Manual thumbnail generation script
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Authored by Samwilson on Apr 29 2018, 4:02 AM.

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	#!/bin/bash

	USAGE="Usage: "$(basename $0)" <sourcefile> <width>"

	if [ ! -f "$1" ]; then
	echo "Error: first parameter must be a file path." >&2
	echo $USAGE
	exit 1
	fi
	if ! [[ "$2" =~ ^[0-9]+$ ]]; then
	echo "Error: second parameter must be an integer." >&2
	echo $USAGE
	exit 1
	fi

	SRC="$1"
	WIDTH=$2
	RELSRC=$(echo $SRC \| rev \| cut -d/ -f1-3 \| rev )
	DEST=$(dirname $(dirname $(dirname $SRC)))"/thumb/"$RELSRC"/"$WIDTH"px-"$(basename "$SRC")

	echo "Create this file?"
	echo $DEST
	echo -n "[y/n]: "
	read
	if [[ $REPLY =~ ^[Yy]$ ]]
	then
	mkdir -p $(dirname "$DEST")
	convert -resize $WIDTH "$SRC" "$DEST"
	fi

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