diff options
Diffstat (limited to 'nix')
| -rw-r--r-- | nix/readTree/default.nix | 34 |
1 files changed, 34 insertions, 0 deletions
diff --git a/nix/readTree/default.nix b/nix/readTree/default.nix index 3738a6cea61e..5e805b5f4a97 100644 --- a/nix/readTree/default.nix +++ b/nix/readTree/default.nix @@ -20,6 +20,7 @@ let inherit (builtins) attrNames + concatMap concatStringsSep elem elemAt @@ -125,7 +126,40 @@ let then nodeValue // allChildren // (marker parts allChildren) else nodeValue; + # Function can be used to find all readTree targets within an + # attribute set. + # + # This function will gather physical targets, that is targets which + # correspond directly to a location in the repository, as well as + # subtargets (specified in the meta.targets attribute of a node). + # + # This can be used to discover targets for inclusion in CI + # pipelines. + # + # Called with the arguments: + # + # eligible: Function to determine whether the given derivation + # should be included in the build. + gather = eligible: node: + if node ? __readTree then + # Include the node itself if it is eligible. + (if eligible node then [ node ] else []) + # Include eligible children of the node + ++ concatMap (gather eligible) (map (attr: node."${attr}") node.__readTreeChildren) + # Include specified sub-targets of the node + ++ filter eligible (map + (k: (node."${k}" or {}) // { + # Keep the same tree location, but explicitly mark this + # node as a subtarget. + __readTree = node.__readTree; + __readTreeChildren = []; + __subtarget = k; + }) + (node.meta.targets or [])) + else []; in { + inherit gather; + __functor = _: { path , args |