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nix: New installables syntax

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The general syntax for an installable is now
<flakeref>:<attrpath>. The attrpath is relative to the flake's
'provides.packages' or 'provides' if the former doesn't yield a
result. E.g.

  $ nix build nixpkgs:hello

is equivalent to

  $ nix build nixpkgs:packages.hello

Also, '<flakeref>:' can be omitted, in which case it defaults to
'nixpkgs', e.g.

  $ nix build hello
This commit is contained in:
Eelco Dolstra 2019-04-08 14:21:13 +02:00
parent 6b0ca8e803
commit 154244adc6
3 changed files with 72 additions and 56 deletions
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2
src/libexpr/primops/flake.hh
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@ -23,7 +23,7 @@ Path getUserRegistryPath();
Value * makeFlakeRegistryValue(EvalState & state);
Value * makeFlakeValue(EvalState & state, std::string flakeUri, Value & v);
Value * makeFlakeValue(EvalState & state, const FlakeRef & flakeRef, bool impureTopRef, Value & v);
std::shared_ptr<FlakeRegistry> readRegistry(const Path &);