Add -d tool_requires to conan new

conan/api/subapi/new.py

@@ -84,9 +84,14 @@ def render(template_files, definitions):
         result = {}
         name = definitions.get("name", "Pkg")
         definitions["conan_version"] = __version__
-        requires = definitions.get("requires")  # Convert to list, and forget about it
-        if requires:
-            definitions["requires"] = [requires] if isinstance(requires, str) else requires
+
+        def ensure_list(key):
+            value = definitions.get(key)  # Convert to list, and forget about it
+            if value:
+                definitions[key] = [value] if isinstance(value, str) else value
+
+        ensure_list("requires")
+        ensure_list("tool_requires")
 
         def as_package_name(n):
             return n.replace("-", "_").replace("+", "_").replace(".", "_")

conan/cli/commands/new.py

@@ -68,7 +68,7 @@ def get_template_vars():
                 template_vars.extend(meta.find_undeclared_variables(ast))
 
             injected_vars = {"conan_version", "package_name", "as_name"}
-            optional_vars = {"requires"}
+            optional_vars = {"requires", "tool_requires"}
             template_vars = list(set(template_vars) - injected_vars - optional_vars)
             template_vars.sort()
             return template_vars

conan/internal/api/new/basic.py

@@ -29,6 +29,21 @@ def requirements(self):
         pass
         {%- endif %}
 
+    # The build_requirements() method is functionally equivalent to the requirements() one,
+    # being executed just after it. It's a good place to define tool requirements,
+    # dependencies necessary at build time, not at application runtime
+    def build_requirements(self):
+        # Each call to self.tool_requires() will add the corresponding build requirement
+        {% if tool_requires is defined -%}
+        {% for require in tool_requires -%}
+        self.tool_requires("{{ require }}")
+        {% endfor %}
+        {% else -%}
+        # Uncommenting this line will add the cmake >=3.15 build dependency to your project
+        # self.requires("cmake/[>=3.15]")
+        pass
+        {%- endif %}
+
     # The purpose of generate() is to prepare the build, generating the necessary files, such as
     # Files containing information to locate the dependencies, environment activation scripts,
     # and specific build system files among others

conan/internal/api/new/cmake_exe.py

@@ -46,6 +46,13 @@ def requirements(self):
         self.requires("{{ require }}")
         {% endfor %}
     {%- endif %}
+
+    {% if tool_requires is defined -%}
+    def build_requirements(self):
+        {% for require in tool_requires -%}
+        self.tool_requires("{{ require }}")
+        {% endfor %}
+    {%- endif %}
 '''
 
 cmake_exe_v2 = """cmake_minimum_required(VERSION 3.15)

conan/internal/api/new/cmake_lib.py

@@ -56,6 +56,14 @@ def requirements(self):
         self.requires("{{ require }}")
         {% endfor %}
     {%- endif %}
+
+    {% if tool_requires is defined -%}
+    def build_requirements(self):
+        {% for require in tool_requires -%}
+        self.tool_requires("{{ require }}")
+        {% endfor %}
+    {%- endif %}
+
 '''
 
 cmake_v2 = """cmake_minimum_required(VERSION 3.15)