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simplifies stuff.
* The format of Nix expressions and the database schema changed
because of this, so it's best to delete old Nix installations.
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fstate -> Nix expression).
* Fix src/test.cc.
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slices and derivations w.r.t. order of paths, slice elements, etc.
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keys to reference slice elements, e.g.,
Slice(["1ef7..."], [("/nix/store/1ef7...-foo", "1ef7", ["8c99..."]), ...])
This was wrong, since ids represent contents, not locations. Therefore we
now have:
Slice(["/nix/store/1ef7..."], [("/nix/store/1ef7...-foo", "1ef7", ["/nix/store/8c99-..."]), ...])
* Fix a bug in the computation of slice closures that could cause slice
elements to be duplicated.
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("srcs", [Relative("foo/bar.c"), Relative("foo/baz.h")])
The result is an environment variable that contains the path names of the
inputs separated by spaces (so this is not safe for values containing
spaces).
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builder using the `args' binding:
("args", ["bla", True, IncludeFix("aterm/aterm.fix")])
Note that packages can also be declared as inputs by specifying them
in the argument list.
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* Allow booleans in package environment bindings (True maps to "1",
False maps to "").
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normalise to Nix expression.
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transaction support (but we don't actually use transactions yet).
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this more efficient.
* A flag `-n' in 'nix --query' to normalise the argument. Default is
not to normalise.
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instead (e.g., `-vvvv' for lots of output). Default is to only
print error messages.
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up to the given verbosity levels. These currently are:
lvlError = 0,
lvlNormal = 5,
lvlDebug = 10,
lvlDebugMore = 15
although only lvlError and lvlDebug are actually used right now.
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substituting for (obvious, really).
* For greater efficiency, nix-pull/unnar will place the output in a
path that is probably the same as what is actually needed, thus
preventing a path copy.
* Even if a output id is given in a Fix package expression, ensure
that the resulting Nix derive expression has a different id. This
is because Nix expressions that are semantically equivalent (i.e.,
build the same result) might be different w.r.t. efficiency or
divergence. It is absolutely vital for the substitute mechanism
that such expressions are not used interchangeably.
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value; this potentially dangerous feature enables better
sharing for those paths for which the content is known in
advance (e.g., because a content hash is given).
* Fast builds: if we can expand all output paths of a derive
expression, we don't have to build.
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* Fix -qp query.
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returning different paths if the hash of the path to be added was
already available in the store under a different name).
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archives (using the package in corepkgs/nar).
* queryPathByHash -> expandHash, and it takes an argument specifying
the target path (which may be empty).
* Install the core Fix packages in $prefix/share/fix. TODO: bootstrap
Nix and install Nix as a Fix package.
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include the paths of the subterms.
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expressions for identical inputs.
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* Use a temporary directory for build actions.
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(especially in fetchurl.fix).
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a mapping from the hash to a url has been registered through `nix
regurl'.
* Bug fix in nix: don't pollute stdout when running tar, it made
nix-switch barf.
* Bug fix in nix-push-prebuilts: don't create a subdirectory on the
target when rsync'ing.
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sharing package directories (i.e., the result of building a Nix
descriptor).
`nix-pull-prebuilts' obtains a list of all known prebuilts by
consulting the paths and URLs specified in
$prefix/etc/nix/prebuilts.conf. The mappings ($pkghash,
$prebuilthash) and ($prebuilthash, $location) are registered with
Nix so that it can use the prebuilt with hash $prebuilthash when
installing a package with hash $pkghash by downloading and unpacking
$location.
`nix-push-prebuilts' creates prebuilts for all packages for which no
prebuilt is known to exist. It can then optionally upload these
to the network through rsync.
`nix-[pull|push]-prebuilts' just provide a policy. Nix provides the
mechanism through the `nix [export|regprebuilt|regurl]' commands.
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* Conditionals and variables in Fix expressions. This allows, e.g.,
Descr(
[ Bind("pkgId", "subversion-0.21.0")
, Bind("httpsClient", Bool(True))
, Bind("httpServer", Bool(True))
, Bind("ssl", If(Var("httpsClient"), Fix("./openssl-0.9.7b.fix"), ""))
, Bind("httpd", If(Var("httpServer"), Fix("./httpd-2.0.45.fix"), ""))
...
])
which introduces domain feature variables httpsClient and httpServer
(i.e., whether Subversion is built with https client and webdav
server support); the values of the variables influences package
dependencies and the build scripts.
The next step is to allow that packages can express constraints on
each other. E.g., StrategoXT is dependent on an ATerm library with
the "gcc" variant enabled. In fact, this may cause several
Nix instantiations to be created from a single Fix descriptor. If
possible, Fix should try to find the least set of instantiations
that obeys the constraints.
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descriptors generated out of Fix descriptors specified on the
command line. This allows us to say:
nix-switch $(fix -i ./test/fixdescriptors/system.fix)
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* A script to generate prebuilt registration scripts.
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nix-instantiate.
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