path-regex.hh

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#pragma once
 
namespace nix {
 
 
static constexpr std::string_view nameRegexStr =
    // This uses a negative lookahead: (?!\.\.?(-|$))
    //   - deny ".", "..", or those strings followed by '-'
    //   - when it's not those, start again at the start of the input and apply the next regex, which is [0-9a-zA-Z\+\-\._\?=]+
    R"((?!\.\.?(-|$))[0-9a-zA-Z\+\-\._\?=]+)";
 
}