A makefile for creating thumbnails of JPEG and PNG images in a directory tree, recursively recreating it. Being a makefile, it only (re)creates the thumbnails if the original file has not been existing before or it has been modified.
Warning Being a makefile, it does not detect file deletion in the original directory tree. This might lead to leftover thumbnails.
- The size of the thumbnails, as well as the source directory and the thumbnails directory may be configured (see configuration below).
- Thumbnails are created resizing the image and centering it in both dimensions. If the source image is smaller (in both dimensions) than the requested thumbnail size, the thumbnail will be the same as the source image
- Profile and EXIF data are stripped
make # in the directory where you put make-tn's makefilefrom the following directory structure
- images/01.jpg
- images/02.jpg
- images/sub/03.jpg
- images/sub/sub/04.png
make-tn creates the thumbnails
- thumbs/01.jpg
- thumbs/02.jpg
- thumbs/sub/03.jpg
- thumbs/sub/sub/04.png
as well as, if not already existing, the following directories
- thumbs
- thumbs/sub
- thumbs/sub/sub
Several variables may be set on the command line
make TN_DIR=my_thumbs- IMG_DIR images input directory (default is "images")
- TN_DIR thumbnails output directory (default is "thumbs")
- TN_W thumbnail width (in pixels, default is 400)
- TN_H thumbnail height (in pixels, default is 400)
make-tn requires make and convert (part of ImageMagick)
Distributed under the MIT License. See LICENSE.txt for more information.