Release 0.2.1: fix Conan cmake_build_modules + namespaced subdir aliases (#91)

* feat(cmake): add namespaced plotjuggler_core:: ALIAS targets

Build-tree ALIASes mirror the install-tree EXPORT_NAMEs (base, datastore,
plugin_sdk, plugin_host) so consumers can write the same
target_link_libraries call against plotjuggler_core::* regardless of
whether they pick up plotjuggler_core via add_subdirectory() or via
find_package(plotjuggler_core CONFIG REQUIRED).

Without these aliases, subdirectory-mode consumers had to use the
non-namespaced pj_base / pj_plugin_sdk / pj_plugin_host names while
find_package consumers got plotjuggler_core::base / ::plugin_sdk /
::plugin_host. Two ways to express the same link forced every consumer
to write a compatibility shim. ALIAS targets are the canonical CMake
idiom for this exact build-tree / install-tree parity case
(see CMake's importing-exporting guide).

Pure addition; no existing target name is removed.

Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>

* fix(conan): aggregate cmake_build_modules at package level

Conan 2's CMakeDeps generator only aggregates cmake_build_modules
declared at the package level (self.cpp_info), not at component level.
The previous declaration on the sdk component was silently dropped:
plotjuggler_core_BUILD_MODULES_PATHS_RELEASE ended up empty in the
generated <pkg>-release-<arch>-data.cmake, PjPluginManifest.cmake was
never include()d after find_package() returned, and consumers that
called pj_emit_plugin_manifest() saw "Unknown CMake command".

Move the property to self.cpp_info. Documented behavior, per the Conan
CMakeDeps reference: "This property cannot be set in the components,
only in the root self.cpp_info."

Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>

* chore: bump version to 0.2.1

Updates conanfile.py recipe version and CMakeLists.txt
PJ_PACKAGE_VERSION in lockstep so the Conan-published version
and the installed CMake package version stay coherent.

The Release workflow validates conanfile.py vs the tag before
publishing to cloudsmith and creating the GitHub release.

0.2.1 contents (additive, no breaking changes vs 0.2.0):
  - fix(conan): cmake_build_modules now properly aggregated at
    package level — PjPluginManifest.cmake auto-include()s after
    find_package() so pj_emit_plugin_manifest() works without
    consumer-side workarounds.
  - feat(cmake): build-tree plotjuggler_core::* ALIAS targets
    (base, datastore, plugin_sdk, plugin_host) for subdirectory-
    mode / find_package consumer parity.

Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>

---------

Co-authored-by: Davide Faconti <dfaconti@aurynrobotics.com>
Co-authored-by: Claude Opus 4.7 (1M context) <noreply@anthropic.com>

Author: 3 people

CMakeLists.txt

@@ -183,7 +183,7 @@ endif()
 if(PJ_INSTALL_SDK)
   include(CMakePackageConfigHelpers)
 
-  set(PJ_PACKAGE_VERSION "0.2.0")
+  set(PJ_PACKAGE_VERSION "0.2.1")
   set(PJ_PACKAGE_CMAKE_DIR ${CMAKE_INSTALL_LIBDIR}/cmake/plotjuggler_core)
 
   install(EXPORT plotjuggler_coreTargets

conanfile.py

@@ -27,7 +27,7 @@
 
 class PlotjugglerCoreConan(ConanFile):
     name = "plotjuggler_core"
-    version = "0.2.0"
+    version = "0.2.1"
     license = "MIT"
     url = "https://github.com/PlotJuggler/plotjuggler_core"
     description = "C++20 foundation libraries for PlotJuggler: storage engine, plugin SDK, plugin host loaders."
@@ -131,6 +131,16 @@ def package_info(self):
         # No top-level umbrella target: the four components have
         # mutually-exclusive audiences. Consumers must request a component.
 
+        # Conan 2's CMakeDeps only aggregates cmake_build_modules declared at
+        # the package level (self.cpp_info), not at component level — declaring
+        # it on the `sdk` component below silently produced an empty
+        # plotjuggler_core_BUILD_MODULES_PATHS_RELEASE in the generated data
+        # file. Ship the PjPluginManifest helper from the package root so
+        # CMakeDeps actually include()s it after find_package() returns.
+        self.cpp_info.set_property("cmake_build_modules", [
+            os.path.join("lib", "cmake", "plotjuggler_core", "PjPluginManifest.cmake"),
+        ])
+
         # --- base ---
         base = self.cpp_info.components["base"]
         base.set_property("cmake_target_name", "plotjuggler_core::base")
@@ -156,11 +166,6 @@ def package_info(self):
         sdk.libs = []  # INTERFACE only
         sdk.includedirs = ["include"]
         sdk.requires = ["base", "nlohmann_json::nlohmann_json"]
-        # Ship the cmake helper alongside the component. cmake_build_modules
-        # makes Conan auto-include() it after find_package() succeeds.
-        sdk.set_property("cmake_build_modules", [
-            os.path.join("lib", "cmake", "plotjuggler_core", "PjPluginManifest.cmake"),
-        ])
 
         # --- plugin_host (umbrella linking every host-side loader) ---
         if self.options.with_host:

pj_base/CMakeLists.txt

@@ -28,6 +28,11 @@ set_target_properties(pj_base PROPERTIES
   POSITION_INDEPENDENT_CODE ON
   EXPORT_NAME base
 )
+# Build-tree alias so subdirectory-mode consumers can use the same namespaced
+# target name that the install/export tree exposes (and that the Conan package
+# emits). Keeps add_subdirectory() and find_package(plotjuggler_core) consumers
+# writing identical link declarations.
+add_library(plotjuggler_core::base ALIAS pj_base)
 if(PJ_ASSERT_THROWS)
   target_compile_definitions(pj_base PUBLIC PJ_ASSERT_THROWS)
 endif()

pj_datastore/CMakeLists.txt

@@ -33,6 +33,7 @@ set_target_properties(pj_datastore PROPERTIES
   POSITION_INDEPENDENT_CODE ON
   EXPORT_NAME datastore
 )
+add_library(plotjuggler_core::datastore ALIAS pj_datastore)
 if(PJ_ASSERT_THROWS)
   target_compile_definitions(pj_datastore PUBLIC PJ_ASSERT_THROWS)
 endif()

pj_plugins/CMakeLists.txt

@@ -32,6 +32,7 @@ target_include_directories(pj_plugin_sdk INTERFACE
 )
 target_link_libraries(pj_plugin_sdk INTERFACE pj_base pj_dialog_sdk)
 set_target_properties(pj_plugin_sdk PROPERTIES EXPORT_NAME plugin_sdk)
+add_library(plotjuggler_core::plugin_sdk ALIAS pj_plugin_sdk)
 
 # ---------------------------------------------------------------------------
 # pj_plugin_catalog — host-side embedded-manifest discovery
@@ -257,6 +258,7 @@ target_link_libraries(pj_plugin_host INTERFACE
   pj_plugin_catalog
 )
 set_target_properties(pj_plugin_host PROPERTIES EXPORT_NAME plugin_host)
+add_library(plotjuggler_core::plugin_host ALIAS pj_plugin_host)
 
 if(PJ_BUILD_TESTS)