read_boolean

Boolean read_boolean(File)

Reads a file that contains a single line containing only a boolean value and (optional) whitespace. If the non-whitespace content of the line is "true" or "false", that value is returned as a Boolean. If the file is empty or does not contain a single boolean, an error is raised. The comparison is case- and whitespace-insensitive.

Parameters

1. File: Path of the file to read.

Returns: A Boolean.

Example: read_bool_task.wdl

version 1.2

task read_bool {
  command <<<
  printf "  true  \n" > true_file
  printf "  FALSE  \n" > false_file
  >>>

  output {
    Boolean b1 = read_boolean("true_file")
    Boolean b2 = read_boolean("false_file")
  }
}

{}

{
  "read_bool.b1": true,
  "read_bool.b2": false
}