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* Optimise header file usage a bit.
* Compile the parser as C++.
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to functions from the command line.
* nix-build: started removing backticks.
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and put it into a separate function findAlongAttrPath().
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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
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operations): share ATermMaps between DrvInfos.
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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
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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.
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