Batch-add an empty file and Finder comment to a list of directories as a way of matching them to a catalog id

Reindex.tool

#!/bin/bash

# Batch-add an empty file and Finder comment to a list of directories 
# as a way of matching them to a catalog id.
#
# Takes a 2-column semicolon-separated CSV file. First column is a
# directory; second column is a catalog index or id. Creates an empty
# txt file whose filename is the catalog index in the 2nd column inside
# the directory in the 1st column. Also writes the catalog index in the
# 2nd column as a Finder comment (overwriting any existing one) of the
# directory in the 1st column. Directories in the 1st column must exist
# in the user-provided parent directory. For cataloging purposes.
# Can be used in tandem with 
# https://gist.github.com/elmimmo/6f558b7483a191d056d1d7810789d8c5
# but is not required.
# Requires macOS.
#
# Author: Jorge Hernández Valiñani

# Exit if anything breaks
set -e

: ${INDEX_BASENAME:="_list.csv"}

# Clear the screen
if [ -z "$PARENT_DIR" ]; then
	printf "\033c"
fi

# Ask for `PARENT_DIR`
if [ -z "$PARENT_DIR" ]; then
	read -p "Drag parent folder here & press Enter: " PARENT_DIR
fi

# `$PARENT_DIR` should have trailing slash
if [[ ! "$PARENT_DIR" =~ /$ ]]; then
	PARENT_DIR="${PARENT_DIR}"/
fi

# `$PARENT_DIR` should exist
if [ ! -d "${PARENT_DIR}" ]; then
	echo "❗️ Failed. Parent folder '${PARENT_DIR}' does not exist." 1>&2
	exit 1
fi

# Ask for `INDEX`
if [ -z "$INDEX_BASENAME" -o ! -f "${PARENT_DIR}${INDEX_BASENAME}" ]; then
	read -p "Drag index file (“_list.csv”) here & press Enter: " INDEX
else
	INDEX=${PARENT_DIR}${INDEX_BASENAME}
fi

# `$INDEX` should exist
if [ ! -f "${INDEX}" ]; then
	echo "❗️ Failed. Index file does not exist." 1>&2
	exit 1
fi

while IFS= read -r LINE
do
	# `$LINE` should contain a semicolon
	case "$LINE" in 
		*\;*)
		;;
		*)
			echo "❗️ The line '$LINE' in the index is not a semicolon-separated line. Skipping." 1>&2
			continue
		;;
	esac

	# THIS_FOLDER="$(echo "$LINE"|sed -E 's/\;[^\;]+$//;s/\//\:/;g')"
	THIS_FOLDER="$(echo "$LINE"|sed -E 's/\;[^\;]+$//;')"
	THIS_INDEX="$(echo "$LINE"|sed 's/^.*\;//;')"

	# `$THIS_FOLDER` should have trailing slash
	if [[ ! "$THIS_FOLDER" =~ /$ ]]; then
		THIS_FOLDER="${THIS_FOLDER}"/
	fi

	#`$THIS_FOLDER` should exist
	if [ ! -d "${PARENT_DIR}${THIS_FOLDER%/}" ]; then
		echo "❗️ Folder '${THIS_FOLDER%/}' in the index does not exist. Skipping." 1>&2
		continue
	fi

	# `$THIS_INDEX` should not be empty
	if [ -z "$THIS_INDEX" ]; then
		echo "❗️ Failed. Index of '${THIS_FOLDER%/}' seems empty." 1>&2
		exit 1
	fi


	# Save the folder's modification date
	# (`date -r $file` only available on some later macOS versions so fallback to `stat`)
	THIS_DATE=$(date -j -r "${PARENT_DIR}${THIS_FOLDER%/}" +"%Y%m%d%H%M.%S" 2>&- || \
	            date -j -r $(stat -f "%m" "${PARENT_DIR}${THIS_FOLDER%/}") "+%Y%m%d%H%M.%S")

	# Delete preexisting index files (i.e. empty '.txt' files in the root)
	find "${PARENT_DIR}${THIS_FOLDER%/}" -mindepth 1 -maxdepth 1 -name '*.txt' -empty -exec rm {} \; 2>&- || true

	# Add the index
	touch -t "$THIS_DATE" "${PARENT_DIR}${THIS_FOLDER}${THIS_INDEX}".txt

	ITEMS_TO_INDEX=( "${PARENT_DIR}${THIS_FOLDER%/}" )
	if [ -f "${PARENT_DIR}${THIS_FOLDER%/} - "errors.log ]; then
		ITEMS_TO_INDEX+=( "${PARENT_DIR}${THIS_FOLDER%/} - "errors.log )
	fi
	if [ -f "${PARENT_DIR}${THIS_FOLDER%/} - "interrupted.log ]; then
		ITEMS_TO_INDEX+=( "${PARENT_DIR}${THIS_FOLDER%/} - "interrupted.log )
	fi

	for THIS_ITEM_TO_INDEX in "${ITEMS_TO_INDEX[@]}"
	do
		osascript -e 'on run {f, c}' -e 'tell app "Finder" to set comment of (POSIX file f as alias) to c' -e end "$THIS_ITEM_TO_INDEX" "$THIS_INDEX" >/dev/null
	done	

	# Restore the folder's modification date
	touch -t "$THIS_DATE" "${PARENT_DIR}${THIS_FOLDER%/}"
done< "${INDEX}"