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Turn flake inputs into an attrset

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Instead of a list, inputs are now an attrset like

  inputs = {
    nixpkgs.uri = github:NixOS/nixpkgs;
  };

If 'uri' is omitted, than the flake is a lookup in the flake registry, e.g.

  inputs = {
    nixpkgs = {};
  };

but in that case, you can also just omit the input altogether and
specify it as an argument to the 'outputs' function, as in

  outputs = { self, nixpkgs }: ...

This also gets rid of 'nonFlakeInputs', which are now just a special
kind of input that have a 'flake = false' attribute, e.g.

  inputs = {
    someRepo = {
      uri = github:example/repo;
      flake = false;
    };
  };
This commit is contained in:
Eelco Dolstra 2019-08-30 16:27:51 +02:00
parent 0588d72286
commit 30ccf4e52d
7 changed files with 136 additions and 220 deletions
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79
src/libexpr/flake/lockfile.hh
View file

@ -10,47 +10,15 @@ class Store;
namespace nix::flake {
/* Common lock file information about a flake input, namely the
immutable ref and the NAR hash. */
struct AbstractInput
{
FlakeRef ref;
Hash narHash;
AbstractInput(const FlakeRef & flakeRef, const Hash & narHash)
: ref(flakeRef), narHash(narHash)
{
assert(ref.isImmutable());
};
AbstractInput(const nlohmann::json & json);
nlohmann::json toJson() const;
Path computeStorePath(Store & store) const;
};
/* Lock file information about a non-flake input. */
struct NonFlakeInput : AbstractInput
{
using AbstractInput::AbstractInput;
bool operator ==(const NonFlakeInput & other) const
{
return ref == other.ref && narHash == other.narHash;
}
};
struct FlakeInput;
struct LockedInput;
/* Lock file information about the dependencies of a flake. */
struct FlakeInputs
struct LockedInputs
{
std::map<FlakeRef, FlakeInput> flakeInputs;
std::map<FlakeAlias, NonFlakeInput> nonFlakeInputs;
std::map<FlakeId, LockedInput> inputs;
FlakeInputs() {};
FlakeInputs(const nlohmann::json & json);
LockedInputs() {};
LockedInputs(const nlohmann::json & json);
nlohmann::json toJson() const;
@ -60,47 +28,48 @@ struct FlakeInputs
};
/* Lock file information about a flake input. */
struct FlakeInput : FlakeInputs, AbstractInput
struct LockedInput : LockedInputs
{
FlakeId id;
FlakeRef ref;
Hash narHash;
FlakeInput(const FlakeId & id, const FlakeRef & flakeRef, const Hash & narHash)
: AbstractInput(flakeRef, narHash), id(id) {};
LockedInput(const FlakeRef & ref, const Hash & narHash)
: ref(ref), narHash(narHash)
{
assert(ref.isImmutable());
};
FlakeInput(const nlohmann::json & json);
LockedInput(const nlohmann::json & json);
bool operator ==(const FlakeInput & other) const
bool operator ==(const LockedInput & other) const
{
return
id == other.id
&& ref == other.ref
ref == other.ref
&& narHash == other.narHash
&& flakeInputs == other.flakeInputs
&& nonFlakeInputs == other.nonFlakeInputs;
&& inputs == other.inputs;
}
nlohmann::json toJson() const;
Path computeStorePath(Store & store) const;
};
/* An entire lock file. Note that this cannot be a FlakeInput for the
top-level flake, because then the lock file would need to contain
the hash of the top-level flake, but committing the lock file
would invalidate that hash. */
struct LockFile : FlakeInputs
struct LockFile : LockedInputs
{
bool operator ==(const LockFile & other) const
{
return
flakeInputs == other.flakeInputs
&& nonFlakeInputs == other.nonFlakeInputs;
return inputs == other.inputs;
}
LockFile() {}
LockFile(const nlohmann::json & json) : FlakeInputs(json) {}
LockFile(FlakeInput && dep)
LockFile(const nlohmann::json & json) : LockedInputs(json) {}
LockFile(LockedInput && dep)
{
flakeInputs = std::move(dep.flakeInputs);
nonFlakeInputs = std::move(dep.nonFlakeInputs);
inputs = std::move(dep.inputs);
}
nlohmann::json toJson() const;