Determine extract spec

src/archive.cpp

@@ -15,26 +15,6 @@ namespace logger = spdlog;
 
 namespace xwim {
 
-Archive::Archive(std::string path) : path{std::filesystem::path(path)} {
-  int r;  // libarchive error handling
-
-  logger::trace("Setting up archive reader");
-  this->xwim_archive = archive_read_new();
-  archive_read_support_filter_all(this->xwim_archive);
-  archive_read_support_format_all(this->xwim_archive);
-
-  logger::trace("Reading archive at {}", path.c_str());
-  r = archive_read_open_filename(this->xwim_archive, path.c_str(), 10240);
-  if (r != ARCHIVE_OK)
-    throw ArchiveException{"Could not open archive file", this->xwim_archive};
-
-  logger::trace("Archive read succesfully");
-}
-
-Archive::~Archive() {
-  archive_read_free(this->xwim_archive);
-}
-
 static archive_entry* _archive_next_entry(archive* archive) {
   int r;  // libarchive error handling
   archive_entry* entry;
@@ -46,6 +26,7 @@ static archive_entry* _archive_next_entry(archive* archive) {
   logger::trace("Got archive header");
   return entry;
 }
+
 static void _spec_is_root_filename(ArchiveSpec* spec,
                                    archive_entry* entry,
                                    std::filesystem::path* filepath) {
@@ -80,19 +61,21 @@ static void _spec_is_root_dir(ArchiveSpec* spec, archive_entry* entry) {
 static void _spec_has_single_root(ArchiveSpec* spec,
                                   archive_entry* first_entry,
                                   archive* archive) {
-
-  std::filesystem::path first_entry_root = *(std::filesystem::path{archive_entry_pathname(first_entry)}.begin());
+  std::filesystem::path first_entry_root =
+      *(std::filesystem::path{archive_entry_pathname(first_entry)}.begin());
   logger::trace("Testing roots");
 
   spec->has_single_root = true;
   archive_entry* entry;
   while (archive_read_next_header(archive, &entry) == ARCHIVE_OK) {
     std::filesystem::path next_entry{archive_entry_pathname(entry)};
-    logger::trace("Path: {}, Root: {}", next_entry.string(), next_entry.begin()->string());
+    logger::trace("Path: {}, Root: {}", next_entry.string(),
+                  next_entry.begin()->string());
 
     if (first_entry_root != *next_entry.begin()) {
       logger::debug("Archive has multiple roots");
-      logger::debug("\t-> Archive root I: {}", first_entry_root.begin()->string());
+      logger::debug("\t-> Archive root I: {}",
+                    first_entry_root.begin()->string());
       logger::debug("\t-> Archive root II: {}", next_entry.begin()->string());
 
       spec->has_single_root = false;
@@ -103,6 +86,26 @@ static void _spec_has_single_root(ArchiveSpec* spec,
     logger::debug("Archive has single root: {}", first_entry_root.string());
 }
 
+Archive::Archive(std::filesystem::path path) : path{path} {
+  int r;  // libarchive error handling
+
+  logger::trace("Setting up archive reader");
+  this->xwim_archive = archive_read_new();
+  archive_read_support_filter_all(this->xwim_archive);
+  archive_read_support_format_all(this->xwim_archive);
+
+  logger::trace("Reading archive at {}", path.c_str());
+  r = archive_read_open_filename(this->xwim_archive, path.c_str(), 10240);
+  if (r != ARCHIVE_OK)
+    throw ArchiveException{"Could not open archive file", this->xwim_archive};
+
+  logger::trace("Archive read succesfully");
+}
+
+Archive::~Archive() {
+  archive_read_free(this->xwim_archive);
+}
+
 ArchiveSpec Archive::check() {
   logger::trace("Creating archive spec for {}", this->path.string());
 
@@ -113,6 +116,7 @@ ArchiveSpec Archive::check() {
     logger::debug("Archive is empty");
     return {false, false, false};
   }
+
   logger::trace("Found archive entry {}", archive_entry_pathname(first_entry));
 
   _spec_is_root_filename(&archive_spec, first_entry, &this->path);
@@ -122,4 +126,6 @@ ArchiveSpec Archive::check() {
   return archive_spec;
 }
 
+void Archive::extract(ExtractSpec extract_spec) {}
+
 }  // namespace xwim

src/archive.hpp

@@ -19,7 +19,7 @@ class Archive {
   archive* xwim_archive;
 
  public:
-  explicit Archive(std::string path);
+  explicit Archive(std::filesystem::path path);
   ~Archive();
 
   ArchiveSpec check();

src/main.cpp

@@ -14,11 +14,30 @@ int main(int argc, char** argv) {
   logger::flush_on(logger::level::trace);
 
   try {
-    std::string filename{argv[1]};
-    xwim::Archive archive{filename};
-    xwim::ArchiveSpec spec = archive.check();
+    std::filesystem::path filepath{argv[1]};
+    xwim::Archive archive{filepath};
+    xwim::ArchiveSpec archive_spec = archive.check();
 
-    logger::info("{}", spec);
+    logger::info("{}", archive_spec);
+
+    xwim::ExtractSpec extract_spec{};
+
+    if (!archive_spec.has_single_root || !archive_spec.is_root_filename) {
+      extract_spec.make_dir = true;
+
+      std::filesystem::path stem = filepath.stem();
+
+      while (stem.has_extension())
+        stem = stem.stem();
+
+      extract_spec.dirname = stem;
+    }
+
+    if (archive_spec.has_subarchive) {
+      extract_spec.extract_subarchive = true;
+    }
+
+    archive.extract(extract_spec);
 
   } catch (xwim::ArchiveException& ae) {
     logger::error("{}", ae.what());

src/spec.hpp

@@ -17,8 +17,9 @@ struct ArchiveSpec {
 };
 
 struct ExtractSpec {
-  bool make_dir;
-  std::filesystem::path dirname;
+  bool make_dir = false;
+  std::filesystem::path dirname{};
+  bool extract_subarchive = false;
 };
 
 }  // namespace xwim
@@ -40,4 +41,20 @@ struct fmt::formatter<xwim::ArchiveSpec> {
   }
 };
 
+template <>
+struct fmt::formatter<xwim::ExtractSpec> {
+  constexpr auto parse(format_parse_context& ctx) { return ctx.begin(); }
+
+  template <typename FormatContext>
+  auto format(const xwim::ExtractSpec& spec, FormatContext& ctx) {
+    return format_to(ctx.out(),
+                     "ExtractSpec["
+                     " .make_dir={},"
+                     " .dirname={}"
+                     " .extract_subarchive={}"
+                     " ]",
+                     spec.make_dir, spec.dirname, spec.extract_subarchive);
+  }
+};
+
 #endif