tabify

#!/bin/bash

usage() {
	script="./$(basename "$0")"

	cat <<-DOC
	Usage: $script {-s|-t} PATTERN

	Converts files from spaces to tabs, or vice versa.

	Example: To convert a bunch of files to spaces that are named like "file123.py"
        $script -s "fi*.py"

	Both Sublime Text and VS Code space/tab convertor behave identically. They only touch leading characters,
	and not inline text (say vertically aligned comments). This tool differs by converting the entire file.

	Options:
        -s, --spaces        convert file(s) to spaces
        -t, --tabs          convert file(s) to tabs
        -h, --help          show this help message
DOC
}

spaces=false
tabs=false

if [ $# -eq 0 ]; then
	echo "Try '$script --help' for more information."
	exit 1
fi

while [ $# -gt 0 ]; do
	case $1 in
	-s | --spaces)
		spaces=true
		;;
	-t | --tabs)
		tabs=true
		;;
	-h | --help)
		usage
		exit 1
		;;
	*)
		glob=$1
		;;
	esac
	shift
done

if [ -z "$glob" ]; then
	echo "error: must specify a glob pattern"
	exit 1
fi

if $spaces; then
	exp="expand -t 4"
elif $tabs; then
	exp="unexpand -t 4"
else
	usage
	exit 1
fi

find ! \( -path "*/.git" -prune \
		-o -path "*/venv" -prune \
		-o -path "*/.idea" -prune \) -type f -name "$glob" \
		-exec bash -c 'cp "$0" /tmp/e; $1 /tmp/e > "$0"; echo Reformatted: "$0"' {} "$exp" \;