More fixes for iwyu

src/libflake/config.cc

@@ -1,19 +1,17 @@
 #include <nlohmann/json.hpp>
 #include <assert.h>
 #include <stdint.h>
-#include <boost/format.hpp>
-#include <boost/optional/optional.hpp>
 #include <nlohmann/json_fwd.hpp>
 #include <cctype>
 #include <filesystem>
 #include <map>
 #include <memory>
 #include <optional>
-#include <ostream>
 #include <string>
 #include <utility>
 #include <variant>
 #include <vector>
+#include <format>
 
 #include "nix/util/users.hh"
 #include "nix/util/config-global.hh"

src/libflake/flake.cc

@@ -3,8 +3,6 @@
 #include <stdint.h>
 #include <boost/container/detail/std_fwd.hpp>
 #include <boost/core/pointer_traits.hpp>
-#include <boost/format.hpp>
-#include <boost/optional/optional.hpp>
 #include <boost/unordered/detail/foa/table.hpp>
 #include <algorithm>
 #include <filesystem>
@@ -12,7 +10,6 @@
 #include <map>
 #include <memory>
 #include <optional>
-#include <ostream>
 #include <set>
 #include <span>
 #include <string>
@@ -20,6 +17,7 @@
 #include <utility>
 #include <variant>
 #include <vector>
+#include <format>
 
 #include "nix/util/terminal.hh"
 #include "nix/util/ref.hh"
@@ -909,7 +907,7 @@ static ref<SourceAccessor> makeInternalFS()
     internalFS->setPathDisplay("«flakes-internal»", "");
     internalFS->addFile(
         CanonPath("call-flake.nix"),
-#include "call-flake.nix.gen.hh"
+#include "call-flake.nix.gen.hh" // IWYU pragma: keep
     );
     return internalFS;
 }

src/libflake/flakeref.cc

@@ -1,12 +1,15 @@
 #include <assert.h>
 #include <sys/stat.h>
 #include <sys/types.h>
-#include <boost/format.hpp>
-#include <boost/optional/optional.hpp>
 #include <filesystem>
 #include <ostream>
 #include <string_view>
 #include <vector>
+#include <optional>
+#include <regex>
+#include <string>
+#include <tuple>
+#include <utility>
 
 #include "nix/flake/flakeref.hh"
 #include "nix/util/url.hh"
@@ -18,8 +21,16 @@
 #include "nix/util/logging.hh"
 #include "nix/util/strings.hh"
 #include "nix/util/util.hh"
+#include "nix/fetchers/attrs.hh"
+#include "nix/fetchers/registry.hh"
+#include "nix/store/outputs-spec.hh"
+#include "nix/util/ref.hh"
+#include "nix/util/types.hh"
 
 namespace nix {
+class Store;
+struct SourceAccessor;
+
 namespace fetchers {
 struct Settings;
 }  // namespace fetchers

src/libflake/lockfile.cc

@@ -1,8 +1,6 @@
 #include <boost/unordered/unordered_flat_set.hpp>
 #include <nlohmann/json.hpp>
 #include <assert.h>
-#include <boost/format.hpp>
-#include <boost/optional/optional.hpp>
 #include <boost/unordered/unordered_flat_set_fwd.hpp>
 #include <nlohmann/detail/iterators/iter_impl.hpp>
 #include <nlohmann/detail/iterators/iteration_proxy.hpp>

src/libflake/url-name.cc

@@ -1,4 +1,6 @@
 #include <regex>
+#include <optional>
+#include <string>
 
 #include "nix/flake/url-name.hh"
 #include "nix/util/strings.hh"