ignore_matcher.h

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// SPDX-License-Identifier: Apache-2.0
#pragma once
 
#include <filesystem>
#include <regex>
#include <string>
#include <vector>
 
namespace entropic {
 
class IgnoreMatcher {
public:
    IgnoreMatcher() = default;
 
    void load(const std::filesystem::path& root);
 
    void add_pattern(const std::string& pattern,
                     const std::filesystem::path& base = {});
 
    bool is_ignored(const std::string& rel_path,
                    bool is_dir) const;
 
    std::size_t rule_count() const { return rules_.size(); }
 
    struct Rule {
        std::regex re_exact;      
        std::regex re_under;      
        bool negate = false;      
        bool dir_only = false;    
        std::string original;     
        std::string base;         
    };
 
private:
 
    static Rule compile_pattern(const std::string& pattern,
                                const std::string& base);
 
    static std::string pattern_to_regex(const std::string& pattern);
 
    void load_file(const std::filesystem::path& path,
                   const std::string& base);
 
    void load_nested_gitignores(const std::filesystem::path& canonical_root,
                                const std::filesystem::path& root_gi);
 
    std::vector<Rule> rules_;     
};
 
} // namespace entropic