set -g __ta_error            1
set -g __ta_error_bad_input  2
set -g __ta_error_no_tasks   3

# Standalone installation.
if set -q ta_path
  for file in $ta_path/**
    switch $file
      case \*.fish
        set -l dir (dirname $file)
        # Skip completions and spec directories.
        if test (basename $dir) != "completions" -a \
                (basename $dir) != "spec"
          if not contains -- "$dir" $fish_function_path
            set fish_function_path "$dir" $fish_function_path
          end
        end
    end
  end

# Oh-my-fish installation.
else if set -q fish_path
  set -g ta_path $fish_path/plugins/ta
  # Oh-my-fish lets you import modules easily. For standalone fish
  # installations, fish getopts is already included in the path.
  import plugins/getopts
else
  # Neither $INSTALL_PATH or $fish_path exists.
  echo "Please review the installation instructions and try again." ^&2
  exit $__ta_error
end

set -g __ta_file_info  $ta_path/config/tafile
set -g __ta_file_data  $ta_path/data/tasks

# Regular expression used to extract tags from tasks.
set -g __ta_regex "#\S*"

# Seconds elapsed between last and current task to commit.
set -g __ta_delta 0

# Flag to track whether the undo stack is locked. Tasks are usually
# inmutable except for the most recent task to allow simple mistake
# correction.
set -q __ta_undo_lock
  or set -g __ta_undo_lock false