5f1d1bc57e
Add a friendly function to easily return a flattened list of files within a directory. This is useful if you want to easily iterate or concatSep the list of files all found within a directory. (i.e. when constructing Java's CLASSPATH) Style improvements Co-authored-by: Silvan Mosberger <github@infinisil.com>
57 lines
2.1 KiB
Nix
57 lines
2.1 KiB
Nix
{ lib }:
|
|
{ # haskellPathsInDir : Path -> Map String Path
|
|
# 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.
|
|
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;
|
|
# locateDominatingFile : RegExp
|
|
# -> Path
|
|
# -> Nullable { path : Path;
|
|
# matches : [ MatchResults ];
|
|
# }
|
|
# Find the first directory containing a file matching 'pattern'
|
|
# upward from a given 'file'.
|
|
# Returns 'null' if no directories contain a file matching 'pattern'.
|
|
locateDominatingFile = pattern: file:
|
|
let go = path:
|
|
let files = builtins.attrNames (builtins.readDir path);
|
|
matches = builtins.filter (match: match != null)
|
|
(map (builtins.match pattern) files);
|
|
in
|
|
if builtins.length matches != 0
|
|
then { inherit path matches; }
|
|
else if path == /.
|
|
then null
|
|
else go (dirOf path);
|
|
parent = dirOf file;
|
|
isDir =
|
|
let base = baseNameOf file;
|
|
type = (builtins.readDir parent).${base} or null;
|
|
in file == /. || type == "directory";
|
|
in go (if isDir then file else parent);
|
|
|
|
|
|
# listFilesRecursive: Path -> [ Path ]
|
|
#
|
|
# Given a directory, return a flattened list of all files within it recursively.
|
|
listFilesRecursive = dir: lib.flatten (lib.mapAttrsToList (name: type:
|
|
if type == "directory" then
|
|
lib.filesystem.listFilesRecursive (dir + "/${name}")
|
|
else
|
|
dir + "/${name}"
|
|
) (builtins.readDir dir));
|
|
|
|
}
|