mirror of
https://github.com/tanrax/bash-folders.git
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100 lines
2.1 KiB
Bash
Executable File
100 lines
2.1 KiB
Bash
Executable File
#!/usr/bin/env bash
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# --
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# Description: Script that watches when new image (PNG or JPEG) are added and transform to WebP format.
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# --
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# Requirements: Install webp
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# Example Debian: $sudo apt install webp
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# --
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# Cron: @reboot bash-folders-image-to-webp.sh >/dev/null 2>&1 &
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# --
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# START
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set -e
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# FUNCTIONS
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usage() {
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if [ "$*" != "" ] ; then
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echo "Error: $*"
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fi
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cat << EOF
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Usage: $PROGNAME [OPTION]
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Watches when new image (PNG or JPEG) are added and transform to WebP format.
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Options:
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--folder [path] Folder path where will be monitored.
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--help Display this usage message and exit
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EOF
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exit 1
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}
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start() {
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# Monitors the selected folder
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inotifywait -m -e create,moved_to --format '%f' "$FOLDER_ORIGIN" |
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while read -r filename; do
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# Gets the file extension
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extension="${filename##*.}"
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# Checks if the extension is in the extension list
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for ext in "${EXTENSIONS_TO_WATCH[@]}"; do
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if [[ "$ext" = "$extension" ]]; then
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filename_output="${filename%.*}.webp"
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# Displays a flat file of information
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touch "$FOLDER_ORIGIN/$MESSAGE_WAITING"
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# Converts the image to WebP
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cwebp -q "$QUALITY" "$FOLDER_ORIGIN/$filename" -o "$FOLDER_ORIGIN/$filename_output"
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# Remove a flat file of information
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rm "$FOLDER_ORIGIN/$MESSAGE_WAITING"
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fi
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done
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done
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}
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# CONTROLE ARGUMENTS
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# Parse command line arguments
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while [[ $# -gt 0 ]]
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do
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key="$1"
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case $key in
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--folder)
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FOLDER_ORIGIN="$2"
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shift # past argument
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shift # past value
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;;
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--quality)
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QUALITY="$2"
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shift # past argument
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shift # past value
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;;
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*)
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usage "Unknown option: $1"
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;;
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esac
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done
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# VARIABLES
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PROGNAME=$(basename "$0")
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QUALITY="90"
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MESSAGE_WAITING="converting_please_wait"
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EXTENSIONS_TO_WATCH=("jpg" "jpeg" "png")
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# CHECKS
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# Check if exists cwebp
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if ! which cwebp > /dev/null; then
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echo "Error: You must install the WebP terminal tools."
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exit 1
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fi
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# Check if the required --folder flag is provided
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if [ -z "$FOLDER_ORIGIN" ]; then
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echo "Error: The --folder flag is required."
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exit 1
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fi
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start
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