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Remove TreeInfo

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The attributes previously stored in TreeInfo (narHash, revCount,
lastModified) are now stored in Input. This makes it less arbitrary
what attributes are stored where.

As a result, the lock file format has changed. An entry like

    "info": {
      "lastModified": 1585405475,
      "narHash": "sha256-bESW0n4KgPmZ0luxvwJ+UyATrC6iIltVCsGdLiphVeE="
    },
    "locked": {
      "owner": "NixOS",
      "repo": "nixpkgs",
      "rev": "b88ff468e9850410070d4e0ccd68c7011f15b2be",
      "type": "github"
    },

is now stored as

    "locked": {
      "owner": "NixOS",
      "repo": "nixpkgs",
      "rev": "b88ff468e9850410070d4e0ccd68c7011f15b2be",
      "type": "github",
      "lastModified": 1585405475,
      "narHash": "sha256-bESW0n4KgPmZ0luxvwJ+UyATrC6iIltVCsGdLiphVeE="
    },

The 'Input' class is now a dumb set of attributes. All the fetcher
implementations subclass InputScheme, not Input. This simplifies the
API.

Also, fix substitution of flake inputs. This was broken since lazy
flake fetching started using fetchTree internally.
This commit is contained in:
Eelco Dolstra 2020-05-30 00:44:11 +02:00
parent 5633c0975b
commit 950b46821f
30 changed files with 963 additions and 1145 deletions
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10
src/libexpr/flake/flakeref.hh
View file

@ -14,17 +14,15 @@ typedef std::string FlakeId;
struct FlakeRef
{
std::shared_ptr<const fetchers::Input> input;
fetchers::Input input;
Path subdir;
bool operator==(const FlakeRef & other) const;
FlakeRef(const std::shared_ptr<const fetchers::Input> & input, const Path & subdir)
: input(input), subdir(subdir)
{
assert(input);
}
FlakeRef(fetchers::Input && input, const Path & subdir)
: input(std::move(input)), subdir(subdir)
{ }
// FIXME: change to operator <<.
std::string to_string() const;