eldritch horrors
feebecd60b
otherwise lix may crash when e.g. nix search receives invalid regex. we now also give better error messages for regex errors during eval. fixes #803 Change-Id: Icc7c578ff488ba520efac5d898572ccf4486e9a8
32 lines
1013 B
C++
32 lines
1013 B
C++
#include "regex.hh"
|
|
#include <string>
|
|
#include <regex>
|
|
|
|
// Declared as extern in precompiled-headers.hh
|
|
template class std::basic_regex<char>;
|
|
|
|
namespace nix::regex {
|
|
std::string quoteRegexChars(const std::string & raw)
|
|
{
|
|
static auto specialRegex = parse(R"([.^$\\*+?()\[\]{}|])");
|
|
return std::regex_replace(raw, specialRegex, R"(\$&)");
|
|
}
|
|
|
|
std::regex storePathRegex(const std::string & storeDir)
|
|
{
|
|
return parse(quoteRegexChars(storeDir) + R"(/[0-9a-z]+[0-9a-zA-Z\+\-\._\?=]*)");
|
|
}
|
|
|
|
std::regex parse(std::string_view re, std::regex::flag_type flags)
|
|
try {
|
|
return std::regex(re.begin(), re.end(), flags); // NOLINT: lix-foreign-exceptions
|
|
} catch (std::regex_error & e) { // NOLINT: lix-foreign-exceptions
|
|
if (e.code() == std::regex_constants::error_space) {
|
|
// limit is _GLIBCXX_REGEX_STATE_LIMIT for libstdc++
|
|
throw Error("memory limit exceeded by regular expression '%s'", re);
|
|
} else {
|
|
throw Error("invalid regular expression '%s': %s", re, e.what());
|
|
}
|
|
}
|
|
}
|