Function getRelativePath

src/system.cpp:357–372

Returns `p` in relative path form, relative to `base` Limitation: `p` must be a descendant of `base`. Doesn't support adding `../` to the return path. */

Limitation: `p` must be a descendant of `base`. Doesn't support adding `../` to the return path.
*/
static std::string getRelativePath(std::string path, std::string base) {
	try {
		path = fs::absolute(fs::u8path(path)).generic_u8string();
		base = fs::absolute(fs::u8path(base)).generic_u8string();
	}
	catch (fs::filesystem_error& e) {
		throw Exception("%s", e.what());
	}
	if (path.size() < base.size())
		throw Exception("getRelativePath() error: path is shorter than base");
	if (!std::equal(base.begin(), base.end(), path.begin()))
		throw Exception("getRelativePath() error: path does not begin with base");

	// If path == base, this correctly returns "."
	return "." + std::string(path.begin() + base.size(), path.end());
}


static la_ssize_t archiveWriteVectorCallback(struct archive* a, void* client_data, const void* buffer, size_t length) {