Add download script

scripts/download.sh

@@ -0,0 +1,51 @@
+#!/bin/bash
+source scripts/utils.sh echo -n
+
+# Saner programming env: these switches turn some bugs into errors
+set -o errexit -o pipefail
+
+# This script is meant to be used with the command 'datalad run'
+
+# Download dataset
+files_url=(
+	"https://bigearth.net/downloads/BigEarthNet-S2-v1.0.tar.gz S2/BigEarthNet-S2-v1.0.tar.gz"
+	"https://bigearth.net/static/documents/Description_BigEarthNet-S2.pdf S2/Description_BigEarthNet-S2.pdf"
+	"https://bigearth.net/static/documents/patches_with_seasonal_snow.csv S2/patches_with_seasonal_snow.csv"
+	"https://bigearth.net/static/documents/patches_with_cloud_and_shadow.csv S2/patches_with_cloud_and_shadow.csv"
+	"https://bigearth.net/downloads/BigEarthNet-S1-v1.0.tar.gz S1/BigEarthNet-S1-v1.0.tar.gz"
+	"https://bigearth.net/static/documents/Description_BigEarthNet-S1.pdf S1/Description_BigEarthNet-S1.pdf"
+	"https://bigearth.net/static/documents/Description_BigEarthNet-MM.pdf MM/Description_BigEarthNet-MM.pdf")
+
+git-annex addurl --fast -c annex.largefiles=anything --raw --batch --with-files <<EOF
+$(for file_url in "${files_url[@]}" ; do echo "${file_url}" ; done)
+EOF
+# Downloads should complete correctly but in multiprocesses the last git-annex
+# step most likely fails on a BGFS with the error "rename: resource busy
+# (Device or resource busy)"
+! git-annex get --fast -J8
+# Remove the last byte from each files to prevent the "download failed:
+# ResponseBodyTooShort" error
+ls -l $(list) | grep -oE "\.git/[^']*" | \
+	cut -d'/' -f7 | xargs -n1 -- find .git/annex/tmp/ -name | \
+	while read f
+	do
+		newfsize=$(($(stat -c '%s' "${f}") - 1))
+		truncate -s $newfsize "${f}"
+	done
+# Retry incomplete downloads
+git-annex get --fast --incomplete
+git-annex migrate --fast -c annex.largefiles=anything *
+
+# Verify dataset
+if [[ -f md5sums ]]
+then
+	md5sum -c md5sums
+fi
+list -- --fast | while read f
+do
+	if [[ -z "$(echo "${f}" | grep -E "^bin/")" ]] &&
+		[[ -z "$(grep -E " (\./)?${f//\./\\.}$" md5sums)" ]]
+	then
+		md5sum "${f}" >> md5sums
+	fi
+done