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Change the lock file to a graph

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This enables support for cycles between flakes.
This commit is contained in:
Eelco Dolstra 2020-03-12 22:06:57 +01:00
parent e188fe7c6d
commit ae9119167e
7 changed files with 303 additions and 253 deletions
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39
src/libexpr/flake/call-flake.nix
View file

@ -1,22 +1,27 @@
locks: rootSrc: rootSubdir:
lockFileStr: rootSrc: rootSubdir:
let
callFlake = sourceInfo: subdir: locks:
let
flake = import (sourceInfo + "/" + subdir + "/flake.nix");
lockFile = builtins.fromJSON lockFileStr;
inputs = builtins.mapAttrs (n: v:
if v.flake or true
then callFlake (fetchTree (removeAttrs v.locked ["dir"])) (v.locked.dir or "") v.inputs
else fetchTree v.locked) locks;
allNodes =
builtins.mapAttrs
(key: node:
let
sourceInfo = if key == lockFile.root then rootSrc else fetchTree (removeAttrs node.locked ["dir"]);
subdir = if key == lockFile.root then rootSubdir else node.locked.dir or "";
flake = import (sourceInfo + (if subdir != "" then "/" else "") + subdir + "/flake.nix");
inputs = builtins.mapAttrs (inputName: key: allNodes.${key}) (node.inputs or {});
outputs = flake.outputs (inputs // { self = result; });
result = outputs // sourceInfo // { inherit inputs; inherit outputs; inherit sourceInfo; };
in
if node.flake or true then
assert flake.edition or flake.epoch or 0 == 201909;
assert builtins.isFunction flake.outputs;
result
else
sourceInfo
)
lockFile.nodes;
outputs = flake.outputs (inputs // { self = result; });
result = outputs // sourceInfo // { inherit inputs; inherit outputs; inherit sourceInfo; };
in
assert flake.edition == 201909;
result;
in callFlake rootSrc rootSubdir (builtins.fromJSON locks).inputs
in allNodes.${lockFile.root}