abraunegg-onedrive/src/util.d

import std.conv: to;
import std.digest.crc;
import std.digest.digest;
import std.file: exists, rename;
import std.path: extension;
import std.stdio;
import std.string: chomp;

private string deviceName;

static this()
{
	import std.socket;
	deviceName = Socket.hostName;
}

// give a new name to the specified file or directory
void safeRename(const(char)[] path)
{
	auto ext = extension(path);
	auto newPath = path.chomp(ext) ~ "-" ~ deviceName;
	if (exists(newPath ~ ext)) {
		int n = 2;
		char[] newPath2;
		do {
			newPath2 = newPath ~ "-" ~ n.to!string;
			n++;
		} while (exists(newPath2 ~ ext));
		newPath = newPath2;
	}
	newPath ~= ext;
	rename(path, newPath);
}

// return the crc32 hex string of a file
string computeCrc32(string path)
{
	CRC32 crc;
	auto file = File(path, "rb");
	foreach (ubyte[] data; chunks(file, 4096)) {
		crc.put(data);
	}
	return crc.finish().toHexString().dup;
}