How to properly remove (delete all related files and folders) ESA SNAP product from Python?

kedziorm · December 12, 2016, 3:07pm

I wrote a small piece of Python code for removing ESA SNAP products:

import shutil, os

def removeProduct(file_path):
	# Very ugly way of deleting ESA SNAP product. It was tested only with "BEAM-DIMAP" and "GeoTIFF" formats.
	if (os.path.exists(file_path)):
		if (os.path.splitext(file_path)[1] == '.dim'):
			dirToRem = get_data_path(file_path)
			shutil.rmtree(dirToRem) # will delete a directory and all its contents.
		os.remove(file_path)
	else:
		print("Trying to remove non-existing file: {0}".format(file_path)])

def get_data_path(file_path):
	# Gets '.data' folder for '.dim' files (products saved in "BEAM-DIMAP" format)
	data_path = os.path.splitext(file_path)[0] + '.data'
	if (not os.path.isdir(data_path)):
		print("There is *NO* following folder '{0}'. Please ensure where data for '{1}' file are".format(data_path, file_path))
	return data_path

I wonder if there is any ready-to-use method in snappy module for removing geospatial data sets ? Could you suggest proper way of removing (from Python) ESA SNAP products saved in any format, please?

marpet · December 12, 2016, 4:24pm

With out reading the product there is no generic way.
To improve the deletion you can have a look at the following code snippet:

github.com

senbox-org/snap-desktop/blob/f542558073bac1ec3c847a06f9aced65732d6eef/snap-product-library/src/main/java/org/esa/snap/productlibrary/rcp/toolviews/ProductFileHandler.java#L188-L206


public static void delete(final ProductEntry entry) throws Exception {


    if (isDimap(entry)) {
        Files.delete(entry.getFile().toPath());
        final String dataFolderName = entry.getFile().getName().replace(
                DimapProductConstants.DIMAP_HEADER_FILE_EXTENSION,
                DimapProductConstants.DIMAP_DATA_DIRECTORY_EXTENSION);
        final File dataFolder = new File(entry.getFile().getParentFile(), dataFolderName);
        FileIOUtils.deleteFolder(dataFolder.toPath());
    } else if (isSMOS(entry)) {
        Files.delete(entry.getFile().toPath());
        final File hdrFile = FileUtils.exchangeExtension(entry.getFile(), ".HDR");
        Files.delete(hdrFile.toPath());
    } else if (isFolderProduct(entry)) {
        FileIOUtils.deleteFolder(entry.getFile().getParentFile().toPath());
    } else if (isSingleFile(entry)) {
        Files.delete(entry.getFile().toPath());
    }
}

When reading the product you also have the reader (casted to AbstractProductReader).
The AbstractProductReader has the method getProductComponents().
This returns the components which belong to the product.
But I think the above example is appropriate for you.