haskellPathsInDir

lib.filesystem.haskellPathsInDir

Docs pulled from | This Revision | 10 minutes ago

A map of all haskell packages defined in the given path, identified by having a cabal file with the same name as the directory itself.

Inputs

root: The directory within to search

Type

Path -> Map String Path

Noogle detected

Implementation

The following is the current implementation of this function.

haskellPathsInDir =
    root:
    let
      # Files in the root
      root-files = builtins.attrNames (builtins.readDir root);
      # Files with their full paths
      root-files-with-paths = map (file: {
        name = file;
        value = root + "/${file}";
      }) root-files;
      # Subdirectories of the root with a cabal file.
      cabal-subdirs = builtins.filter (
        { name, value }: builtins.pathExists (value + "/${name}.cabal")
      ) root-files-with-paths;
    in
    builtins.listToAttrs cabal-subdirs;