CMakeDeps/CMakeToolchain: Several improvements for open issues

conan/tools/cmake/cmakedeps/cmakedeps.py

@@ -1,4 +1,5 @@
 import os
+from fnmatch import fnmatch
 
 from conan.tools._check_build_profile import check_using_build_profile
 from conan.tools.cmake.cmakedeps.templates.config import ConfigTemplate
@@ -11,6 +12,11 @@
 from conans.util.files import save
 
 
+FIND_MODE_MODULE = "module"
+FIND_MODE_CONFIG = "config"
+FIND_MODE_NONE = "none"
+FIND_MODE_BOTH = "both"
+
 class CMakeDeps(object):
 
     def __init__(self, conanfile):
@@ -75,26 +81,38 @@ def content(self):
             if dep.is_build_context and dep.ref.name not in self.build_context_activated:
                 continue
 
-            if dep.new_cpp_info.get_property("skip_deps_file", "CMakeDeps"):
+            cmake_find_mode = dep.new_cpp_info.get_property("cmake_find_mode", "CMakeDeps") or FIND_MODE_CONFIG
+            cmake_find_mode = cmake_find_mode.lower()
+            # Skip from the requirement
+            if cmake_find_mode == FIND_MODE_NONE:
                 # Skip the generation of config files for this node, it will be located externally
                 continue
 
+            if cmake_find_mode in (FIND_MODE_CONFIG, FIND_MODE_BOTH):
+                self._generate_files(require, dep, ret, find_module_mode=False)
+
+            if cmake_find_mode in (FIND_MODE_MODULE, FIND_MODE_BOTH):
+                self._generate_files(require, dep, ret, find_module_mode=True)
+
+        return ret
+
+    def _generate_files(self, require, dep, ret, find_module_mode):
+        if not find_module_mode:
             config_version = ConfigVersionTemplate(self, require, dep)
             ret[config_version.filename] = config_version.render()
 
-            data_target = ConfigDataTemplate(self, require, dep)
-            ret[data_target.filename] = data_target.render()
+        data_target = ConfigDataTemplate(self, require, dep, find_module_mode)
+        ret[data_target.filename] = data_target.render()
 
-            target_configuration = TargetConfigurationTemplate(self, require, dep)
-            ret[target_configuration.filename] = target_configuration.render()
+        target_configuration = TargetConfigurationTemplate(self, require, dep, find_module_mode)
+        ret[target_configuration.filename] = target_configuration.render()
 
-            targets = TargetsTemplate(self, require, dep)
-            ret[targets.filename] = targets.render()
+        targets = TargetsTemplate(self, require, dep, find_module_mode)
+        ret[targets.filename] = targets.render()
 
-            config = ConfigTemplate(self, require, dep)
-            # Check if the XXConfig.cmake exists to keep the first generated configuration
-            # to only include the build_modules from the first conan install. The rest of the
-            # file is common for the different configurations.
-            if not os.path.exists(config.filename):
-                ret[config.filename] = config.render()
-        return ret
+        config = ConfigTemplate(self, require, dep, find_module_mode)
+        # Check if the XXConfig.cmake exists to keep the first generated configuration
+        # to only include the build_modules from the first conan install. The rest of the
+        # file is common for the different configurations.
+        if not os.path.exists(config.filename):
+            ret[config.filename] = config.render()

conan/tools/cmake/cmakedeps/templates/__init__.py

@@ -7,22 +7,23 @@
 
 class CMakeDepsFileTemplate(object):
 
-    def __init__(self, cmakedeps, require, conanfile):
+    def __init__(self, cmakedeps, require, conanfile, find_module_mode=False):
         self.cmakedeps = cmakedeps
         self.require = require
         self.conanfile = conanfile
+        self.find_module_mode = find_module_mode
 
     @property
     def pkg_name(self):
         return self.conanfile.ref.name + self.suffix
 
     @property
     def target_namespace(self):
-        return get_target_namespace(self.conanfile) + self.suffix
+        return self.get_target_namespace(self.conanfile) + self.suffix
 
     @property
     def file_name(self):
-        return get_file_name(self.conanfile) + self.suffix
+        return get_file_name(self.conanfile, self.find_module_mode) + self.suffix
 
     @property
     def suffix(self):
@@ -74,29 +75,34 @@ def arch(self):
     def config_suffix(self):
         return "_{}".format(self.configuration.upper()) if self.configuration else ""
 
-    def get_target_namespace(self):
-        return get_target_namespace(self.conanfile)
-
     def get_file_name(self):
-        return get_file_name(self.conanfile)
-
-
-def get_target_namespace(req):
-    ret = req.new_cpp_info.get_property("cmake_target_name", "CMakeDeps")
-    if not ret:
-        ret = req.cpp_info.get_name("cmake_find_package_multi", default_name=False)
-    return ret or req.ref.name
-
-
-def get_component_alias(req, comp_name):
-    if comp_name not in req.new_cpp_info.components:
-        # foo::foo might be referencing the root cppinfo
-        if req.ref.name == comp_name:
-            return get_target_namespace(req)
-        raise ConanException("Component '{name}::{cname}' not found in '{name}' "
-                             "package requirement".format(name=req.ref.name, cname=comp_name))
-    ret = req.new_cpp_info.components[comp_name].get_property("cmake_target_name", "CMakeDeps")
-    if not ret:
-        ret = req.cpp_info.components[comp_name].get_name("cmake_find_package_multi",
-                                                          default_name=False)
-    return ret or comp_name
+        return get_file_name(self.conanfile, find_module_mode=self.find_module_mode)
+
+    def get_target_namespace(self, req):
+        if self.find_module_mode:
+            ret = req.new_cpp_info.get_property("cmake_module_target_name", "CMakeDeps")
+            if ret:
+                return ret
+
+        ret = req.new_cpp_info.get_property("cmake_target_name", "CMakeDeps")
+        if not ret:
+            ret = req.cpp_info.get_name("cmake_find_package_multi", default_name=False)
+        return ret or req.ref.name
+
+    def get_component_alias(self, req, comp_name):
+        if comp_name not in req.new_cpp_info.components:
+            # foo::foo might be referencing the root cppinfo
+            if req.ref.name == comp_name:
+                return self.get_target_namespace(req)
+            raise ConanException("Component '{name}::{cname}' not found in '{name}' "
+                                 "package requirement".format(name=req.ref.name, cname=comp_name))
+        if self.find_module_mode:
+            ret = req.new_cpp_info.components[comp_name].get_property("cmake_module_target_name",
+                                                                      "CMakeDeps")
+            if ret:
+                return ret
+        ret = req.new_cpp_info.components[comp_name].get_property("cmake_target_name", "CMakeDeps")
+        if not ret:
+            ret = req.cpp_info.components[comp_name].get_name("cmake_find_package_multi",
+                                                              default_name=False)
+        return ret or comp_name

conan/tools/cmake/cmakedeps/templates/config.py

@@ -14,31 +14,51 @@ class ConfigTemplate(CMakeDepsFileTemplate):
 
     @property
     def filename(self):
-        if self.file_name == self.file_name.lower():
-            return "{}-config.cmake".format(self.file_name)
+        if self.find_module_mode:
+            return "Find{}.cmake".format(self.file_name)
         else:
-            return "{}Config.cmake".format(self.file_name)
+            if self.file_name == self.file_name.lower():
+                return "{}-config.cmake".format(self.file_name)
+            else:
+                return "{}Config.cmake".format(self.file_name)
 
     @property
     def context(self):
-        return {"file_name": self.file_name,
+        targets_include = "" if not self.find_module_mode else "module-"
+        targets_include += "{}Targets.cmake".format(self.file_name)
+        return {"is_module": self.find_module_mode,
+                "version": self.conanfile.ref.version,
+                "file_name": self.file_name,
                 "pkg_name": self.pkg_name,
                 "config_suffix": self.config_suffix,
                 "target_namespace": self.target_namespace,
-                "check_components_exist": self.cmakedeps.check_components_exist}
+                "check_components_exist": self.cmakedeps.check_components_exist,
+                "targets_include_file": targets_include}
 
     @property
     def template(self):
         return textwrap.dedent("""\
         ########## MACROS ###########################################################################
         #############################################################################################
+
         # Requires CMake > 3.15
         if(${CMAKE_VERSION} VERSION_LESS "3.15")
             message(FATAL_ERROR "The 'CMakeDeps' generator only works with CMake >= 3.15")
         endif()
 
+        {% if is_module %}
+        include(FindPackageHandleStandardArgs)
+        set({{ pkg_name }}_FOUND 1)
+        set({{ pkg_name }}_VERSION "{{ version }}")
+
+        find_package_handle_standard_args({{ pkg_name }}
+                                          REQUIRED_VARS {{ pkg_name }}_VERSION
+                                          VERSION_VAR {{ pkg_name }}_VERSION)
+        mark_as_advanced({{ pkg_name }}_FOUND {{ pkg_name }}_VERSION)
+        {% endif %}
+
         include(${CMAKE_CURRENT_LIST_DIR}/cmakedeps_macros.cmake)
-        include(${CMAKE_CURRENT_LIST_DIR}/{{ file_name }}Targets.cmake)
+        include(${CMAKE_CURRENT_LIST_DIR}/{{ targets_include_file }})
         include(CMakeFindDependencyMacro)
 
         foreach(_DEPENDENCY {{ '${' + pkg_name + '_FIND_DEPENDENCY_NAMES' + '}' }} )

conan/tools/cmake/cmakedeps/templates/target_configuration.py

@@ -1,7 +1,6 @@
 import textwrap
 
-from conan.tools.cmake.cmakedeps.templates import CMakeDepsFileTemplate, get_component_alias, \
-    get_target_namespace
+from conan.tools.cmake.cmakedeps.templates import CMakeDepsFileTemplate
 
 """
 
@@ -14,8 +13,9 @@ class TargetConfigurationTemplate(CMakeDepsFileTemplate):
 
     @property
     def filename(self):
-        return "{}Target-{}.cmake".format(self.file_name,
-                                          self.cmakedeps.configuration.lower())
+        name = "" if not self.find_module_mode else "module-"
+        name += "{}-Target-{}.cmake".format(self.file_name, self.cmakedeps.configuration.lower())
+        return name
 
     @property
     def context(self):
@@ -147,7 +147,7 @@ def get_required_components_names(self):
         ret = []
         sorted_comps = self.conanfile.new_cpp_info.get_sorted_components()
         for comp_name, comp in sorted_comps.items():
-            ret.append(get_component_alias(self.conanfile, comp_name))
+            ret.append(self.get_component_alias(self.conanfile, comp_name))
         ret.reverse()
         return ret
 
@@ -163,16 +163,15 @@ def get_deps_targets_names(self):
             for dep_name, component_name in self.conanfile.new_cpp_info.required_components:
                 if not dep_name:
                     # Internal dep (no another component)
-                    dep_name = get_target_namespace(self.conanfile)
                     req = self.conanfile
                 else:
                     req = self.conanfile.dependencies.host[dep_name]
-                    dep_name = get_target_namespace(req)
 
-                component_name = get_component_alias(req, component_name)
+                dep_name = self.get_target_namespace(req)
+                component_name = self.get_component_alias(req, component_name)
                 ret.append("{}::{}".format(dep_name, component_name))
         elif self.conanfile.dependencies.direct_host:
             # Regular external "conanfile.requires" declared, not cpp_info requires
-            ret = ["{p}::{p}".format(p=get_target_namespace(r))
+            ret = ["{p}::{p}".format(p=self.get_target_namespace(r))
                    for r in self.conanfile.dependencies.direct_host.values()]
         return ret

conan/tools/cmake/cmakedeps/templates/target_data.py

@@ -1,8 +1,7 @@
 import os
 import textwrap
 
-from conan.tools.cmake.cmakedeps.templates import CMakeDepsFileTemplate, get_component_alias, \
-    get_target_namespace
+from conan.tools.cmake.cmakedeps.templates import CMakeDepsFileTemplate
 from conan.tools.cmake.utils import get_file_name
 
 """
@@ -16,7 +15,8 @@ class ConfigDataTemplate(CMakeDepsFileTemplate):
 
     @property
     def filename(self):
-        data_fname = "{}-{}".format(self.file_name, self.configuration.lower())
+        data_fname = "" if not self.find_module_mode else "module-"
+        data_fname += "{}-{}".format(self.file_name, self.configuration.lower())
         if self.arch:
             data_fname += "-{}".format(self.arch)
         data_fname += "-data.cmake"
@@ -122,14 +122,14 @@ def get_required_components_cpp(self):
                 if "::" in require:  # Points to a component of a different package
                     pkg, cmp_name = require.split("::")
                     req = self.conanfile.dependencies.direct_host[pkg]
-                    public_comp_deps.append("{}::{}".format(get_target_namespace(req),
-                                                            get_component_alias(req, cmp_name)))
+                    public_comp_deps.append("{}::{}".format(self.get_target_namespace(req),
+                                                            self.get_component_alias(req, cmp_name)))
                 else:  # Points to a component of same package
                     public_comp_deps.append("{}::{}".format(self.target_namespace,
-                                                            get_component_alias(self.conanfile,
-                                                                                 require)))
+                                                            self.get_component_alias(self.conanfile,
+                                                                                     require)))
             deps_cpp_cmake.public_deps = " ".join(public_comp_deps)
-            component_rename = get_component_alias(self.conanfile, comp_name)
+            component_rename = self.get_component_alias(self.conanfile, comp_name)
             ret.append((component_rename, deps_cpp_cmake))
         ret.reverse()
         return ret
@@ -143,9 +143,9 @@ def _get_dependency_filenames(self):
             for dep_name, _ in self.conanfile.new_cpp_info.required_components:
                 if dep_name and dep_name not in ret:  # External dep
                     req = direct_host[dep_name]
-                    ret.append(get_file_name(req))
+                    ret.append(get_file_name(req, self.find_module_mode))
         elif direct_host:
-            ret = [get_file_name(r) for r in direct_host.values()]
+            ret = [get_file_name(r, self.find_module_mode) for r in direct_host.values()]
 
         return ret
 

conan/tools/cmake/cmakedeps/templates/targets.py

@@ -13,21 +13,30 @@ class TargetsTemplate(CMakeDepsFileTemplate):
 
     @property
     def filename(self):
-        return "{}Targets.cmake".format(self.file_name)
+        name = "" if not self.find_module_mode else "module-"
+        name += self.file_name + "Targets.cmake"
+        return name
 
     @property
     def context(self):
+        data_pattern = "${_DIR}/" if not self.find_module_mode else "${_DIR}/module-"
+        data_pattern += "{}-*-data.cmake".format(self.file_name)
+
+        target_pattern = "" if not self.find_module_mode else "module-"
+        target_pattern += "{}-Target-*.cmake".format(self.file_name)
+
         ret = {"pkg_name": self.pkg_name,
                "target_namespace": self.target_namespace,
-               "file_name": self.file_name}
+               "data_pattern": data_pattern,
+               "target_pattern": target_pattern}
         return ret
 
     @property
     def template(self):
         return textwrap.dedent("""\
         # Load the debug and release variables
         get_filename_component(_DIR "${CMAKE_CURRENT_LIST_FILE}" PATH)
-        file(GLOB DATA_FILES "${_DIR}/{{ file_name }}-*-data.cmake")
+        file(GLOB DATA_FILES "{{data_pattern}}")
 
         foreach(f ${DATA_FILES})
             include(${f})
@@ -48,7 +57,7 @@ def template(self):
 
         # Load the debug and release library finders
         get_filename_component(_DIR "${CMAKE_CURRENT_LIST_FILE}" PATH)
-        file(GLOB CONFIG_FILES "${_DIR}/{{ file_name }}Target-*.cmake")
+        file(GLOB CONFIG_FILES "${_DIR}/{{ target_pattern }}")
 
         foreach(f ${CONFIG_FILES})
             include(${f})