readPathsFromFile

lib.strings.readPathsFromFile

Docs pulled from | This Revision | about 3 hours ago

Read a list of paths from file, relative to the rootPath. Lines beginning with # are treated as comments and ignored. Whitespace is significant.

This function is deprecated and should be avoided.

This function is not performant and should be avoided.

Inputs

rootPath: 1. Function argument
file: 2. Function argument

Type

readPathsFromFile :: string -> string -> [string]

Examples

`lib.strings.readPathsFromFile` usage example

readPathsFromFile /prefix
  ./pkgs/development/libraries/qt-5/5.4/qtbase/series
=> [ "/prefix/dlopen-resolv.patch" "/prefix/tzdir.patch"
     "/prefix/dlopen-libXcursor.patch" "/prefix/dlopen-openssl.patch"
     "/prefix/dlopen-dbus.patch" "/prefix/xdg-config-dirs.patch"
     "/prefix/nix-profiles-library-paths.patch"
     "/prefix/compose-search-path.patch" ]

Noogle detected

Aliases

lib.readPathsFromFile

Implementation

The following is the current implementation of this function.

readPathsFromFile = lib.warn "lib.readPathsFromFile is deprecated, use a list instead."
    (rootPath: file:
      let
        lines = lib.splitString "\n" (readFile file);
        removeComments = lib.filter (line: line != "" && !(lib.hasPrefix "#" line));
        relativePaths = removeComments lines;
        absolutePaths = map (path: rootPath + "/${path}") relativePaths;
      in
        absolutePaths);