| 1 | #include "resolver.h" |
| 2 | #include "parser.h" |
| 3 | #include <filesystem> |
| 4 | #include <fstream> |
| 5 | #include <iostream> |
| 6 | #include <regex> |
| 7 | #include <sstream> |
| 8 | |
| 9 | namespace nix_irc { |
| 10 | |
| 11 | namespace fs = std::filesystem; |
| 12 | |
| 13 | struct Resolver::Impl { |
| 14 | ResolverConfig config; |
| 15 | std::vector<std::pair<std::string, std::string>> resolved_imports; |
| 16 | std::unordered_set<std::string> visited; |
| 17 | Parser parser; |
| 18 | |
| 19 | Impl(const ResolverConfig& cfg) : config(cfg) {} |
| 20 | |
| 21 | std::string resolve_path(const std::string& path, const std::string& from_file) { |
| 22 | fs::path p(path); |
| 23 | |
| 24 | if (p.is_absolute()) { |
| 25 | if (fs::exists(p)) |
| 26 | return path; |
| 27 | return ""; |
| 28 | } |
| 29 | |
| 30 | fs::path from_dir = fs::path(from_file).parent_path(); |
| 31 | fs::path candidate = from_dir / p; |
| 32 | if (fs::exists(candidate)) |
| 33 | return candidate.string(); |
| 34 | |
| 35 | for (const auto& search : config.search_paths) { |
| 36 | candidate = fs::path(search) / p; |
| 37 | if (fs::exists(candidate)) |
| 38 | return candidate.string(); |
| 39 | } |
| 40 | |
| 41 | return ""; |
| 42 | } |
| 43 | |
| 44 | ImportResult do_resolve(const std::string& path, const std::string& from_file) { |
| 45 | std::string resolved = resolve_path(path, from_file); |
| 46 | |
| 47 | if (resolved.empty()) { |
| 48 | return {false, "", "Cannot find file: " + path, nullptr}; |
| 49 | } |
| 50 | |
| 51 | if (visited.count(resolved)) { |
| 52 | return {true, resolved, "", nullptr}; |
| 53 | } |
| 54 | visited.insert(resolved); |
| 55 | |
| 56 | try { |
| 57 | auto ast = parser.parse_file(resolved); |
| 58 | return {true, resolved, "", ast}; |
| 59 | } catch (const std::exception& e) { |
| 60 | return {false, "", e.what(), nullptr}; |
| 61 | } |
| 62 | } |
| 63 | }; |
| 64 | |
| 65 | Resolver::Resolver(const ResolverConfig& config) : pImpl(std::make_unique<Impl>(config)) {} |
| 66 | Resolver::~Resolver() = default; |
| 67 | |
| 68 | void Resolver::add_search_path(const std::string& path) { |
| 69 | pImpl->config.search_paths.push_back(path); |
| 70 | } |
| 71 | |
| 72 | void Resolver::set_search_paths(const std::vector<std::string>& paths) { |
| 73 | pImpl->config.search_paths = paths; |
| 74 | } |
| 75 | |
| 76 | ImportResult Resolver::resolve_import(const std::string& path, const std::string& from_file) { |
| 77 | auto result = pImpl->do_resolve(path, from_file); |
| 78 | if (result.success && result.ast) { |
| 79 | pImpl->resolved_imports.push_back({path, result.path}); |
| 80 | } |
| 81 | return result; |
| 82 | } |
| 83 | |
| 84 | ImportResult Resolver::resolve_import(const Node& import_node, const std::string& from_file) { |
| 85 | const ConstPathNode* path_node = import_node.get_if<ConstPathNode>(); |
| 86 | if (!path_node) { |
| 87 | return {false, "", "Dynamic import not supported", nullptr}; |
| 88 | } |
| 89 | return resolve_import(path_node->value, from_file); |
| 90 | } |
| 91 | |
| 92 | std::vector<std::string> Resolver::get_resolved_files() const { |
| 93 | std::vector<std::string> files; |
| 94 | for (const auto& [orig, resolved] : pImpl->resolved_imports) { |
| 95 | (void) orig; |
| 96 | files.push_back(resolved); |
| 97 | } |
| 98 | return files; |
| 99 | } |
| 100 | |
| 101 | std::vector<std::pair<std::string, std::string>> Resolver::get_imports() const { |
| 102 | return pImpl->resolved_imports; |
| 103 | } |
| 104 | |
| 105 | bool is_static_import(const Node& node) { |
| 106 | return node.holds<ConstPathNode>(); |
| 107 | } |
| 108 | |
| 109 | std::string normalize_path(const std::string& path) { |
| 110 | fs::path p(path); |
| 111 | return fs::absolute(p).string(); |
| 112 | } |
| 113 | |
| 114 | } // namespace nix_irc |