vendor/json/pull-from-upstream.sh

#!/bin/bash
# © 2016 and later: Unicode, Inc. and others.
# License & terms of use: http://www.unicode.org/copyright.html

if [[ -z $1 ]]; then
	echo "Pass the current version tag of json as the first argument to this script";
	echo "To pull the latest changes, use 'master'"
	exit 1;
fi

url="https://github.com/nlohmann/json/archive/$1.tar.gz";
upstream_root="$(dirname "$0")/upstream";
icu4c_i18n_root="$(dirname "$0")/../../icu4c/source/tools/toolutil";
tmpdir=`mktemp -d`;
filename="$tmpdir/$1.tar.gz"
upstream_root_tmp="$tmpdir/upstream"
patch_root_tmp="$tmpdir/patches"

echo "Will download $url";
read -p "Press Enter to continue or s to skip: " ch;

if [ "$ch" != "s" ]; then
	wget -O "$filename" "$url";
	mkdir "$upstream_root_tmp";
	tar zxf $filename --strip 1 -C "$upstream_root_tmp";
fi

echo "Will apply diffs to $icu4c_i18n_root";
read -p "Press Enter to continue or s to skip: " ch;

do_patch() {
	old_vendor_path="$upstream_root/single_include/nlohmann/$1";
	new_vendor_path="$upstream_root_tmp/single_include/nlohmann/$1";
	icu4c_path="$icu4c_i18n_root/$2";
	tmp_path="$patch_root_tmp/$2.patch";
	diff -u "$old_vendor_path" "$icu4c_path" > "$tmp_path";
	cp "$new_vendor_path" "$icu4c_path";
	patch --merge "$icu4c_path" < "$tmp_path";
}

do_patch_prefix_extension() {
	do_patch "$1.$2" "json-$1.$3";
}

do_patch_extension() {
	do_patch "$1.$2" "$1.$3";
}

if [ "$ch" != "s" ]; then
	mkdir "$patch_root_tmp";
	do_patch_prefix_extension json hpp hpp;
fi

echo "Will save pristine copy into $upstream_root";
read -p "Press Enter to continue or s to skip: " ch;

if [ "$ch" != "s" ]; then
       rm -r "$upstream_root"; # in case any files were deleted in the new version
       mkdir -p "$upstream_root/single_include/nlohmann";
       cp "$upstream_root_tmp/LICENSE.MIT" "$upstream_root";
       cp "$upstream_root_tmp/single_include/nlohmann/json.hpp" "$upstream_root/single_include/nlohmann";
fi

echo "Temporary files have been saved in $tmpdir";
read -p "Press Enter to delete the directory or s to skip: " ch;

if [ "$ch" != "s" ]; then
	rm -rf "$tmpdir";
fi