not even
  succeed.
2008-12-04 10:40:41 +00:00
Eelco Dolstra
ff762fb499 * Pass HashType values instead of strings. 2008-12-03 16:10:17 +00:00
Eelco Dolstra
1307b22223 * Made addToStore() a lot more efficient: it no longer reads the path
being copied 3 times in the worst case.  It doesn't run in constant space,
  but it didn't do that anyway.
2008-12-03 15:51:17 +00:00
Eelco Dolstra
64519cfd65 * Unify the treatment of sources copied to the store, and recursive
SHA-256 outputs of fixed-output derivations.  I.e. they now produce
  the same store path:

  $ nix-store --add x
  /nix/store/j2fq9qxvvxgqymvpszhs773ncci45xsj-x

  $ nix-store --add-fixed --recursive sha256 x
  /nix/store/j2fq9qxvvxgqymvpszhs773ncci45xsj-x

  the latter being the same as the path that a derivation

    derivation {
      name = "x";
      outputHashAlgo = "sha256";
      outputHashMode = "recursive";
      outputHash = "...";
      ...
    };

  produces.

  This does change the output path for such fixed-output derivations.
  Fortunately they are quite rare.  The most common use is fetchsvn
  calls with SHA-256 hashes.  (There are a handful of those is
  Nixpkgs, mostly unstable development packages.)
  
* Documented the computation of store paths (in store-api.cc).
2008-12-03 15:06:30 +00:00
Eelco Dolstra
aab530e971 * Primop builtins.storePath for declaring a store path as a
dependency.  `storePath /nix/store/bla' gives exactly the same
  result as `toPath /nix/store/bla', except that the former includes
  /nix/store/bla in the dependency context of the string.

  Useful in some generated Nix expressions like nix-push, which now
  finally does the right thing wrt distributed builds.  (Previously
  the path to be packed wasn't an explicit dependency, so it wouldn't
  be copied to the remote machine.)
2008-11-19 23:26:19 +00:00
Eelco Dolstra
99dc3e613a * Require that __overrides is defined as a non-recursive attribute
(which means it can only be defined via "inherit"), otherwise we get
  scoping bugs, since __overrides can't be recursive (or at least, it
  would be hard).
2008-08-26 14:05:59 +00:00
Eelco Dolstra
abec1c0004 * Evaluate attributes in sorted order for better determinism. 2008-08-25 14:31:29 +00:00
Eelco Dolstra
c4f1c2114b * Minor simplification. 2008-08-25 14:15:56 +00:00
Michael Raskin
b7ff182b6e Fixing an obvious typo in override code. I do not know whether it works correctly after the change, but at least it ca nbe compiled now. 2008-08-14 22:01:43 +00:00
Eelco Dolstra
ca07f3e370 * Another experimental feature: a way to truly override attributes in
a rec.  This will be very useful to allow end-user customisation of
  all-packages.nix, for instance globally overriding GCC or some other
  dependency.  The // operator doesn't cut it: you could replace the
  "gcc" attribute, but all other attributes would continue to
  reference the original value due to the substitution semantics of
  rec.

  The syntax is a bit hacky but this is to allow backwards
  compatibility.
2008-08-14 16:59:37 +00:00
Eelco Dolstra
9279174dde * Added an experimental feature suggested by Andres: ellipses ("...")
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 14:00:44 +00:00
Eelco Dolstra
1b962fc720 * @-patterns as in Haskell. For instance, in a function definition
f = args @ {x, y, z}: ...;

  `args' refers to the argument as a whole, which is further
  pattern-matched against the attribute set pattern {x, y, z}.
2008-08-14 12:53:29 +00:00
Eelco Dolstra
e818838412 * "pattern" non-terminal. 2008-08-14 10:14:34 +00:00
Eelco Dolstra
efe4b690ae * Refactoring: combine functions that take an attribute set and
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.
2008-08-14 10:04:22 +00:00
Eelco Dolstra
5664b6d7ba * Removed the "valid values" feature. Nobody uses it anyway. 2008-08-11 13:36:40 +00:00
Eelco Dolstra
fc691e1cbd * Print a better error message when a non-derivation attribute set is
coerced to a string.
2008-07-24 14:52:25 +00:00
Eelco Dolstra
7cd88b1dec * Generalised the dependencyClosure primop to builtins.genericClosure,
which is hopefully more useful.
* New primops: length, mul, div.
2008-07-11 13:29:04 +00:00
Eelco Dolstra
d567baabbd * Export the nix-env derivation name parsing and version comparison
logic through the `parseDrvName' and `compareVersions' primops.
  This will allow expressions to easily check whether some dependency
  is a specific needed version or falls in some version range.  See
  tests/lang/eval-okay-versions.nix for examples.
2008-07-01 10:10:32 +00:00
Sander van der Burg
c41a3ec3a9 First attempt to update Nix SDF grammar to match the actual bison grammar 2008-06-04 14:36:46 +00:00
Eelco Dolstra
bd955e15e1 * GCC 4.3.0 (Fedora 9) compatibility fixes. Reported by Gour and
Armijn Hemel.
2008-05-21 11:17:31 +00:00
Eelco Dolstra
2f1e2cf632 * Note that the SDF grammar isn't used. 2008-03-20 14:59:33 +00:00
Eelco Dolstra
0a84137c45 * checkVarDefs: don't check in closed terms, which don't have
undefined variables by definition.  This matters for the
  implementation of "with", which does a call to checkVarDefs to see
  if the body of the with has no undefined variables.  (It can't be
  checked at parse time because you don't know which variables are in
  the "with" attribute set.)  If we check closed terms, then we check
  not just the with body but also the substituted terms, which are
  typically very large.  This is the cause of the poor nix-env
  performance on Nixpkgs lately.  It didn't happen earlier because
  "with" wasn't used very often in the past.

  This fix improves nix-env performance roughly 60x on current Nixpkgs.
  nix-env -qa is down from 29.3s to 0.5s on my laptop, and nix-env -qa
  --out-path is down from 229s to 3.39s.  Not bad for a 1-line fix :-)
2008-02-21 12:01:24 +00:00
Eelco Dolstra
0ed89c569f * Fix the parsing of
''
      '${foo}'
    ''
    
  where the antiquote should work as expected, instead of giving the
  string "'${foo}'".
2008-02-05 13:38:07 +00:00
Michael Raskin
5b5a3af983 Probably fixed __exprToString 2008-01-20 20:44:03 +00:00
Michael Raskin
5eb5c23447 Fixed exportBuildReferenceGraph 2008-01-15 04:32:08 +00:00
Eelco Dolstra
7d0f6aed59 * New primop `unsafeDiscardStringContext' to get rid of string
contexts.  Needed to prevent unnecessary dependencies when building
  the NixOS manual.
2008-01-04 14:22:49 +00:00
Eelco Dolstra
dedd62dd0c * More release notes. 2007-12-31 00:08:09 +00:00
Eelco Dolstra
b42ef9c054 * Syntax to escape '', ${. 2007-12-06 10:20:58 +00:00
Eelco Dolstra
6d6c68c0d2 * Added a new kind of multi-line string literal delimited by two
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.
2007-11-30 16:48:45 +00:00
Eelco Dolstra
06f95dd07c * New primop `readFile' to get the contents of a file as a string. 2007-11-21 13:49:59 +00:00
Eelco Dolstra
fa44e401a8 * Documented multi-user Nix. 2007-10-31 18:01:56 +00:00
Eelco Dolstra
0b4ed64d29 * "trace" primop: write the trace to standard error. 2007-10-26 18:25:50 +00:00
Eelco Dolstra
27a0662828 * listToAttrs: the list now should consist of {name, value} attribute
sets instead of {attr, value}.  "name" is better than "attr" because
  the *combination* of the two forms the attribute.
2007-10-09 12:51:25 +00:00
Eelco Dolstra
f3441e6122 * Pass various options to the worker so that flags like -K or -j work
in multi-user Nix (NIX-72).
* Client/worker: exchange a protocol version number for future
  compatibility.
2007-09-18 09:11:20 +00:00
Eelco Dolstra
055608227f * nix-env: allow ~/.nix-defexpr to be a directory. If it is, then the
Nix expressions in that directory are combined into an attribute set
  {file1 = import file1; file2 = import file2; ...}, i.e. each Nix
  expression is an attribute with the file name as the attribute
  name.  Also recurses into directories.

* nix-env: removed the "--import" (-I) option which set the
  ~/.nix-defexpr symlink.

* nix-channel: don't use "nix-env --import", instead symlink
  ~/.nix-defexpr/channels.  So finally nix-channel --update doesn't
  override any default Nix expressions but combines with them.

  This means that you can have (say) a local Nixpkgs SVN tree and use
  it as a default for nix-env:

  $ ln -s .../path-to-nixpkgs-tree ~/.nix-defexpr/nixpkgs_svn

  and be subscribed to channels (including Nixpkgs) at the same time.
  (If there is any ambiguity, the -A flag can be used to
  disambiguate, e.g. "nix-env -i -A nixpkgs_svn.pan".)
2007-09-17 16:08:24 +00:00
Marc Weber
2629998e91 primop functions listToAttrs (+test), __isAttrs, __trace added
new configuration style proposal in lib/default-unstable.nix
2007-08-18 22:12:00 +00:00
Eelco Dolstra
d71cc503a6 * Don't allocate input files on the stack. 2007-08-07 15:00:13 +00:00
Eelco Dolstra
bddc83a148 * New builtin function "isFunction". You're not supposed to use it
;-)
* Channels: fix channels that are plain lists of derivations (like
  strategoxt-unstable) instead  of functions (like nixpkgs-unstable).
  This fixes the error message "error: the left-hand side of the
  function call is neither a function nor a primop (built-in
  operation) but a list".
2007-05-16 16:17:04 +00:00
Eelco Dolstra
ca00aa1171 * Allow empty argument lists in function definitions (e.g., `{}:
bla').  Also allow trailing commas (`{x, y,}: ...') as a unintented
  consequence.  Hopefully the reduce/reduce conflict won't cause any
  problems.
2007-05-15 12:14:37 +00:00
Eelco Dolstra
93aefd9fc0 * Give unpacked channels more sensible names than 0, 1, ... They now
get the basename of the channel URL (e.g., nixpkgs-unstable).  The
  top-level Nix expression of the channel is now an attribute set, the
  attributes of which are the individual channels (e.g.,
  {nixpkgs_unstable = ...; strategoxt_unstable = ...}).  This makes
  attribute paths ("nix-env -qaA" and "nix-env -iA") more sensible,
  e.g., "nix-env -iA nixpkgs_unstable.subversion".
2007-05-01 23:16:38 +00:00
Eelco Dolstra
a9d15d4f43 * nix-env -i: instead of breaking package ties by version, break them
by priority and version install.  That is, if there are multiple
  packages with the same name, then pick the package with the highest
  priority, and only use the version if there are multiple packages
  with the same priority.

  This makes it possible to mark specific versions/variant in Nixpkgs
  more or less desirable than others.  A typical example would be a
  beta version of some package (e.g., "gcc-4.2.0rc1") which should not
  be installed even though it is the highest version, except when it
  is explicitly selected (e.g., "nix-env -i gcc-4.2.0rc1").

* Idem for nix-env -u, only the semantics are a bit trickier since we
  also need to take into account the priority of the currently
  installed package (we never upgrade to a lower priority, unless
  --always is given).
2007-05-01 20:33:18 +00:00
Eelco Dolstra
5f2492eaec * New primop "throw <string>" to throw an error. This is like abort,
only thrown errors are caught by the top-level derivation evaluation
  in nix-env -qa / -i.
2007-04-16 15:03:19 +00:00
Eelco Dolstra
044b6482c1 * Greatly reduced the amount of stack space used by the Nix expression
evaluator.  This was important because the NixOS expressions started
  to hit 2 MB default stack size on Linux.

  GCC is really dumb about stack space: it just adds up all the local
  variables and temporaries of every scope into one huge stack frame.
  This is really bad for deeply recursive functions.  For instance,
  every `throw Error(format("error message"))' causes a format object
  of a few hundred bytes to be allocated on the stack.  As a result,
  every recursive call to evalExpr2() consumed 4680 bytes.  By
  splitting evalExpr2() and by moving the exception-throwing code out
  of the main functions, evalExpr2() now only consumes 40 bytes.
  Similar for evalExpr().
2007-02-27 19:10:45 +00:00
Eelco Dolstra
adce01a8d0 * When NIX_SHOW_STATS=1, show the amount of stack space consumed by
the Nix expression evaluator.
2007-02-27 17:28:51 +00:00
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
Eelco Dolstra
b618fa6eb6 * computeStorePathForText: take the references into account when
computing the store path (NIX-77).  This is an important security
  property in multi-user Nix stores.

  Note that this changes the store paths of derivations (since the
  derivation aterms are added using addTextToStore), but not most
  outputs (unless they use builtins.toFile).
2007-01-29 15:51:37 +00:00
Eelco Dolstra
c558b1583c * Don't capitalise the primop functions. 2007-01-29 15:15:37 +00:00
Eelco Dolstra
18e6096105 * Organise primops.cc a bit better. 2007-01-29 15:11:32 +00:00
Eelco Dolstra
7349bd0176 New primitives:
* `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.
2007-01-29 14:23:09 +00:00
Eelco Dolstra
7dedbd896a * filterSource: pass strings to the predicate function instead of
paths.  Paths can have unexpected semantics.
2007-01-29 13:32:50 +00:00
Eelco Dolstra
71ceb1c161 * Handle multiple indirect symlinks when loading a Nix expression. 2007-01-15 14:50:25 +00:00
Eelco Dolstra
e4b0666f8e * builtins.filterSource: pass the type of the file ("regular",
"directory", "symlink") as the second argument to the filter
  predicate.
2007-01-15 08:54:51 +00:00
Eelco Dolstra
e418976107 * Option --argstr for passing string arguments easily. (NIX-75) 2007-01-14 12:32:44 +00:00
Eelco Dolstra
f23dcdd603 * Canonicalise ASTs in `nix-instantiate --eval': remove position
info, sort attribute sets.
2007-01-13 16:17:07 +00:00
Eelco Dolstra
05879db628 * Memoize strict evaluation. 2007-01-13 15:41:54 +00:00
Eelco Dolstra
5011588459 * printTermAsXML: treat derivations specially; emit an element
<derivation outPath=... drvPath=...> attrs </derivation>.  Only emit
  the attributes of any specific derivation only.  This prevents
  exponententially large XML output due to the absense of sharing.
2007-01-13 15:11:10 +00:00
Eelco Dolstra
792878af91 * Make printing an expression as XML interruptible. 2007-01-13 14:48:41 +00:00
Eelco Dolstra
11158028be * Cleanup. 2007-01-13 14:21:49 +00:00
Eelco Dolstra
1073b1780a * Remove debug message. 2006-12-13 14:29:05 +00:00
Eelco Dolstra
a3e6415ba8 * New primop builtins.filterSource, which can be used to filter files
from a source directory.  All files for which a predicate function
  returns true are copied to the store.  Typical example is to leave
  out the .svn directory:

    stdenv.mkDerivation {
      ...
      src = builtins.filterSource
        (path: baseNameOf (toString path) != ".svn")
        ./source-dir;
      # as opposed to
      #   src = ./source-dir;
    }

  This is important because the .svn directory influences the hash in
  a rather unpredictable and variable way.
2006-12-12 23:05:01 +00:00
Eelco Dolstra
1a7e88bbd9 * New built-in function `builtins.attrNames' that returns the
names of the attributes in an attribute set.
2006-12-12 16:14:31 +00:00
Eelco Dolstra
9c9cdb06d0 * Remove SwitchToOriginalUser, we're not going to need it anymore. 2006-12-02 14:34:14 +00:00
Eelco Dolstra
fcd9900d74 * Replace read-only calls to addTextToStore. 2006-12-01 21:00:39 +00:00
Eelco Dolstra
a824d58b56 * Merge addToStore and addToStoreFixed.
* addToStore now adds unconditionally, it doesn't use readOnlyMode.
  Read-only operation is up to the caller (who can call
  computeStorePathForPath).
2006-12-01 20:51:18 +00:00
Eelco Dolstra
6ecb840fd1 * Put building in the store API. 2006-11-30 18:02:04 +00:00
Eelco Dolstra
e2ef5e07fd * Refactoring. There is now an abstract interface class StoreAPI
containing functions that operate on the Nix store.  One
  implementation is LocalStore, which operates on the Nix store
  directly.  The next step, to enable secure multi-user Nix, is to
  create a different implementation RemoteStore that talks to a
  privileged daemon process that uses LocalStore to perform the actual
  operations.
2006-11-30 17:43:04 +00:00
Eelco Dolstra
7e85a2af5f * Fix importing of derivation outputs. 2006-11-03 16:17:39 +00:00
Eelco Dolstra
dd300fb48d * Some better error messages. 2006-10-23 16:45:19 +00:00
Eelco Dolstra
17f4883bfe * Better message. 2006-10-19 17:43:58 +00:00
Eelco Dolstra
9bd93f7606 * toFile: maintain the references. 2006-10-19 17:39:02 +00:00
Eelco Dolstra
daa8f85fcd * Backwards compatibility hack for user environments made by Nix <= 0.10. 2006-10-17 14:13:15 +00:00
Eelco Dolstra
24737f279e * Backwards compatibility with old user environment manifests. 2006-10-17 14:01:45 +00:00
Eelco Dolstra
4bd5cdb90b * Print out the offending path. 2006-10-17 14:01:28 +00:00
Eelco Dolstra
58ff6939f4 * An awful backwards compatibility hack. 2006-10-17 12:58:42 +00:00
Eelco Dolstra
3059df0f1e * baseNameOf: paths don't have to be absolute. 2006-10-17 12:34:13 +00:00
Eelco Dolstra
be1961c9f8 * toPath: should be the identity on paths. 2006-10-17 11:07:11 +00:00
Eelco Dolstra
cba913c521 * dirOf: return a path if the argument is a path. 2006-10-17 11:05:34 +00:00
Eelco Dolstra
cf705eaf78 * toString: don't copy paths. So toString can be used to pass
non-store paths to a builder.
2006-10-17 10:58:12 +00:00
Eelco Dolstra
7de5fe2fc2 * Do the path check on the normal form. 2006-10-17 10:57:25 +00:00
Eelco Dolstra
d7efd76394 * Big cleanup of the semantics of paths, strings, contexts, string
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'.)
2006-10-16 15:55:34 +00:00
Eelco Dolstra
7d4567f2cc * Removed URIs from the evaluator (NIX-66). They are now just another
kind of notation for strings.
2006-10-11 21:59:33 +00:00
Eelco Dolstra
0c4c5c2020 * Quick hack to fix NIX-67: evaluation result differing if the Nix
expression resides in the store.
2006-10-10 21:23:35 +00:00
Eelco Dolstra
bd0c40e1e9 * import': unwrap the context. Necessary to make import (x + y)'
work, where x is a store path.
2006-10-10 15:07:23 +00:00
Eelco Dolstra
5fd44654db * toXML: propagate the context to allow derivations to be used in the
argument.
2006-10-03 15:38:59 +00:00
Eelco Dolstra
d20c3011a0 * toFile: added an additional argument to specify the store path
suffix, e.g., `builtins.toFile "builder.sh" "..."'.
* toFile: handle references to other files correctly.
2006-10-03 14:55:54 +00:00
Eelco Dolstra
ac19b333b3 * Finally, a real "let" syntax: `let x = ...; ... z = ...; in ...'. 2006-10-02 15:52:44 +00:00
Eelco Dolstra
7581cfdee4 * Hack for Bison 2.3 compatability. 2006-10-02 14:43:15 +00:00
Eelco Dolstra
e347033f71 * The result of a concatenation with a derivation on the left-hand
side should be a path, I guess.
* Handle paths that are in the store but not direct children of the
  store directory.
* Ugh, hack to prevent double context wrapping.
2006-09-24 21:39:57 +00:00
Eelco Dolstra
0e705391db * Primop `toPath' to convert a string to a path.
* Primop `pathExists' to check for path existence.
2006-09-24 18:23:32 +00:00
Eelco Dolstra
e47e0c2dbe * Builtin function `getEnv' for getting environment variables. 2006-09-24 17:48:41 +00:00
Eelco Dolstra
df8873e14a * lessThan primitive for integer comparison. 2006-09-24 15:21:48 +00:00
Eelco Dolstra
2ab4bc44c7 * Builtin function `add' to add integers.
* Put common test functions in tests/lang/lib.nix.
2006-09-22 15:29:21 +00:00
Eelco Dolstra
d315210612 * Added a builtin function `isList' to test whether a value is a list.
With this primitive, a list-flattening function can be implemented
  (NIX-55, example is in tests/lang/eval-okay-flatten.nix).
2006-09-22 14:55:19 +00:00
Eelco Dolstra
c02a44183f * Builtin functions head' and tail' to return the head and tail of
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 14:46:36 +00:00
Eelco Dolstra
8a1ab709a4 * New builtin functions builtins.{hasAttr, getAttr} to check for
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)
2006-09-22 14:31:55 +00:00
Eelco Dolstra
4e91d8621f * Fix comment. 2006-09-21 18:52:05 +00:00
Eelco Dolstra
1bdc152931 * Shut up a warning. 2006-09-20 16:36:29 +00:00
Eelco Dolstra
0623359fbc * Print a better error message for wrong hashes (NIX-49). 2006-09-20 16:15:32 +00:00
Eelco Dolstra
01d169f817 * Support `++'.
* More follow restrictions on layout.
2006-09-11 13:05:15 +00:00
Eelco Dolstra
fc195519b5 * Sone missing #includes. 2006-09-05 08:54:48 +00:00
Eelco Dolstra
bafc1690fc * Move setuid stuff to libutil.
* Install libexpr header files.
2006-09-04 22:55:28 +00:00
Eelco Dolstra
e5a6c09b12 * Install header files in /nix/include/nix. 2006-09-04 22:41:36 +00:00
Eelco Dolstra
4be5443882 * Remove unnecessary inclusions of aterm2.h. 2006-09-04 22:08:40 +00:00
Eelco Dolstra
e3ce954582 * Compile the lexer as C++ code. Remove all the redundant C/C++
marshalling code.
2006-09-04 21:36:15 +00:00
Eelco Dolstra
75068e7d75 * Use a proper namespace.
* Optimise header file usage a bit.
* Compile the parser as C++.
2006-09-04 21:06:23 +00:00
Eelco Dolstra
aab8812732 * Store the Nix libraries in ${libdir}/nix instead of ${libdir}. 2006-09-04 15:12:24 +00:00
Eelco Dolstra
7974aae81c * New primop: builtins.toFile, which writes a string into the store
and returns its path.  This can be used to (for instance) write
  builders inside a Nix expression, e.g.,

  stdenv.mkDerivation {
    builder = "
      source $stdenv/setup
      ...
    ";
    ...
  }
2006-09-01 12:07:31 +00:00
Eelco Dolstra
de90fdf908 * Allow "$" in strings as long as they are not followed by "{". (Too
bad flex doesn't have lexical restrictions, the current solution
  isn't quite right...)
2006-09-01 12:04:06 +00:00
Eelco Dolstra
f93f7b75be * Okay, that's a bit harder than expected. 2006-08-30 13:10:04 +00:00
Eelco Dolstra
3151bdea55 * Uninitialised variable. 2006-08-30 12:00:27 +00:00
Eelco Dolstra
547b119f25 * Support singleton values and nested lists again in `args', but print
a warning.
2006-08-29 15:40:49 +00:00
Eelco Dolstra
2132d9ddeb * Fix the ~ operator. 2006-08-29 15:29:38 +00:00
Eelco Dolstra
1ec9f55741 * In toString, deal with nested lists properly (i.e., flatten them). 2006-08-28 21:47:42 +00:00
Eelco Dolstra
1fca76870b * Removed processBinding, instead we now apply toString to all
derivation attributes to flatten them into strings.  This is
  possible since string can nowadays be wrapped in contexts that
  describe the derivations/sources referenced by the evaluation of the
  string.
2006-08-28 13:31:06 +00:00
Eelco Dolstra
8a6080eb14 * Refactoring. 2006-08-26 16:48:01 +00:00
Eelco Dolstra
4b66cebe7b * Remove those storePath attribute sets, we don't need 'em. 2006-08-25 17:09:55 +00:00
Eelco Dolstra
215ec2ddc6 * New primop __toXML (or builtins.toXML) to convert an expression to
an XML representation stored in a string.  This should be useful to
  pass structured information to builders.
2006-08-24 14:34:29 +00:00
Eelco Dolstra
f793caf936 * Refactoring. 2006-08-24 14:16:55 +00:00
Eelco Dolstra
da25d80152 * Strict evaluation and XML printing of lists. 2006-08-24 14:03:39 +00:00
Eelco Dolstra
943ab38a0d * Refactoring: move strictEval to libexpr. 2006-08-24 13:39:22 +00:00
Eelco Dolstra
9638f3f393 * Pass the autoArgs to findAlongAttrPath so that "nix-instantiate
foo.nix -A attr --arg name value" will work if (name, value) is
  needed in the evaluation leading up to "attr".
2006-08-23 16:20:14 +00:00
Eelco Dolstra
b19cebc513 * Quotes. 2006-08-23 15:46:27 +00:00
Eelco Dolstra
38f18aa6d4 * New primop: abort "error message". 2006-08-23 15:46:00 +00:00
Eelco Dolstra
4a053bfdfd * A new primop `builtins', which returns an attribute set containing
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 ...'.
2006-08-23 14:39:11 +00:00
Eelco Dolstra
2670642733 * Handle carriage returns. Fixes NIX-53. 2006-08-16 10:28:44 +00:00
Eelco Dolstra
a18d02e0b0 * Print a warning that the subpath operator (~) is deprecated. 2006-08-09 15:08:47 +00:00
Eelco Dolstra
1854f84e83 * Fix a few warnings. 2006-08-04 17:07:13 +00:00
Eelco Dolstra
4661282fde * `nix-instantiate ... --arg NAME VALUE': allow arguments to be passed
to functions from the command line.
* nix-build: started removing backticks.
2006-07-28 16:03:28 +00:00
Eelco Dolstra
c11839d7b2 * `nix-instantiate --print-args': print out the valid values for
functions arguments that have a domain.
2006-07-28 14:01:29 +00:00
Eelco Dolstra
ca2238cf81 * Refactoring: get the selection path stuff out of getDerivations()
and put it into a separate function findAlongAttrPath().
2006-07-26 15:05:15 +00:00
Eelco Dolstra
2317d8f671 * `nix-instantiate --print-args' prints out the arguments of a
top-level function.
2006-07-25 21:21:50 +00:00
Eelco Dolstra
0e6dc72a7a * Applied rbroek's patch from the branch at
https://svn.cs.uu.nl:12443/repos/trace/buildfarm-control/trunk/ext/nix/,
  with some modifications.  This allows `nix-env -qa' to show the
  attribute path that can be used to unambiguously install a package
  using `nix-env -i -A'.  Example:

    $ nix-env -f top-level/all-packages.nix -qaA subversion xorg-server
    subversionWithJava  subversion-1.2.3
    subversion          subversion-1.3.2
    subversion14        subversion-1.4.0pre-rc1
    xorg.xorgserver     xorg-server-1.1.0
2006-07-25 16:40:38 +00:00
Eelco Dolstra
7a3a5d1608 * When there is a domain check, we have to evaluate the argument.
Can't be lazy!
2006-07-24 16:49:28 +00:00
Eelco Dolstra
f4c5531d92 * New language feature: domain checks, which check whether a function
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 16:35:34 +00:00
Eelco Dolstra
57751fdb55 * Refactoring to support domain checks. 2006-07-24 15:16:03 +00:00
Eelco Dolstra
4f3725b167 * Better error messages (especially wrt types). 2006-07-19 15:36:15 +00:00
Eelco Dolstra
e10b830251 * Doh! Of couse we cannot memoize across scopes. 2006-07-11 10:29:52 +00:00
Eelco Dolstra
b1c63dc362 * Don't use badTerm, it gives awful error messages. 2006-05-30 11:31:33 +00:00
Eelco Dolstra
b5988004d6 * Support for srcdir != builddir (NIX-41). 2006-05-12 11:47:45 +00:00
Eelco Dolstra
9d72bf8835 * 64-bit compatibility fixes (for problems revealed by building on an Athlon
64 running 64-bit SUSE).  A patched ATerm library is required to run Nix
  succesfully.
2006-05-11 02:19:43 +00:00
Eelco Dolstra
5cabd47394 * Allow function argument default values to refer to other arguments
of the function.  Implements NIX-45.
2006-05-08 12:52:47 +00:00
Eelco Dolstra
310e605995 * Show evaluation stats when NIX_SHOW_STATS=1. 2006-05-08 10:00:37 +00:00
Eelco Dolstra
0832956089 * Use the new ATermMap. 2006-05-04 12:21:08 +00:00
Eelco Dolstra
d300b4383d * Optimise null-ary term builders. Also declare all term builder
functions as pure, which might improve performance a bit.
2006-05-02 21:58:46 +00:00
Eelco Dolstra
68174bdc7d * Use a linked list of substitutions. This reduces the amount of
copying.
2006-05-02 21:39:02 +00:00
Eelco Dolstra
c791e94aee * Removed a bunch of ATreverses. 2006-05-02 17:51:50 +00:00
Eelco Dolstra
b52e711910 * Huge reduction in memory use (2/3 or so on large nix-env -qas
operations): share ATermMaps between DrvInfos.
2006-05-02 17:12:03 +00:00
Eelco Dolstra
11ae2d1e7a * Memory reduction: replaced expensive calls to ATmakeApplList by
ATmakeApplArray, and got rid of ATreverse in substitute().
2006-05-02 14:07:28 +00:00
Eelco Dolstra
dc719e6ba5 * Some preliminaries towards NIX-45. 2006-05-02 13:39:55 +00:00
Eelco Dolstra
7276e194ee * Disallow unescaped $ in string literals. 2006-05-01 15:29:46 +00:00
Eelco Dolstra
0064599a27 * String interpolation. Expressions like
"--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 14:01:47 +00:00
Eelco Dolstra
6cecad2be0 * Allow string concatenations involving derivations, e.g.,
configureFlags = "--with-freetype2-library="
      + freetype + "/lib";
2006-05-01 09:56:56 +00:00
Eelco Dolstra
ef2d4a2da9 * Print a more useful stack trace when an error occurs deep in the
derivation dependency graph.
2006-03-24 14:02:44 +00:00
Eelco Dolstra
b69e469328 * In `nix-env', look for derivations inside attribute sets that have
the `recurseForDerivations' attribute set to `true'.
2006-03-23 16:43:07 +00:00
Eelco Dolstra
49ce8b57dd * Hm. 2006-03-23 16:37:49 +00:00
Eelco Dolstra
37d1b1cafd * `nix-env -qa --description' shows human-readable descriptions of
packages (provided that they have a `meta.description' attribute).
  E.g.,

  $ ./src/nix-env/nix-env -qa --description gcc
  gcc-4.0.2   GNU Compiler Collection, 4.0.x (cross-compiler for sparc-linux)
  gcc-4.0.2   GNU Compiler Collection, 4.0.x (cross-compiler for mips-linux)
  gcc-4.0.2   GNU Compiler Collection, 4.0.x (cross-compiler for arm-linux)
  gcc-4.0.2   GNU Compiler Collection, 4.0.x
2006-03-10 16:20:42 +00:00
Eelco Dolstra
2b3b6c9b34 * In theory, this should reduce the number of ATermMap
re-allocations.
2006-03-10 16:14:13 +00:00
Eelco Dolstra
b90c00e63f * Regression: semantics of the result of getDerivation() changed. 2006-03-09 15:10:01 +00:00
Eelco Dolstra
922697c8b2 * Big speedup (factor > 2.5) in all nix-env operations that do actual
instantiation, e.g. "nix-env -i" and "nix-env -qas" (but not
  "nix-env -qa").  It turns out that many redundant calls to
  addToStore(path) were made, which reads and hashes the entire path.
  For instance, the bash bootstrap binary in Nixpkgs would be read and
  hashed many times.  As a result nix-env would spend around 92% of
  its time in the function sha256_block (according to callgrind).
  Some simple memoization fixes this.
2006-03-09 15:09:18 +00:00
Eelco Dolstra
6dca5c9099 * When obtaining derivations from Nix expressions, ignore all
expressions that cause an assertion failure (like `assert system ==
  "i686-linux"').  This allows all-packages.nix in Nixpkgs to be used
  on all platforms, even if some Nix expressions don't work on all
  platforms.

  Not sure if this is a good idea; it's a bit hacky.  In particular,
  due to laziness some derivations might appear in `nix-env -qa' but
  disappear in `nix-env -qas' or `nix-env -i'.

  Commit 5000!
2006-03-08 16:03:58 +00:00
Eelco Dolstra
9088dee9e2 * Some refactoring of the exception handling code so that we can catch
Nix expression assertion failures.
2006-03-08 14:11:19 +00:00
Eelco Dolstra
fa72ae1e9c * GCC 4.1 compatibility. 2006-03-06 14:40:10 +00:00
Eelco Dolstra
c8bfb11b34 * `nix-env (-i|-u) --dry-run' now shows exactly which missing paths
will be built or substituted.
2006-03-06 11:21:15 +00:00
Eelco Dolstra
2d2e28d02c * Override YYMALLOC and YYFREE so that we can call AT[un]protectMemory
on the Bison parse stack.  Otherwise, a garbage collect during
  parsing could lead to a crash.
2006-02-13 13:09:23 +00:00
Eelco Dolstra
c6120352b3 * In nix-instantiate, allow us to specify a "path" to the
derivation(s) we're interested, e.g.,

    $ nix-instantiate ./all-packages.nix --attr xlibs.libX11

  List elements can also be selected:

    $ nix-instantiate ./build-for-release.nix --attr 0.subversion

  This allows a non-ambiguous specification of a derivation.  Of
  course, this should also be added to nix-env and nix-build.
2006-02-10 17:25:59 +00:00
Eelco Dolstra
4eb637c799 * When querying all derivations, filter out syntactically equal derivations. 2006-02-08 16:15:07 +00:00
Eelco Dolstra
8688e83194 * When evaluating, automatically call functions with default arguments. 2006-02-08 15:22:30 +00:00
Eelco Dolstra
39f50db731 * Refactoring: move derivation evaluation to libexpr. 2006-02-08 13:21:16 +00:00
Eelco Dolstra
5bf939885a * Memoise checkVarDefs since internally produced terms (i.e., not the
result of parsing) can have very heavy sharing, causing exponential
  complexity if we naively recurse into them.  ATerms are graphs, not
  trees!
2005-11-04 15:17:05 +00:00
Eelco Dolstra
221c79013f * Turn off build hooks in nix-push because of an impurity (NIX-21). 2005-10-29 18:17:45 +00:00
Eelco Dolstra
ed1db42915 * List concatenation must be right-associative for efficiency. 2005-09-14 11:41:59 +00:00
Eelco Dolstra
cf2bb91ec8 * Missing #include. 2005-09-13 13:17:01 +00:00
Eelco Dolstra
e1a6fb7870 * `dependencyClosure' now allows a search path, e.g.,
dependencyClosure { ... searchPath = [ ../foo ../bar ]; ... }

* Primop `dirOf' to return the directory part of a path (e.g., dirOf
  /a/b/c == /a/b).

* Primop `relativise' (according to Webster that's a real word!) that
  given paths A and B returns a string representing path B relative
  path to A; e.g., relativise /a/b/c a/b/x/y => "../x/y".
2005-08-14 14:00:39 +00:00
Eelco Dolstra
08c53923db * A primitive operation `dependencyClosure' to do automatic dependency
determination (e.g., finding the header files dependencies of a C
  file) in Nix low-level builds automatically.

  For instance, in the function `compileC' in make/lib/default.nix, we
  find the header file dependencies of C file `main' as follows:

    localIncludes =
      dependencyClosure {
        scanner = file:
          import (findIncludes {
            inherit file;
          });
        startSet = [main];
      };

  The function works by "growing" the set of dependencies, starting
  with the set `startSet', and calling the function `scanner' for each
  file to get its dependencies (which should yield a list of strings
  representing relative paths).  For instance, when `scanner' is
  called on a file `foo.c' that includes the line

    #include "../bar/fnord.h"

  then `scanner' should yield ["../bar/fnord.h"].  This list of
  dependencies is absolutised relative to the including file and added
  to the set of dependencies.  The process continues until no more
  dependencies are found (hence its a closure).

  `dependencyClosure' yields a list that contains in alternation a
  dependency, and its relative path to the directory of the start
  file, e.g.,

    [ /bla/bla/foo.c
      "foo.c"
      /bla/bar/fnord.h
      "../bar/fnord.h"
    ]

  These relative paths are necessary for the builder that compiles
  foo.c to reconstruct the relative directory structure expected by
  foo.c.

  The advantage of `dependencyClosure' over the old approach (using
  the impure `__currentTime') is that it's completely pure, and more
  efficient because it only rescans for dependencies (i.e., by
  building the derivations yielded by `scanner') if sources have
  actually changed.  The old approach rescanned every time.
2005-08-14 12:38:47 +00:00
Eelco Dolstra
991a130b1e * Added a list concatenation operator:
[1 2 3] ++ [4 5 6] => [1 2 3 4 5 6]
2005-07-25 15:05:34 +00:00
Eelco Dolstra
4c20a08293 * Build dynamic libraries. 2005-07-22 14:52:45 +00:00
Eelco Dolstra
0f827cc607 * Prevent repeated wrapping of closed terms
(closed(closed(closed(...)))) since this reduces performance by
  producing bigger terms and killing caching (which incidentally also
  prevents useful infinite recursion detection).
2005-07-19 11:48:05 +00:00
Eelco Dolstra
2135e7c041 * Wat cleanups. 2005-07-16 23:19:20 +00:00
Eelco Dolstra
6f82a78de7 * Define paths using regexps, as is done in the Flex definition. 2005-07-16 21:38:15 +00:00
Eelco Dolstra
6f91f02f75 * Make the rejects a bit more compact.
* Add lexical restrictions for keywords.
2005-07-16 20:43:58 +00:00
Eelco Dolstra
9590009a74 * Fix ambiguity. 2005-07-16 15:41:27 +00:00
Eelco Dolstra
f797cb5855 * Revive and update the SDF grammar for Nix expressions. 2005-07-16 14:07:35 +00:00
Eelco Dolstra
040140dd1c * Added a primop `removeAttrs' to remove attributes from a set, e.g.,
`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.
2005-05-18 17:19:21 +00:00
Eelco Dolstra
426593162e * ATermMap needs an assignment operator, otherwise we are screwed. 2005-05-08 10:28:19 +00:00
Eelco Dolstra
77557a6f06 Commit 3000!
* Make the `derivation' primitive much more lazy.  The expression
  `derivation attrs' now evaluates to (essentially)

    attrs // {
      type = "derivation";
      outPath = derivation! attrs;
      drvPath = derivation! attrs;
    }

  where `derivation!' is a primop that does the actual derivation
  instantiation (i.e., it does what `derivation' used to do).  The
  advantage is that it allows commands such as `nix-env -qa' and
  `nix-env -i' to be much faster since they no longer need to
  instantiate all derivations, just the `name' attribute.  (However,
  `nix-env' doesn't yet take advantage of this since it still always
  evaluates the `outPath' and `drvPath' attributes).

  Also, this allows derivations to cyclically reference each other,
  for example,

    webServer = derivation {
      ...
      hostName = "svn.cs.uu.nl";
      services = [svnService];
    };

    svnService = derivation {
      ...
      hostName = webServer.hostName;
    };

  Previously, this would yield a black hole (infinite recursion).
2005-05-07 21:48:49 +00:00
Eelco Dolstra
02f2da0142 * Merging from nix-make branch:
- Add __currentTime primitive (dangerous!).
  - Allow imports of derivations.
2005-05-02 14:44:58 +00:00
Eelco Dolstra
c9c58dba55 * Primop `__currentSystem' to return the current platform identifier. 2005-04-10 17:38:19 +00:00
Eelco Dolstra
10c429c757 * If store paths are specified as sources in Nix expressions, don't
copy them, but use them directly.
2005-04-07 14:35:01 +00:00
Eelco Dolstra
c815aff21b * `nix-store --add-fixed' to preload the outputs of fixed-output
derivations.  This is mostly to simplify the implementation of
  nix-prefetch-{url, svn}, which now work properly in setuid
  installations.

* Enforce valid store names in `nix-store --add / --add-fixed'.
2005-04-07 14:01:51 +00:00
Eelco Dolstra
08df443618 * Check for duplicate attributes and formal parameters in Nix
expressions.
2005-03-10 11:33:46 +00:00
Eelco Dolstra
3a2c3f0cf2 * Support for fixed-output hashes over directory trees (i.e., over the
NAR dump of the path).
2005-02-22 21:14:41 +00:00
Eelco Dolstra
20ce2642fc * Refactoring to support different installation sources in nix-env.
* Set the references for the user environment manifest properly.
* Don't copy the manifest (this was accidental).
* Don't store derivation paths in the manifest (maybe this should be
  made optional).  This cleans up the semantics of nix-env, which were
  weird.
* Hash on the output paths of activated components, not on derivation
  paths.  This is because we don't know the derivation path of already
  installed components anymore, and it allows the installation of
  components by store path (skipping Nix expressions entirely).
* Query options `--out-path' and `--drv-path' to show the output and
  derivation paths of components, respectively (the latter replaces
  the `--expr' query).
2005-02-11 16:56:45 +00:00
Eelco Dolstra
a85d1849af * Missing dependency; only a problem when building from Subversion. 2005-01-27 19:00:48 +00:00
Eelco Dolstra
6bb5efadec * Ensure that derivation names and sources don't end in `.drv'. 2005-01-20 15:25:01 +00:00
Eelco Dolstra
05f0430de1 * Another change to low-level derivations. The last one this year, I
promise :-) This allows derivations to specify on *what* output
  paths of input derivations they are dependent.  This helps to
  prevent unnecessary downloads.  For instance, a build might be
  dependent on the `devel' and `lib' outputs of some library
  component, but not the `docs' output.
2005-01-20 14:10:19 +00:00
Eelco Dolstra
96de272b48 * Renamed normalise.cc' -> build.cc', `storeexprs.cc' ->
`derivations.cc', etc.
* Store the SHA-256 content hash of store paths in the database after
  they have been built/added.  This is so that we can check whether
  the store has been messed with (a la `rpm --verify').
* When registering path validity, verify that the closure property
  holds.
2005-01-19 16:39:47 +00:00
Eelco Dolstra
06c77bf7a8 * Change extension .store' to .drv'.
* Re-enable `nix-store --query --requisites'.
2005-01-19 14:36:00 +00:00
Eelco Dolstra
863dcff6c5 * Started removing closure store expressions, i.e., the explicit
representation of closures as ATerms in the Nix store.  Instead, the
  file system pointer graph is now stored in the Nix database.  This
  has many advantages:

  - It greatly simplifies the implementation (we can drop the notion
    of `successors', and so on).

  - It makes registering roots for the garbage collector much easier.
    Instead of specifying the closure expression as a root, you can
    simply specify the store path that must be retained as a root.
    This could not be done previously, since there was no way to find
    the closure store expression containing a given store path.
    
  - Better traceability: it is now possible to query what paths are
    referenced by a path, and what paths refer to a path.
2005-01-19 11:16:11 +00:00
Eelco Dolstra
6d493751c3 * Get --readonly-mode to work again. 2005-01-18 11:15:50 +00:00
Eelco Dolstra
f3dc231250 * Removed the `id' attribute hack.
* Formalise the notion of fixed-output derivations, i.e., derivations
  for which a cryptographic hash of the output is known in advance.
  Changes to such derivations should not propagate upwards through the
  dependency graph.  Previously this was done by specifying the hash
  component of the output path through the `id' attribute, but this is
  insecure since you can lie about it (i.e., you can specify any hash
  and then produce a completely different output).  Now the
  responsibility for checking the output is moved from the builder to
  Nix itself.

  A fixed-output derivation can be created by specifying the
  `outputHash' and `outputHashAlgo' attributes, the latter taking
  values `md5', `sha1', and `sha256', and the former specifying the
  actual hash in hexadecimal or in base-32 (auto-detected by looking
  at the length of the attribute value).  MD5 is included for
  compatibility but should be considered deprecated.

* Removed the `drvPath' pseudo-attribute in derivation results.  It's
  no longer necessary.

* Cleaned up the support for multiple output paths in derivation store
  expressions.  Each output now has a unique identifier (e.g., `out',
  `devel', `docs').  Previously there was no way to tell output paths
  apart at the store expression level.

* `nix-hash' now has a flag `--base32' to specify that the hash should
  be printed in base-32 notation.

* `fetchurl' accepts parameters `sha256' and `sha1' in addition to
  `md5'.

* `nix-prefetch-url' now prints out a SHA-1 hash in base-32.  (TODO: a
  flag to specify the hash.)
2005-01-17 16:55:19 +00:00
Eelco Dolstra
d58a11e019 * Shorten SHA-256 hashes used in store path name generation to 160
bits, then encode them in a radix-32 representation (using digits
  and letters except e, o, u, and t).  This produces store paths like
  /nix/store/4i0zb0z7f88mwghjirkz702a71dcfivn-aterm-2.3.1.  The nice
  thing about this is that the hash part of the file name is still 32
  characters, as before with MD5.

  (Of course, shortening SHA-256 to 160 bits makes it no better than
  SHA-160 in theory, but hopefully it's a bit more resistant to
  attacks; it's certainly a lot slower.)
2005-01-14 16:04:03 +00:00
Eelco Dolstra
9530cc3170 * Start move towards SHA-256 hashes instead of MD5.
* Start cleaning up unique store path generation (they weren't always
  unique; in particular the suffix ("-aterm-2.2", "-builder.sh") was
  not part of the hash, therefore changes to the suffix would cause
  multiple store objects with the same hash).
2005-01-14 13:51:38 +00:00
Eelco Dolstra
7e8961f720 * Added SHA-1 support. nix-hash' now has an option --type sha1' to
select SHA-1 hashing.
2005-01-13 17:39:26 +00:00
Eelco Dolstra
73992371a3 * Refactoring to support SHA-1. 2005-01-13 15:44:44 +00:00
Eelco Dolstra
cb7ccb528b * string2ATerm -> overloaded toATerm. 2004-11-03 18:12:03 +00:00
Eelco Dolstra
a69534fc21 * Drop ATmake / ATMatcher also in handling store expressions. 2004-10-29 11:22:49 +00:00
Eelco Dolstra
3277c9432a * Bug fix in parsing of /* ... */ comments; due to longest match
regexp there could be only one such comment per file.
2004-10-27 13:00:31 +00:00
Eelco Dolstra
c7bea941b0 * Oops, I did it again. 2004-10-27 10:05:51 +00:00
Eelco Dolstra
210ab0296d * Add file to `make dist'. 2004-10-27 00:02:31 +00:00
Eelco Dolstra
c52dda95a6 * Bug: check that term is an application. 2004-10-26 23:30:18 +00:00
Eelco Dolstra
5fe9222b36 * Don't use ATmake / ATmatch anymore, nor the ATMatcher class.
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 22:54:26 +00:00
Eelco Dolstra
eb8284ddaa * Evaluate argument to `import'. 2004-10-26 17:10:09 +00:00
Eelco Dolstra
033d7c6593 * Doh! 2004-10-26 17:04:55 +00:00
Eelco Dolstra
9fa07b376d * String/path concatenation operator (`+'). 2004-10-26 17:01:35 +00:00
Eelco Dolstra
37d7abd694 * New language feature: with expressions.
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 16:54:56 +00:00
Eelco Dolstra
f4d44a0026 * Allow certain operations to succeed even if we don't have write
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.
2004-10-25 14:38:23 +00:00
Eelco Dolstra
47f87072ad * A very dirty hack to make setuid installations a bit nicer to use.
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).
2004-09-09 21:12:53 +00:00
Eelco Dolstra
9994c1dd9f * Validate derivation names. In particular don't allow spaces.
* Drop support for the outPath attribute in derivations.
2004-08-24 11:46:05 +00:00
Eelco Dolstra
d8989b1fb4 * Every real language has a `map' function. 2004-08-04 11:27:53 +00:00
Eelco Dolstra
bbfdd64741 * Allow primops with more that 1 arguments. 2004-08-04 10:59:20 +00:00
Eelco Dolstra
59b94ee18a * When something goes wrong in the evaluation of a Nix expression,
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.
2004-04-05 22:27:41 +00:00
Eelco Dolstra
a520b1cbc3 * Print a more useful error message in case of an invalid derivation
binding.
2004-04-02 10:49:37 +00:00
Eelco Dolstra
c4ac2a164a * The recent change in nixpkgs of calling `stdenv.mkDerivation'
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)'.
2004-03-30 15:05:35 +00:00
Eelco Dolstra
ac4d39f9db * Added an operator `?' to test for attribute existence, e.g.,
`attrs ? x' yields true iff `attrs' has an attribute named `x'.
2004-03-28 21:15:01 +00:00
Eelco Dolstra
f958bcdf1f * Added an operator `~' to select paths within a derivation. E.g.,
{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 20:58:28 +00:00
Eelco Dolstra
db3e644c1c * Added plain lambdas, e.g., `let { id = x: x; const = x: y: x; }'.
`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];
    ...
2004-03-28 20:34:22 +00:00
Eelco Dolstra
79bb0008ec * `null' is a normal form. 2004-03-19 14:45:45 +00:00
Eelco Dolstra
dbf547645d * Resolve an ambiguity between ifs and attribute selection, e.g., `if
b then x else y.z'.
2004-02-19 13:11:12 +00:00
Eelco Dolstra
0dfdafdf6d * Allow linking against an external Berkeley DB / ATerm library. 2004-02-16 16:37:16 +00:00
Eelco Dolstra
fbc48a469c * Inherited attributes in recursive attribute sets are in scope of the
non-inherited attributes.
2004-02-16 09:18:35 +00:00
Eelco Dolstra
d445da7a7b * Extended the `inherit' syntax to optionally select attributes from
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 17:23:26 +00:00
Eelco Dolstra
9d25466b34 * An attribute set update operator (//). E.g.,
{x=1; y=2; z=3;} // {y=4;}  =>  {x=1; y=4; z=3;}
2004-02-04 16:49:51 +00:00
Eelco Dolstra
9b44480612 * Use a map to lookup primops.
* Various performance improvements in the evaluator.
* Do not link against unused (and missing!) libraries (-lsglr, etc.).
2004-02-04 16:03:29 +00:00
Eelco Dolstra
c4f7ae4aa5 * Verify that all variables in a Nix expression are defined. 2004-02-03 14:45:34 +00:00
Eelco Dolstra
1c9c0a5a46 * Added syntactic sugar to the construction of attribute sets to
`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}'.
2004-02-02 21:39:33 +00:00
Eelco Dolstra
47c003cb59 * Doh! 2004-01-30 17:14:08 +00:00
Eelco Dolstra
619f20775d * Parser numbers again.
* Include missing files in distributions.
2004-01-30 17:06:03 +00:00
Eelco Dolstra
c625718513 * Detect flex and bison; updated the manual. 2004-01-30 16:32:14 +00:00
Eelco Dolstra
c5baaafae6 * Replaced the SDF parser by a substantially faster Bison/Flex
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.
2004-01-30 15:21:42 +00:00
Eelco Dolstra
abd1878b26 * Optimised the SDF grammar. 2004-01-29 14:24:53 +00:00
Eelco Dolstra
1109ea0680 * Fixed a subtle uninitialised variable bug in ATermMaps copied from
ATermMaps.  Found thanks to Valgrind!
2004-01-21 14:49:32 +00:00
Eelco Dolstra
447089a5f6 * Catch SIGINT to terminate cleanly when the user tries to interrupt
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 20:23:55 +00:00
Eelco Dolstra
08719c6c97 * Obsolete. 2004-01-15 20:13:54 +00:00
Eelco Dolstra
4a373a3e9a * Implemented Eelco V.'s `nix-env -I' command to specify the default
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.
2004-01-05 16:26:43 +00:00
Eelco Dolstra
66c115ef5f * More `make dist' fixes. 2003-11-25 13:01:21 +00:00
Eelco Dolstra
6e8c19714a * Allow integer bindings in derivations. 2003-11-25 12:05:48 +00:00
Eelco Dolstra
ab0bc4999a * Maintain integrity of the substitute and successor mappings when
deleting a path in the store.
* Allow absolute paths in Nix expressions.
* Get nix-prefetch-url to work again.
* Various other fixes.
2003-11-22 18:45:56 +00:00
Eelco Dolstra
06208d1d86 * Uninstallation. 2003-11-21 14:23:18 +00:00
Eelco Dolstra
9898746ef3 * nix-env: a tool to manage user environments.
* Replace all directory reading code by a generic readDirectory()
  function.
2003-11-19 17:27:16 +00:00
Eelco Dolstra
fd7ac09f10 * Refactoring (step 2). 2003-11-19 12:03:01 +00:00
Eelco Dolstra
ac68840e79 * Refactoring: put the Nix expression evaluator in its own library so
that it can be used by multiple programs.
2003-11-19 11:35:41 +00:00