#!/usr/bin/env bash

# To run: `yadm-untracked <config-file>`
#
# If you wish to create a YADM alias to run this as, for example `yadm untracked`
# then the following command will add the alias:
#     `yadm gitconfig alias.untracked '!<PATH>/yadm-untracked'`

# Possible script improvements:
# - Reduce the amount of configuration; I have not figured out a way to
#   get rid of the non-recursive and ignore. The recursive list could be
#   built from the directories that are present in `yadm list`

# Configuration... The script looks at the following 3 arrays:
#
# yadm_tracked_recursively
#     The directories and files in this list are searched recursively to build
#     a list of files that you expect are tracked with `yadm`. Items in this
#     list are relative to the root of your YADM repo (which is $HOME for most).

# yadm_tracked_nonrecursively
#     Same as above but don't search recursively
#
# ignore_files_and_dirs
#     A list of directories and files that will not be reported as untracked if
#     found in the above two searches.
#
# Example configuration file (uncomment it to use):
# yadm_tracked_recursively=(
#     bin .config .vim
# )
#
# yadm_tracked_nonrecursively=(
#     ~
# )
#
# ignore_files_and_dirs=(
#     .CFUserTextEncoding .DS_Store .config/gh
#     .vim/autoload/plug.vim
# )

if [[ $# -ne 1 ]]; then
    echo 'Usage: yadm-untracked <config-file>'
    exit 1
fi

yadm_tracked_recursively=()
yadm_tracked_nonrecursively=()
ignore_files_and_dirs=()

source $1

root=`yadm enter echo '$GIT_WORK_TREE'`

cd $root

find_list=$(mktemp -t find_list)
find ${yadm_tracked_recursively[*]} -type f >$find_list
find ${yadm_tracked_nonrecursively[*]} -maxdepth 1 -type f |
  awk "{sub(\"^\./\", \"\"); sub(\"^$root/\", \"\"); print }" >>$find_list
sort -o $find_list $find_list

yadm_list=$(mktemp -t yadm_list)
yadm list >$yadm_list
find ${ignore_files_and_dirs[*]} -type f >>$yadm_list
sort -o $yadm_list $yadm_list

# Show the files not in `yadm list`
comm -23 $find_list $yadm_list

rm -f $find_list $yadm_list