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70 lines
1.4 KiB
Bash
Executable File
70 lines
1.4 KiB
Bash
Executable File
#!/usr/bin/env bash
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# Generate thumbnails using ImageMagick (magick)
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# https://imagemagick.org/script/download.php
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#
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# Defaults to current directory creating thumbnails with 1000x1000
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# dimensions and 200px white borders around the original image.
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#
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# Defaults can be overridden with ENV variables like this:
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# $ THMB_BACKGROUND=black x-thumbgen ~/images/
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#
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# Created by: Ismo Vuorinen <https://github.com/ivuorinen> 2015
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set -euo pipefail
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# Default values
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: "${THMB_SOURCE:=${1:-}}"
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: "${THMB_BACKGROUND:=white}"
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: "${THMB_RESIZE:=800x800}"
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: "${THMB_EXTENT:=1000x1000}"
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# Print usage information
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usage()
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{
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echo "Usage: $0 /full/path/to/image/folder"
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exit 1
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}
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# Check if ImageMagick is installed
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check_magick_installed()
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{
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if ! command -v magick &> /dev/null; then
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echo "magick not found in PATH, https://imagemagick.org/script/download.php"
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exit 1
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fi
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}
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# Generate thumbnails
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generate_thumbnails()
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{
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local source=$1
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magick \
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"${source}/*" \
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-resize "$THMB_RESIZE" \
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-background "$THMB_BACKGROUND" \
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-gravity center \
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-extent "$THMB_EXTENT" \
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-set filename:fname '%t_thumb.%e' +adjoin '%[filename:fname]'
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}
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# Main function
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main()
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{
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# Validate input
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if [ -z "$THMB_SOURCE" ]; then
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usage
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fi
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# Check if the source directory is valid
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if [ ! -d "$THMB_SOURCE" ]; then
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echo "Invalid directory: $THMB_SOURCE"
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exit 1
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fi
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check_magick_installed
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generate_thumbnails "$THMB_SOURCE"
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}
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main "$@"
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